FPGA tests

Use TinyFPGA to test.

USB

See echo of slightly modified input.

cd ../usb_cdc/examples/TinyFPGA-BX/OSS_CAD_Suite/
tinyprog -l
make PROJ=soc clean all
make PROJ=soc prog
tinyprog -b

minicom -D /dev/ttyACM0

USB2TTL

Attach another USB2TTL to pins 4,5 and see characters being passed between.

tinyprog -l
make clean all
make prog
tinyprog -b

minicom -D /dev/ttyACM0
minicom -D /dev/ttyUSB0