/*
* ======== SPICC3200DMA_close ========
* @pre Function assumes that the handle is not NULL
*/
void SPICC3200DMA_close(SPI_Handle handle)
{
uintptr_t key;
SPICC3200DMA_Object *object = handle->object;
SPICC3200DMA_HWAttrs const *hwAttrs = handle->hwAttrs;
MAP_SPIDisable(hwAttrs->baseAddr);
MAP_SPICSDisable(hwAttrs->baseAddr);
MAP_SPIDmaDisable(hwAttrs->baseAddr, SPI_RX_DMA | SPI_TX_DMA);
MAP_SPIFIFODisable(hwAttrs->baseAddr, SPI_RX_FIFO | SPI_TX_FIFO);
/* Release power dependency on SPI. */
Power_releaseDependency(getPowerMgrId(hwAttrs->baseAddr));
Power_releaseDependency(PowerCC3200_PERIPH_UDMA);
Power_unregisterNotify(&(object->notifyObj));
if (object->hwiHandle) {
HwiP_delete(object->hwiHandle);
}
if (object->transferComplete) {
SemaphoreP_delete(object->transferComplete);
}
DebugP_log1("SPI:(%p) closed", hwAttrs->baseAddr);
key = HwiP_disable();
object->isOpen = false;
HwiP_restore(key);
}
/*!
\brief closes an opened spi communication port
\param fd - file descriptor of an opened SPI channel
\return upon successful completion, the function shall return 0.
Otherwise, -1 shall be returned
\sa spi_Open
\note
\warning
*/
int spi_Close(Fd_t fd)
{
unsigned long ulBase = LSPI_BASE;
g_SpiFd = 0;
if(g_ucDMAEnabled)
{
#ifdef SL_PLATFORM_MULTI_THREADED
osi_InterruptDeRegister(INT_LSPI);
osi_MsgQDelete(&DMAMsgQ);
#else
MAP_SPIIntUnregister(ulBase);
g_cDummy = 0;
#endif
MAP_SPIFIFODisable(ulBase,SPI_RX_FIFO);
MAP_SPIFIFODisable(ulBase,SPI_TX_FIFO);
MAP_SPIDmaDisable(ulBase,SPI_RX_DMA);
MAP_SPIDmaDisable(ulBase,SPI_TX_DMA);
}
//Disable Chip Select
MAP_SPICSDisable(LSPI_BASE);
//Disable SPI Channel
MAP_SPIDisable(ulBase);
// Reset SPI
MAP_SPIReset(ulBase);
// Enable SPI Peripheral
MAP_PRCMPeripheralClkDisable(PRCM_LSPI,PRCM_RUN_MODE_CLK|PRCM_SLP_MODE_CLK);
return 0;
}