From 8e084b1517088036e3db9bbd255b1c231cd2a108 Mon Sep 17 00:00:00 2001 From: Uwe Hermann Date: Thu, 30 Dec 2010 02:12:31 +0100 Subject: Move STM32-specific source to lib/stm32 subdir. --- lib/stm32/adc.c | 375 +++++++++++++++++++++++++++++++++++ lib/stm32/can.c | 305 +++++++++++++++++++++++++++++ lib/stm32/dma.c | 543 +++++++++++++++++++++++++++++++++++++++++++++++++++ lib/stm32/ethernet.c | 53 +++++ lib/stm32/exti.c | 140 +++++++++++++ lib/stm32/flash.c | 189 ++++++++++++++++++ lib/stm32/gpio.c | 122 ++++++++++++ lib/stm32/i2c.c | 93 +++++++++ lib/stm32/nvic.c | 106 ++++++++++ lib/stm32/rcc.c | 542 ++++++++++++++++++++++++++++++++++++++++++++++++++ lib/stm32/rtc.c | 282 ++++++++++++++++++++++++++ lib/stm32/scb.c | 30 +++ lib/stm32/spi.c | 290 +++++++++++++++++++++++++++ lib/stm32/systick.c | 64 ++++++ lib/stm32/timer.c | 166 ++++++++++++++++ lib/stm32/usart.c | 120 ++++++++++++ 16 files changed, 3420 insertions(+) create mode 100644 lib/stm32/adc.c create mode 100644 lib/stm32/can.c create mode 100644 lib/stm32/dma.c create mode 100644 lib/stm32/ethernet.c create mode 100644 lib/stm32/exti.c create mode 100644 lib/stm32/flash.c create mode 100644 lib/stm32/gpio.c create mode 100644 lib/stm32/i2c.c create mode 100644 lib/stm32/nvic.c create mode 100644 lib/stm32/rcc.c create mode 100644 lib/stm32/rtc.c create mode 100644 lib/stm32/scb.c create mode 100644 lib/stm32/spi.c create mode 100644 lib/stm32/systick.c create mode 100644 lib/stm32/timer.c create mode 100644 lib/stm32/usart.c (limited to 'lib/stm32') diff --git a/lib/stm32/adc.c b/lib/stm32/adc.c new file mode 100644 index 0000000..240c3f6 --- /dev/null +++ b/lib/stm32/adc.c @@ -0,0 +1,375 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2009 Edward Cheeseman + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +/* + * Basic ADC handling API. + * + * Examples: + * rcc_peripheral_enable_clock(&RCC_APB2ENR, ADC1EN); + * rcc_peripheral_disable_clock(&RCC_APB2ENR, ADC1EN); + * rcc_peripheral_reset(&RCC_APB2RSTR, ADC1RST); + * rcc_peripheral_clear_reset(&RCC_APB2RSTR, ADC1RST); + * + * rcc_set_adc_clk(ADC_PRE_PLCK2_DIV2); + * adc_set_mode(ADC1, TODO); + * reg16 = adc_read(ADC1, ADC_CH_0); + */ + +#include + +void rcc_set_adc_clk(u32 prescaler) +{ + /* TODO */ + + /* FIXME: QUICK HACK to prevent compiler warnings. */ + prescaler = prescaler; +} + +void adc_set_mode(u32 block, /* TODO */ u8 mode) +{ + /* TODO */ + + /* FIXME: QUICK HACK to prevent compiler warnings. */ + block = block; + mode = mode; +} + +void adc_read(u32 block, u32 channel) +{ + /* TODO */ + + /* FIXME: QUICK HACK to prevent compiler warnings. */ + block = block; + channel = channel; +} + +void adc_enable_analog_watchdog_regular(u32 adc) +{ + ADC_CR1(adc) |= ADC_CR1_AWDEN; +} + +void adc_disable_analog_watchdog_regular(u32 adc) +{ + ADC_CR1(adc) &= ~ADC_CR1_AWDEN; +} + +void adc_enable_analog_watchdog_injected(u32 adc) +{ + ADC_CR1(adc) |= ADC_CR1_JAWDEN; +} + +void adc_disable_analog_watchdog_injected(u32 adc) +{ + ADC_CR1(adc) &= ~ADC_CR1_JAWDEN; +} + +void adc_enable_discontinous_mode_regular(u32 adc) +{ + ADC_CR1(adc) |= ADC_CR1_DISCEN; +} + +void adc_disable_discontinous_mode_regular(u32 adc) +{ + ADC_CR1(adc) &= ~ADC_CR1_DISCEN; +} + +void adc_enable_discontinous_mode_injected(u32 adc) +{ + ADC_CR1(adc) |= ADC_CR1_JDISCEN; +} + +void adc_disable_discontinous_mode_injected(u32 adc) +{ + ADC_CR1(adc) &= ~ADC_CR1_JDISCEN; +} + +void adc_enable_automatic_injected_group_conversion(u32 adc) +{ + ADC_CR1(adc) |= ADC_CR1_JAUTO; +} + +void adc_disable_automatic_injected_group_conversion(u32 adc) +{ + ADC_CR1(adc) &= ~ADC_CR1_JAUTO; +} + +void adc_enable_analog_watchdog_on_all_channels(u32 adc) +{ + ADC_CR1(adc) |= ADC_CR1_AWDSGL; +} + +void adc_enable_analog_watchdog_on_selected_channel(u32 adc, u8 channel) +{ + u32 reg32; + + reg32 = (ADC_CR1(adc) & 0xffffffe0); /* Clear bits [4:0]. */ + if (channel < 18) + reg32 |= channel; + ADC_CR1(adc) = reg32; + ADC_CR1(adc) &= ~ADC_CR1_AWDSGL; +} + +void adc_enable_scan_mode(u32 adc) +{ + ADC_CR1(adc) |= ADC_CR1_SCAN; +} + +void adc_disable_scan_mode(u32 adc) +{ + ADC_CR1(adc) &= ~ADC_CR1_SCAN; +} + +void adc_enable_jeoc_interrupt(u32 adc) +{ + ADC_CR1(adc) |= ADC_CR1_JEOCIE; +} + +void adc_disable_jeoc_interrupt(u32 adc) +{ + ADC_CR1(adc) &= ~ADC_CR1_JEOCIE; +} + +void adc_enable_awd_interrupt(u32 adc) +{ + ADC_CR1(adc) |= ADC_CR1_AWDIE; +} + +void adc_disable_awd_interrupt(u32 adc) +{ + ADC_CR1(adc) &= ~ADC_CR1_AWDIE; +} + +void adc_enable_eoc_interrupt(u32 adc) +{ + ADC_CR1(adc) |= ADC_CR1_EOCIE; +} + +void adc_disable_eoc_interrupt(u32 adc) +{ + ADC_CR1(adc) &= ~ADC_CR1_EOCIE; +} + +void adc_enable_temperature_sensor(u32 adc) +{ + ADC_CR2(adc) |= ADC_CR2_TSVREFE; +} + +void adc_disable_temperature_sensor(u32 adc) +{ + ADC_CR2(adc) &= ~ADC_CR2_TSVREFE; +} + +void adc_start_conversion_regular(u32 adc) +{ + /* start conversion on regular channels */ + ADC_CR2(adc) |= ADC_CR2_SWSTART; + + /* wait til the ADC starts the conversion */ + while (ADC_CR2(adc) & ADC_CR2_SWSTART); +} + +void adc_start_conversion_injected(u32 adc) +{ + /* start conversion on injected channels */ + ADC_CR2(adc) |= ADC_CR2_JSWSTART; + + /* wait til the ADC starts the conversion */ + while (ADC_CR2(adc) & ADC_CR2_JSWSTART); +} + +void adc_enable_external_trigger_regular(u32 adc, u8 trigger) +{ + u32 reg32; + + reg32 = (ADC_CR2(adc) & 0xfff1ffff); /* Clear bits [19:17]. */ + if (trigger < 8) + reg32 |= (trigger << ADC_CR2_EXTSEL_LSB); + ADC_CR2(adc) = reg32; + ADC_CR2(adc) |= ADC_CR2_EXTTRIG; +} + +void adc_disable_external_trigger_regular(u32 adc) +{ + ADC_CR2(adc) &= ~ADC_CR2_EXTTRIG; +} + +void adc_enable_external_trigger_injected(u32 adc, u8 trigger) +{ + u32 reg32; + + reg32 = (ADC_CR2(adc) & 0xffff8fff); /* Clear bits [12:14]. */ + if (trigger < 8) + reg32 |= (trigger << ADC_CR2_JEXTSEL_LSB); + ADC_CR2(adc) = reg32; + ADC_CR2(adc) |= ADC_CR2_JEXTTRIG; +} + +void adc_disable_external_trigger_injected(u32 adc) +{ + ADC_CR2(adc) &= ~ADC_CR2_JEXTTRIG; +} + +void adc_set_left_aligned(u32 adc) +{ + ADC_CR2(adc) |= ADC_CR2_ALIGN; +} + +void adc_set_right_aligned(u32 adc) +{ + ADC_CR2(adc) &= ~ADC_CR2_ALIGN; +} + +void adc_enable_dma(u32 adc) +{ + if ((adc == ADC1) | (adc==ADC3)) + ADC_CR2(adc) |= ADC_CR2_DMA; +} + +void adc_disable_dma(u32 adc) +{ + if ((adc == ADC1) | (adc==ADC3)) + ADC_CR2(adc) &= ~ADC_CR2_DMA; +} + +void adc_reset_calibration(u32 adc) +{ + ADC_CR2(adc) |= ADC_CR2_RSTCAL; + while (ADC_CR2(adc) & ADC_CR2_RSTCAL); +} + +void adc_calibration(u32 adc) +{ + ADC_CR2(adc) |= ADC_CR2_CAL; + while (ADC_CR2(adc) & ADC_CR2_CAL); +} + +void adc_set_continous_conversion_mode(u32 adc) +{ + ADC_CR2(adc) |= ADC_CR2_CONT; +} + +void adc_set_single_conversion_mode(u32 adc) +{ + ADC_CR2(adc) &= ~ADC_CR2_CONT; +} + +void adc_on(u32 adc) +{ + ADC_CR2(adc) |= ADC_CR2_ADON; +} + +void adc_off(u32 adc) +{ + ADC_CR2(adc) &= ~ADC_CR2_ADON; +} + +void adc_set_conversion_time(u32 adc, u8 channel, u8 time) +{ + u32 reg32; + + if (channel < 10) { + reg32 = ADC_SMPR2(adc); + reg32 &= ~(0b111 << (channel * 3)); + reg32 |= (time << (channel * 3)); + ADC_SMPR2(adc) = reg32; + } + else { + reg32 = ADC_SMPR1(adc); + reg32 &= ~(0b111 << ((channel-10) * 3)); + reg32 |= (time << ((channel-10) * 3)); + ADC_SMPR1(adc) = reg32; + } +} + +void adc_set_conversion_time_on_all_channels(u32 adc, u8 time) +{ + u32 reg32 = 0; + u8 i; + + for (i = 0; i <= 9; i++) { + reg32 |= (time << (i * 3)); + } + ADC_SMPR2(adc) = reg32; + + for (i = 10; i <= 17; i++) { + reg32 |= (time << ((i-10) * 3)); + } + ADC_SMPR1(adc) = reg32; +} + +void adc_set_watchdog_high_threshold(u32 adc, u16 threshold) +{ + u32 reg32 = 0; + + reg32 = (u32)threshold; + reg32 &= ~0xfffff000; /* clear all bits above 11 */ + ADC_HTR(adc) = reg32; +} + +void adc_set_watchdog_low_threshold(u32 adc, u16 threshold) +{ + u32 reg32 = 0; + + reg32 = (u32)threshold; + reg32 &= ~0xfffff000; /* clear all bits above 11 */ + ADC_LTR(adc) = reg32; +} + +void adc_set_regular_sequence(u32 adc, u8 length, u8 channel[]) +{ + u32 reg32_1 = 0; + u32 reg32_2 = 0; + u32 reg32_3 = 0; + u8 i = 0; + + /* maximum sequence length is 16 channels */ + if (length > 16) + return; + + for (i=1; i<=length; i++) { + if (i <= 6) + reg32_3 |= (channel[i-1] << ((i-1) * 5)); + if ((i > 6) & (i <= 12)) + reg32_2 |= (channel[i-1] << ((i-6-1) * 5)); + if ((i > 12) & (i <= 16)) + reg32_1 |= (channel[i-1] << ((i-12-1) * 5)); + } + reg32_1 |= ((length -1) << ADC_SQR1_L_LSB); + + ADC_SQR1(adc) = reg32_1; + ADC_SQR2(adc) = reg32_2; + ADC_SQR3(adc) = reg32_3; +} + +void adc_set_injected_sequence(u32 adc, u8 length, u8 channel[]) +{ + u32 reg32 = 0; + u8 i = 0; + + /* maximum sequence length is 4 channels */ + if (length > 4) + return; + + for (i = 1; i <= length; i++) { + reg32 |= (channel[i-1] << ((i-1) * 5)); + } + reg32 |= ((length-1) << ADC_JSQR_JL_LSB); + + ADC_JSQR(adc) = reg32; +} diff --git a/lib/stm32/can.c b/lib/stm32/can.c new file mode 100644 index 0000000..baddab3 --- /dev/null +++ b/lib/stm32/can.c @@ -0,0 +1,305 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2010 Piotr Esden-Tempski + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include + +void can_reset(u32 canport) +{ + if (canport == CAN1) { + rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB1RSTR_CAN1RST); + rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB1RSTR_CAN1RST); + } else { + rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB1RSTR_CAN2RST); + rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB1RSTR_CAN2RST); + } +} + +int can_init(u32 canport, bool ttcm, bool abom, bool awum, bool nart, + bool rflm, bool txfp, u32 sjw, u32 ts1, u32 ts2, u32 brp) +{ + u32 wait_ack = 0x00000000; + u32 can_msr_inak_timeout = 0x0000FFFF; + int ret = 0; + + /* Exit from sleep mode. */ + CAN_MCR(canport) &= ~CAN_MCR_SLEEP; + + /* Request initialization "enter". */ + CAN_MCR(canport) |= CAN_MCR_INRQ; + + /* Wait for acknowledge. */ + while ((wait_ack != can_msr_inak_timeout) && + ((CAN_MSR(canport) & CAN_MSR_INAK) != CAN_MSR_INAK)) { + wait_ack++; + } + + /* Check the acknowledge. */ + if ((CAN_MSR(canport) & CAN_MSR_INAK) != CAN_MSR_INAK) + return 1; + + /* Set the automatic bus-off management. */ + if (ttcm) + CAN_MCR(canport) |= CAN_MCR_TTCM; + else + CAN_MCR(canport) &= ~CAN_MCR_TTCM; + + if (abom) + CAN_MCR(canport) |= CAN_MCR_ABOM; + else + CAN_MCR(canport) &= ~CAN_MCR_ABOM; + + if (awum) + CAN_MCR(canport) |= CAN_MCR_AWUM; + else + CAN_MCR(canport) &= ~CAN_MCR_AWUM; + + if (nart) + CAN_MCR(canport) |= CAN_MCR_NART; + else + CAN_MCR(canport) &= ~CAN_MCR_NART; + + if (rflm) + CAN_MCR(canport) |= CAN_MCR_RFLM; + else + CAN_MCR(canport) &= ~CAN_MCR_RFLM; + + if (txfp) + CAN_MCR(canport) |= CAN_MCR_TXFP; + else + CAN_MCR(canport) &= ~CAN_MCR_TXFP; + + /* Set bit timings. */ + CAN_BTR(canport) = sjw | ts2 | ts1 | + (u32)(CAN_BTR_BRP_MASK & (brp - 1)); + + /* Request initialization "leave". */ + CAN_MCR(canport) &= ~CAN_MCR_INRQ; + + /* Wait for acknowledge. */ + wait_ack = 0x00000000; + while ((wait_ack != can_msr_inak_timeout) && + ((CAN_MSR(canport) & CAN_MSR_INAK) == CAN_MSR_INAK)) { + wait_ack++; + } + + if ((CAN_MSR(canport) & CAN_MSR_INAK) == CAN_MSR_INAK) + ret = 1; + + return ret; +} + +void can_filter_init(u32 canport, u32 nr, bool scale_32bit, bool id_list_mode, + u32 fr1, u32 fr2, u32 fifo, bool enable) +{ + u32 filter_select_bit = 0x00000001 << nr; + + /* Request initialization "enter". */ + CAN_FMR(canport) |= CAN_FMR_FINIT; + + /* Deactivate the filter. */ + CAN_FA1R(canport) &= ~filter_select_bit; + + if (scale_32bit) { + /* Set 32-bit scale for the filter. */ + CAN_FS1R(canport) |= filter_select_bit; + } else { + /* Set 16-bit scale for the filter. */ + CAN_FS1R(canport) &= ~filter_select_bit; + } + + if (id_list_mode) { + /* Set filter mode to ID list mode. */ + CAN_FM1R(canport) |= filter_select_bit; + } else { + /* Set filter mode to id/mask mode. */ + CAN_FM1R(canport) &= ~filter_select_bit; + } + + /* Set the first filter register. */ + CAN_FiR1(canport, nr) = fr1; + + /* Set the second filter register. */ + CAN_FiR2(canport, nr) = fr2; + + /* Select FIFO0 or FIFO1 as filter assignement. */ + if (fifo) + CAN_FFA1R(canport) |= filter_select_bit; /* FIFO1 */ + else + CAN_FFA1R(canport) &= ~filter_select_bit; /* FIFO0 */ + + if (enable) + CAN_FA1R(canport) |= filter_select_bit; /* Activate filter. */ + + /* Request initialization "leave". */ + CAN_FMR(canport) &= ~CAN_FMR_FINIT; +} + +void can_filter_id_mask_16bit_init(u32 canport, u32 nr, u16 id1, u16 mask1, + u16 id2, u16 mask2, u32 fifo, bool enable) +{ + can_filter_init(canport, nr, false, false, + ((u32)id1 << 16) | (u32)mask1, + ((u32)id2 << 16) | (u32)mask2, fifo, enable); +} + +void can_filter_id_mask_32bit_init(u32 canport, u32 nr, u32 id, u32 mask, + u32 fifo, bool enable) +{ + can_filter_init(canport, nr, true, false, id, mask, fifo, enable); +} + +void can_filter_id_list_16bit_init(u32 canport, u32 nr, u16 id1, u16 id2, + u16 id3, u16 id4, u32 fifo, bool enable) +{ + can_filter_init(canport, nr, false, true, + ((u32)id1 << 16) | (u32)id2, + ((u32)id3 << 16) | (u32)id4, fifo, enable); +} + +void can_filter_id_list_32bit_init(u32 canport, u32 nr, u32 id1, u32 id2, + u32 fifo, bool enable) +{ + can_filter_init(canport, nr, true, true, id1, id2, fifo, enable); +} + +void can_enable_irq(u32 canport, u32 irq) +{ + CAN_IER(canport) |= irq; +} + +void can_disable_irq(u32 canport, u32 irq) +{ + CAN_IER(canport) &= ~irq; +} + +int can_transmit(u32 canport, u32 id, bool ext, bool rtr, u8 length, u8 *data) +{ + int ret = 0, i; + u32 mailbox = 0; + + if ((CAN_TSR(canport) & CAN_TSR_TME0) == CAN_TSR_TME0) { + ret = 0; + mailbox = CAN_MBOX0; + } else if ((CAN_TSR(canport) & CAN_TSR_TME1) == CAN_TSR_TME1) { + ret = 1; + mailbox = CAN_MBOX1; + } else if ((CAN_TSR(canport) & CAN_TSR_TME2) == CAN_TSR_TME2) { + ret = 2; + mailbox = CAN_MBOX2; + } else { + ret = -1; + } + + /* Check if we have an empty mailbox. */ + if (ret == -1) + return ret; + + if (ext) { + /* Set extended ID. */ + CAN_TIxR(canport, mailbox) |= id << CAN_TIxR_EXID_SHIFT; + /* Set extended ID indicator bit. */ + CAN_TIxR(canport, mailbox) |= CAN_TIxR_IDE; + } else { + /* Set standard ID. */ + CAN_TIxR(canport, mailbox) |= id << CAN_TIxR_STID_SHIFT; + /* Unset extended ID indicator bit. */ + CAN_TIxR(canport, mailbox) &= ~CAN_TIxR_IDE; + } + + /* Set/clear remote transmission request bit. */ + if (rtr) + CAN_TIxR(canport, mailbox) |= CAN_TIxR_RTR; /* Set */ + else + CAN_TIxR(canport, mailbox) &= ~CAN_TIxR_RTR; /* Clear */ + + /* Set the DLC. */ + CAN_TDTxR(canport, mailbox) &= 0xFFFFFFFF0; + CAN_TDTxR(canport, mailbox) |= length & CAN_TDTxR_DLC_MASK; + + /* Set the data. */ + CAN_TDLxR(canport, mailbox) = 0; + CAN_TDHxR(canport, mailbox) = 0; + for (i = 0; (i < 4) && (i < length); i++) + CAN_TDLxR(canport, mailbox) |= (u32)data[i] << (8 * i); + for (i = 4; (i < 8) && (i < length); i++) + CAN_TDHxR(canport, mailbox) |= (u32)data[i] << (8 * (i - 4)); + + /* Request transmission. */ + CAN_TIxR(canport, mailbox) |= CAN_TIxR_TXRQ; + + return ret; +} + +void can_fifo_release(u32 canport, u8 fifo) +{ + if (fifo == 0) + CAN_RF0R(canport) |= CAN_RF1R_RFOM1; + else + CAN_RF1R(canport) |= CAN_RF1R_RFOM1; +} + +void can_receive(u32 canport, u8 fifo, bool release, u32 *id, bool *ext, + bool *rtr, u32 *fmi, u8 *length, u8 *data) +{ + u32 fifo_id = 0; + int i; + + if (fifo == 0) + fifo_id = CAN_FIFO0; + else + fifo_id = CAN_FIFO1; + + /* Get type of CAN ID and CAN ID. */ + if (CAN_RIxR(canport, fifo_id) & CAN_RIxR_IDE) { + *ext = true; + /* Get extended CAN ID. */ + *id = ((CAN_RIxR(canport, fifo_id) & CAN_RIxR_EXID_MASK) > + CAN_RIxR_EXID_SHIFT); + } else { + *ext = false; + /* Get standard CAN ID. */ + *id = ((CAN_RIxR(canport, fifo_id) & CAN_RIxR_STID_MASK) > + CAN_RIxR_STID_SHIFT); + } + + /* Get request transmit flag. */ + if (CAN_RIxR(canport, fifo_id) & CAN_RIxR_RTR) + *rtr = true; + else + *rtr = false; + + /* Get filter match ID. */ + *fmi = ((CAN_RDTxR(canport, fifo_id) & CAN_RDTxR_FMI_MASK) > + CAN_RDTxR_FMI_SHIFT); + + /* Get data length. */ + *length = CAN_RDTxR(canport, fifo_id) & CAN_RDTxR_DLC_MASK; + + /* Get data. */ + for (i = 0; (i < 4) && (i < *length); i++) + data[i] = (CAN_RDLxR(canport, fifo_id) >> (8 * i)) & 0xFF; + + for (i = 4; (i < 8) && (i < *length); i++) + data[i] = (CAN_RDHxR(canport, fifo_id) >> (8 * (i - 4))) & 0xFF; + + /* Release the FIFO. */ + if (release) + can_fifo_release(CAN1, 0); +} diff --git a/lib/stm32/dma.c b/lib/stm32/dma.c new file mode 100644 index 0000000..71df580 --- /dev/null +++ b/lib/stm32/dma.c @@ -0,0 +1,543 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2010 Thomas Otto + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include + +void dma_enable_mem2mem_mode(u32 dma, u8 channel) +{ + switch (channel) + { + case 1: + DMA_CCR1(dma) |= DMA_CCR1_MEM2MEM; + DMA_CCR1(dma) &= ~DMA_CCR1_CIRC; + case 2: + DMA_CCR2(dma) |= DMA_CCR2_MEM2MEM; + DMA_CCR2(dma) &= ~DMA_CCR2_CIRC; + case 3: + DMA_CCR3(dma) |= DMA_CCR3_MEM2MEM; + DMA_CCR3(dma) &= ~DMA_CCR3_CIRC; + case 4: + DMA_CCR4(dma) |= DMA_CCR4_MEM2MEM; + DMA_CCR4(dma) &= ~DMA_CCR4_CIRC; + case 5: + DMA_CCR5(dma) |= DMA_CCR5_MEM2MEM; + DMA_CCR5(dma) &= ~DMA_CCR5_CIRC; + case 6: + if (dma == DMA1) { + DMA_CCR6(dma) |= DMA_CCR6_MEM2MEM; + DMA_CCR6(dma) &= ~DMA_CCR6_CIRC; + } + case 7: + if (dma == DMA1) { + DMA_CCR7(dma) |= DMA_CCR7_MEM2MEM; + DMA_CCR7(dma) &= ~DMA_CCR7_CIRC; + } + } +} + + + + +void dma_set_priority(u32 dma, u8 channel, u8 prio) +{ + /* parameter check */ + if (prio > 3) + return; + + switch (channel) + { + case 1: + DMA_CCR1(dma) &= ~(0x3 << DMA_CCR1_PL_LSB); + DMA_CCR1(dma) |= (prio << DMA_CCR1_PL_LSB); + case 2: + DMA_CCR2(dma) &= ~(0x3 << DMA_CCR2_PL_LSB); + DMA_CCR2(dma) |= (prio << DMA_CCR2_PL_LSB); + case 3: + DMA_CCR3(dma) &= ~(0x3 << DMA_CCR3_PL_LSB); + DMA_CCR3(dma) |= (prio << DMA_CCR3_PL_LSB); + case 4: + DMA_CCR4(dma) &= ~(0x3 << DMA_CCR4_PL_LSB); + DMA_CCR4(dma) |= (prio << DMA_CCR4_PL_LSB); + case 5: + DMA_CCR5(dma) &= ~(0x3 << DMA_CCR5_PL_LSB); + DMA_CCR5(dma) |= (prio << DMA_CCR5_PL_LSB); + case 6: + if (dma == DMA1) { + DMA_CCR6(dma) &= ~(0x3 << DMA_CCR6_PL_LSB); + DMA_CCR6(dma) |= (prio << DMA_CCR6_PL_LSB); + } + case 7: + if (dma == DMA1) { + DMA_CCR7(dma) &= ~(0x3 << DMA_CCR7_PL_LSB); + DMA_CCR7(dma) |= (prio << DMA_CCR7_PL_LSB); + } + } +} + +void dma_set_memory_size(u32 dma, u8 channel, u8 mem_size) +{ + /* parameter check */ + if (mem_size > 2) + return; + + switch (channel) + { + case 1: + DMA_CCR1(dma) &= ~(0x3 << DMA_CCR1_MSIZE_LSB); + DMA_CCR1(dma) |= (mem_size << DMA_CCR1_MSIZE_LSB); + case 2: + DMA_CCR2(dma) &= ~(0x3 << DMA_CCR2_MSIZE_LSB); + DMA_CCR2(dma) |= (mem_size << DMA_CCR2_MSIZE_LSB); + case 3: + DMA_CCR3(dma) &= ~(0x3 << DMA_CCR3_MSIZE_LSB); + DMA_CCR3(dma) |= (mem_size << DMA_CCR3_MSIZE_LSB); + case 4: + DMA_CCR4(dma) &= ~(0x3 << DMA_CCR4_MSIZE_LSB); + DMA_CCR4(dma) |= (mem_size << DMA_CCR4_MSIZE_LSB); + case 5: + DMA_CCR5(dma) &= ~(0x3 << DMA_CCR5_MSIZE_LSB); + DMA_CCR5(dma) |= (mem_size << DMA_CCR5_MSIZE_LSB); + case 6: + if (dma == DMA1) { + DMA_CCR6(dma) &= ~(0x3 << DMA_CCR6_MSIZE_LSB); + DMA_CCR6(dma) |= (mem_size << DMA_CCR6_MSIZE_LSB); + } + case 7: + if (dma == DMA1) { + DMA_CCR7(dma) &= ~(0x3 << DMA_CCR7_MSIZE_LSB); + DMA_CCR7(dma) |= (mem_size << DMA_CCR7_MSIZE_LSB); + } + } +} + + + +void dma_set_peripheral_size(u32 dma, u8 channel, u8 peripheral_size) +{ + /* parameter check */ + if (peripheral_size > 2) + return; + + switch (channel) + { + case 1: + DMA_CCR1(dma) &= ~(0x3 << DMA_CCR1_PSIZE_LSB); + DMA_CCR1(dma) |= (peripheral_size << DMA_CCR1_PSIZE_LSB); + case 2: + DMA_CCR2(dma) &= ~(0x3 << DMA_CCR2_PSIZE_LSB); + DMA_CCR2(dma) |= (peripheral_size << DMA_CCR2_PSIZE_LSB); + case 3: + DMA_CCR3(dma) &= ~(0x3 << DMA_CCR3_PSIZE_LSB); + DMA_CCR3(dma) |= (peripheral_size << DMA_CCR3_PSIZE_LSB); + case 4: + DMA_CCR4(dma) &= ~(0x3 << DMA_CCR4_PSIZE_LSB); + DMA_CCR4(dma) |= (peripheral_size << DMA_CCR4_PSIZE_LSB); + case 5: + DMA_CCR5(dma) &= ~(0x3 << DMA_CCR5_PSIZE_LSB); + DMA_CCR5(dma) |= (peripheral_size << DMA_CCR5_PSIZE_LSB); + case 6: + if (dma == DMA1) { + DMA_CCR6(dma) &= ~(0x3 << DMA_CCR6_PSIZE_LSB); + DMA_CCR6(dma) |= (peripheral_size << DMA_CCR6_PSIZE_LSB); + } + case 7: + if (dma == DMA1) { + DMA_CCR7(dma) &= ~(0x3 << DMA_CCR7_PSIZE_LSB); + DMA_CCR7(dma) |= (peripheral_size << DMA_CCR7_PSIZE_LSB); + } + } +} + + +void dma_enable_memory_increment_mode(u32 dma, u8 channel) +{ + switch (channel) + { + case 1: + DMA_CCR1(dma) |= DMA_CCR1_MINC; + case 2: + DMA_CCR2(dma) |= DMA_CCR2_MINC; + case 3: + DMA_CCR3(dma) |= DMA_CCR3_MINC; + case 4: + DMA_CCR4(dma) |= DMA_CCR4_MINC; + case 5: + DMA_CCR5(dma) |= DMA_CCR5_MINC; + case 6: + if (dma == DMA1) + DMA_CCR6(dma) |= DMA_CCR6_MINC; + case 7: + if (dma == DMA1) + DMA_CCR7(dma) |= DMA_CCR7_MINC; + } +} + +void dma_enable_peripheral_increment_mode(u32 dma, u8 channel) +{ + switch (channel) + { + case 1: + DMA_CCR1(dma) |= DMA_CCR1_PINC; + case 2: + DMA_CCR2(dma) |= DMA_CCR2_PINC; + case 3: + DMA_CCR3(dma) |= DMA_CCR3_PINC; + case 4: + DMA_CCR4(dma) |= DMA_CCR4_PINC; + case 5: + DMA_CCR5(dma) |= DMA_CCR5_PINC; + case 6: + if (dma == DMA1) + DMA_CCR6(dma) |= DMA_CCR6_PINC; + case 7: + if (dma == DMA1) + DMA_CCR7(dma) |= DMA_CCR7_PINC; + } +} + +void dma_enable_circular_mode(u32 dma, u8 channel) +{ + switch (channel) + { + case 1: + DMA_CCR1(dma) |= DMA_CCR1_CIRC; + DMA_CCR1(dma) &= ~DMA_CCR1_MEM2MEM; + case 2: + DMA_CCR2(dma) |= DMA_CCR2_CIRC; + DMA_CCR2(dma) &= ~DMA_CCR2_MEM2MEM; + case 3: + DMA_CCR3(dma) |= DMA_CCR3_CIRC; + DMA_CCR3(dma) &= ~DMA_CCR3_MEM2MEM; + case 4: + DMA_CCR4(dma) |= DMA_CCR4_CIRC; + DMA_CCR4(dma) &= ~DMA_CCR4_MEM2MEM; + case 5: + DMA_CCR5(dma) |= DMA_CCR5_CIRC; + DMA_CCR5(dma) &= ~DMA_CCR5_MEM2MEM; + case 6: + if (dma == DMA1) { + DMA_CCR6(dma) |= DMA_CCR6_CIRC; + DMA_CCR6(dma) &= ~DMA_CCR6_MEM2MEM; + } + case 7: + if (dma == DMA1) { + DMA_CCR7(dma) |= DMA_CCR7_CIRC; + DMA_CCR7(dma) &= ~DMA_CCR7_MEM2MEM; + } + } +} + +void dma_set_read_from_peripheral(u32 dma, u8 channel) +{ + switch (channel) + { + case 1: + DMA_CCR1(dma) &= ~DMA_CCR1_DIR; + case 2: + DMA_CCR2(dma) &= ~DMA_CCR2_DIR; + case 3: + DMA_CCR3(dma) &= ~DMA_CCR3_DIR; + case 4: + DMA_CCR4(dma) &= ~DMA_CCR4_DIR; + case 5: + DMA_CCR5(dma) &= ~DMA_CCR5_DIR; + case 6: + if (dma == DMA1) + DMA_CCR6(dma) &= ~DMA_CCR6_DIR; + case 7: + if (dma == DMA1) + DMA_CCR7(dma) &= ~DMA_CCR7_DIR; + } +} + +void dma_set_read_from_memory(u32 dma, u8 channel) +{ + switch (channel) + { + case 1: + DMA_CCR1(dma) |= DMA_CCR1_DIR; + case 2: + DMA_CCR2(dma) |= DMA_CCR2_DIR; + case 3: + DMA_CCR3(dma) |= DMA_CCR3_DIR; + case 4: + DMA_CCR4(dma) |= DMA_CCR4_DIR; + case 5: + DMA_CCR5(dma) |= DMA_CCR5_DIR; + case 6: + if (dma == DMA1) + DMA_CCR6(dma) |= DMA_CCR6_DIR; + case 7: + if (dma == DMA1) + DMA_CCR7(dma) |= DMA_CCR7_DIR; + } +} + +void dma_enable_transfer_error_interrupt(u32 dma, u8 channel) +{ + switch (channel) + { + case 1: + DMA_CCR1(dma) |= DMA_CCR1_TEIE; + case 2: + DMA_CCR2(dma) |= DMA_CCR2_TEIE; + case 3: + DMA_CCR3(dma) |= DMA_CCR3_TEIE; + case 4: + DMA_CCR4(dma) |= DMA_CCR4_TEIE; + case 5: + DMA_CCR5(dma) |= DMA_CCR5_TEIE; + case 6: + if (dma == DMA1) + DMA_CCR6(dma) |= DMA_CCR6_TEIE; + case 7: + if (dma == DMA1) + DMA_CCR7(dma) |= DMA_CCR7_TEIE; + } +} + +void dma_disable_transfer_error_interrupt(u32 dma, u8 channel) +{ + switch (channel) + { + case 1: + DMA_CCR1(dma) &= ~DMA_CCR1_TEIE; + case 2: + DMA_CCR2(dma) &= ~DMA_CCR2_TEIE; + case 3: + DMA_CCR3(dma) &= ~DMA_CCR3_TEIE; + case 4: + DMA_CCR4(dma) &= ~DMA_CCR4_TEIE; + case 5: + DMA_CCR5(dma) &= ~DMA_CCR5_TEIE; + case 6: + if (dma == DMA1) + DMA_CCR6(dma) &= ~DMA_CCR6_TEIE; + case 7: + if (dma == DMA1) + DMA_CCR7(dma) &= ~DMA_CCR7_TEIE; + } +} + +void dma_enable_half_transfer_interrupt(u32 dma, u8 channel) +{ + switch (channel) + { + case 1: + DMA_CCR1(dma) |= DMA_CCR1_HTIE; + case 2: + DMA_CCR2(dma) |= DMA_CCR2_HTIE; + case 3: + DMA_CCR3(dma) |= DMA_CCR3_HTIE; + case 4: + DMA_CCR4(dma) |= DMA_CCR4_HTIE; + case 5: + DMA_CCR5(dma) |= DMA_CCR5_HTIE; + case 6: + if (dma == DMA1) + DMA_CCR6(dma) |= DMA_CCR6_HTIE; + case 7: + if (dma == DMA1) + DMA_CCR7(dma) |= DMA_CCR7_HTIE; + } +} + +void dma_disable_half_transfer_interrupt(u32 dma, u8 channel) +{ + switch (channel) + { + case 1: + DMA_CCR1(dma) &= ~DMA_CCR1_HTIE; + case 2: + DMA_CCR2(dma) &= ~DMA_CCR2_HTIE; + case 3: + DMA_CCR3(dma) &= ~DMA_CCR3_HTIE; + case 4: + DMA_CCR4(dma) &= ~DMA_CCR4_HTIE; + case 5: + DMA_CCR5(dma) &= ~DMA_CCR5_HTIE; + case 6: + if (dma == DMA1) + DMA_CCR6(dma) &= ~DMA_CCR6_HTIE; + case 7: + if (dma == DMA1) + DMA_CCR7(dma) &= ~DMA_CCR7_HTIE; + } +} + +void dma_enable_transfer_complete_interrupt(u32 dma, u8 channel) +{ + switch (channel) + { + case 1: + DMA_CCR1(dma) |= DMA_CCR1_TCIE; + case 2: + DMA_CCR2(dma) |= DMA_CCR2_TCIE; + case 3: + DMA_CCR3(dma) |= DMA_CCR3_TCIE; + case 4: + DMA_CCR4(dma) |= DMA_CCR4_TCIE; + case 5: + DMA_CCR5(dma) |= DMA_CCR5_TCIE; + case 6: + if (dma == DMA1) + DMA_CCR6(dma) |= DMA_CCR6_TCIE; + case 7: + if (dma == DMA1) + DMA_CCR7(dma) |= DMA_CCR7_TCIE; + } +} + +void dma_disable_transfer_complete_interrupt(u32 dma, u8 channel) +{ + switch (channel) + { + case 1: + DMA_CCR1(dma) &= ~DMA_CCR1_TCIE; + case 2: + DMA_CCR2(dma) &= ~DMA_CCR2_TCIE; + case 3: + DMA_CCR3(dma) &= ~DMA_CCR3_TCIE; + case 4: + DMA_CCR4(dma) &= ~DMA_CCR4_TCIE; + case 5: + DMA_CCR5(dma) &= ~DMA_CCR5_TCIE; + case 6: + if (dma == DMA1) + DMA_CCR6(dma) &= ~DMA_CCR6_TCIE; + case 7: + if (dma == DMA1) + DMA_CCR7(dma) &= ~DMA_CCR7_TCIE; + } +} + +void dma_enable_channel(u32 dma, u8 channel) +{ + switch (channel) + { + case 1: + DMA_CCR1(dma) |= DMA_CCR1_EN; + case 2: + DMA_CCR2(dma) |= DMA_CCR2_EN; + case 3: + DMA_CCR3(dma) |= DMA_CCR3_EN; + case 4: + DMA_CCR4(dma) |= DMA_CCR4_EN; + case 5: + DMA_CCR5(dma) |= DMA_CCR5_EN; + case 6: + if (dma == DMA1) + DMA_CCR6(dma) |= DMA_CCR6_EN; + case 7: + if (dma == DMA1) + DMA_CCR7(dma) |= DMA_CCR7_EN; + } +} + +void dma_disable_channel(u32 dma, u8 channel) +{ + switch (channel) + { + case 1: + DMA_CCR1(dma) &= ~DMA_CCR1_EN; + case 2: + DMA_CCR2(dma) &= ~DMA_CCR2_EN; + case 3: + DMA_CCR3(dma) &= ~DMA_CCR3_EN; + case 4: + DMA_CCR4(dma) &= ~DMA_CCR4_EN; + case 5: + DMA_CCR5(dma) &= ~DMA_CCR5_EN; + case 6: + if (dma == DMA1) + DMA_CCR6(dma) &= ~DMA_CCR6_EN; + case 7: + if (dma == DMA1) + DMA_CCR7(dma) &= ~DMA_CCR7_EN; + } +} + +void dma_set_peripheral_address(u32 dma, u8 channel, u32 address) +{ + switch (channel) + { + case 1: + DMA_CPAR1(dma) = (u32)address; + case 2: + DMA_CPAR2(dma) = (u32)address; + case 3: + DMA_CPAR3(dma) = (u32)address; + case 4: + DMA_CPAR4(dma) = (u32)address; + case 5: + DMA_CPAR5(dma) = (u32)address; + case 6: + if (dma == DMA1) + DMA_CPAR6(dma) = (u32)address; + case 7: + if (dma == DMA1) + DMA_CPAR7(dma) = (u32)address; + } +} + +void dma_set_memory_address(u32 dma, u8 channel, u32 address) +{ + switch (channel) + { + case 1: + DMA_CMAR1(dma) = (u32)address; + case 2: + DMA_CMAR2(dma) = (u32)address; + case 3: + DMA_CMAR3(dma) = (u32)address; + case 4: + DMA_CMAR4(dma) = (u32)address; + case 5: + DMA_CMAR5(dma) = (u32)address; + case 6: + if (dma == DMA1) + DMA_CMAR6(dma) = (u32)address; + case 7: + if (dma == DMA1) + DMA_CMAR7(dma) = (u32)address; + } +} + +void dma_set_number_of_data(u32 dma, u8 channel, u16 number) +{ + switch (channel) + { + case 1: + DMA_CNDTR1(dma) = number; + case 2: + DMA_CNDTR2(dma) = number; + case 3: + DMA_CNDTR3(dma) = number; + case 4: + DMA_CNDTR4(dma) = number; + case 5: + DMA_CNDTR5(dma) = number; + case 6: + if (dma == DMA1) + DMA_CNDTR6(dma) = number; + case 7: + if (dma == DMA1) + DMA_CNDTR7(dma) = number; + } +} diff --git a/lib/stm32/ethernet.c b/lib/stm32/ethernet.c new file mode 100644 index 0000000..c1abd03 --- /dev/null +++ b/lib/stm32/ethernet.c @@ -0,0 +1,53 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2010 Gareth McMullin + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include + +void eth_smi_write(u8 phy, u8 reg, u16 data) +{ + /* Set PHY and register addresses for write access. */ + ETH_MACMIIAR &= ~(ETH_MACMIIAR_MR | ETH_MACMIIAR_PA); + ETH_MACMIIAR |= (phy << 11) | (reg << 6) | ETH_MACMIIAR_MW; + + /* Set register value. */ + ETH_MACMIIDR = data; + + /* Begin transaction. */ + ETH_MACMIIAR |= ETH_MACMIIAR_MB; + + /* Wait for not busy. */ + while (ETH_MACMIIAR & ETH_MACMIIAR_MB); +} + +u16 eth_smi_read(u8 phy, u8 reg) +{ + /* Set PHY and register addresses for write access. */ + ETH_MACMIIAR &= ~(ETH_MACMIIAR_MR | ETH_MACMIIAR_PA | + ETH_MACMIIAR_MW); + ETH_MACMIIAR |= (phy << 11) | (reg << 6); + + /* Begin transaction. */ + ETH_MACMIIAR |= ETH_MACMIIAR_MB; + + /* Wait for not busy. */ + while (ETH_MACMIIAR & ETH_MACMIIAR_MB); + + /* Set register value. */ + return (u16)(ETH_MACMIIDR); +} diff --git a/lib/stm32/exti.c b/lib/stm32/exti.c new file mode 100644 index 0000000..df7f4cb --- /dev/null +++ b/lib/stm32/exti.c @@ -0,0 +1,140 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2010 Mark Butler + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include + +void exti_set_trigger(u32 extis, exti_trigger_type trig) +{ + switch (trig) { + case EXTI_TRIGGER_RISING: + EXTI_RTSR |= extis; + EXTI_FTSR &= ~extis; + break; + case EXTI_TRIGGER_FALLING: + EXTI_RTSR &= ~extis; + EXTI_FTSR |= extis; + break; + case EXTI_TRIGGER_BOTH: + EXTI_RTSR |= extis; + EXTI_FTSR |= extis; + break; + } +} + +void exti_enable_request(u32 extis) +{ + /* Enable interrupts. */ + EXTI_IMR |= extis; + + /* Enable events. */ + EXTI_EMR |= extis; +} + +void exti_disable_request(u32 extis) +{ + /* Disable interrupts. */ + EXTI_IMR &= ~extis; + + /* Disable events. */ + EXTI_EMR &= ~extis; +} + +/* + * Reset the interrupt request by writing a 1 to the corresponding + * pending bit register. + */ +void exti_reset_request(u32 extis) +{ + EXTI_PR |= extis; +} + +/* + * Remap an external interrupt line to the corresponding pin on the + * specified GPIO port. + * + * TODO: This could be rewritten in less lines of code. + */ +void exti_select_source(u32 exti, u32 gpioport) +{ + u8 shift, bits; + + shift = bits = 0; + + switch (exti) { + case EXTI0: + case EXTI4: + case EXTI8: + case EXTI12: + shift = 0; + break; + case EXTI1: + case EXTI5: + case EXTI9: + case EXTI13: + shift = 4; + break; + case EXTI2: + case EXTI6: + case EXTI10: + case EXTI14: + shift = 8; + break; + case EXTI3: + case EXTI7: + case EXTI11: + case EXTI15: + shift = 12; + break; + } + + switch (gpioport) { + case GPIOA: + bits = 0xf; + break; + case GPIOB: + bits = 0xe; + break; + case GPIOC: + bits = 0xd; + break; + case GPIOD: + bits = 0xc; + break; + case GPIOE: + bits = 0xb; + break; + case GPIOF: + bits = 0xa; + break; + case GPIOG: + bits = 0x9; + break; + } + + /* Ensure that only valid EXTI lines are used. */ + if (exti < EXTI4) + AFIO_EXTICR1 &= ~(bits << shift); + else if (exti < EXTI8) + AFIO_EXTICR2 &= ~(bits << shift); + else if (exti < EXTI12) + AFIO_EXTICR3 &= ~(bits << shift); + else if (exti < EXTI16) + AFIO_EXTICR4 &= ~(bits << shift); +} diff --git a/lib/stm32/flash.c b/lib/stm32/flash.c new file mode 100644 index 0000000..085aed4 --- /dev/null +++ b/lib/stm32/flash.c @@ -0,0 +1,189 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2010 Thomas Otto + * Copyright (C) 2010 Mark Butler + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include + +void flash_prefetch_buffer_enable(void) +{ + FLASH_ACR |= FLASH_PRFTBE; +} + +void flash_prefetch_buffer_disable(void) +{ + FLASH_ACR &= ~FLASH_PRFTBE; +} + +void flash_halfcycle_enable(void) +{ + FLASH_ACR |= FLASH_HLFCYA; +} + +void flash_halfcycle_disable(void) +{ + FLASH_ACR &= ~FLASH_HLFCYA; +} + +void flash_set_ws(u32 ws) +{ + u32 reg32; + + reg32 = FLASH_ACR; + reg32 &= ~((1 << 0) | (1 << 1) | (1 << 2)); + reg32 |= ws; + FLASH_ACR = reg32; +} + +void flash_unlock(void) +{ + /* Authorize the FPEC access. */ + FLASH_KEYR = FLASH_KEY1; + FLASH_KEYR = FLASH_KEY2; +} + +void flash_lock(void) +{ + FLASH_CR |= FLASH_LOCK; +} + +void flash_clear_pgerr_flag(void) +{ + FLASH_SR |= FLASH_PGERR; +} + +void flash_clear_eop_flag(void) +{ + FLASH_SR |= FLASH_EOP; +} + +void flash_clear_wrprterr_flag(void) +{ + FLASH_SR |= FLASH_WRPRTERR; +} + +void flash_clear_bsy_flag(void) +{ + FLASH_SR &= ~FLASH_BSY; +} + +void flash_clear_status_flags(void) +{ + flash_clear_pgerr_flag(); + flash_clear_eop_flag(); + flash_clear_wrprterr_flag(); + flash_clear_bsy_flag(); +} + +void flash_unlock_option_bytes(void) +{ + FLASH_OPTKEYR = FLASH_KEY1; + FLASH_OPTKEYR = FLASH_KEY2; +} + +void flash_wait_for_last_operation(void) +{ + while ((FLASH_SR & FLASH_BSY) == FLASH_BSY) + ; +} + +void flash_program_word(u32 address, u32 data) +{ + /* Ensure that all flash operations are complete. */ + flash_wait_for_last_operation(); + + /* Enable writes to flash. */ + FLASH_CR |= FLASH_PG; + + /* Program the first half of the word. */ + (*(volatile u16 *)address) = (u16)data; + + /* Wait for the write to complete. */ + flash_wait_for_last_operation(); + + /* Program the second half of the word. */ + (*(volatile u16 *)(address + 2)) = data >> 16; + + /* Wait for the write to complete. */ + flash_wait_for_last_operation(); + + /* Disable writes to flash. */ + FLASH_CR &= ~FLASH_PG; +} + +void flash_program_half_word(u32 address, u16 data) +{ + flash_wait_for_last_operation(); + + FLASH_CR |= FLASH_PG; + + (*(volatile u16 *)address) = data; + + flash_wait_for_last_operation(); + + FLASH_CR &= ~FLASH_PG; /* Disable the PG bit. */ +} + +void flash_erase_page(u32 page_address) +{ + flash_wait_for_last_operation(); + + FLASH_CR |= FLASH_PER; + FLASH_AR = page_address; + FLASH_CR |= FLASH_STRT; + + flash_wait_for_last_operation(); + FLASH_CR &= ~FLASH_PER; +} + +void flash_erase_all_pages(void) +{ + flash_wait_for_last_operation(); + + FLASH_CR |= FLASH_MER; /* Enable mass erase. */ + FLASH_CR |= FLASH_STRT; /* Trigger the erase. */ + + flash_wait_for_last_operation(); + FLASH_CR &= ~FLASH_MER; /* Disable mass erase. */ +} + +void flash_erase_option_bytes(void) +{ + flash_wait_for_last_operation(); + + if ((FLASH_CR & FLASH_OPTWRE) == 0) + flash_unlock_option_bytes(); + + FLASH_CR |= FLASH_OPTER; /* Enable option byte erase. */ + FLASH_CR |= FLASH_STRT; + flash_wait_for_last_operation(); + FLASH_CR &= ~FLASH_OPTER; /* Disable option byte erase. */ +} + +void flash_program_option_bytes(u32 address, u16 data) +{ + flash_wait_for_last_operation(); + + if ((FLASH_CR & FLASH_OPTWRE) == 0) + flash_unlock_option_bytes(); + + FLASH_CR |= FLASH_OPTPG; /* Enable option byte programming. */ + (*(volatile u16 *)address) = data; + flash_wait_for_last_operation(); + FLASH_CR &= ~FLASH_OPTPG; /* Disable option byte programming. */ +} diff --git a/lib/stm32/gpio.c b/lib/stm32/gpio.c new file mode 100644 index 0000000..747977d --- /dev/null +++ b/lib/stm32/gpio.c @@ -0,0 +1,122 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2009 Uwe Hermann + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +/* + * Basic GPIO handling API. + * + * Examples: + * gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ, + * GPIO_CNF_OUTPUT_PUSHPULL, GPIO12); + * gpio_set(GPIOB, GPIO4); + * gpio_clear(GPIOG, GPIO2 | GPIO9); + * gpio_get(GPIOC, GPIO1); + * gpio_toggle(GPIOA, GPIO7); + * reg16 = gpio_port_read(GPIOD); + * gpio_port_write(GPIOF, 0xc8fe); + * + * TODO: + * - GPIO remapping support + */ + +#include + +void gpio_set_mode(u32 gpioport, u8 mode, u8 cnf, u16 gpios) +{ + u16 i, offset = 0; + u32 crl = 0, crh = 0, tmp32 = 0; + + /* + * We want to set the config only for the pins mentioned in gpios, + * but keeping the others, so read out the actual config first. + */ + crl = GPIO_CRL(gpioport); + crh = GPIO_CRH(gpioport); + + /* Iterate over all bits, use i as the bitnumber. */ + for (i = 0; i < 16; i++) { + /* Only set the config if the bit is set in gpios. */ + if (!((1 << i) & gpios)) + continue; + + /* Calculate bit offset. */ + offset = (i < 8) ? (i * 4) : ((i - 8) * 4); + + /* Use tmp32 to either modify crl or crh. */ + tmp32 = (i < 8) ? crl : crh; + + /* Modify bits are needed. */ + tmp32 &= ~(0b1111 << offset); /* Clear the bits first. */ + tmp32 |= (mode << offset) | (cnf << (offset + 2)); + + /* Write tmp32 into crl or crh, leave the other unchanged. */ + crl = (i < 8) ? tmp32 : crl; + crh = (i >= 8) ? tmp32 : crh; + } + + GPIO_CRL(gpioport) = crl; + GPIO_CRH(gpioport) = crh; +} + +void gpio_set(u32 gpioport, u16 gpios) +{ + GPIO_BSRR(gpioport) = gpios; +} + +void gpio_clear(u32 gpioport, u16 gpios) +{ + GPIO_BRR(gpioport) = gpios; +} + +u16 gpio_get(u32 gpioport, u16 gpios) +{ + return gpio_port_read(gpioport) & gpios; +} + +/* TODO: Should work for multiple GPIOs? */ +void gpio_toggle(u32 gpioport, u16 gpio) +{ + if ((gpio_port_read(gpioport) & gpio) == gpio) + gpio_clear(gpioport, gpio); + else + gpio_set(gpioport, gpio); +} + +u16 gpio_port_read(u32 gpioport) +{ + return (u16)GPIO_IDR(gpioport); +} + +void gpio_port_write(u32 gpioport, u16 data) +{ + GPIO_ODR(gpioport) = data; +} + +void gpio_port_config_lock(u32 gpioport, u16 gpios) +{ + u32 reg32; + + /* Special "Lock Key Writing Sequence", see datasheet. */ + GPIO_LCKR(gpioport) = GPIO_LCKK | gpios; /* Set LCKK. */ + GPIO_LCKR(gpioport) = ~GPIO_LCKK & gpios; /* Clear LCKK. */ + GPIO_LCKR(gpioport) = GPIO_LCKK | gpios; /* Set LCKK. */ + reg32 = GPIO_LCKR(gpioport); /* Read LCKK. */ + reg32 = GPIO_LCKR(gpioport); /* Read LCKK again. */ + + /* If (reg32 & GPIO_LCKK) is true, the lock is now active. */ +} diff --git a/lib/stm32/i2c.c b/lib/stm32/i2c.c new file mode 100644 index 0000000..e161b7f --- /dev/null +++ b/lib/stm32/i2c.c @@ -0,0 +1,93 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2010 Thomas Otto + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include + +void i2c_peripheral_enable(u32 i2c) +{ + I2C_CR1(i2c) |= I2C_CR1_PE; +} + +void i2c_peripheral_disable(u32 i2c) +{ + I2C_CR1(i2c) &= ~I2C_CR1_PE; +} + +void i2c_send_start(u32 i2c) +{ + I2C_CR1(i2c) |= I2C_CR1_START; +} + +void i2c_send_stop(u32 i2c) +{ + I2C_CR1(i2c) |= I2C_CR1_STOP; +} + +void i2c_set_own_7bit_slave_address(u32 i2c, u8 slave) +{ + I2C_OAR1(i2c) = (u16)(slave << 1); + I2C_OAR1(i2c) &= ~I2C_OAR1_ADDMODE; + I2C_OAR1(i2c) |= (1 << 14); /* Datasheet: always keep 1 by software. */ +} + +void i2c_set_own_10bit_slave_address(u32 i2c, u16 slave) +{ + I2C_OAR1(i2c) = (u16)(I2C_OAR1_ADDMODE | slave); +} + +void i2c_set_fast_mode(u32 i2c) +{ + I2C_CCR(i2c) |= I2C_CCR_FS; +} + +void i2c_set_standard_mode(u32 i2c) +{ + I2C_CCR(i2c) &= ~I2C_CCR_FS; +} + +void i2c_set_clock_frequency(u32 i2c, u8 freq) +{ + u16 reg16; + reg16 = I2C_CR2(i2c) & 0xffc0; /* Clear bits [5:0]. */ + reg16 |= freq; + I2C_CR2(i2c) = reg16; +} + +void i2c_set_ccr(u32 i2c, u16 freq) +{ + u16 reg16; + reg16 = I2C_CCR(i2c) & 0xf000; /* Clear bits [11:0]. */ + reg16 |= freq; + I2C_CCR(i2c) = reg16; +} + +void i2c_set_trise(u32 i2c, u16 trise) +{ + I2C_TRISE(i2c) = trise; +} + +void i2c_send_7bit_address(u32 i2c, u8 slave, u8 readwrite) +{ + I2C_DR(i2c) = (u8)((slave << 1) | readwrite); +} + +void i2c_send_data(u32 i2c, u8 data) +{ + I2C_DR(i2c) = data; +} diff --git a/lib/stm32/nvic.c b/lib/stm32/nvic.c new file mode 100644 index 0000000..4dffe45 --- /dev/null +++ b/lib/stm32/nvic.c @@ -0,0 +1,106 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2010 Thomas Otto + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include + +void nvic_enable_irq(u8 irqn) +{ + if (irqn < 32) + NVIC_ISER(0) |= (1 << irqn); + if ((irqn >= 32) & (irqn < 64)) + NVIC_ISER(1) |= (1 << (irqn - 32)); + if ((irqn >= 64) & (irqn < 68)) + NVIC_ISER(2) |= (1 << (irqn - 64)); +} + +void nvic_disable_irq(u8 irqn) +{ + if (irqn < 32) + NVIC_ICER(0) |= (1 << irqn); + if ((irqn >= 32) & (irqn < 64)) + NVIC_ICER(1) |= (1 << (irqn - 32)); + if ((irqn >= 64) & (irqn < 68)) + NVIC_ICER(2) |= (1 << (irqn - 64)); +} + +u8 nvic_get_pending_irq(u8 irqn) +{ + if (irqn < 32) + return (NVIC_ISPR(0) & (1 << irqn)); + if ((irqn >= 32) & (irqn < 64)) + return (NVIC_ISPR(1) & (1 << (irqn - 32))); + if ((irqn >= 64) & (irqn < 68)) + return (NVIC_ISPR(2) & (1 << (irqn - 64))); + return 0; +} + +void nvic_set_pending_irq(u8 irqn) +{ + if (irqn < 32) + NVIC_ISPR(0) |= (1 << irqn); + if ((irqn >= 32) & (irqn < 64)) + NVIC_ISPR(1) |= (1 << (irqn - 32)); + if ((irqn >= 64) & (irqn < 68)) + NVIC_ISPR(2) |= (1 << (irqn - 64)); +} + +void nvic_clear_pending_irq(u8 irqn) +{ + if (irqn < 32) + NVIC_ICPR(0) |= (1 << irqn); + if ((irqn >= 32) & (irqn < 64)) + NVIC_ICPR(1) |= (1 << (irqn - 32)); + if ((irqn >= 64) & (irqn < 68)) + NVIC_ICPR(2) |= (1 << (irqn - 64)); +} + +u8 nvic_get_active_irq(u8 irqn) +{ + if (irqn < 32) + return (NVIC_IABR(0) & (1 << irqn)); + if ((irqn >= 32) & (irqn < 64)) + return (NVIC_IABR(1) & (1 << (irqn - 32))); + if ((irqn >= 64) & (irqn < 68)) + return (NVIC_IABR(2) & (1 << (irqn - 64))); + return 0; +} + +u8 nvic_get_irq_enabled(u8 irqn) +{ + if (irqn < 32) + return (NVIC_ISER(0) & (1 << irqn)); + if ((irqn >= 32) & (irqn < 64)) + return (NVIC_ISER(1) & (1 << (irqn - 32))); + if ((irqn >= 64) & (irqn < 68)) + return (NVIC_ISER(2) & (1 << (irqn - 64))); + return 0; +} + +void nvic_set_priority(u8 irqn, u8 priority) +{ + NVIC_IPR(irqn/4) |= (priority << ((irqn % 4) * 8)); +} + +void nvic_generate_software_interrupt(u8 irqn) +{ + if (irqn <= 239) + NVIC_STIR |= irqn; +} + + diff --git a/lib/stm32/rcc.c b/lib/stm32/rcc.c new file mode 100644 index 0000000..dc4dca1 --- /dev/null +++ b/lib/stm32/rcc.c @@ -0,0 +1,542 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2009 Federico Ruiz-Ugalde + * Copyright (C) 2009 Uwe Hermann + * Copyright (C) 2010 Thomas Otto + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include + +void rcc_osc_ready_int_clear(osc_t osc) +{ + switch (osc) { + case PLL: + RCC_CIR |= RCC_CIR_PLLRDYC; + break; + case HSE: + RCC_CIR |= RCC_CIR_HSERDYC; + break; + case HSI: + RCC_CIR |= RCC_CIR_HSIRDYC; + break; + case LSE: + RCC_CIR |= RCC_CIR_LSERDYC; + break; + case LSI: + RCC_CIR |= RCC_CIR_LSIRDYC; + break; + } +} + +void rcc_osc_ready_int_enable(osc_t osc) +{ + switch (osc) { + case PLL: + RCC_CIR |= RCC_CIR_PLLRDYIE; + break; + case HSE: + RCC_CIR |= RCC_CIR_HSERDYIE; + break; + case HSI: + RCC_CIR |= RCC_CIR_HSIRDYIE; + break; + case LSE: + RCC_CIR |= RCC_CIR_LSERDYIE; + break; + case LSI: + RCC_CIR |= RCC_CIR_LSIRDYIE; + break; + } +} + +void rcc_osc_ready_int_disable(osc_t osc) +{ + switch (osc) { + case PLL: + RCC_CIR &= ~RCC_CIR_PLLRDYIE; + break; + case HSE: + RCC_CIR &= ~RCC_CIR_HSERDYIE; + break; + case HSI: + RCC_CIR &= ~RCC_CIR_HSIRDYIE; + break; + case LSE: + RCC_CIR &= ~RCC_CIR_LSERDYIE; + break; + case LSI: + RCC_CIR &= ~RCC_CIR_LSIRDYIE; + break; + } +} + +int rcc_osc_ready_int_flag(osc_t osc) +{ + switch (osc) { + case PLL: + return ((RCC_CIR & RCC_CIR_PLLRDYF) != 0); + break; + case HSE: + return ((RCC_CIR & RCC_CIR_HSERDYF) != 0); + break; + case HSI: + return ((RCC_CIR & RCC_CIR_HSIRDYF) != 0); + break; + case LSE: + return ((RCC_CIR & RCC_CIR_LSERDYF) != 0); + break; + case LSI: + return ((RCC_CIR & RCC_CIR_LSIRDYF) != 0); + break; + } + + /* Shouldn't be reached. */ + return -1; +} + +void rcc_css_int_clear(void) +{ + RCC_CIR |= RCC_CIR_CSSC; +} + +int rcc_css_int_flag(void) +{ + return ((RCC_CIR & RCC_CIR_CSSF) != 0); +} + +void rcc_wait_for_osc_ready(osc_t osc) +{ + switch (osc) { + case PLL: + while ((RCC_CR & RCC_CR_PLLRDY) == 0); + break; + case HSE: + while ((RCC_CR & RCC_CR_HSERDY) == 0); + break; + case HSI: + while ((RCC_CR & RCC_CR_HSIRDY) == 0); + break; + case LSE: + while ((RCC_BDCR & RCC_BDCR_LSERDY) == 0); + break; + case LSI: + while ((RCC_CSR & RCC_CSR_LSIRDY) == 0); + break; + } +} + +void rcc_osc_on(osc_t osc) +{ + switch (osc) { + case PLL: + RCC_CR |= RCC_CR_PLLON; + break; + case HSE: + RCC_CR |= RCC_CR_HSEON; + break; + case HSI: + RCC_CR |= RCC_CR_HSION; + break; + case LSE: + RCC_BDCR |= RCC_BDCR_LSEON; + break; + case LSI: + RCC_CSR |= RCC_CSR_LSION; + break; + } +} + +void rcc_osc_off(osc_t osc) +{ + switch (osc) { + case PLL: + RCC_CR &= ~RCC_CR_PLLON; + break; + case HSE: + RCC_CR &= ~RCC_CR_HSEON; + break; + case HSI: + RCC_CR &= ~RCC_CR_HSION; + break; + case LSE: + RCC_BDCR &= ~RCC_BDCR_LSEON; + break; + case LSI: + RCC_CSR &= ~RCC_CSR_LSION; + break; + } +} + +void rcc_css_enable(void) +{ + RCC_CR |= RCC_CR_CSSON; +} + +void rcc_css_disable(void) +{ + RCC_CR &= ~RCC_CR_CSSON; +} + +void rcc_osc_bypass_enable(osc_t osc) +{ + switch (osc) { + case HSE: + RCC_CR |= RCC_CR_HSEBYP; + break; + case LSE: + RCC_BDCR |= RCC_BDCR_LSEBYP; + break; + case PLL: + case HSI: + case LSI: + /* Do nothing, only HSE/LSE allowed here. */ + break; + } +} + +void rcc_osc_bypass_disable(osc_t osc) +{ + switch (osc) { + case HSE: + RCC_CR &= ~RCC_CR_HSEBYP; + break; + case LSE: + RCC_BDCR &= ~RCC_BDCR_LSEBYP; + break; + case PLL: + case HSI: + case LSI: + /* Do nothing, only HSE/LSE allowed here. */ + break; + } +} + +void rcc_peripheral_enable_clock(volatile u32 *reg, u32 en) +{ + *reg |= en; +} + +void rcc_peripheral_disable_clock(volatile u32 *reg, u32 en) +{ + *reg &= ~en; +} + +void rcc_peripheral_reset(volatile u32 *reg, u32 reset) +{ + *reg |= reset; +} + +void rcc_peripheral_clear_reset(volatile u32 *reg, u32 clear_reset) +{ + *reg &= ~clear_reset; +} + +void rcc_set_sysclk_source(u32 clk) +{ + u32 reg32; + + reg32 = RCC_CFGR; + reg32 &= ~((1 << 1) | (1 << 0)); + RCC_CFGR = (reg32 | clk); +} + +void rcc_set_pll_multiplication_factor(u32 mul) +{ + u32 reg32; + + reg32 = RCC_CFGR; + reg32 &= ~((1 << 21) | (1 << 20) | (1 << 19) | (1 << 18)); + RCC_CFGR = (reg32 | (mul << 18)); +} + +void rcc_set_pll_source(u32 pllsrc) +{ + u32 reg32; + + reg32 = RCC_CFGR; + reg32 &= ~(1 << 16); + RCC_CFGR = (reg32 | (pllsrc << 16)); +} + +void rcc_set_pllxtpre(u32 pllxtpre) +{ + u32 reg32; + + reg32 = RCC_CFGR; + reg32 &= ~(1 << 17); + RCC_CFGR = (reg32 | (pllxtpre << 17)); +} + +void rcc_set_adcpre(u32 adcpre) +{ + u32 reg32; + + reg32 = RCC_CFGR; + reg32 &= ~((1 << 14) | (1 << 15)); + RCC_CFGR = (reg32 | (adcpre << 14)); +} + +void rcc_set_ppre2(u32 ppre2) +{ + u32 reg32; + + reg32 = RCC_CFGR; + reg32 &= ~((1 << 11) | (1 << 12) | (1 << 13)); + RCC_CFGR = (reg32 | (ppre2 << 11)); +} + +void rcc_set_ppre1(u32 ppre1) +{ + u32 reg32; + + reg32 = RCC_CFGR; + reg32 &= ~((1 << 8) | (1 << 9) | (1 << 10)); + RCC_CFGR = (reg32 | (ppre1 << 8)); +} + +void rcc_set_hpre(u32 hpre) +{ + u32 reg32; + + reg32 = RCC_CFGR; + reg32 &= ~((1 << 4) | (1 << 5) | (1 << 6) | (1 << 7)); + RCC_CFGR = (reg32 | (hpre << 4)); +} + +void rcc_set_usbpre(u32 usbpre) +{ + u32 reg32; + + reg32 = RCC_CFGR; + reg32 &= ~(1 << 22); + RCC_CFGR = (reg32 | (usbpre << 22)); +} + +u32 rcc_system_clock_source(void) +{ + /* Return the clock source which is used as system clock. */ + return ((RCC_CFGR & 0x000c) >> 2); +} + +/* + * These functions are setting up the whole clock system for the most common + * input clock and output clock configurations. + */ +void rcc_clock_setup_in_hsi_out_64mhz(void) +{ + /* Enable internal high-speed oscillator. */ + rcc_osc_on(HSI); + rcc_wait_for_osc_ready(HSI); + + /* Select HSI as SYSCLK source. */ + rcc_set_sysclk_source(RCC_CFGR_SW_SYSCLKSEL_HSICLK); + + /* + * Set prescalers for AHB, ADC, ABP1, ABP2. + * Do this before touching the PLL (TODO: why?). + */ + rcc_set_hpre(RCC_CFGR_HPRE_SYSCLK_NODIV); /* Max. 72MHz */ + rcc_set_adcpre(RCC_CFGR_ADCPRE_PCLK2_DIV8); /* Max. 14MHz */ + rcc_set_ppre1(RCC_CFGR_PPRE1_HCLK_DIV2); /* Max. 36MHz */ + rcc_set_ppre2(RCC_CFGR_PPRE2_HCLK_NODIV); /* Max. 72MHz */ + + /* + * Sysclk is running with 64MHz -> 2 waitstates. + * 0WS from 0-24MHz + * 1WS from 24-48MHz + * 2WS from 48-72MHz + */ + flash_set_ws(FLASH_LATENCY_2WS); + + /* + * Set the PLL multiplication factor to 16. + * 8MHz (internal) * 16 (multiplier) / 2 (PLLSRC_HSI_CLK_DIV2) = 64MHz + */ + rcc_set_pll_multiplication_factor(RCC_CFGR_PLLMUL_PLL_CLK_MUL16); + + /* Select HSI/2 as PLL source. */ + rcc_set_pll_source(RCC_CFGR_PLLSRC_HSI_CLK_DIV2); + + /* Enable PLL oscillator and wait for it to stabilize. */ + rcc_osc_on(PLL); + rcc_wait_for_osc_ready(PLL); + + /* Select PLL as SYSCLK source. */ + rcc_set_sysclk_source(RCC_CFGR_SW_SYSCLKSEL_PLLCLK); +} + +void rcc_clock_setup_in_hsi_out_48mhz(void) +{ + /* Enable internal high-speed oscillator. */ + rcc_osc_on(HSI); + rcc_wait_for_osc_ready(HSI); + + /* Select HSI as SYSCLK source. */ + rcc_set_sysclk_source(RCC_CFGR_SW_SYSCLKSEL_HSICLK); + + /* + * Set prescalers for AHB, ADC, ABP1, ABP2. + * Do this before touching the PLL (TODO: why?). + */ + rcc_set_hpre(RCC_CFGR_HPRE_SYSCLK_NODIV); /* Max. 72MHz */ + rcc_set_adcpre(RCC_CFGR_ADCPRE_PCLK2_DIV8); /* Max. 14MHz */ + rcc_set_ppre1(RCC_CFGR_PPRE1_HCLK_DIV2); /* Max. 36MHz */ + rcc_set_ppre2(RCC_CFGR_PPRE2_HCLK_NODIV); /* Max. 72MHz */ + rcc_set_usbpre(RCC_CFGR_USBPRE_PLL_CLK_NODIV); /* 48 MHz */ + + /* + * Sysclk runs with 48MHz -> 1 waitstates. + * 0WS from 0-24MHz + * 1WS from 24-48MHz + * 2WS from 48-72MHz + */ + flash_set_ws(FLASH_LATENCY_1WS); + + /* + * Set the PLL multiplication factor to 12. + * 8MHz (internal) * 12 (multiplier) / 2 (PLLSRC_HSI_CLK_DIV2) = 48MHz + */ + rcc_set_pll_multiplication_factor(RCC_CFGR_PLLMUL_PLL_CLK_MUL12); + + /* Select HSI/2 as PLL source. */ + rcc_set_pll_source(RCC_CFGR_PLLSRC_HSI_CLK_DIV2); + + /* Enable PLL oscillator and wait for it to stabilize. */ + rcc_osc_on(PLL); + rcc_wait_for_osc_ready(PLL); + + /* Select PLL as SYSCLK source. */ + rcc_set_sysclk_source(RCC_CFGR_SW_SYSCLKSEL_PLLCLK); +} + +void rcc_clock_setup_in_hse_8mhz_out_72mhz(void) +{ + /* Enable internal high-speed oscillator. */ + rcc_osc_on(HSI); + rcc_wait_for_osc_ready(HSI); + + /* Select HSI as SYSCLK source. */ + rcc_set_sysclk_source(RCC_CFGR_SW_SYSCLKSEL_HSICLK); + + /* Enable external high-speed oscillator 8MHz. */ + rcc_osc_on(HSE); + rcc_wait_for_osc_ready(HSE); + rcc_set_sysclk_source(RCC_CFGR_SW_SYSCLKSEL_HSECLK); + + /* + * Set prescalers for AHB, ADC, ABP1, ABP2. + * Do this before touching the PLL (TODO: why?). + */ + rcc_set_hpre(RCC_CFGR_HPRE_SYSCLK_NODIV); /* Max. 72MHz */ + rcc_set_adcpre(RCC_CFGR_ADCPRE_PCLK2_DIV8); /* Max. 14MHz */ + rcc_set_ppre1(RCC_CFGR_PPRE1_HCLK_DIV2); /* Max. 36MHz */ + rcc_set_ppre2(RCC_CFGR_PPRE2_HCLK_NODIV); /* Max. 72MHz */ + + /* + * Sysclk runs with 72MHz -> 2 waitstates. + * 0WS from 0-24MHz + * 1WS from 24-48MHz + * 2WS from 48-72MHz + */ + flash_set_ws(FLASH_LATENCY_2WS); + + /* + * Set the PLL multiplication factor to 9. + * 8MHz (external) * 9 (multiplier) = 72MHz + */ + rcc_set_pll_multiplication_factor(RCC_CFGR_PLLMUL_PLL_CLK_MUL9); + + /* Select HSE as PLL source. */ + rcc_set_pll_source(RCC_CFGR_PLLSRC_HSE_CLK); + + /* + * External frequency undivided before entering PLL + * (only valid/needed for HSE). + */ + rcc_set_pllxtpre(RCC_CFGR_PLLXTPRE_HSE_CLK); + + /* Enable PLL oscillator and wait for it to stabilize. */ + rcc_osc_on(PLL); + rcc_wait_for_osc_ready(PLL); + + /* Select PLL as SYSCLK source. */ + rcc_set_sysclk_source(RCC_CFGR_SW_SYSCLKSEL_PLLCLK); +} + +void rcc_clock_setup_in_hse_16mhz_out_72mhz(void) +{ + /* Enable internal high-speed oscillator. */ + rcc_osc_on(HSI); + rcc_wait_for_osc_ready(HSI); + + /* Select HSI as SYSCLK source. */ + rcc_set_sysclk_source(RCC_CFGR_SW_SYSCLKSEL_HSICLK); + + /* Enable external high-speed oscillator 16MHz. */ + rcc_osc_on(HSE); + rcc_wait_for_osc_ready(HSE); + rcc_set_sysclk_source(RCC_CFGR_SW_SYSCLKSEL_HSECLK); + + /* + * Set prescalers for AHB, ADC, ABP1, ABP2. + * Do this before touching the PLL (TODO: why?). + */ + rcc_set_hpre(RCC_CFGR_HPRE_SYSCLK_NODIV); /* Max. 72MHz */ + rcc_set_adcpre(RCC_CFGR_ADCPRE_PCLK2_DIV6); /* Max. 14MHz */ + rcc_set_ppre1(RCC_CFGR_PPRE1_HCLK_DIV2); /* Max. 36MHz */ + rcc_set_ppre2(RCC_CFGR_PPRE2_HCLK_NODIV); /* Max. 72MHz */ + + /* + * Sysclk runs with 72MHz -> 2 waitstates. + * 0WS from 0-24MHz + * 1WS from 24-48MHz + * 2WS from 48-72MHz + */ + flash_set_ws(FLASH_LATENCY_2WS); + + /* + * Set the PLL multiplication factor to 9. + * 16MHz (external) * 9 (multiplier) / 2 (PLLXTPRE_HSE_CLK_DIV2) = 72MHz + */ + rcc_set_pll_multiplication_factor(RCC_CFGR_PLLMUL_PLL_CLK_MUL9); + + /* Select HSI as PLL source. */ + rcc_set_pll_source(RCC_CFGR_PLLSRC_HSE_CLK); + + /* + * Divide external frequency by 2 before entering PLL + * (only valid/needed for HSE). + */ + rcc_set_pllxtpre(RCC_CFGR_PLLXTPRE_HSE_CLK_DIV2); + + /* Enable PLL oscillator and wait for it to stabilize. */ + rcc_osc_on(PLL); + rcc_wait_for_osc_ready(PLL); + + /* Select PLL as SYSCLK source. */ + rcc_set_sysclk_source(RCC_CFGR_SW_SYSCLKSEL_PLLCLK); +} + +void rcc_backupdomain_reset(void) +{ + /* Set the backup domain software reset. */ + RCC_BDCR |= RCC_BDCR_BDRST; + + /* Clear the backup domain software reset. */ + RCC_BDCR &= ~RCC_BDCR_BDRST; +} diff --git a/lib/stm32/rtc.c b/lib/stm32/rtc.c new file mode 100644 index 0000000..604177f --- /dev/null +++ b/lib/stm32/rtc.c @@ -0,0 +1,282 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2010 Uwe Hermann + * Copyright (C) 2010 Lord James + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include +#include + +void rtc_awake_from_off(osc_t clock_source) +{ + u32 reg32; + + /* Enable power and backup interface clocks. */ + RCC_APB1ENR |= (RCC_APB1ENR_PWREN | RCC_APB1ENR_BKPEN); + + /* Enable access to the backup registers and the RTC. */ + PWR_CR |= PWR_CR_DBP; + + /* + * Reset the backup domain, clears everything RTC related. + * If not wanted use the rtc_awake_from_standby() function. + */ + rcc_backupdomain_reset(); + + switch (clock_source) { + case LSE: + /* Turn the LSE on and wait while it stabilises. */ + RCC_BDCR |= RCC_BDCR_LSEON; + while ((reg32 = (RCC_BDCR & RCC_BDCR_LSERDY)) == 0); + + /* Choose LSE as the RTC clock source. */ + RCC_BDCR &= ~((1 << 8) | (1 << 9)); + RCC_BDCR |= (1 << 8); + break; + case LSI: + /* Turn the LSI on and wait while it stabilises. */ + RCC_CSR |= RCC_CSR_LSION; + while ((reg32 = (RCC_CSR & RCC_CSR_LSIRDY)) == 0); + + /* Choose LSI as the RTC clock source. */ + RCC_BDCR &= ~((1 << 8) | (1 << 9)); + RCC_BDCR |= (1 << 9); + break; + case HSE: + /* Turn the HSE on and wait while it stabilises. */ + RCC_CR |= RCC_CR_HSEON; + while ((reg32 = (RCC_CR & RCC_CR_HSERDY)) == 0); + + /* Choose HSE as the RTC clock source. */ + RCC_BDCR &= ~((1 << 8) | (1 << 9)); + RCC_BDCR |= (1 << 9) | (1 << 8); + break; + case PLL: + case HSI: + /* Unusable clock source, here to prevent warnings. */ + /* Turn off clock sources to RTC. */ + RCC_BDCR &= ~((1 << 8) | (1 << 9)); + break; + } + + /* Enable the RTC. */ + RCC_BDCR |= RCC_BDCR_RTCEN; + + /* Wait for the RSF bit in RTC_CRL to be set by hardware. */ + RTC_CRL &= ~RTC_CRL_RSF; + while ((reg32 = (RTC_CRL & RTC_CRL_RSF)) == 0); + + /* Wait for the last write operation to finish. */ + /* TODO: Necessary? */ + while ((reg32 = (RTC_CRL & RTC_CRL_RTOFF)) == 0); +} + +void rtc_enter_config_mode(void) +{ + u32 reg32; + + /* Wait until the RTOFF bit is 1 (no RTC register writes ongoing). */ + while ((reg32 = (RTC_CRL & RTC_CRL_RTOFF)) == 0); + + /* Enter configuration mode. */ + RTC_CRL |= RTC_CRL_CNF; +} + +void rtc_exit_config_mode(void) +{ + /* u32 reg32; */ + + /* Exit configuration mode. */ + RTC_CRL &= ~RTC_CRL_CNF; + + /* Wait until the RTOFF bit is 1 (our RTC register write finished). */ + /* while ((reg32 = (RTC_CRL & RTC_CRL_RTOFF)) == 0); */ + /* TODO: Unnecessary since we poll the bit on config entry(?) */ +} + +void rtc_set_alarm_time(u32 alarm_time) +{ + rtc_enter_config_mode(); + RTC_ALRL = (alarm_time & 0x0000ffff); + RTC_ALRH = (alarm_time & 0xffff0000) >> 16; + rtc_exit_config_mode(); +} + +void rtc_enable_alarm(void) +{ + rtc_enter_config_mode(); + RTC_CRH |= RTC_CRH_ALRIE; + rtc_exit_config_mode(); +} + +void rtc_disable_alarm(void) +{ + rtc_enter_config_mode(); + RTC_CRH &= ~RTC_CRH_ALRIE; + rtc_exit_config_mode(); +} + +void rtc_set_prescale_val(u32 prescale_val) +{ + rtc_enter_config_mode(); + RTC_PRLL = prescale_val & 0x0000ffff; /* PRL[15:0] */ + RTC_PRLH = (prescale_val & 0x000f0000) >> 16; /* PRL[19:16] */ + rtc_exit_config_mode(); +} + +u32 rtc_get_counter_val(void) +{ + return (RTC_CNTH << 16) | RTC_CNTL; +} + +u32 rtc_get_prescale_div_val(void) +{ + return (RTC_DIVH << 16) | RTC_DIVL; +} + +u32 rtc_get_alarm_val(void) +{ + return (RTC_ALRH << 16) | RTC_ALRL; +} + +void rtc_set_counter_val(u32 counter_val) +{ + rtc_enter_config_mode(); + RTC_CNTH = (counter_val & 0xffff0000) >> 16; /* CNT[31:16] */ + RTC_CNTL = counter_val & 0x0000ffff; /* CNT[15:0] */ + rtc_exit_config_mode(); +} + +void rtc_interrupt_enable(rtcflag_t flag_val) +{ + rtc_enter_config_mode(); + + /* Set the correct interrupt enable. */ + switch(flag_val) { + case RTC_SEC: + RTC_CRH |= RTC_CRH_SECIE; + break; + case RTC_ALR: + RTC_CRH |= RTC_CRH_ALRIE; + break; + case RTC_OW: + RTC_CRH |= RTC_CRH_OWIE; + break; + } + + rtc_exit_config_mode(); +} + +void rtc_interrupt_disable(rtcflag_t flag_val) +{ + rtc_enter_config_mode(); + + /* Disable the correct interrupt enable. */ + switch(flag_val) { + case RTC_SEC: + RTC_CRH &= ~RTC_CRH_SECIE; + break; + case RTC_ALR: + RTC_CRH &= ~RTC_CRH_ALRIE; + break; + case RTC_OW: + RTC_CRH &= ~RTC_CRH_OWIE; + break; + } + + rtc_exit_config_mode(); +} + +void rtc_clear_flag(rtcflag_t flag_val) +{ + /* Configuration mode not needed. */ + + /* Clear the correct flag. */ + switch(flag_val) { + case RTC_SEC: + RTC_CRL &= ~RTC_CRL_SECF; + break; + case RTC_ALR: + RTC_CRL &= ~RTC_CRL_ALRF; + break; + case RTC_OW: + RTC_CRL &= ~RTC_CRL_OWF; + break; + } +} + +u32 rtc_check_flag(rtcflag_t flag_val) +{ + u32 reg32; + + /* Read correct flag. */ + switch(flag_val) { + case RTC_SEC: + reg32 = RTC_CRL & RTC_CRL_SECF; + break; + case RTC_ALR: + reg32 = RTC_CRL & RTC_CRL_ALRF; + break; + case RTC_OW: + reg32 = RTC_CRL & RTC_CRL_OWF; + break; + default: + reg32 = 0; + break; + } + + return reg32; +} + +void rtc_awake_from_standby(void) +{ + u32 reg32; + + /* Enable power and backup interface clocks. */ + RCC_APB1ENR |= (RCC_APB1ENR_PWREN | RCC_APB1ENR_BKPEN); + + /* Enable access to the backup registers and the RTC. */ + PWR_CR |= PWR_CR_DBP; + + /* Wait for the RSF bit in RTC_CRL to be set by hardware. */ + RTC_CRL &= ~RTC_CRL_RSF; + while ((reg32 = (RTC_CRL & RTC_CRL_RSF)) == 0); + + /* Wait for the last write operation to finish. */ + /* TODO: Necessary? */ + while ((reg32 = (RTC_CRL & RTC_CRL_RTOFF)) == 0); +} + +void rtc_auto_awake(osc_t clock_source, u32 prescale_val) +{ + u32 reg32; + + /* Enable power and backup interface clocks. */ + RCC_APB1ENR |= (RCC_APB1ENR_PWREN | RCC_APB1ENR_BKPEN); + + /* Enable access to the backup registers and the RTC. */ + /* TODO: Not sure if this is necessary to just read the flag. */ + PWR_CR |= PWR_CR_DBP; + + if ((reg32 = RCC_BDCR & RCC_BDCR_RTCEN) != 0) { + rtc_awake_from_standby(); + } else { + rtc_awake_from_off(clock_source); + rtc_set_prescale_val(prescale_val); + } +} diff --git a/lib/stm32/scb.c b/lib/stm32/scb.c new file mode 100644 index 0000000..d6744a1 --- /dev/null +++ b/lib/stm32/scb.c @@ -0,0 +1,30 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2010 Gareth McMullin + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include + +void scb_reset_core(void) +{ + SCB_AIRCR = SCB_AIRCR_VECTKEY | SCB_AIRCR_VECTRESET; +} + +void scb_reset_system(void) +{ + SCB_AIRCR = SCB_AIRCR_VECTKEY | SCB_AIRCR_SYSRESETREQ; +} diff --git a/lib/stm32/spi.c b/lib/stm32/spi.c new file mode 100644 index 0000000..0acd392 --- /dev/null +++ b/lib/stm32/spi.c @@ -0,0 +1,290 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2009 Uwe Hermann + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include + +/* + * SPI and I2S code. + * + * Examples: + * spi_init_master(SPI1, 1000000, SPI_CR1_CPOL_CLK_TO_0_WHEN_IDLE, + * SPI_CR1_CPHA_CLK_TRANSITION_1, SPI_CR1_DFF_8BIT, + * SPI_CR1_LSBFIRST); + * spi_write(SPI1, 0x55); // 8-bit write + * spi_write(SPI1, 0xaa88); // 16-bit write + * reg8 = spi_read(SPI1); // 8-bit read + * reg16 = spi_read(SPI1); // 16-bit read + */ + +int spi_init_master(u32 spi, u32 br, u32 cpol, u32 cpha, u32 dff, u32 lsbfirst) +{ + u32 reg32 = 0; + + reg32 |= SPI_CR1_MSTR; /* Configure SPI as master. */ + + reg32 |= br; /* Set BAUD rate bits. */ + reg32 |= cpol; /* Set CPOL value. */ + reg32 |= cpha; /* Set CPHA value. */ + reg32 |= dff; /* Set data format (8 or 16 bits). */ + reg32 |= lsbfirst; /* Set frame format (LSB- or MSB-first). */ + + /* TODO: NSS pin handling. */ + + SPI_CR1(spi) = reg32; + + return 0; /* TODO */ +} + +/* TODO: Error handling? */ +void spi_enable(u32 spi) +{ + u32 reg32; + + reg32 = SPI_CR1(spi); + reg32 |= SPI_CR1_SPE; /* Enable SPI. */ + SPI_CR1(spi) = reg32; +} + +/* TODO: Error handling? */ +void spi_disable(u32 spi) +{ + u32 reg32; + + /* TODO: Follow procedure from section 23.3.8 in the techref manual. */ + reg32 = SPI_CR1(spi); + reg32 &= ~(SPI_CR1_SPE); /* Disable SPI. */ + SPI_CR1(spi) = reg32; +} + +void spi_write(u32 spi, u16 data) +{ + /* Write data (8 or 16 bits, depending on DFF) into DR. */ + SPI_DR(spi) = data; +} + +void spi_send(u32 spi, u16 data) +{ + /* Write data (8 or 16 bits, depending on DFF) into DR. */ + SPI_DR(spi) = data; + + /* wait for transfer finished */ + while (SPI_SR(spi) & SPI_SR_BSY ) + { + } +} + +u16 spi_read(u32 spi) +{ + /* Read the data (8 or 16 bits, depending on DFF bit) from DR. */ + return SPI_DR(spi); +} + +void spi_set_bidirectional_mode(u32 spi) +{ + SPI_CR1(spi) |= SPI_CR1_BIDIMODE; +} + +void spi_set_unidirectional_mode(u32 spi) +{ + SPI_CR1(spi) &= ~SPI_CR1_BIDIMODE; +} + +void spi_set_bidirectional_receive_only_mode(u32 spi) +{ + SPI_CR1(spi) |= SPI_CR1_BIDIMODE; + SPI_CR1(spi) &= ~SPI_CR1_BIDIOE; +} + +void spi_set_bidirectional_transmit_only_mode(u32 spi) +{ + SPI_CR1(spi) |= SPI_CR1_BIDIMODE; + SPI_CR1(spi) |= SPI_CR1_BIDIOE; +} + +void spi_enable_crc(u32 spi) +{ + SPI_CR1(spi) |= SPI_CR1_CRCEN; +} + +void spi_disable_crc(u32 spi) +{ + SPI_CR1(spi) &= ~SPI_CR1_CRCEN; +} + +void spi_set_next_tx_from_buffer(u32 spi) +{ + SPI_CR1(spi) &= ~SPI_CR1_CRCNEXT; +} + +void spi_set_next_tx_from_crc(u32 spi) +{ + SPI_CR1(spi) |= SPI_CR1_CRCNEXT; +} + +void spi_set_dff_8bit(u32 spi) +{ + SPI_CR1(spi) &= ~SPI_CR1_DFF; +} + +void spi_set_dff_16bit(u32 spi) +{ + SPI_CR1(spi) |= SPI_CR1_DFF; +} + +void spi_set_full_duplex_mode(u32 spi) +{ + SPI_CR1(spi) &= ~SPI_CR1_RXONLY; +} + +void spi_set_receive_only_mode(u32 spi) +{ + SPI_CR1(spi) |= SPI_CR1_RXONLY; +} + +void spi_disable_software_slave_management(u32 spi) +{ + SPI_CR1(spi) &= ~SPI_CR1_SSM; +} + +void spi_enable_software_slave_management(u32 spi) +{ + SPI_CR1(spi) |= SPI_CR1_SSM; +} + +void spi_set_nss_high(u32 spi) +{ + SPI_CR1(spi) |= SPI_CR1_SSI; +} + +void spi_set_nss_low(u32 spi) +{ + SPI_CR1(spi) &= ~SPI_CR1_SSI; +} + +void spi_send_lsb_first(u32 spi) +{ + SPI_CR1(spi) |= SPI_CR1_LSBFIRST; +} + +void spi_send_msb_first(u32 spi) +{ + SPI_CR1(spi) &= ~SPI_CR1_LSBFIRST; +} + +void spi_set_baudrate_prescaler(u32 spi, u8 baudrate) +{ + u32 reg32; + + if (baudrate > 7) + return; + + reg32 = ( SPI_CR1(spi) & 0xffc7 ); /* clear bits [5:3] */ + reg32 |= (baudrate << 3); + SPI_CR1(spi) = reg32; +} + +void spi_set_master_mode(u32 spi) +{ + SPI_CR1(spi) |= SPI_CR1_MSTR; +} + +void spi_set_slave_mode(u32 spi) +{ + SPI_CR1(spi) &= ~SPI_CR1_MSTR; +} + +void spi_set_clock_polarity_1(u32 spi) +{ + SPI_CR1(spi) |= SPI_CR1_CPOL; +} + +void spi_set_clock_polarity_0(u32 spi) +{ + SPI_CR1(spi) &= ~SPI_CR1_CPOL; +} + +void spi_set_clock_phase_1(u32 spi) +{ + SPI_CR1(spi) |= SPI_CR1_CPHA; +} + +void spi_set_clock_phase_0(u32 spi) +{ + SPI_CR1(spi) &= ~SPI_CR1_CPHA; +} + +void spi_enable_tx_buffer_empty_interrupt(u32 spi) +{ + SPI_CR2(spi) |= SPI_CR2_TXEIE; +} + +void spi_disable_tx_buffer_empty_interrupt(u32 spi) +{ + SPI_CR2(spi) &= ~SPI_CR2_TXEIE; +} + +void spi_enable_rx_buffer_not_empty_interrupt(u32 spi) +{ + SPI_CR2(spi) |= SPI_CR2_RXNEIE; +} + +void spi_disable_rx_buffer_not_empty_interrupt(u32 spi) +{ + SPI_CR2(spi) &= ~SPI_CR2_RXNEIE; +} + +void spi_enable_error_interrupt(u32 spi) +{ + SPI_CR2(spi) |= SPI_CR2_ERRIE; +} + +void spi_disable_error_interrupt(u32 spi) +{ + SPI_CR2(spi) &= ~SPI_CR2_ERRIE; +} + +void spi_enable_ss_output(u32 spi) +{ + SPI_CR2(spi) |= SPI_CR2_SSOE; +} + +void spi_disable_ss_output(u32 spi) +{ + SPI_CR2(spi) &= ~SPI_CR2_SSOE; +} + +void spi_enable_tx_dma(u32 spi) +{ + SPI_CR2(spi) |= SPI_CR2_TXDMAEN; +} + +void spi_disable_tx_dma(u32 spi) +{ + SPI_CR2(spi) &= ~SPI_CR2_TXDMAEN; +} + +void spi_enable_rx_dma(u32 spi) +{ + SPI_CR2(spi) |= SPI_CR2_RXDMAEN; +} + +void spi_disable_rx_dma(u32 spi) +{ + SPI_CR2(spi) &= ~SPI_CR2_RXDMAEN; +} diff --git a/lib/stm32/systick.c b/lib/stm32/systick.c new file mode 100644 index 0000000..fad2253 --- /dev/null +++ b/lib/stm32/systick.c @@ -0,0 +1,64 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2010 Thomas Otto + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include + +void systick_set_reload(u32 value) +{ + STK_LOAD = (value & 0x00FFFFFF); +} + +u32 systick_get_value(void) +{ + return STK_VAL; +} + +void systick_set_clocksource(u8 clocksource) +{ + if (clocksource < 2) + STK_CTRL |= (clocksource << STK_CTRL_CLKSOURCE_LSB); +} + +void systick_interrupt_enable(void) +{ + STK_CTRL |= STK_CTRL_TICKINT; +} + +void systick_interrupt_disable(void) +{ + STK_CTRL &= ~STK_CTRL_TICKINT; +} + +void systick_counter_enable(void) +{ + STK_CTRL |= STK_CTRL_ENABLE; +} + +void systick_counter_disable(void) +{ + STK_CTRL &= ~STK_CTRL_ENABLE; +} + +u8 systick_get_countflag(void) +{ + if (STK_CTRL & STK_CTRL_COUNTFLAG) + return 1; + else + return 0; +} diff --git a/lib/stm32/timer.c b/lib/stm32/timer.c new file mode 100644 index 0000000..e0044f7 --- /dev/null +++ b/lib/stm32/timer.c @@ -0,0 +1,166 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2010 Edward Cheeseman + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +/* + * Basic TIMER handling API. + * + * Examples: + * timer_set_mode(TIM1, TIM_CR1_CKD_CK_INT_MUL_2, + * TIM_CR1_CMS_CENTRE_3, TIM_CR1_DIR_UP); + */ + +#include + +void timer_set_mode(u32 timer_peripheral, u8 clock_div, u8 alignment, + u8 direction) +{ + /* Bad, will reset lots of other stuff. */ + // TIM_CR1(timer_peripheral) = clock_div | alignment | direction; +} + +void timer_set_clock_division(u32 timer_peripheral, u32 clock_div) +{ + clock_div &= TIM_CR1_CKD_CK_INT_MASK; + TIM_CR1(timer_peripheral) &= !TIM_CR1_CKD_CK_INT_MASK; + TIM_CR1(timer_peripheral) |= clock_div; +} + +void timer_enable_preload(u32 timer_peripheral) +{ + TIM_CR1(timer_peripheral) |= TIM_CR1_ARPE; +} + +void timer_disable_preload(u32 timer_peripheral) +{ + TIM_CR1(timer_peripheral) &= !TIM_CR1_ARPE; +} + +void timer_set_alignment(u32 timer_peripheral, u32 alignment) +{ + alignment &= TIM_CR1_CMS_MASK; + TIM_CR1(timer_peripheral) &= ~TIM_CR1_CMS_MASK; + TIM_CR1(timer_peripheral) |= alignment; +} + +void timer_direction_up(u32 timer_peripheral) +{ + TIM_CR1(timer_peripheral) &= ~TIM_CR1_DIR_DOWN; +} + +void timer_direction_down(u32 timer_peripheral) +{ + TIM_CR1(timer_peripheral) |= TIM_CR1_DIR_DOWN; +} + +void timer_one_shot_mode(u32 timer_peripheral) +{ + TIM_CR1(timer_peripheral) |= TIM_CR1_OPM; +} + +void timer_continuous_mode(u32 timer_peripheral) +{ + TIM_CR1(timer_peripheral) &= ~TIM_CR1_OPM; +} + +void timer_update_on_any(u32 timer_peripheral) +{ + TIM_CR1(timer_peripheral) &= ~TIM_CR1_URS; +} + +void timer_update_on_overflow(u32 timer_peripheral) +{ + TIM_CR1(timer_peripheral) |= TIM_CR1_URS; +} + +void timer_enable_update_event(u32 timer_peripheral) +{ + TIM_CR1(timer_peripheral) &= ~TIM_CR1_UDIS; +} + +void timer_disable_update_event(u32 timer_peripheral) +{ + TIM_CR1(timer_peripheral) |= TIM_CR1_UDIS; +} + +void timer_enable_counter(u32 timer_peripheral) +{ + TIM_CR1(timer_peripheral) |= TIM_CR1_CEN; +} + +void timer_disable_counter(u32 timer_peripheral) +{ + TIM_CR1(timer_peripheral) &= ~TIM_CR1_CEN; +} + +void timer_set_output_idle_state(u32 timer_peripheral, u32 outputs) +{ + TIM_CR2(timer_peripheral) |= outputs & TIM_CR2_OIS_MASK; +} + +void timer_reset_output_idle_state(u32 timer_peripheral, u32 outputs) +{ + TIM_CR2(timer_peripheral) &= ~(outputs & TIM_CR2_OIS_MASK); +} + +void timer_set_ti1_ch123_xor(u32 timer_peripheral) +{ + TIM_CR2(timer_peripheral) |= TIM_CR2_TI1S; +} + +void timer_set_ti1_ch1(u32 timer_peripheral) +{ + TIM_CR2(timer_peripheral) &= ~TIM_CR2_TI1S; +} + +void timer_set_master_mode(u32 timer_peripheral, u32 mode) +{ + mode &= mode & TIM_CR2_MASK; + TIM_CR2(timer_peripheral) &= ~TIM_CR2_MMS_MASK; + TIM_CR2(timer_peripheral) |= mode; +} + +void timer_set_dma_on_compare_event(u32 timer_peripheral) +{ + TIM_CR2(timer_peripheral) &= ~TIM_CR2_CCDS; +} + +void timer_set_dma_on_update_event(u32 timer_peripheral) +{ + TIM_CR2(timer_peripheral) |= TIM_CR2_CCDS; +} + +void timer_enable_compare_control_update_on_trigger(u32 timer_peripheral) +{ + TIM_CR2(timer_peripheral) |= TIM_CR2_CCUS; +} + +void timer_disable_compare_control_update_on_trigger(u32 timer_peripheral) +{ + TIM_CR2(timer_peripheral) &= ~TIM_CR2_CCUS; +} + +void timer_enable_preload_complementry_enable_bits(u32 timer_peripheral) +{ + TIM_CR2(timer_peripheral) |= TIM_CR2_CCPC; +} + +void timer_disable_preload_complementry_enable_bits(u32 timer_peripheral) +{ + TIM_CR2(timer_peripheral) &= ~TIM_CR2_CCPC; +} diff --git a/lib/stm32/usart.c b/lib/stm32/usart.c new file mode 100644 index 0000000..6f3905f --- /dev/null +++ b/lib/stm32/usart.c @@ -0,0 +1,120 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2009 Uwe Hermann + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include + +void usart_set_baudrate(u32 usart, u32 baud) +{ + u32 clock = 72000000; /* FIXME: Don't hardcode this clock! */ + + /* TODO: Document and explain calculation. */ + USART_BRR(usart) = (u16)((clock << 4) / (baud * 16)); +} + +void usart_set_databits(u32 usart, u32 bits) +{ + if (bits == 8) + USART_CR1(usart) &= ~USART_CR1_M; /* 8 data bits */ + else + USART_CR1(usart) |= USART_CR1_M; /* 9 data bits */ +} + +void usart_set_stopbits(u32 usart, u32 stopbits) +{ + u32 reg32; + + reg32 = USART_CR2(usart); + reg32 = (reg32 & ~USART_CR2_STOPBITS_MASK) | stopbits; + USART_CR2(usart) = reg32; +} + +void usart_set_parity(u32 usart, u32 parity) +{ + u32 reg32; + + reg32 = USART_CR1(usart); + reg32 = (reg32 & ~USART_PARITY_MASK) | parity; + USART_CR1(usart) = reg32; +} + +void usart_set_mode(u32 usart, u32 mode) +{ + u32 reg32; + + reg32 = USART_CR1(usart); + reg32 = (reg32 & ~USART_MODE_MASK) | mode; + USART_CR1(usart) = reg32; +} + +void usart_set_flow_control(u32 usart, u32 flowcontrol) +{ + u32 reg32; + + reg32 = USART_CR3(usart); + reg32 = (reg32 & ~USART_FLOWCONTROL_MASK) | flowcontrol; + USART_CR3(usart) = reg32; +} + +void usart_enable(u32 usart) +{ + USART_CR1(usart) |= USART_CR1_UE; +} + +void usart_disable(u32 usart) +{ + USART_CR1(usart) &= ~USART_CR1_UE; +} + +void usart_send(u32 usart, u16 data) +{ + /* Send data. */ + USART_DR(usart) = (data & USART_DR_MASK); +} + +u16 usart_recv(u32 usart) +{ + /* Receive data. */ + return USART_DR(usart) & USART_DR_MASK; +} + +void usart_wait_send_ready(u32 usart) +{ + /* Wait until the data has been transferred into the shift register. */ + while ((USART_SR(usart) & USART_SR_TXE) == 0); +} + +void usart_wait_recv_ready(u32 usart) +{ + /* Wait until the data is ready to be received. */ + while ((USART_SR(usart) & USART_SR_RXNE) == 0); +} + +void usart_send_blocking(u32 usart, u16 data) +{ + usart_send(usart, data); + + usart_wait_send_ready(usart); +} + +u16 usart_recv_blocking(u32 usart) +{ + usart_wait_recv_ready(usart); + + return usart_recv(usart); +} -- cgit v1.2.3