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Problems with USB Serial and NUCLEO-F401RE on OSX

Question asked by dhylands on Feb 10, 2016
Latest reply on Feb 15, 2016 by Clive One
I have a Nucelo-F401RE board and have updated to the latest firmware on the stlink portion of the board (V2J26M15).

I have some code running on the 401 (MicroPython) which has a REPL on UART2 (which connects through to the 103 chip on the stlink portion - so SB13 & 14 are both present).

I can plug the nucleo board into my linux host, and connect to /dev/ttyACM0 and get my REPL with no troubles.

However, if I plug the nucleo board into my Mac Mini, running Yosemite (10.10.5) then I see /dev/tty.usbmodemXXX and /dev/cu.usbmodemXXX show up, but I can't see any serial data on either one. I've tried using screen and picocom and neither one works.

My regular pyboard (with a 405) and MicroPython works fine (under both linux and on the mini), so there seems to be an issue with the usb-serial running on the stlink portion of the nucleo board.

Has anybody else run into a problem like this?
Are there any workarounds?