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authorPiotr Esden-Tempski2010-02-22 10:03:56 +0100
committerPiotr Esden-Tempski2010-02-22 10:03:56 +0100
commit18097d9ed0ede7f87a55c6373945f6941b007e5c (patch)
tree299931a0620772d03d05aeb684b95b66a3bc7a2e /examples/mb525
parentefb510f526c9f6c103d378d9e781c3fca6060c95 (diff)
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.
Diffstat (limited to 'examples/mb525')
-rw-r--r--examples/mb525/pwmleds/Makefile96
-rw-r--r--examples/mb525/pwmleds/README47
-rw-r--r--examples/mb525/pwmleds/pwmleds.c209
-rw-r--r--examples/mb525/pwmleds/pwmleds.ld31
4 files changed, 383 insertions, 0 deletions
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 <uwe@hermann-uwe.de>
+##
+## 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 <http://www.gnu.org/licenses/>.
+##
+
+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 <piotr@esden.net>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopenstm32/rcc.h>
+#include <libopenstm32/gpio.h>
+#include <libopenstm32/timer.h>
+
+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 <uwe@hermann-uwe.de>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+/* 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
+