STM32F401RE UART Interrupt

[Kabeone]

Hello,

I'm new to embedded software and I have 2 questions about UART communication.

I've coded UART interrupt and have no problem with the transmit function, but the HAL_UART_Receive_IT(&huart2, rx, 10);

only read the first byte I passed to the serial port.

The second one is:

Does UART store byte received in a buffer and send them each time you read it.

Tanks in advance.

[S.Ma]

the hal provides a callback for both tramsmit and receive. you need to fill the callback to implement the ram buffer fifo there. alternatively, use dma cyclically on a ram buffer and periodically poll for incoming data.

[Kabeone]

Thank you for your quick answer, I'm gonna try that

[Tesla DeLorean]

Your interrupt handler is supposed to call into HAL, and once HAL accumulates the requested 10 bytes, it calls you back.

Once that is done you need to resubmit a new HAL_UART_Receive_IT()

Want people to have a better idea of exactly what you've built, show code..