SPI MQX set delays

[cwati]

Hi there,

I've been trying to port some SPI code from basic KSDK 1.0.0 to MQX 4.1 (SPI not SPI legacy).

Code works smoothly in KSDK 1.0.0, but I notice some timing issues in MQX 4.1.

We use the following set delays in KSDK.  Is there similar set delay functionality in MQX for SPI?

  status = DSPI_DRV_MasterSetDelay(instance,

    kDspiPcsToSck,

    500, // delayInNanoSec

    & calculatedPcsToSck);

  if (status != kStatus_DSPI_Success)

  return false;

    status = DSPI_DRV_MasterSetDelay(instance,

    kDspiLastSckToPcs,

    500, // delayInNanoSec

    & calculatedLastSckToPcs);

  if (status != kStatus_DSPI_Success)

  return false;

  status = DSPI_DRV_MasterSetDelay(instance,

    kDspiAfterTransfer,

    500, // delayInNanoSec

    & calculatedAfterTransfer);

  if (status != kStatus_DSPI_Success)

  return false;

Thanks,
Cecylia

[cwati · Accepted solution]

Hmmmpf, doesn't seem like MQX has explicit IOCTLs to set delays (KSDK "DSPI_DRV_MasterSetDelay") but if you set the baud rate correctly, MQX' "_dspi_find_baudrate" will resolve it for you.

[danielchen]

I think in mqx, you can use wait function, but the resolution is not fine. Thank you for your sharing.