I seem to only be able to upload to the board from the middle port if I first run
cat /dev/cu.usbmodem1421 ,on mac
If I run
cat chip.bin >/dev/cu.usbmodem1421 before
cat /dev/cu.usbmodem1421 all the LEDs turn on, and then running it again after trying to upload I get an rbits error.
So after replugging in the board I run
stty -f /dev/cu.usbmodem1421 raw, then
cat /dev/cu.usbmodem1421 and get the same error as previous.
The only way to upload programs seems to be to run
cat /dev/cu.usbmodem1421 before
cat chip.bin > /dev/cu.usbmodem1421
Does anybody have any solutions?