Chip resets when Rx pin held low for long time

RE: Chip resets when Rx pin held low for long time

Susheel Nuguru — Mon, 25 Nov 2024 08:06:17 GMT

Thanks for coming back with the fix Amin, a lot has changed in 1 year and a lot of fixes went into the UART library and drivers. It is good to know that adding blocking circuit on rx pin worked so that others can use it if they are using older sdk versions and have the same issue.

RE: Chip resets when Rx pin held low for long time

Amin — Mon, 25 Nov 2024 03:13:54 GMT

Sorry for the delay,

You can reproduce this on a generic development board as I did.
This happens when you set the baud rate of UART to 115200 and the Rx pin held low for long enough time like 10ms. In these conditions, the UART receiving buffer is overflew while the ble send buffer is not fast enough.

I fixed that issue by adding a blocking circuit to rx pin of nRF52833.

RE: Chip resets when Rx pin held low for long time

Susheel Nuguru — Fri, 03 Nov 2023 11:59:14 GMT

We need to know the context of the faulting thread/interrupt to be able to understand what caused the assert. You can do

Get the exact filename and line number of the faulting instruction using addr2line
enable CONFIG_THREAD_NAME=y in your prj.conf file to get more info in the log apart from just the address.

After we know the context, file and line that caused this, we can try to understand what workaround is needed to fix this.