adding a button using cad.py

milled the board using Modella

setting the fuse

loading the echo test binary

dealing with a lot of serial voodoo on mac

until the board was happy to talk

finally manages to hack togehter the s/w to drive the button

ASM:

C:

sources:
hello.echo.button.44.cad
hello.echo.button.44.asm
hello.echo.button.44.c