UARTE configuration with nrf9160 and zephyr

[Rajender]

Hi,

we have developed our working UART code according to Zephyr documentation, and its working fine,

we find that this code works with EasyDMA . but my question is my uart2_fifo_callback function is calling for every byte, why its happening like this, please help me to understand?

Note: we are using UART in UARTE_INTERRUPT_DRIVEN mode

and some other doubts are:

1. How we can increase/decide RX FIFO size

2. How we can configure UART so that the Uart_fifo_callback function will be called only once per every communication

3. What is the difference between UARTE_INTERRUPT_DRIVEN and CONFIG_UART_ASYNC_API, can we have interrupt handler even if i use CONFIG_ASYNC_API mode?

Best Regards

Rajener.

[ovrebekk]

Hi Rajener

I think it would be better to use the ASYNC version in this case. Then you can define a timeout, and rather than get a callback for each byte you will get a callback either if the RX buffer is full, or if the timeout is reached and there is no new data. 

I made a simple example to show how to use the UART ASYNC driver a while back:
https://github.com/too1/ncs-uart-async-count-rx/blob/master/src/main.c

Best regards
Torbjørn

[Rajender]

Hi,

Thank for your response,

But when i try to open this project in the Segger Embedded Studio, its not opening, For your reference i am attaching a screenshot of the same.

you can check my environment options by referring next pic-->

 

Please help to solve this issue, so that i can verify my UARTE

Best Regards

Rajender.

[Rajender]

Hi,

I solved this project creating issue,

i will update on the UARTE soon

Best Regards

Rajender

[Rajender]

Hi Torbjorn,

I have created your project in my segger embedded studio, but i con not find any configuration in uart_init() or anywhere else,  Where i can configure my UARTE properties(like baud rate, etc.,)

when i try to build and upload in to my nRF9160 board, its building and uploading fine, but now i can not see the output, i have tried all the baud rates given in my terminal software still no use.

NOTE: i have changed some code and configs, Please check below-->

#define UART_BUF_SIZE		10//16
#define UART_RX_TIMEOUT_MS	500//100

dev_uart = device_get_binding("UART_2");

Please help to understand

Best Regards

Rajender

[Rajender]

Hi,

Finally i have tested your project and its working fine, triggering interrupts according to the data buffer size and timeout delay,

but it working only one direction, means if i send any data to uart port through my terminal software its receiving and i can see the data also, but when i add uart tx function then also its not sending data to uart port from my microcontroller, i have tried both uart_tx() or z_impl_uart_tx() but no use
NOTE: i did not enabled console also, Im using uart_2 for my uart communication

Please help me to understand

Best Regards

Rajender

[Rajender]

Hi,

after spending some time on this i got to know that

when i transmit data using uart_tx() this will return 0, (means-successful) but again it will trigger timeout function(static void tx_timeout()) then, UART_TX_ABORTED event, and then UART_TX_DONE event.
but anyway data will not sends to the UART Terminal.

Please help me to solve this.

NOTE: I am attaching my project for your reference please check.

UART_TEST.zip

Best Regards

Rajender.