SHELL over USB (CDC ACM class device) will not accept incoming characters with Zephyr 2.7.0

RE: SHELL over USB (CDC ACM class device) will not accept incoming characters with Zephyr 2.7.0

ovrebekk — Thu, 18 Nov 2021 07:17:13 GMT

That's great news. I will close the case then 🙂

Best regards
Torbjørn

RE: SHELL over USB (CDC ACM class device) will not accept incoming characters with Zephyr 2.7.0

Philippe OReilly — Wed, 17 Nov 2021 14:30:05 GMT

Thanks Torbjørn. Your advice solved my problem.

Much appreciated.

Philippe

RE: SHELL over USB (CDC ACM class device) will not accept incoming characters with Zephyr 2.7.0

ovrebekk — Wed, 17 Nov 2021 13:56:25 GMT

Hi Philippe

Most likely the issue is that you are setting the console rather than the shell in your DTS overlay.

To fix this you should change this line:

zephyr,console = &cdc_acm_uart0;

To this:

zephyr,shell-uart = &cdc_acm_uart0;

According to the developers, in v2.7.0 there were some changes to how CDC ACM UART is configured, and the CDC ACM behavior has been changed to mimic UART more closely. Instead of using the Kconfig *ON_DEV_NAME options the chosen properties are used directly. For a more details description of the CDC ACM UART please have a look here.

For a full list of the Kconfig options removed in this release you can have a look here.

Best regards
Torbjørn