//*****************************************************************************
//
//! Start a DMA transfer and wait for it to finish.
//!
//! This function will perform the steps necessary to initiate a DMA transfer
//! It waits until the transfer is complete before returning to the caller.
//!
//! \param ulChannel DMA Channel
//!
//! \return Zero if there is no error
//
//*****************************************************************************
unsigned long
StartAndCompleteSWTransfer(unsigned long ulChannel)
{
unsigned long ulIdx;
//
// Clear interrupt status
//
MAP_uDMAIntClear(0xffffffff);
MAP_uDMAChannelRequest(ulChannel);
//
// Wait for the mode to change to stopped
//
ulIdx = 0;
while(MAP_uDMAChannelModeGet(ulChannel) != UDMA_MODE_STOP)
{
ulIdx++;
if(ulIdx > 200000)
{
break;
}
}
if(MAP_uDMAChannelIsEnabled(ulChannel))
{
UART_PRINT("Error, channel was enabled at end of transfer\n");
return 1;
}
UART_PRINT("Transfer complete \n\r");
return(0);
}
//*****************************************************************************
//
//! DMA software interrupt handler
//!
//! \param None
//!
//! This function
//! 1. Invoked when DMA operation is complete
//!
//! \return None.
//
//*****************************************************************************
void
DmaSwIntHandler(void)
{
unsigned long uiIntStatus;
iDone = 1;
uiIntStatus = MAP_uDMAIntStatus();
MAP_uDMAIntClear(uiIntStatus);
}
//*****************************************************************************
//
//! DMA error interrupt handler
//!
//! \param None
//!
//! This function
//! 1. Invoked when DMA operation is in error
//!
//! \return None.
//
//*****************************************************************************
void
DmaErrorIntHandler(void)
{
MAP_uDMAIntClear(MAP_uDMAIntStatus());
}