NRF91 - Overrun Issue + Buffer size limit

[MosheSmartAmr]

Hi, 

Working with Uart + DMA on the nrf91 board, we see two issues:

1. With baudrate of  115200, we get an overrun error after getting ~6KB of data. 

2. Sometimes we do not see an get an UART_RX_RDY Interrupt after timeout. 

please note that I disable and enable uart__rx multiple times in my code.

Thanks and BR,

Moshe

[MosheSmartAmr]

after some more debugging (about issue 2 ) we understand that after we call `uart_rx_enable` for the first time , dma works correctly. the second time we use `uart_rx_enable` the uart data is not being transported.

[AndreasF]

Hi Moshe.

Could you provide some code that show me what you are doing?

Best regards,

Andreas

[Shi]

[00:00:14.056,060] <wrn> Uir: uart_rx_enable(dev_uart, buf, len, 500)
[00:00:14.085,479] <inf> Uir: UART_RX_BUF_REQUEST
[00:00:17.340,698] <inf> Uir: UART_RX_RDY: 80
[00:00:17.389,404] <inf> app: UIR Recv
fe fe fe fe 68 aa aa aa  aa aa aa 68 11 04 34 37 |....h... ...h..47
33 37 b6 16 fe fe fe fe  68 aa aa aa aa aa aa 68 |37...... h......h
11 04 34 37 33 37 b6 16  fe fe fe fe 68 aa aa aa |..4737.. ....h...
aa aa aa 68 11 04 34 37  33 37 b6 16 fe fe fe fe |...h..47 37......
68 aa aa aa aa aa aa 68  11 04 34 37 33 37 b6 16 |h......h ..4737..

Start: [00:00:14.056,060]

UART_RX_RDY: [00:00:17.340,698]

[Simonr]

Hi

This case is rather old at this point in time, and the support engineer that was handling this case is no longer with us. Please create a new ticket where you describe your problem in detail and a support engineer will be assigned to your case.

Best regards,

Simon