ECE271 STM32L4 Discovery Using Linux

This page has resources if you're interested in doing the ECE271 Labs using Linux/gcc/openocd rather than Windows/Keil.

Setting things up

You'll need to install some packages. This is how to do it if you are running Debian Linux.

	sudo apt-get install openocd
	sudo apt-get install gcc-arm-none-eabi
	sudo apt-get install stlink-gui
	sudo apt-get install gcc make git

You will want to install gdb as well. On recent versions of Linux you will want to:

	sudo apt-get install gdb-multiarch

On old machines you would install a different (now discontinued) package:

	sudo apt-get install gdb-arm-none-eabi

On Fedora if you get an error message about stdint.h being missing, installing the arm-none-eabi-newlib package seems to help.

If you want to develop on a Raspberry-Pi, you don't need to cross-compile as you are compiling on another ARM machine. Edit the Makefile to remove the arm-none-eabi- prefixes and things should work.

Building/Uploading

Download the template and you should be able to just do a "make" to build the file.

The Makefile contains a "make flash" target you can run that will automatically run openocd for you to upload things. It runs something like this:

openocd -f board/stm32l4discovery.cfg \
                        -c "program lab1.elf verify" \
                        -c "reset run"

If it's the first time you are programming your board you might need to use the stlink-gui program to clear out the RAM, as the demo program interferes with flashing.

Debugging using gdb/openocd

start openocd
```
openocd -f board/stm32l4discovery.cfg
```
Run gdb. On newer systems use gdb-multiarch
```
gdb-multiarch ./program.elf
```
On older systems you will want to gdb-arm-none-eabi
```
arm-none-eabi-gdb ./program.elf
```

At the prompt connect gdb to openocd

target remote localhost:3333

monitor reset halt

Now standard gdb commads should work, like step and run and x to examine memory.

Lab Template files

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