From 18097d9ed0ede7f87a55c6373945f6941b007e5c Mon Sep 17 00:00:00 2001 From: Piotr Esden-Tempski Date: Mon, 22 Feb 2010 10:03:56 +0100 Subject: Added pwmleds example for mb252 board. It creates a fading pattern on the 4 leds on the eval board, using TIM3 PWM output, and a gamma correction lookup table. --- examples/mb525/pwmleds/Makefile | 96 +++++++++++++++++ examples/mb525/pwmleds/README | 47 +++++++++ examples/mb525/pwmleds/pwmleds.c | 209 ++++++++++++++++++++++++++++++++++++++ examples/mb525/pwmleds/pwmleds.ld | 31 ++++++ 4 files changed, 383 insertions(+) create mode 100644 examples/mb525/pwmleds/Makefile create mode 100644 examples/mb525/pwmleds/README create mode 100644 examples/mb525/pwmleds/pwmleds.c create mode 100644 examples/mb525/pwmleds/pwmleds.ld (limited to 'examples/mb525/pwmleds') diff --git a/examples/mb525/pwmleds/Makefile b/examples/mb525/pwmleds/Makefile new file mode 100644 index 0000000..0505f13 --- /dev/null +++ b/examples/mb525/pwmleds/Makefile @@ -0,0 +1,96 @@ +## +## 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 = pwmleds + +# PREFIX ?= arm-none-eabi +PREFIX ?= arm-elf +CC = $(PREFIX)-gcc +LD = $(PREFIX)-ld +OBJCOPY = $(PREFIX)-objcopy +OBJDUMP = $(PREFIX)-objdump +# Uncomment this line if you want to use the installed (not local) library. +# TOOLCHAIN_DIR = `dirname \`which $(CC)\``/../$(PREFIX) +TOOLCHAIN_DIR = ../../.. +CFLAGS = -O0 -g -Wall -Wextra -I$(TOOLCHAIN_DIR)/include -fno-common \ + -mcpu=cortex-m3 -mthumb +LDSCRIPT = $(BINARY).ld +LDFLAGS = -L$(TOOLCHAIN_DIR)/lib -T$(LDSCRIPT) -nostartfiles +#LDFLAGS = -T$(LDSCRIPT) -nostartfiles +OBJS = $(BINARY).o + +OPENOCD_BASE = /usr +OPENOCD = $(OPENOCD_BASE)/bin/openocd +OPENOCD_SCRIPTS = $(OPENOCD_BASE)/share/openocd/scripts +OPENOCD_FLASHER = $(OPENOCD_SCRIPTS)/interface/parport.cfg +OPENOCD_BOARD = $(OPENOCD_SCRIPTS)/board/olimex_stm32_h103.cfg + +# Be silent per default, but 'make V=1' will show all compiler calls. +ifneq ($(V),1) +Q := @ +NULL := 2>/dev/null +endif + +all: images + +images: $(BINARY) + @printf " OBJCOPY $(BINARY).bin\n" + $(Q)$(OBJCOPY) -Obinary $(BINARY) $(BINARY).bin + @printf " OBJCOPY $(BINARY).hex\n" + $(Q)$(OBJCOPY) -Oihex $(BINARY) $(BINARY).hex + @printf " OBJCOPY $(BINARY).srec\n" + $(Q)$(OBJCOPY) -Osrec $(BINARY) $(BINARY).srec + @printf " OBJDUMP $(BINARY).list\n" + $(Q)$(OBJDUMP) -S $(BINARY) > $(BINARY).list + +$(BINARY): $(OBJS) $(LDSCRIPT) + @printf " LD $(subst $(shell pwd)/,,$(@))\n" + $(Q)$(LD) $(LDFLAGS) -o $(BINARY) $(OBJS) -lopenstm32 + +%.o: %.c Makefile + @printf " CC $(subst $(shell pwd)/,,$(@))\n" + $(Q)$(CC) $(CFLAGS) -o $@ -c $< + +clean: + @printf " CLEAN $(subst $(shell pwd)/,,$(OBJS))\n" + $(Q)rm -f *.o + @printf " CLEAN $(BINARY)\n" + $(Q)rm -f $(BINARY) + @printf " CLEAN $(BINARY).bin\n" + $(Q)rm -f $(BINARY).bin + @printf " CLEAN $(BINARY).hex\n" + $(Q)rm -f $(BINARY).hex + @printf " CLEAN $(BINARY).srec\n" + $(Q)rm -f $(BINARY).srec + @printf " CLEAN $(BINARY).list\n" + $(Q)rm -f $(BINARY).list + +flash: images + @printf " FLASH $(BINARY).bin\n" + @# IMPORTANT: Don't use "resume", only "reset" will work correctly! + $(Q)$(OPENOCD) -s $(OPENOCD_SCRIPTS) \ + -f $(OPENOCD_FLASHER) \ + -f $(OPENOCD_BOARD) \ + -c "init" -c "reset halt" \ + -c "flash write_image erase $(BINARY).bin 0x08000000" \ + -c "reset" \ + -c "shutdown" $(NULL) + +.PHONY: images clean + diff --git a/examples/mb525/pwmleds/README b/examples/mb525/pwmleds/README new file mode 100644 index 0000000..08ca69d --- /dev/null +++ b/examples/mb525/pwmleds/README @@ -0,0 +1,47 @@ +------------------------------------------------------------------------------ +README +------------------------------------------------------------------------------ + +This is a PWM based led fading example using libopenstm32. + +It's intended for the ST STM32-based MB525 eval board (see +http://www.st.com/stonline/products/literature/um/13472.htm for details). It +should blink the LED on the board. + + +Building +-------- + + $ make + +Running 'make' on the top-level libopenstm32 directory will automatically +also build this example. Or you can build the library "manually" and +then run 'make' in this directory. + +You may want to override the toolchain (e.g., arm-elf or arm-none-eabi): + + $ PREFIX=arm-none-eabi make + +For a more verbose build you can use + + $ make V=1 + + +Flashing +-------- + +You can flash the generated code on the MB525 board using OpenOCD: + + $ make flash + +Or you can do the same manually via: + + $ openocd -f interface/jlink.cfg -f board/olimex_stm32_h103.cfg + $ telnet localhost 4444 + > reset halt + > flash write_image erase pwmleds.bin + > reset + +Replace the "jlink.cfg" with whatever JTAG device you are using, and/or +replace "olimex_stm32_h103.cfg" with your respective board config file. + diff --git a/examples/mb525/pwmleds/pwmleds.c b/examples/mb525/pwmleds/pwmleds.c new file mode 100644 index 0000000..c297f0d --- /dev/null +++ b/examples/mb525/pwmleds/pwmleds.c @@ -0,0 +1,209 @@ +/* + * 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 +#include + +static const uint16_t gamma_table[] = { + 1, 4, 9, 17, 26, 37, 51, 67, + 84, 104, 126, 149, 175, 203, 233, 265, + 299, 334, 372, 412, 454, 499, 545, 593, + 643, 695, 749, 805, 864, 924, 986, 1050, + 1116, 1185, 1255, 1327, 1402, 1478, 1556, 1637, + 1719, 1803, 1890, 1978, 2068, 2161, 2255, 2352, + 2450, 2550, 2653, 2757, 2864, 2972, 3082, 3195, + 3309, 3426, 3544, 3664, 3787, 3911, 4038, 4166, + 4296, 4429, 4563, 4700, 4838, 4978, 5121, 5265, + 5411, 5560, 5710, 5862, 6017, 6173, 6331, 6492, + 6654, 6818, 6985, 7153, 7323, 7495, 7670, 7846, + 8024, 8204, 8387, 8571, 8757, 8945, 9135, 9327, + 9521, 9718, 9916, 10116, 10318, 10522, 10728, 10936, + 11146, 11358, 11572, 11788, 12006, 12226, 12448, 12672, + 12897, 13125, 13355, 13587, 13821, 14057, 14294, 14534, + 14776, 15020, 15265, 15513, 15763, 16014, 16268, 16524, + 16781, 17041, 17302, 17566, 17831, 18099, 18368, 18640, + 18913, 19189, 19466, 19745, 20027, 20310, 20595, 20883, + 21172, 21463, 21756, 22051, 22349, 22648, 22949, 23252, + 23557, 23864, 24173, 24484, 24797, 25112, 25429, 25748, + 26069, 26391, 26716, 27043, 27372, 27702, 28035, 28370, + 28707, 29045, 29386, 29728, 30073, 30419, 30768, 31118, + 31471, 31825, 32182, 32540, 32900, 33263, 33627, 33993, + 34361, 34731, 35104, 35478, 35854, 36232, 36612, 36994, + 37378, 37764, 38152, 38542, 38933, 39327, 39723, 40121, + 40521, 40922, 41326, 41732, 42139, 42549, 42960, 43374, + 43789, 44207, 44626, 45048, 45471, 45896, 46324, 46753, + 47184, 47617, 48052, 48490, 48929, 49370, 49813, 50258, + 50705, 51154, 51604, 52057, 52512, 52969, 53428, 53888, + 54351, 54816, 55282, 55751, 56222, 56694, 57169, 57645, + 58123, 58604, 59086, 59570, 60057, 60545, 61035, 61527, + 62021, 62517, 63016, 63516, 64018, 64521, 65027, 65535 +}; + +/* Set STM32 to 72 MHz. */ +void clock_setup(void) +{ + /* Select HSI as SYSCLK source. */ + rcc_set_sysclk_source(SW_SYSCLKSEL_HSICLK); + + /* Set the PLL multiplication factor to 9. */ + rcc_set_pll_multiplication_factor(PLLMUL_PLL_CLK_MUL9); + + /* Select HSI/2 as PLL source. */ + rcc_set_pll_source(PLLSRC_HSI_CLK_DIV2); + + rcc_set_pllxtpre(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(SW_SYSCLKSEL_PLLCLK); + + /* Enable TIM3 clock. */ + rcc_peripheral_enable_clock(&RCC_APB1ENR, TIM3EN); + + /* Enable GPIOC, Alternate Function clocks. */ + rcc_peripheral_enable_clock(&RCC_APB2ENR, IOPCEN | AFIOEN); + +} + +void gpio_setup(void) +{ + + /* Set GPIO6 (in GPIO port C) to + * 'output alternate function push-pull'. + */ + gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ, + GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO6 | + GPIO7 | + GPIO8 | + GPIO9); + + /* Remap TIM3: + * CH1 -> PC6 + * CH2 -> PC7 + * CH3 -> PC8 + * CH4 -> PC9 + */ + AFIO_MAPR |= AFIO_MAPR_TIM3_REMAP_FULL_REMAP; +} +void tim_setup(void) +{ + /* Clock division and mode */ + TIM3_CR1 = TIM_CR1_CKD_CK_INT | TIM_CR1_CMS_EDGE; + /* Period */ + TIM3_ARR = 65535; + /* Prescaler */ + TIM3_PSC = 0; + TIM3_EGR = TIM_EGR_UG; + + /* ---- */ + /* Output compare 1 mode and preload */ + TIM3_CCMR1 |= TIM_CCMR1_OC1M_PWM1 | TIM_CCMR1_OC1PE; + + /* Polarity and state */ + //TIM3_CCER = TIM_CCER_CC1P | TIM_CCER_CC1E; + TIM3_CCER |= TIM_CCER_CC1E; + + /* Capture compare value */ + TIM3_CCR1 = 0; + + /* ---- */ + /* Output compare 2 mode and preload */ + TIM3_CCMR1 |= TIM_CCMR1_OC2M_PWM1 | TIM_CCMR1_OC2PE; + + /* Polarity and state */ + //TIM3_CCER = TIM_CCER_CC1P | TIM_CCER_CC1E; + TIM3_CCER |= TIM_CCER_CC2E; + + /* Capture compare value */ + TIM3_CCR2 = 0; + + /* ---- */ + /* Output compare 3 mode and preload */ + TIM3_CCMR2 |= TIM_CCMR2_OC3M_PWM1 | TIM_CCMR2_OC3PE; + + /* Polarity and state */ + //TIM3_CCER = TIM_CCER_CC1P | TIM_CCER_CC1E; + TIM3_CCER |= TIM_CCER_CC3E; + + /* Capture compare value */ + TIM3_CCR3 = 0; + + /* ---- */ + /* Output compare 4 mode and preload */ + TIM3_CCMR2 |= TIM_CCMR2_OC4M_PWM1 | TIM_CCMR2_OC4PE; + + /* Polarity and state */ + //TIM3_CCER = TIM_CCER_CC1P | TIM_CCER_CC1E; + TIM3_CCER |= TIM_CCER_CC4E; + + /* Capture compare value */ + TIM3_CCR4 = 0; + + /* ---- */ + /* ARR reload enable */ + TIM3_CR1 |= TIM_CR1_ARPE; + + /* Counter enable */ + TIM3_CR1 |= TIM_CR1_CEN; + +} + +int main(void) +{ + int i, j0, j1, j2, j3, d0, d1, d2, d3; + + clock_setup(); + gpio_setup(); + tim_setup(); + + j0=0; + d0=1; + j1=64; + d1=1; + j2=128; + d2=1; + j3=192; + d3=1; + while (1) + { + TIM3_CCR1= gamma_table[j0]; + j0+=d0; + if(j0==255) d0=-1; + if(j0==0) d0=1; + TIM3_CCR2= gamma_table[j1]; + j1+=d1; + if(j1==255) d1=-1; + if(j1==0) d1=1; + TIM3_CCR3= gamma_table[j2]; + j2+=d2; + if(j2==255) d2=-1; + if(j2==0) d2=1; + TIM3_CCR4= gamma_table[j3]; + j3+=d3; + if(j3==255) d3=-1; + if(j3==0) d3=1; + for(i=0; i< 50000; i++){} + } + + return 0; +} diff --git a/examples/mb525/pwmleds/pwmleds.ld b/examples/mb525/pwmleds/pwmleds.ld new file mode 100644 index 0000000..b3bb9a4 --- /dev/null +++ b/examples/mb525/pwmleds/pwmleds.ld @@ -0,0 +1,31 @@ +/* + * 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 . + */ + +/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 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