From 9b4b4b1c83aa01da140e48c963a2920ed0cfdcc1 Mon Sep 17 00:00:00 2001 From: Uwe Hermann Date: Tue, 2 Mar 2010 10:59:17 +0100 Subject: Add SPI example framework (unfinished). --- examples/stm32-h103/Makefile | 8 +++- examples/stm32-h103/spi/Makefile | 95 ++++++++++++++++++++++++++++++++++++++++ examples/stm32-h103/spi/README | 46 +++++++++++++++++++ examples/stm32-h103/spi/spi.c | 65 +++++++++++++++++++++++++++ examples/stm32-h103/spi/spi.ld | 31 +++++++++++++ 5 files changed, 244 insertions(+), 1 deletion(-) create mode 100644 examples/stm32-h103/spi/Makefile create mode 100644 examples/stm32-h103/spi/README create mode 100644 examples/stm32-h103/spi/spi.c create mode 100644 examples/stm32-h103/spi/spi.ld (limited to 'examples') diff --git a/examples/stm32-h103/Makefile b/examples/stm32-h103/Makefile index 197d52c..eddd0c1 100644 --- a/examples/stm32-h103/Makefile +++ b/examples/stm32-h103/Makefile @@ -39,6 +39,10 @@ usart: @printf " BUILD usart\n" $(Q)$(MAKE) -C usart +spi: + @printf " BUILD spi\n" + $(Q)$(MAKE) -C spi + clean: @printf " CLEAN miniblink\n" $(Q)$(MAKE) -C miniblink clean @@ -46,6 +50,8 @@ clean: $(Q)$(MAKE) -C fancyblink clean @printf " CLEAN usart\n" $(Q)$(MAKE) -C usart clean + @printf " CLEAN spi\n" + $(Q)$(MAKE) -C spi clean -.PHONY: miniblink fancyblink usart clean +.PHONY: miniblink fancyblink usart spi clean diff --git a/examples/stm32-h103/spi/Makefile b/examples/stm32-h103/spi/Makefile new file mode 100644 index 0000000..080ebfc --- /dev/null +++ b/examples/stm32-h103/spi/Makefile @@ -0,0 +1,95 @@ +## +## This file is part of the libopenstm32 project. +## +## Copyright (C) 2010 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 = spi + +# 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 +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).hex" \ + -c "reset" \ + -c "shutdown" $(NULL) + +.PHONY: images clean + diff --git a/examples/stm32-h103/spi/README b/examples/stm32-h103/spi/README new file mode 100644 index 0000000..8b46e7c --- /dev/null +++ b/examples/stm32-h103/spi/README @@ -0,0 +1,46 @@ +------------------------------------------------------------------------------- +README +------------------------------------------------------------------------------- + +This example program repeatedly sends characters on SPI1 on the ST STM32-based +Olimex STM32-H103 eval board (see http://olimex.com/dev/stm32-h103.html +for details). + + +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 STM32-H103 board using OpenOCD: + + $ make flash + +Or you can do the same manually via: + + $ openocd -f interface/jtagkey-tiny.cfg -f board/olimex_stm32_h103.cfg + $ telnet localhost 4444 + > init + > reset halt + > flash write_image erase spi.hex + > reset + +Replace the "jtagkey-tiny.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/stm32-h103/spi/spi.c b/examples/stm32-h103/spi/spi.c new file mode 100644 index 0000000..86bd2a9 --- /dev/null +++ b/examples/stm32-h103/spi/spi.c @@ -0,0 +1,65 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2010 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 . + */ + +#include + +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); +} + +void spi_setup(void) +{ + /* TODO */ +} + +void gpio_setup(void) +{ + /* TODO */ +} + +int main(void) +{ + clock_setup(); + gpio_setup(); + spi_setup(); + + while (1) { + spi_write(SPI1, 0xaa); + spi_write(SPI1, 0x55); + } + + return 0; +} diff --git a/examples/stm32-h103/spi/spi.ld b/examples/stm32-h103/spi/spi.ld new file mode 100644 index 0000000..5ae60b8 --- /dev/null +++ b/examples/stm32-h103/spi/spi.ld @@ -0,0 +1,31 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2010 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