Problem when using UART (eTPU) function

[Wu]

Hi All,

I think this is a sample question.

I  am using 'fs_etpu_uart_read_receive_data' eTPU function to receive data.

Here is the code:

 uint32 data = 0;
 uint8_t errCode = 1;

 while(1)
 {  
  data = fs_etpu_uart_read_receive_data(11, &errCode);
  if (errCode == 0)
  {

     //Postion 1

      .........

      .........
      return 1;
  }

If I sent just one byte from other side, my code will always reach 'Postion 1' and return the same data value.

It seems that I missed to clear a flag after I receive each byte.

Could anyone point out what is wrong in my code?

Thanks,

Ben

[Arev]

Hello,

After reading the Received Data, you must Clear the Channel Interrupt Bit, Write CIS/CIC bit = 1 in the eTPU Channel Status Control Register ETPU_CnSCR[].

Something like : ETPU.CHAN[ETPU_UART0_RX].SCR.B.CIS = 1;

Bye