Update ReadMe.md

ReadMe.md

@@ -12,6 +12,20 @@ This Code is for uploading the [TECware](https://gitlab.psi.ch/coldbox/tec/tecwa
 - copy the srec file from the [TECware](https://gitlab.psi.ch/coldbox/tec/tecware) repo to this directory
 - (If you are on windows, please change you CAN Interface in the uploadtec.py script) [here](https://www.feaser.com/en/blog/2018/07/libopenblt-python-bindings-tutorial/) some infos
 
+### Install the CAN interface (for RPi CAN Hat)
+
+Add the following line to your /boot/config.txt file:
+`dtoverlay=mcp2515-can0,oscillator=12000000,interrupt=25,spimaxfrequency=2000000`
+
+`sudo reboot`
+
+`pip3 install python-can`
+... for python module
+
+maybe edit permissions
+`./resetCAN.sh`
+... for starting can0
+
 ## Usage
 
 to use this script the libopenblt.(so on linux)(dll on windows) library should be in the same directory.