[nRF Connect SDK] uart tx failure

RE: [nRF Connect SDK] uart tx failure

Tim Hwang — Fri, 13 May 2022 10:01:02 GMT

I could manage to fix it.

Your uart driver worked well. All is timing issue between MCU s/w and my project. I reduce my margin and it works.
Thanks for your support anyway.
(I'm still using polling for Tx.)

RE: [nRF Connect SDK] uart tx failure

Tim Hwang — Thu, 12 May 2022 23:31:25 GMT

It was not effective for me.
poll api, int api for tx is not working.
async api works but I cannot use it as I mentioned.

RE: [nRF Connect SDK] uart tx failure

Simon — Thu, 12 May 2022 12:25:58 GMT

Would that be fine for you? To use uart_poll_out() to send data? Should we close this ticket?

RE: [nRF Connect SDK] uart tx failure

Tim Hwang — Thu, 12 May 2022 02:16:55 GMT

Thanks for updating.
From your sample, INT used for Rx with polling writing api. It seems that It is nothing different with me.

Prj.conf
CONFIG_SERIAL=y
CONFIG_UART_INTERRUPT_DRIVEN=y
main.c
uart_poll_out(uart_dev, buf[i]);

I'm checking 4 uart line with micro-scope then update it.

RE: [nRF Connect SDK] uart tx failure

Simon — Wed, 11 May 2022 20:58:46 GMT

Sorry for the late answer, I was a little bit busy today. Have you seen the sample https://github.com/nrfconnect/sdk-zephyr/tree/main/samples/drivers/uart/echo_bot? Please let me know if this is not suficcient and I will help you to have the firmware ready before the end of the week.

RE: [nRF Connect SDK] uart tx failure

Tim Hwang — Wed, 11 May 2022 04:02:40 GMT

In my test, async uart sample works with my target MCU so far. However I'm using interrupt-driven method due to case #286832 at the beginning of NCS project.

My project do requires good performance of UART Rx. (current-speed = <921600>; hw-flow-control;)
Otherwise We don't have lots of Tx data than Rx.

Currently I'm satisfied with INT-driven with uart for Rx.
I believe you can give me good solution. 🙂

RE: [nRF Connect SDK] uart tx failure

Tim Hwang — Wed, 11 May 2022 01:43:32 GMT

I found uart_irq_tx_complete() returns '0' in success case. Please take into your consideration.

RE: [nRF Connect SDK] uart tx failure

Simon — Tue, 10 May 2022 18:40:04 GMT

Hello, I will take a look at this tomorrow.

Best regards,

Simon