Add SPI example framework (unfinished).

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
 

examples/stm32-h103/spi/Makefile

@@ -0,0 +1,95 @@
+##
+## This file is part of the libopenstm32 project.
+##
+## Copyright (C) 2010 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		= 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
+

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.
+

examples/stm32-h103/spi/spi.c

@@ -0,0 +1,65 @@
+/*
+ * This file is part of the libopenstm32 project.
+ *
+ * Copyright (C) 2010 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/>.
+ */
+
+#include <libopenstm32.h>
+
+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;
+}

examples/stm32-h103/spi/spi.ld

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopenstm32 project.
+ *
+ * Copyright (C) 2010 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
+