Bare metal programming of Infeneon XMC4500

This project is for programming an XMC4500 RelaxKit Lite board using only gcc and some Jlink tools. The XMC4500 RelaxKit Lite is a nice board which at €10 is great value, 120KB RAM, 1MB flash and 120MHz Cortex-M4F core.

Necessary tools are:

JLink tools from Segger for talking to the debug chip and flash the code https://www.segger.com/jlink-software-beta-version.html

GCC crosscompilation toolchain https://launchpad.net/gcc-arm-embedded

I use Geany for editing, running make commands from inside the editor. I have not tried to use the project features of Geany, for me a project is simply defined by a makefile and some sourcefiles in a folder. This setup works well on MacOSX and Fedora.

This is the bare blink and read a button example. The files used are

Makefile Path to arm-none-eabi toolchain must be set flash_XMC4500-1024.ld linkerfile flash.jlink Command script for JLinkExe to write program to flash

core_cm4.h CMSIS definitions for the Cortex-M4F core core_cm4_simd.h core_cmFunc.h core_cmInstr.h

vectorsxmc4500.c Interrupt vectors startup.c Reset handler /* Note revision AA and AB of the processor has a bug and the Infeneon startup_XMC4500.S must be used / / The latest boards I bought has revision AC of the processor / / Update this is not an issue if both normal code and interrupts use main stack pointer MSP */

System_XMC4500.c/h Clock and lowlevel initialisation (Infenieon code from DAVE, I plan to rewrite them) syscalls.c some function stubs to make the C library happy uc_id.h Processor ID stuff from Infeneon uc_id.inc

xmc4500.h Register definitions xmc4500_gpio.h Some extra defins for GPIO

main.cpp The main program

For me it works to do make clean, make, make flash. But this might depend on your particular setup.