progranism / stm32f4-gcc-template

A project template for using GCC with the STM32F4Discovery Kit.

This project provides a template for getting up and running with GCC and the STM32F4Discovery kit.

It is also compatible with Eclipse. Set up Eclipse as explained here: http://embeddedprogrammer.blogspot.com/2012/09/stm32f4discovery-development-with-gcc.html

Just disable Makefile generation in the Eclipse project (since we already have a Makefile).

To compile the project: make or for parallel compilation: make -j4

To load the program into the STM32F4: make program

Debugging is accomplished with openocd, which supports the stm32f4discovery natively. Run this to start openocd: openocd-0.6.1.exe -f board/stm32f4discovery.cfg

And then start GDB: arm-none-eabi-gdb build/main.elf

And in GDB: target remote :3333 monitor halt load monitor reset init

Set some breakpoints, etc, and then run the program: continue

NOTE: On Windows, do not install libusb drivers for the ST-Link. Use ST's native drivers. Openocd works just fine with the native drivers. NOTE: On Windows, run arm-none-eabi-gdb from a normal Command Prompt (not within cygwin), otherwise Ctrl+C won't work (it'll close gdb instead of sending SIGINT to the program being debugged).

stm32f4-gcc-template's Issues

Some Linker Issues

Hi!
Maybe I'm doing something wrong, but if I call from main a RCC function such as RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOG, ENABLE);, I get a linkage error, saying
undefined reference toRCC_AHB1PeriphClockCmd'`. Also, Eclipse shows an error symbol next to line 31 from the Makefile https://github.com/progranism/stm32f4-gcc-template/blob/master/Makefile#L31. Could you please enlighten me on where the issue is? Thanks!

fpu should not soft or hard, but softfp

#CFLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16
CFLAGS += -mfloat-abi=soft 
# TODO: hard float was causing an exception; see what's up.

should instead be

CFLAGS += -mfloat-abi=softfp