Some Uart interrupt sources in one external isr

[Anonymous]

Hi,

   

How could manage "TX FIFO empty" and "RX FIFO not empty" interrupt sources, for example, if I only have one external interrupt output ?

   

Must it be checked any flag inside "CY_ISR(MyUart_ISR){}" for determining which interrupt was who produced interrupt ? 

   

Thanks,

   

Asier.

[Bob_Marlowe · Accepted solution]

You are quite right. Checking the UART state will also clear (some) interrupt causes.

       

Bob

[Anonymous]

Thank you Bob.

   

Which are the flags I could polling to catch "TX FIFO empty" and "RX FIFO not empty" events ?

   

I want to be able to distinguish between the two events and so do the corresponding task. I mean, U1_UartGetChar(); if  "RX FIFO not empty" interrupt happens and U1_UartPutChar(); if it catches "TX FIFO empty".

   

Asier.

[Bob_Marlowe]

Look into datasheet for uint32 SCB_GetTxInterruptSource(void) starting at page 189.

       

Bob