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.
This commit is contained in:
Piotr Esden-Tempski
parent
efb510f526
commit
18097d9ed0
96
examples/mb525/pwmleds/Makefile
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96
examples/mb525/pwmleds/Makefile
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@ -0,0 +1,96 @@
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##
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## This file is part of the libopenstm32 project.
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##
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## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
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##
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## This program is free software: you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program. If not, see <http://www.gnu.org/licenses/>.
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##
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BINARY = pwmleds
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# PREFIX ?= arm-none-eabi
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PREFIX ?= arm-elf
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CC = $(PREFIX)-gcc
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LD = $(PREFIX)-ld
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OBJCOPY = $(PREFIX)-objcopy
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OBJDUMP = $(PREFIX)-objdump
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# Uncomment this line if you want to use the installed (not local) library.
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# TOOLCHAIN_DIR = `dirname \`which $(CC)\``/../$(PREFIX)
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TOOLCHAIN_DIR = ../../..
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CFLAGS = -O0 -g -Wall -Wextra -I$(TOOLCHAIN_DIR)/include -fno-common \
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-mcpu=cortex-m3 -mthumb
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LDSCRIPT = $(BINARY).ld
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LDFLAGS = -L$(TOOLCHAIN_DIR)/lib -T$(LDSCRIPT) -nostartfiles
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#LDFLAGS = -T$(LDSCRIPT) -nostartfiles
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OBJS = $(BINARY).o
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OPENOCD_BASE = /usr
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OPENOCD = $(OPENOCD_BASE)/bin/openocd
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OPENOCD_SCRIPTS = $(OPENOCD_BASE)/share/openocd/scripts
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OPENOCD_FLASHER = $(OPENOCD_SCRIPTS)/interface/parport.cfg
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OPENOCD_BOARD = $(OPENOCD_SCRIPTS)/board/olimex_stm32_h103.cfg
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# Be silent per default, but 'make V=1' will show all compiler calls.
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ifneq ($(V),1)
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Q := @
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NULL := 2>/dev/null
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endif
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all: images
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images: $(BINARY)
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@printf " OBJCOPY $(BINARY).bin\n"
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$(Q)$(OBJCOPY) -Obinary $(BINARY) $(BINARY).bin
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@printf " OBJCOPY $(BINARY).hex\n"
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$(Q)$(OBJCOPY) -Oihex $(BINARY) $(BINARY).hex
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@printf " OBJCOPY $(BINARY).srec\n"
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$(Q)$(OBJCOPY) -Osrec $(BINARY) $(BINARY).srec
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@printf " OBJDUMP $(BINARY).list\n"
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$(Q)$(OBJDUMP) -S $(BINARY) > $(BINARY).list
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$(BINARY): $(OBJS) $(LDSCRIPT)
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@printf " LD $(subst $(shell pwd)/,,$(@))\n"
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$(Q)$(LD) $(LDFLAGS) -o $(BINARY) $(OBJS) -lopenstm32
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%.o: %.c Makefile
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@printf " CC $(subst $(shell pwd)/,,$(@))\n"
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$(Q)$(CC) $(CFLAGS) -o $@ -c $<
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clean:
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@printf " CLEAN $(subst $(shell pwd)/,,$(OBJS))\n"
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$(Q)rm -f *.o
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@printf " CLEAN $(BINARY)\n"
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$(Q)rm -f $(BINARY)
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@printf " CLEAN $(BINARY).bin\n"
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$(Q)rm -f $(BINARY).bin
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@printf " CLEAN $(BINARY).hex\n"
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$(Q)rm -f $(BINARY).hex
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@printf " CLEAN $(BINARY).srec\n"
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$(Q)rm -f $(BINARY).srec
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@printf " CLEAN $(BINARY).list\n"
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$(Q)rm -f $(BINARY).list
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flash: images
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@printf " FLASH $(BINARY).bin\n"
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@# IMPORTANT: Don't use "resume", only "reset" will work correctly!
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$(Q)$(OPENOCD) -s $(OPENOCD_SCRIPTS) \
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-f $(OPENOCD_FLASHER) \
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-f $(OPENOCD_BOARD) \
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-c "init" -c "reset halt" \
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-c "flash write_image erase $(BINARY).bin 0x08000000" \
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-c "reset" \
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-c "shutdown" $(NULL)
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.PHONY: images clean
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47
examples/mb525/pwmleds/README
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47
examples/mb525/pwmleds/README
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------------------------------------------------------------------------------
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README
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------------------------------------------------------------------------------
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This is a PWM based led fading example using libopenstm32.
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It's intended for the ST STM32-based MB525 eval board (see
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http://www.st.com/stonline/products/literature/um/13472.htm for details). It
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should blink the LED on the board.
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Building
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--------
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$ make
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Running 'make' on the top-level libopenstm32 directory will automatically
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also build this example. Or you can build the library "manually" and
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then run 'make' in this directory.
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You may want to override the toolchain (e.g., arm-elf or arm-none-eabi):
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$ PREFIX=arm-none-eabi make
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For a more verbose build you can use
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$ make V=1
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Flashing
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--------
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You can flash the generated code on the MB525 board using OpenOCD:
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$ make flash
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Or you can do the same manually via:
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$ openocd -f interface/jlink.cfg -f board/olimex_stm32_h103.cfg
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$ telnet localhost 4444
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> reset halt
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> flash write_image erase pwmleds.bin
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> reset
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Replace the "jlink.cfg" with whatever JTAG device you are using, and/or
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replace "olimex_stm32_h103.cfg" with your respective board config file.
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209
examples/mb525/pwmleds/pwmleds.c
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209
examples/mb525/pwmleds/pwmleds.c
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@ -0,0 +1,209 @@
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/*
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* This file is part of the libopenstm32 project.
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*
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* Copyright (C) 2010 Piotr Esden-Tempski <piotr@esden.net>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopenstm32/rcc.h>
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#include <libopenstm32/gpio.h>
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#include <libopenstm32/timer.h>
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static const uint16_t gamma_table[] = {
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1, 4, 9, 17, 26, 37, 51, 67,
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84, 104, 126, 149, 175, 203, 233, 265,
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299, 334, 372, 412, 454, 499, 545, 593,
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643, 695, 749, 805, 864, 924, 986, 1050,
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1116, 1185, 1255, 1327, 1402, 1478, 1556, 1637,
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1719, 1803, 1890, 1978, 2068, 2161, 2255, 2352,
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2450, 2550, 2653, 2757, 2864, 2972, 3082, 3195,
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3309, 3426, 3544, 3664, 3787, 3911, 4038, 4166,
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4296, 4429, 4563, 4700, 4838, 4978, 5121, 5265,
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5411, 5560, 5710, 5862, 6017, 6173, 6331, 6492,
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6654, 6818, 6985, 7153, 7323, 7495, 7670, 7846,
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8024, 8204, 8387, 8571, 8757, 8945, 9135, 9327,
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9521, 9718, 9916, 10116, 10318, 10522, 10728, 10936,
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11146, 11358, 11572, 11788, 12006, 12226, 12448, 12672,
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12897, 13125, 13355, 13587, 13821, 14057, 14294, 14534,
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14776, 15020, 15265, 15513, 15763, 16014, 16268, 16524,
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16781, 17041, 17302, 17566, 17831, 18099, 18368, 18640,
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18913, 19189, 19466, 19745, 20027, 20310, 20595, 20883,
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21172, 21463, 21756, 22051, 22349, 22648, 22949, 23252,
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23557, 23864, 24173, 24484, 24797, 25112, 25429, 25748,
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26069, 26391, 26716, 27043, 27372, 27702, 28035, 28370,
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28707, 29045, 29386, 29728, 30073, 30419, 30768, 31118,
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31471, 31825, 32182, 32540, 32900, 33263, 33627, 33993,
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34361, 34731, 35104, 35478, 35854, 36232, 36612, 36994,
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37378, 37764, 38152, 38542, 38933, 39327, 39723, 40121,
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40521, 40922, 41326, 41732, 42139, 42549, 42960, 43374,
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43789, 44207, 44626, 45048, 45471, 45896, 46324, 46753,
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47184, 47617, 48052, 48490, 48929, 49370, 49813, 50258,
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50705, 51154, 51604, 52057, 52512, 52969, 53428, 53888,
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54351, 54816, 55282, 55751, 56222, 56694, 57169, 57645,
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58123, 58604, 59086, 59570, 60057, 60545, 61035, 61527,
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62021, 62517, 63016, 63516, 64018, 64521, 65027, 65535
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};
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/* Set STM32 to 72 MHz. */
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void clock_setup(void)
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{
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/* Select HSI as SYSCLK source. */
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rcc_set_sysclk_source(SW_SYSCLKSEL_HSICLK);
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/* Set the PLL multiplication factor to 9. */
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rcc_set_pll_multiplication_factor(PLLMUL_PLL_CLK_MUL9);
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/* Select HSI/2 as PLL source. */
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rcc_set_pll_source(PLLSRC_HSI_CLK_DIV2);
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rcc_set_pllxtpre(PLLXTPRE_HSE_CLK_DIV2);
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/* Enable PLL oscillator and wait for it to stabilize. */
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rcc_osc_on(PLL);
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rcc_wait_for_osc_ready(PLL);
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/* Select PLL as SYSCLK source. */
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rcc_set_sysclk_source(SW_SYSCLKSEL_PLLCLK);
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/* Enable TIM3 clock. */
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rcc_peripheral_enable_clock(&RCC_APB1ENR, TIM3EN);
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/* Enable GPIOC, Alternate Function clocks. */
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rcc_peripheral_enable_clock(&RCC_APB2ENR, IOPCEN | AFIOEN);
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}
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void gpio_setup(void)
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{
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/* Set GPIO6 (in GPIO port C) to
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* 'output alternate function push-pull'.
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*/
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gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ,
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GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO6 |
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GPIO7 |
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GPIO8 |
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GPIO9);
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/* Remap TIM3:
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* CH1 -> PC6
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* CH2 -> PC7
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* CH3 -> PC8
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* CH4 -> PC9
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*/
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AFIO_MAPR |= AFIO_MAPR_TIM3_REMAP_FULL_REMAP;
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}
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void tim_setup(void)
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{
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/* Clock division and mode */
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TIM3_CR1 = TIM_CR1_CKD_CK_INT | TIM_CR1_CMS_EDGE;
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/* Period */
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TIM3_ARR = 65535;
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/* Prescaler */
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TIM3_PSC = 0;
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TIM3_EGR = TIM_EGR_UG;
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/* ---- */
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/* Output compare 1 mode and preload */
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TIM3_CCMR1 |= TIM_CCMR1_OC1M_PWM1 | TIM_CCMR1_OC1PE;
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/* Polarity and state */
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//TIM3_CCER = TIM_CCER_CC1P | TIM_CCER_CC1E;
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TIM3_CCER |= TIM_CCER_CC1E;
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/* Capture compare value */
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TIM3_CCR1 = 0;
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/* ---- */
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/* Output compare 2 mode and preload */
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TIM3_CCMR1 |= TIM_CCMR1_OC2M_PWM1 | TIM_CCMR1_OC2PE;
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/* Polarity and state */
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//TIM3_CCER = TIM_CCER_CC1P | TIM_CCER_CC1E;
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TIM3_CCER |= TIM_CCER_CC2E;
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/* Capture compare value */
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TIM3_CCR2 = 0;
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/* ---- */
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/* Output compare 3 mode and preload */
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TIM3_CCMR2 |= TIM_CCMR2_OC3M_PWM1 | TIM_CCMR2_OC3PE;
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/* Polarity and state */
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//TIM3_CCER = TIM_CCER_CC1P | TIM_CCER_CC1E;
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TIM3_CCER |= TIM_CCER_CC3E;
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/* Capture compare value */
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TIM3_CCR3 = 0;
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/* ---- */
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/* Output compare 4 mode and preload */
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TIM3_CCMR2 |= TIM_CCMR2_OC4M_PWM1 | TIM_CCMR2_OC4PE;
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/* Polarity and state */
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//TIM3_CCER = TIM_CCER_CC1P | TIM_CCER_CC1E;
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TIM3_CCER |= TIM_CCER_CC4E;
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/* Capture compare value */
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TIM3_CCR4 = 0;
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/* ---- */
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/* ARR reload enable */
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TIM3_CR1 |= TIM_CR1_ARPE;
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/* Counter enable */
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TIM3_CR1 |= TIM_CR1_CEN;
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}
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int main(void)
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{
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int i, j0, j1, j2, j3, d0, d1, d2, d3;
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clock_setup();
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gpio_setup();
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tim_setup();
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j0=0;
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d0=1;
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j1=64;
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d1=1;
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j2=128;
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d2=1;
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j3=192;
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d3=1;
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while (1)
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{
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TIM3_CCR1= gamma_table[j0];
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j0+=d0;
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if(j0==255) d0=-1;
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if(j0==0) d0=1;
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TIM3_CCR2= gamma_table[j1];
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j1+=d1;
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if(j1==255) d1=-1;
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if(j1==0) d1=1;
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TIM3_CCR3= gamma_table[j2];
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j2+=d2;
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if(j2==255) d2=-1;
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if(j2==0) d2=1;
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TIM3_CCR4= gamma_table[j3];
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j3+=d3;
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if(j3==255) d3=-1;
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if(j3==0) d3=1;
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for(i=0; i< 50000; i++){}
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}
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return 0;
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}
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31
examples/mb525/pwmleds/pwmleds.ld
Normal file
31
examples/mb525/pwmleds/pwmleds.ld
Normal file
@ -0,0 +1,31 @@
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/*
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* This file is part of the libopenstm32 project.
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*
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* Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
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*
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* 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
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||||
* 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/>.
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*/
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/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */
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/* Define memory regions. */
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MEMORY
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{
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rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
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ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
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}
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/* Include the common ld script from libopenstm32. */
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INCLUDE libopenstm32.ld
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