UART problem

RE: UART problem

steelman.kwon — Mon, 04 Apr 2022 11:25:54 GMT

Thank you for answer.
The problem I had has been resolved.
I checked and it was a different issue.
I was having a problem using NFC (pin 0.09, pin 0.10)pins as a UART pin.
Now it has been resolved.

Thank you, Vidar Berg ^^

RE: UART problem

Vidar Berg — Mon, 04 Apr 2022 08:50:59 GMT

steelman.kwon, please create a new ticket where you include more details about your setup. If you always get APP_UART_COMMUNICATION_ERROR, then maybe there is a mismatch between the buadrate used on the sender and receiver?

RE: UART problem

steelman.kwon — Sat, 02 Apr 2022 04:24:28 GMT

I have the same problem.
ERROR does not occur because Vidar Berg's answer is applied, but if APP_UART_COMMUNICATION_ERROR is commented out, UART RX does not work. The uart_event_handle interrupt does not occur during data transmission.
Please give me a good advice.

RE: UART problem

pacaj2am — Mon, 08 Apr 2019 10:10:21 GMT

Will try that in the evening. But I ahve connected those with a jumper wire, so there should be nothing waiting there....

RE: UART problem

Vidar Berg — Mon, 08 Apr 2019 08:19:10 GMT

Based on the error message it looks like you are getting a framing error (UARTE.ERRORSRC). This can happen when flow control is disabled, and data is sent too fast. Please try to comment out following lines in main.c:

case APP_UART_COMMUNICATION_ERROR:
APP_ERROR_HANDLER(p_event->data.error_communication); // invokes app error handler if p_event->data.error_communication != 0.
break;

Note: invalid UART packets will be dropped.

RE: UART problem

pacaj2am — Sun, 07 Apr 2019 18:33:15 GMT

Bought now 2nd board and it has the same issue, keeping in hard fault after UART initialisation :-(

RE: UART problem

pacaj2am — Fri, 05 Apr 2019 20:04:10 GMT

This is the output:

<error> app: ERROR 4 [NRF_ERROR_NO_MEM] at C:\nsc\my_prj\examples\ble_peripheral\my_ble_app_uart\main.c:560
PC at: 0x0002EC85
<error> app: End of error report

I am using Segger Release 4.12 Build 2018112601.37855

RE: UART problem

Dmitry — Fri, 05 Apr 2019 10:05:32 GMT

NULL is understood by chip as pin 0, use NRF_UART_PSEL_DISCONNECTED instead.

RE: UART problem

Vidar Berg — Fri, 05 Apr 2019 09:11:51 GMT

Hi,

This should work. Are you using Segger Embedded Studio? In that case, please select the "Debug" target from the drop-down menu in the top left corner, then start a debug session. The console window will print out error information in case there is a code assert that causes the disconnect.

Best regards,

Vidar