miniblink for maple mini.
next thing to do with these miniblinks is work
out how to increase the clock rate using opencm3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Makefile Wed Mar 18 21:50:55 2015 +0000
@@ -0,0 +1,40 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This library is free software: you can redistribute it and/or modify
+## it under the terms of the GNU Lesser General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This library 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 Lesser General Public License for more details.
+##
+## You should have received a copy of the GNU Lesser General Public License
+## along with this library. If not, see <http://www.gnu.org/licenses/>.
+##
+
+PREFIX = /embedded/arm-cortex/gcc-arm-none-eabi-4_9-2014q4/bin/arm-none-eabi
+OPENCM3_DIR = /embedded/arm-cortex
+TTYISP = /dev/ttyCP2102
+
+BINARY = miniblink
+
+LDSCRIPT = STM32F103C8.ld
+
+include mk/Makefile.include
+
+st-flash:$(BINARY).stlink-flash
+
+stm32flash:$(BINARY).bin
+ @printf " FLASH $<\n"
+ stm32flash -w $< -b 115200 -v -g 0 $(TTYISP)
+
+backup:
+ stm32flash -r maple_mini.bin -b 115200 $(TTYISP)
+
+distclean:clean
+ find . -name "*~" -delete
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/README Wed Mar 18 21:50:55 2015 +0000
@@ -0,0 +1,6 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This is the smallest-possible example program using libopencm3.
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/STM32F103C8.ld Wed Mar 18 21:50:55 2015 +0000
@@ -0,0 +1,30 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for STM32F103C8T6 */
+
+/* Define memory regions. */
+MEMORY
+{
+ rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
+ ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32f1.ld
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/miniblink.c Wed Mar 18 21:50:55 2015 +0000
@@ -0,0 +1,47 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+
+static void gpio_setup(void)
+{
+ /* Enable GPIOB clock. */
+ rcc_periph_clock_enable(RCC_GPIOB);
+
+ /* Set GPIO1 (in GPIO port B) to 'output push-pull'. */
+ gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ,
+ GPIO_CNF_OUTPUT_PUSHPULL, GPIO1);
+}
+
+int main(void)
+{
+ int i;
+
+ gpio_setup();
+
+ /* Blink the LED (PB1) on the board. */
+ while (1) {
+ gpio_toggle(GPIOB, GPIO1); /* LED on/off */
+ for (i = 0; i < 0x200000; i++) /* Wait a bit. */
+ __asm__("nop");
+ }
+
+ return 0;
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mk/Makefile.include Wed Mar 18 21:50:55 2015 +0000
@@ -0,0 +1,44 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+## Copyright (C) 2010 Piotr Esden-Tempski <piotr@esden.net>
+##
+## This library is free software: you can redistribute it and/or modify
+## it under the terms of the GNU Lesser General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This library 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 Lesser General Public License for more details.
+##
+## You should have received a copy of the GNU Lesser General Public License
+## along with this library. If not, see <http://www.gnu.org/licenses/>.
+##
+
+LIBNAME = opencm3_stm32f1
+DEFS = -DSTM32F1
+
+FP_FLAGS ?= -msoft-float
+ARCH_FLAGS = -mthumb -mcpu=cortex-m3 $(FP_FLAGS) -mfix-cortex-m3-ldrd
+
+################################################################################
+# OpenOCD specific variables
+
+OOCD ?= openocd
+OOCD_INTERFACE ?= flossjtag
+OOCD_BOARD ?= olimex_stm32_h103
+
+################################################################################
+# Black Magic Probe specific variables
+# Set the BMP_PORT to a serial port and then BMP is used for flashing
+BMP_PORT ?=
+
+################################################################################
+# texane/stlink specific variables
+#STLINK_PORT ?= :4242
+
+
+include mk/Makefile.rules
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mk/Makefile.rules Wed Mar 18 21:50:55 2015 +0000
@@ -0,0 +1,239 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+## Copyright (C) 2010 Piotr Esden-Tempski <piotr@esden.net>
+## Copyright (C) 2013 Frantisek Burian <BuFran@seznam.cz>
+##
+## This library is free software: you can redistribute it and/or modify
+## it under the terms of the GNU Lesser General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This library is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU Lesser General Public License for more details.
+##
+## You should have received a copy of the GNU Lesser General Public License
+## along with this library. If not, see <http://www.gnu.org/licenses/>.
+##
+
+# Be silent per default, but 'make V=1' will show all compiler calls.
+ifneq ($(V),1)
+Q := @
+NULL := 2>/dev/null
+endif
+
+###############################################################################
+# Executables
+
+PREFIX ?= arm-none-eabi
+
+CC := $(PREFIX)-gcc
+CXX := $(PREFIX)-g++
+LD := $(PREFIX)-gcc
+AR := $(PREFIX)-ar
+AS := $(PREFIX)-as
+OBJCOPY := $(PREFIX)-objcopy
+OBJDUMP := $(PREFIX)-objdump
+GDB := $(PREFIX)-gdb
+STFLASH = $(shell which st-flash)
+STYLECHECK := /checkpatch.pl
+STYLECHECKFLAGS := --no-tree -f --terse --mailback
+STYLECHECKFILES := $(shell find . -name '*.[ch]')
+
+
+###############################################################################
+# Source files
+
+LDSCRIPT ?= $(BINARY).ld
+
+OBJS += $(BINARY).o
+
+
+ifeq ($(strip $(OPENCM3_DIR)),)
+# user has not specified the library path, so we try to detect it
+
+# where we search for the library
+LIBPATHS := ./libopencm3 ../../../../libopencm3 ../../../../../libopencm3
+
+OPENCM3_DIR := $(wildcard $(LIBPATHS:=/locm3.sublime-project))
+OPENCM3_DIR := $(firstword $(dir $(OPENCM3_DIR)))
+
+ifeq ($(strip $(OPENCM3_DIR)),)
+$(warning Cannot find libopencm3 library in the standard search paths.)
+$(error Please specify it through OPENCM3_DIR variable!)
+endif
+endif
+
+ifeq ($(V),1)
+$(info Using $(OPENCM3_DIR) path to library)
+endif
+
+INCLUDE_DIR = $(OPENCM3_DIR)/include
+LIB_DIR = $(OPENCM3_DIR)/lib
+SCRIPT_DIR = $(OPENCM3_DIR)/scripts
+
+###############################################################################
+# C flags
+
+CFLAGS += -Os -g
+CFLAGS += -Wextra -Wshadow -Wimplicit-function-declaration
+CFLAGS += -Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes
+CFLAGS += -fno-common -ffunction-sections -fdata-sections
+
+###############################################################################
+# C++ flags
+
+CXXFLAGS += -Os -g
+CXXFLAGS += -Wextra -Wshadow -Wredundant-decls -Weffc++
+CXXFLAGS += -fno-common -ffunction-sections -fdata-sections
+
+###############################################################################
+# C & C++ preprocessor common flags
+
+CPPFLAGS += -MD
+CPPFLAGS += -Wall -Wundef
+CPPFLAGS += -I$(INCLUDE_DIR) $(DEFS)
+
+###############################################################################
+# Linker flags
+
+LDFLAGS += --static -nostartfiles
+LDFLAGS += -L$(LIB_DIR)
+LDFLAGS += -T$(LDSCRIPT)
+LDFLAGS += -Wl,-Map=$(*).map
+LDFLAGS += -Wl,--gc-sections
+ifeq ($(V),99)
+LDFLAGS += -Wl,--print-gc-sections
+endif
+
+###############################################################################
+# Used libraries
+
+LDLIBS += -l$(LIBNAME)
+LDLIBS += -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group
+
+###############################################################################
+###############################################################################
+###############################################################################
+
+.SUFFIXES: .elf .bin .hex .srec .list .map .images
+.SECONDEXPANSION:
+.SECONDARY:
+
+all: elf
+
+elf: $(BINARY).elf
+bin: $(BINARY).bin
+hex: $(BINARY).hex
+srec: $(BINARY).srec
+list: $(BINARY).list
+
+images: $(BINARY).images
+flash: $(BINARY).flash
+
+%.images: %.bin %.hex %.srec %.list %.map
+ @#printf "*** $* images generated ***\n"
+
+%.bin: %.elf
+ @#printf " OBJCOPY $(*).bin\n"
+ $(Q)$(OBJCOPY) -Obinary $(*).elf $(*).bin
+
+%.hex: %.elf
+ @#printf " OBJCOPY $(*).hex\n"
+ $(Q)$(OBJCOPY) -Oihex $(*).elf $(*).hex
+
+%.srec: %.elf
+ @#printf " OBJCOPY $(*).srec\n"
+ $(Q)$(OBJCOPY) -Osrec $(*).elf $(*).srec
+
+%.list: %.elf
+ @#printf " OBJDUMP $(*).list\n"
+ $(Q)$(OBJDUMP) -S $(*).elf > $(*).list
+
+%.elf %.map: $(OBJS) $(LDSCRIPT) $(LIB_DIR)/lib$(LIBNAME).a
+ @#printf " LD $(*).elf\n"
+ $(Q)$(LD) $(LDFLAGS) $(ARCH_FLAGS) $(OBJS) $(LDLIBS) -o $(*).elf
+
+%.o: %.c
+ @#printf " CC $(*).c\n"
+ $(Q)$(CC) $(CFLAGS) $(CPPFLAGS) $(ARCH_FLAGS) -o $(*).o -c $(*).c
+
+%.o: %.cxx
+ @#printf " CXX $(*).cxx\n"
+ $(Q)$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(ARCH_FLAGS) -o $(*).o -c $(*).cxx
+
+%.o: %.cpp
+ @#printf " CXX $(*).cpp\n"
+ $(Q)$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(ARCH_FLAGS) -o $(*).o -c $(*).cpp
+
+clean:
+ @#printf " CLEAN\n"
+ $(Q)$(RM) *.o *.d *.elf *.bin *.hex *.srec *.list *.map
+
+stylecheck: $(STYLECHECKFILES:=.stylecheck)
+styleclean: $(STYLECHECKFILES:=.styleclean)
+
+# the cat is due to multithreaded nature - we like to have consistent chunks of text on the output
+%.stylecheck: %
+ $(Q)$(SCRIPT_DIR)$(STYLECHECK) $(STYLECHECKFLAGS) $* > $*.stylecheck; \
+ if [ -s $*.stylecheck ]; then \
+ cat $*.stylecheck; \
+ else \
+ rm -f $*.stylecheck; \
+ fi;
+
+%.styleclean:
+ $(Q)rm -f $*.stylecheck;
+
+
+%.stlink-flash: %.bin
+ @printf " FLASH $<\n"
+ $(Q)$(STFLASH) write $(*).bin 0x8000000
+
+ifeq ($(STLINK_PORT),)
+ifeq ($(BMP_PORT),)
+ifeq ($(OOCD_SERIAL),)
+%.flash: %.hex
+ @printf " FLASH $<\n"
+ @# IMPORTANT: Don't use "resume", only "reset" will work correctly!
+ $(Q)$(OOCD) -f interface/$(OOCD_INTERFACE).cfg \
+ -f board/$(OOCD_BOARD).cfg \
+ -c "init" -c "reset init" \
+ -c "flash write_image erase $(*).hex" \
+ -c "reset" \
+ -c "shutdown" $(NULL)
+else
+%.flash: %.hex
+ @printf " FLASH $<\n"
+ @# IMPORTANT: Don't use "resume", only "reset" will work correctly!
+ $(Q)$(OOCD) -f interface/$(OOCD_INTERFACE).cfg \
+ -f board/$(OOCD_BOARD).cfg \
+ -c "ft2232_serial $(OOCD_SERIAL)" \
+ -c "init" -c "reset init" \
+ -c "flash write_image erase $(*).hex" \
+ -c "reset" \
+ -c "shutdown" $(NULL)
+endif
+else
+%.flash: %.elf
+ @printf " GDB $(*).elf (flash)\n"
+ $(Q)$(GDB) --batch \
+ -ex 'target extended-remote $(BMP_PORT)' \
+ -x $(SCRIPT_DIR)/black_magic_probe_flash.scr \
+ $(*).elf
+endif
+else
+%.flash: %.elf
+ @printf " GDB $(*).elf (flash)\n"
+ $(Q)$(GDB) --batch \
+ -ex 'target extended-remote $(STLINK_PORT)' \
+ -x $(SCRIPT_DIR)/stlink_flash.scr \
+ $(*).elf
+endif
+
+.PHONY: images clean stylecheck styleclean elf bin hex srec list
+
+-include $(OBJS:.o=.d)