Enabling UART0 Async while Shell over USB is enabled caused system crash

RE: Enabling UART0 Async while Shell over USB is enabled caused system crash

cgi27 — Wed, 18 Sep 2024 01:39:04 GMT

I managed to resolve the problem by adding

CONFIG_SHELL_BACKEND_SERIAL_API_INTERRUPT_DRIVEN=y

RE: Enabling UART0 Async while Shell over USB is enabled caused system crash

cgi27 — Tue, 17 Sep 2024 22:17:47 GMT

Yes it's being enabled. I don't have any issue running CDC ACM along with UART0 Async. The problem is when I start using the shell. RTT seems to be working when I set CONFIG_SHELL_BACKEND_SERIAL=n but receive crash log as posted earlier when CONFIG_SHELL_BACKEND_SERIAL=y

RE: Enabling UART0 Async while Shell over USB is enabled caused system crash

Charlie — Tue, 17 Sep 2024 12:53:23 GMT

Could you check your final configuraiton with CONFIG_UART_INTERRUPT_DRIVEN?"CONFIG_UART_INTERRUPT_DRIVEN must be set for CDC ACM driver" according to the source codes: sdk-zephyr/subsys/usb/device/class/cdc_acm.c at main · nrfconnect/sdk-zephyr (github.com).

I found the following discussion with a similar usage, it seems no mature solution now.

(+) Cannot get Async UART0 to work with USB CDC - Nordic Q&A - Nordic DevZone - Nordic DevZone (nordicsemi.com)

RE: Enabling UART0 Async while Shell over USB is enabled caused system crash

cgi27 — Mon, 16 Sep 2024 20:52:42 GMT

Yes with lines 30 onwards being commented out

RE: Enabling UART0 Async while Shell over USB is enabled caused system crash

Charlie — Mon, 16 Sep 2024 09:29:43 GMT

Hi,

Did you manage to make your device work as USB CDC Shell/console without error first?

You can refer to a previous discussion:(+) use NrfConnect SDK with 52840 dongle USB CDC Shell/console - Nordic Q&A - Nordic DevZone - Nordic DevZone (nordicsemi.com).

Best regards,

Charlie