Experiments with the XMC_2GO_XMC1100 eval board

Infineon has been pushing their XMC line of Cortex M based micro-processors pretty hevily in the last few months. Their dev boards are reasonably cheap (~$10-20USD depending on what you're looking for), and feature a JLINK based SWD debugger, which is pretty impressive. The Segger JLink debugger is a very nice piece of kit, so knowing this was on the boards was very appealing.

They also have a promotion or similar going on with ARM/Keil, where you can get the latest version of the Keil ARM compiler (uVision 5), and use that. Having used the Keil compiler for other processors, this was also attractive. There is a code limit of 128KB, but when you're using the bottom end processors, you don't have any more flash than that anyway, so that's not really an issue.


The XMC_2GO_XMC1100 is a nice little eval board with the XMC1100 on it, and also an XMC4200 used for the JLINK SWD interface.  
The PCB comes with 0.1-inch (2.54mm) headers for  letting you plug it into a standard breadboard.
The board is powered by USB, and the USB connection is used both for the JLINK connection, but also acts as a USB UART at the same time, which is super convinient..  

photo of XMC_2GO board on breadboard

Useful Links for Getting Started

Getting started with the kit was a little frustrating. The link on the packaging is an old link, and the website re-directs you, so you need to do a little digging to find how to start using the XMC_2GO_XMC1100 kit. The default development tools to use with it is the Infineon DAVE system. after getting the standard example program running, (blink some LEDs!) it was time to try a few other interesting things.

A Simple CLI interface

This was a little fiddly to get working, but it was mostly in setting up the UART pins for the serial link. The code is based on the simple CLI interface described here.
To get it to work I needed to make some functions to read and write characters to the UART. You can get the files here:

main.c is basically a new file. it: There was not real change to cli.c or cli.h, though i did add the command code values for the Enter Key and the Backspace key.

Capacitive Touch

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