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STM32F0 under Linux — Tutorial

Updated April, 2018.

Setting up the ARM GCC toolchain, OpenOCD and ST-Link

This is a tutorial on setting up a complete developing environment on Linux OS by using a free and open tools. The official ARM (GNU Tools for ARM Embedded Processors) GCC toolchain, OpenOCD and Texane's ST-Link debugger/programmer utilities will be used.

Why the ARM Cortex-M0 & why the STM32F0 Family Specifically?

The ARM Cortex-M0 is a 32-bit core that strikes an excellent balance between performance, power usage and price. It may not be as sophisticated and powerful as its older siblings the ARM Cortex-M3 and M4, but its simplicity, ease of use, lower cost and reduced power consumption easily makes up for that. The ARM Cortex-M0 core was designed to compete with other 8-bit/16-bit microcontroller cores like ARM and PIC and it succeeds in this goal on all major fronts; performance, low power, low price and short time to market.

Capacitor code — Guide

Capacitor values are usually standardized: .10, .22, .33, .47 and so on. However, you might occasionally find an unusual value such as 0.15 or 0.27.

The codes below are generally found on ceramic (little round discs), MLCCs, and mylar (chicklet) capacitors, which are not polarized, that is, there are no positive and negative leads.

Usually the first two digits of the code represent part of the value; the third digit corresponds to the number of zeros to be added to the first two digits. This is the value in pF.

VALUE(pF)	CODE

	#include <stdio.h>
	#include <stdint.h>

	uint8_t pack_temp(uint8_t *scratchpad) {

	uint8_t v;

	if ( *(scratchpad + 1) & 0x80 ) {
	*(scratchpad + 1) ^= 0xff;
	*scratchpad ^= 0xff;

	sudo apt-get install dnsmasq pxelinux syslinux-common

	URL=http://www.memtest.org/download/5.01/memtest86+-5.01.bin
	DEST_DIR=~/pxe_memtest

	mkdir -p $DEST_DIR

	cp /usr/lib/PXELINUX/pxelinux.0 $DEST_DIR
	cp /usr/lib/syslinux/modules/bios/ldlinux.c32 $DEST_DIR/

	46.54.226.43
	92.53.140.74
	77.234.148.153

	dns:
	46.54.226.42

	mail.pmcatalyst-ab.com [193.77.182.143]
	mail.pmcatalyst-ac.com [193.77.69.230]
	mail.pmcatalyst-ae.com [193.77.69.222]
	mail.pmcatalyst-af.com [213.250.20.37]
	mail.pmcatalyst-ag.com [193.77.153.28]
	mail.prm-marketing.com [90.157.217.234]
	vs23.zooom.sk [86.110.225.60]
	trolley.laluna.rs [95.85.62.89]

	93.186.202.51

	function GetElementAttribute(e, a) {
	for (var j = 0; e.attributes.length; j++)
	if (e.attributes[j].name == a)
	return e.attributes[j].value;
	}

	for file in `find /usr/share/icons/gnome/`; do
	a=${file#/usr/share/icons/gnome/}
	size=${a%%/*}
	size=${size%x*}
	cat=`echo $a \| cut -d"/" -f2`
	name=${a##*/}
	b=/usr/share/icons/Faenza/$cat/$size/$name
	[ -e "$b" ] && rm $file
	done

	while true;
	do
	x=`digitemp_DS9097 -a -q \| sed -r 's/^.C: ([0-9]+\.[0-9]+) F.$/\1/g'`
	wget --post-data "1=$x" http://10.82.4.23:8000/device/ef85df6a05a6a838/push?sign=t -qO /dev/null
	done

	openocd -f /usr/share/openocd/scripts/interface/stlink-v2-1.cfg -f /usr/share/openocd/scripts/target/stm32f0x_stlink.cfg

	arm-none-eabi-gdb --eval-command="target extended-remote localhost:3333" usb-cdc.elf