Problem when using UART (eTPU) function

Wu — Thu, 14 Dec 2006 23:46:48 GMT

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

Re: Problem when using UART (eTPU) function

Arev — Mon, 18 Dec 2006 18:16:53 GMT

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

ColdFire/68K Microcontrollers and ProcessorsのトピックRe: Problem when using UART (eTPU) function

Problem when using UART (eTPU) function

Re: Problem when using UART (eTPU) function