Hello
I am using UART to communicate with an other micrcontroller. To handle well the communication between both, before sending a frame I am positionning an IO to 1 and after the end of the transmition I am pulling it back to 0.
My code is looking like that :
Where the funtion "send_data_via_uart1" is doing that :
In this function, the function "uart_poll_out" should be a blocking call. Which means I should not leave this function before sending all I have to send.
But some times I see my IO going back to 0 before the end of the transmission.
So my question is, is there any flag or semaphore indicating the end of the trnasmisison, somewhere in your driver implementation ?
I tried to add a loop on a flag going to false when "uart_irq_tx_complete" = 1 in my uart1 callback :
With tx_irq enable it makes my application being stuck in uart1 callback.
And with tx_irq disable it does not reach my flag.
After all that I still can't catch the end of my transmission.
Note that I am using UART without Easy DMA but I saw in nRF52840 datahseet that only UARTE has a TXSTOPPED event. And I am using UART polling API and not Async API.
Best regards
Thibaud
