UART communication FIFO error

RE: UART communication FIFO error

yokokawa — Thu, 17 Oct 2019 08:47:09 GMT

1) How do I set the UART reception interrupt when using “nrfx_uarte.c”?
2) Please let me know the maximum value of “size_tlength” of “nrfx_uarte_tx ()” and “nrfx_uarte_tx ()”.

RE: UART communication FIFO error

Nguyen Hoan Hoang — Thu, 17 Oct 2019 03:41:12 GMT

https://github.com/IOsonata/IOsonata/tree/master/Python

on PC. modify the code to select your COM port. Require python3

RE: UART communication FIFO error

yokokawa — Thu, 17 Oct 2019 03:35:46 GMT

Thank you very much. The contents of “UartSdkPrbsTx.c” were confirmed.
The sending method was listed, but the receiving method was not listed.
Is there a sample program that can be used as a reference for UARTE reception?

RE: UART communication FIFO error

Nguyen Hoan Hoang — Thu, 17 Oct 2019 01:15:41 GMT

here https://github.com/IOsonata/IOsonata/blob/master/ARM/Nordic/exemples/UartSdkPrbsTx.c

RE: UART communication FIFO error

yokokawa — Thu, 17 Oct 2019 01:00:36 GMT

Is there a sample program that uses "nrfx_uart.C"?

Please introduce the sample program.

RE: UART communication FIFO error

Nguyen Hoan Hoang — Wed, 16 Oct 2019 14:39:08 GMT

As I already suggested, you can use Nordic nrfx_uart driver instead of app_uart.

RE: UART communication FIFO error

yokokawa — Wed, 16 Oct 2019 02:21:24 GMT

"Error Action (Central)"
When 2kbyte communication is performed, an error occurs at the following position regardless of the UART flow control.
("App_fifo_put()" of "ble_app_uart_c" during UART transmission))

In the answer below, it was suggested to use "uart_nrf5x.c". Is there a way to improve using the program provided by nordic?

RE: UART communication FIFO error

Nguyen Hoan Hoang — Wed, 16 Oct 2019 01:15:13 GMT

The usage examples are here https://github.com/IOsonata/IOsonata/tree/master/exemples/uart

Follow library source organization https://github.com/IOsonata/IOsonata to setup working folder tree

Follow these blog pages for more details :

http://embeddedsoftdev.blogspot.com

http://embeddedsoftdev.blogspot.com/p/ehal-nrf51.html

RE: UART communication FIFO error

yokokawa — Wed, 16 Oct 2019 00:58:53 GMT

1) What are the usage limits for uart_nrf5x.c?
2) Please tell me how to install "ble_app_uart_c" and "ble_app_uart".
Thank you very much.

RE: UART communication FIFO error

Nguyen Hoan Hoang — Wed, 16 Oct 2019 00:18:46 GMT

That is because the fifo is full and the byte is dropped. That is why in my test, you see lots of drops with app_uart.

RE: UART communication FIFO error

yokokawa — Wed, 16 Oct 2019 00:13:31 GMT

RE: UART communication FIFO error

Nguyen Hoan Hoang — Thu, 10 Oct 2019 16:39:30 GMT

On the UART side, app_uart is not recommended for your test. nrfx_uart works better. IOsonata library is much better https://github.com/IOsonata/IOsonata/blob/master/ARM/Nordic/src/uart_nrf5x.cpp

here are comparisons : tests performed on PCA10040. nRF52 UART Tx to PC (python Rx) via jlink uart bridge

app_uart C only drops a lot: ~ 69965 Bytes/s

nrfx_uart C only with DMA better : 75753 Bytes/s, no drop

IOSonata C++ object oriented UART no DMA : 86607 Bytes/s

IOsonata C++ object oriented with DMA : 100000 Bytes/s. Few drops via jlink. No drop via IDAP-Link or FTDI.

RE: UART communication FIFO error

Simon — Thu, 10 Oct 2019 14:10:44 GMT

[quote user=""]If 2kbyte data is transmitted continuously, a FIFO error will occur regardless of whether or not flow control is performed with the UART.
Please tell me how to take measures.[/quote]

Could you provide some more information? What function causes the error and what kind of error does the function return?

This video will help you figure it out:

www.youtube.com/watch

Best regards,

Simon