From bcce98da54b047a15ef0abf41e0c7794f29f0439 Mon Sep 17 00:00:00 2001 From: Uwe Hermann Date: Thu, 30 Dec 2010 01:52:44 +0100 Subject: Move STM32 examples to examples/stm32 subdir. --- .../stm32/other/adc_temperature_sensor/Makefile | 23 ++++ examples/stm32/other/adc_temperature_sensor/README | 10 ++ examples/stm32/other/adc_temperature_sensor/adc.c | 147 +++++++++++++++++++++ examples/stm32/other/adc_temperature_sensor/adc.ld | 31 +++++ 4 files changed, 211 insertions(+) create mode 100644 examples/stm32/other/adc_temperature_sensor/Makefile create mode 100644 examples/stm32/other/adc_temperature_sensor/README create mode 100644 examples/stm32/other/adc_temperature_sensor/adc.c create mode 100644 examples/stm32/other/adc_temperature_sensor/adc.ld (limited to 'examples/stm32/other/adc_temperature_sensor') diff --git a/examples/stm32/other/adc_temperature_sensor/Makefile b/examples/stm32/other/adc_temperature_sensor/Makefile new file mode 100644 index 0000000..c5020db --- /dev/null +++ b/examples/stm32/other/adc_temperature_sensor/Makefile @@ -0,0 +1,23 @@ +## +## 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 . +## + +BINARY = adc + +include ../../Makefile.include + diff --git a/examples/stm32/other/adc_temperature_sensor/README b/examples/stm32/other/adc_temperature_sensor/README new file mode 100644 index 0000000..aa00ef0 --- /dev/null +++ b/examples/stm32/other/adc_temperature_sensor/README @@ -0,0 +1,10 @@ +------------------------------------------------------------------------------ +README +------------------------------------------------------------------------------ + +This example program sends some characters on USART1. +Afterwards it read out the internal temperature sensor of the STM32 and +sends the value read out from the ADC to the USART1. + +The terminal settings for the receiving device/PC are 115200 8n1. + diff --git a/examples/stm32/other/adc_temperature_sensor/adc.c b/examples/stm32/other/adc_temperature_sensor/adc.c new file mode 100644 index 0000000..7445399 --- /dev/null +++ b/examples/stm32/other/adc_temperature_sensor/adc.c @@ -0,0 +1,147 @@ +/* + * 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 +#include +#include +#include +#include + +void usart_setup(void) +{ + /* Enable clocks for GPIO port A (for GPIO_USART1_TX) and USART1. */ + rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN); + rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_USART1EN); + + /* Setup GPIO pin GPIO_USART1_TX/GPIO9 on GPIO port A for transmit. */ + gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ, + GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART1_TX); + + /* Setup UART parameters. */ + usart_set_baudrate(USART1, 115200); + usart_set_databits(USART1, 8); + usart_set_stopbits(USART1, USART_STOPBITS_1); + usart_set_mode(USART1, USART_MODE_TX_RX); + usart_set_parity(USART1, USART_PARITY_NONE); + usart_set_flow_control(USART1, USART_FLOWCONTROL_NONE); + + /* Finally enable the USART. */ + usart_enable(USART1); +} + +void gpio_setup(void) +{ + /* Enable GPIOB clock. */ + rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPBEN); + + /* Set GPIO6/7 (in GPIO port B) to 'output push-pull' for the LEDs. */ + gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, + GPIO_CNF_OUTPUT_PUSHPULL, GPIO6); + gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, + GPIO_CNF_OUTPUT_PUSHPULL, GPIO7); +} + +void adc_setup(void) +{ + int i; + rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_ADC1EN); + + /* make shure it didnt run during config */ + adc_off(ADC1); + + /* we configure everything for one single conversion */ + adc_disable_scan_mode(ADC1); + adc_set_single_conversion_mode(ADC1); + adc_enable_discontinous_mode_regular(ADC1); + adc_disable_external_trigger_regular(ADC1); + adc_set_right_aligned(ADC1); + /* we want read out the temperature sensor so we have to enable it */ + adc_enable_temperature_sensor(ADC1); + adc_set_conversion_time_on_all_channels(ADC1, ADC_SMPR_SMP_28DOT5CYC); + + adc_on(ADC1); + /* wait for adc starting up*/ + for (i = 0; i < 80000; i++); /* Wait (needs -O0 CFLAGS). */ + + adc_reset_calibration(ADC1); + adc_calibration(ADC1); +} + +void my_usart_print_int(u32 usart, int value) +{ + s8 i; + u8 nr_digits = 0; + char buffer[25]; + + if (value < 0) { + usart_send(usart, '-'); + value = value * -1; + } + + while (value > 0) { + buffer[nr_digits++] = "0123456789"[value%10]; + value = value/10; + } + + for (i=nr_digits; i>=0; i--) { + usart_send(usart, buffer[i]); + } +} + +int main(void) +{ + u8 channel_array[16]; + u16 temperature; + + rcc_clock_setup_in_hse_16mhz_out_72mhz(); + gpio_setup(); + usart_setup(); + adc_setup(); + + gpio_clear(GPIOB, GPIO7); /* LED1 on */ + gpio_set(GPIOB, GPIO6); /* LED2 off */ + + /* Send a message on USART1. */ + usart_send(USART1, 's'); + usart_send(USART1, 't'); + usart_send(USART1, 'm'); + usart_send(USART1, '\r'); + usart_send(USART1, '\n'); + + /* Select the channel we want to convert. 16=temperature_sensor */ + channel_array[0] = 16; + adc_set_regular_sequence(ADC1, 1, channel_array); + + /* If the ADC_CR2_ON bit is already set -> setting it another time starts the conversion */ + adc_on(ADC1); + + /* Waiting for end of conversion */ + while (!(ADC_SR(ADC1) & ADC_SR_EOC)); + + temperature = ADC_DR(ADC1); + + /* thats actually not the real temparature - you have to compute it like described in the datasheet */ + my_usart_print_int(USART1, temperature); + + gpio_clear(GPIOB, GPIO6); /* LED2 on */ + + while(1); /* Halt. */ + + return 0; +} diff --git a/examples/stm32/other/adc_temperature_sensor/adc.ld b/examples/stm32/other/adc_temperature_sensor/adc.ld new file mode 100644 index 0000000..a1e9de5 --- /dev/null +++ b/examples/stm32/other/adc_temperature_sensor/adc.ld @@ -0,0 +1,31 @@ +/* + * 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 . + */ + +/* Linker script for an STM32F103RBT6 board (128K flash, 20K RAM). */ + +/* Define memory regions. */ +MEMORY +{ + rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K + ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K +} + +/* Include the common ld script from libopenstm32. */ +INCLUDE libopenstm32.ld + -- cgit v1.2.3