When to use CyU3PDmaChannelSetWrapUp

[WGT_4383351]

In AN87216 slave firmware, there is

CyU3PGpifRegisterCallback(CyFxApplnGPIFEventCB);

CyU3PDmaChannelSetWrapUp(&glChHandleSlaveCh1);

What is the purpose, is this required as a work around for chip bug?

[JayakrishnaT_76 · Accepted solution]

Hello,

If any state in the state machine has the action INTR_CPU associated with it, then the state machine will Interrupt the on-chip CPU to generate CYU3P_GPIF_EVT_SM_INTERRUPT event, which is to be handled by the firmware application. This handling is done by the GPIF callback function which is registered using the API CyU3PGpifRegisterCallback.

Normally, a PROD event is triggered only when a full Buffer is received on the Producer socket. But the API CyU3PDmaChannelSetWrapUp will invoke the DMA callback function with the PROD_EVENT triggered even if the received buffer is a partial buffer or this is used for committing partial buffers.

Best Regards,

Jayakrishna