How can I clear TXDRDY interrupt in uart?

[leibin]

Hi, I'm using nrf51822. After sending a data from TXD, I enable the TXDRDY interrupt by setting INTENSET register. Then I can get into TXDRDY interrupt handler function. But I don't know how to clear the pending interrupt, then the interrupt handler function will be triggered again and again. I know setting INTENCLR register can disable the interrupt. But I don't want to disable the interrupt and enable it after sending another data, I just want to clear current interrupt and can get another interrupt after I sent another data. How can I deal with it?

Thanks, BinLei

[RK]

You don't need to clear the pending interrupt - the entry to the interrupt handler does that for you, you need to clear the task

NRF_UART0->EVENTS_TDXRDY = 0

You can see this in the sample code too. Generally if an event is set up to generate an interrupt, the event needs to be cleared before you leave the interrupt handler or else it will trigger again.

[leibin]

I got it! Thanks!