infinite loops

[femec_2299216]

What can it be when the function (while(0u == (nRF_SPI_GetMasterInterruptSource() & nRF_SPI_INTR_MASTER_SPI_DONE))) goes to infinite loops?

void SPI_wait_done() {

  nRF_SPI_ClearMasterInterruptSource(nRF_SPI_INTR_MASTER_SPI_DONE); 

  while(0u == (nRF_SPI_GetMasterInterruptSource() & nRF_SPI_INTR_MASTER_SPI_DONE))

    ;  /* Wait while Master completes transfer */

    /* Clear interrupt source after transfer completion */

  nRF_SPI_ClearMasterInterruptSource(nRF_SPI_INTR_MASTER_SPI_DONE);

}

[MotooTanaka]

Hi,

I would do something like

=============================

int SPI_wait_done() {

  int result = OK ;

  uint32_t timeout = 0xFFFFFF ; /* some big number to wait */

  nRF_SPI_ClearMasterInterruptSource(nRF_SPI_INTR_MASTER_SPI_DONE);

  while(0u == (nRF_SPI_GetMasterInterruptSource() & nRF_SPI_INTR_MASTER_SPI_DONE)) {

     if (--timeout == 0) {

          result = TIMEOUT ;

          break ;

     }

  }

...

=============================

moto

[Yugandhar · Accepted solution]

Hello,

The API nRF_SPI_GetMasterInterruptSource() will returns Master interrupt request register. This register contains current status of Master interrupt sources. The master interrupt source nRF_SPI_INTR_MASTER_SPI_DONE will describe that SPI master transfer is completed.

The function (while(0u == (nRF_SPI_GetMasterInterruptSource() & nRF_SPI_INTR_MASTER_SPI_DONE))) goes to infinite loops when the SPI master transfer is not completed.

Thanks,

P Yugandhar.

[Yugandhar]

Please refer the PSoC4 Serial communication Block(SCB) Component for more information in the below link.

http://www.cypress.com/file/220331/download

Thanks,

P Yugandhar.