A couple of changes to http://j-core.org/#download_bitstream made it easy for me to get going:
- In order to make ModemManager not try to think it’s a “modem”, create /etc/udev/rules.d/52-numato.rules with the following content:
# Make ModemManager ignore Numato FPGA board ATTRS{idVendor}=="2a19", ATTRS{idProduct}=="1002", ENV{ID_MM_DEVICE_IGNORE}="1" - You will need to install python3-pyserial and minicom
- The minicom command line i used was:
sudo stty -F /dev/ttyACM0 -crtscts && minicom -b 115200 -D /dev/ttyACM0
and along with the instructions on j-core.org, I got it to load a known good build.
You may also be interested in FPGArduino which uses either MIPS or Berkeley’s RISC-V subsets for the core. Unfortunately the Numato Mimas V2 prebuilt bitstream for the FPGA is missing from their site, but maybe they can easily regenerate it.
If I understand it correctly, they and j-core are using VHDL source for their cores, so they may be interested in a j-core FPGArduino version too.