full UART IDF functionality (UART-ISR) in Arduino

[kendo55]

Is there a way to use the full UART IDF functionality (UART-ISR) in Arduino.
As is possible e.g. in the Arduino Pico core, with full SDK functionality

[mrengineer7777]

What functionality are you missing? HardwareSerial uses the IDF, but hides a lot of the complexity. You can also get direct access to IDF functions by compiling "Arduino as IDF component", but that's difficult to build correctly.

[kendo55]

P1: Rx- and Tx-Interrupt
P2: RTS and CTS

[mrengineer7777]

P1: Rx- and Tx-Interrupt

See Serial.onReceive()
#6134

P2: RTS and CTS

You are correct. I don't see that option in this repository.

[kendo55]

thanks for info about Serial.onReceive()

Is there an option Serial.onEndTx()
I need an Int "EndOfTx" after each char who was transmitted.

Have you an idea what we can do to realise RTS/CTS

[mrengineer7777]

// negative Pin value will keep it unmodified
void HardwareSerial::setPins(int8_t rxPin, int8_t txPin, int8_t ctsPin, int8_t rtsPin)
{
    if(_uart == NULL) {
        log_e("setPins() shall be called after begin() - nothing done");
        return;
    }
    uartSetPins(_uart, rxPin, txPin, ctsPin, rtsPin);
}

I haven't used RTS/CTS.

[mrengineer7777]

HardwareSerial::setHwFlowCtrlMode()

[mrengineer7777]

I don't see an interrupt for TX. You could: 1) set TX buffer size to 1. 2) Use void HardwareSerial::flush(bool txOnly) 3) Use size_t HardwareSerial::write(uint8_t c) to write one character at a time. Sounds inefficient.

[kendo55]

Thanks for the HardwareSerial::setHwFlowCtrlMode() infos.

Tx-IRQ is really needed!