Uwe Hermann
16 years ago
5 changed files with 277 additions and 2 deletions
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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 = usart |
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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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OBJS = $(BINARY).o |
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OPENOCD = openocd |
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# Be silent per default, but 'make V=1' will show all compiler calls.
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ifneq ($(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) -f interface/jtagkey-tiny.cfg \
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-f board/olimex_stm32_h103.cfg \
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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" $(NULL) |
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.PHONY: images clean |
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@ -0,0 +1,48 @@ |
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------------------------------------------------------------------------------ |
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README |
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------------------------------------------------------------------------------ |
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This example program sends some characters on USART3 on the ST STM32-based |
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Olimex STM32-H103 eval board (see http://olimex.com/dev/stm32-h103.html |
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for details). |
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The terminal settings for the receiving device/PC are 38400 8n1. |
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Building |
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-------- |
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$ 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 STM32-H103 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/jtagkey-tiny.cfg -f board/olimex_stm32_h103.cfg |
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$ telnet localhost 4444 |
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> init |
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> reset halt |
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> flash write_image erase usart.bin 0x08000000 |
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> reset |
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Replace the "jtagkey-tiny.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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@ -0,0 +1,101 @@ |
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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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#include <libopenstm32.h> |
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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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} |
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void usart_setup(void) |
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{ |
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/* Enable clocks for GPIO port B (for GPIO_USART_TX) and USART3. */ |
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rcc_enable_peripheral_clock(&RCC_APB2ENR, IOPBEN); |
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rcc_enable_peripheral_clock(&RCC_APB1ENR, USART3EN); |
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/* Setup GPIO pin GPIO_USART_TX/GPIO10 on GPIO port B for transmit. */ |
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gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ, |
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GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART_TX); |
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/* Setup UART parameters. */ |
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usart_set_baudrate(USART3, 38400); |
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usart_set_databits(USART3, 8); |
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usart_set_stopbits(USART3, STOPBITS_1); |
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usart_set_mode(USART3, MODE_TX); |
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usart_set_parity(USART3, PARITY_NONE); |
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usart_set_flow_control(USART3, FLOWCONTROL_NONE); |
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/* Finally enable the USART. */ |
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usart_enable(USART3); |
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} |
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void gpio_setup(void) |
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{ |
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/* Enable GPIOC clock. */ |
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rcc_enable_peripheral_clock(&RCC_APB2ENR, IOPCEN); |
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/* Set GPIO12 (in GPIO port C) to 'output push-pull'. */ |
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gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ, |
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GPIO_CNF_OUTPUT_PUSHPULL, GPIO12); |
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} |
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int main(void) |
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{ |
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int i, j = 0, c = 0; |
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clock_setup(); |
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gpio_setup(); |
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usart_setup(); |
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/* Blink the LED (PC12) on the board with every transmitted byte. */ |
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while (1) { |
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gpio_toggle(GPIOC, GPIO12); /* LED on/off */ |
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usart_send(USART3, c + '0'); /* Send one byte on USART3. */ |
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c = (c == 9) ? 0 : c + 1; /* Increment c. */ |
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if ((j++ % 80) == 0) { /* Newline after line full. */ |
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usart_send(USART3, '\r'); |
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usart_send(USART3, '\n'); |
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} |
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for (i = 0; i < 80000; i++); /* Wait (needs -O0 CFLAGS). */ |
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} |
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return 0; |
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} |
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u32 *vector_table[2] __attribute__ ((section(".vectors"))) = { |
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(u32 *)0x20000800, /* Use 2 KB stack (0x800 bytes). */ |
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(u32 *)main, /* Use main() as reset vector for now. */ |
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}; |
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@ -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 |
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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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/* 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 = 0x00000000, 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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