[Flashforth-devel] Sending Forth files with macOS over USB

[Tristan W. <ho...@tj...>]

Hello,

I am using a PIC18F14K50 with FlashForth 5 connecting over USB on
macOS (10.11 & 10.14). I can enter Forth interactively using both Minicom
and ff-shell.py. However, with my setup, neither Minicom nor
ff-shell.py is able to successfully send a file of forth source. The
PIC appears to be overwhelmed by a torrent of Forth. I did wonder
whether the PIC was making a value judgement about quality of my code,
but think it more likely that my setup has a flow control
problem. Both Minicom and ff-shell.py were setup to use CRTSCTS
(though changing to XON/XOFF made no difference) which I think is
correct for a USB CDC serial connection. Running Minicom and
ff-shell.py interactively and checking the USB CDC serial port
settings with stty whilst they are running showed that neither CRTSCTS
nor XON/XOFF appeared to be set. I do not know if that is normal for
macOS with CDC.

If anyone is using macOS and is able to send files via Minicom or
ff-shell.py over USB I would appreciate any pointers as to where I am
going wrong.

I've written a small transfer program for my setup, so I can send
Forth files and am enjoying using FlashForth greatly. However, I am
new to USB/CDC and would like to know what is wrong with my setup and
how to fix it (if possible!) so I can use the existing shells.  All
help gratefully received. 

Thank you!

Tristan