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authorUwe Hermann2010-03-02 10:59:17 +0100
committerUwe Hermann2010-03-02 10:59:17 +0100
commit9b4b4b1c83aa01da140e48c963a2920ed0cfdcc1 (patch)
tree429216729b36abf38e9006c3a33dee2f53d07da2 /examples
parent742c5951144a3446dc48067f8216b2882bbad363 (diff)
Add SPI example framework (unfinished).
Diffstat (limited to 'examples')
-rw-r--r--examples/stm32-h103/Makefile8
-rw-r--r--examples/stm32-h103/spi/Makefile95
-rw-r--r--examples/stm32-h103/spi/README46
-rw-r--r--examples/stm32-h103/spi/spi.c65
-rw-r--r--examples/stm32-h103/spi/spi.ld31
5 files changed, 244 insertions, 1 deletions
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 <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
+
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 <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;
+}
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 <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
+