void SpiDeInit(Spi_t *obj)
{
/* First stop transfers */
DSPI_HAL_StopTransfer(obj->Spi);
/* Restore the module to defaults then power it down. This also disables the DSPI module.*/
DSPI_HAL_Init(obj->Spi);
/* disable the interrupt*/
INT_SYS_DisableIRQ (g_dspiIrqId[obj->instance]);
/* Gate the clock for DSPI.*/
CLOCK_SYS_DisableSpiClock(obj->instance);
GpioInit(&obj->Mosi, obj->Mosi.pin, PIN_OUTPUT, PIN_PUSH_PULL, PIN_NO_PULL, 0);
GpioInit(&obj->Miso, obj->Miso.pin, PIN_OUTPUT, PIN_PUSH_PULL, PIN_PULL_DOWN, 0);
GpioInit(&obj->Sclk, obj->Sclk.pin, PIN_OUTPUT, PIN_PUSH_PULL, PIN_NO_PULL, 0);
GpioInit(&obj->Nss, obj->Nss.pin, PIN_OUTPUT, PIN_PUSH_PULL, PIN_NO_PULL, 1);
}
/*FUNCTION**********************************************************************
*
* Function Name : SPI_DRV_DmaSlaveDeinit
* Description : De-initializes the device.
* Clears the control register and turns off the clock to the module.
*
*END**************************************************************************/
spi_status_t SPI_DRV_DmaSlaveDeinit(uint32_t instance)
{
spi_dma_slave_state_t * spiState = (spi_dma_slave_state_t *)g_spiStatePtr[instance];
SPI_Type *base = g_spiBase[instance];
assert(instance < SPI_INSTANCE_COUNT);
/* Disable SPI interrupt */
INT_SYS_DisableIRQ(g_spiIrqId[instance]);
/* Reset the SPI module to its default settings including disabling SPI and its interrupts */
SPI_HAL_Init(base);
#if FSL_FEATURE_SPI_16BIT_TRANSFERS
if (g_spiFifoSize[instance] != 0)
{
SPI_HAL_SetFifoIntCmd(base, kSpiRxFifoNearFullInt, false);
}
/* disable transmit interrupt */
SPI_HAL_SetIntMode(base, kSpiTxEmptyInt, false);
#endif /* FSL_FEATURE_SPI_16BIT_TRANSFERS */
/* Free DMA channels */
DMA_DRV_FreeChannel(&spiState->dmaReceive);
DMA_DRV_FreeChannel(&spiState->dmaTransmit);
/* Disable clock for SPI */
CLOCK_SYS_DisableSpiClock(instance);
/* Destroy the event */
OSA_EventDestroy(&spiState->event);
/* Clear state pointer */
g_spiStatePtr[instance] = NULL;
return kStatus_SPI_Success;
}
/*FUNCTION**********************************************************************
*
* Function Name : SPI_DRV_MasterDeinit
* Description : Shutdown a SPI instance.
* This function resets the SPI peripheral, gates its clock, and disables the interrupt to
* the core.
*
*END**************************************************************************/
spi_status_t SPI_DRV_MasterDeinit(uint32_t instance)
{
/* instantiate local variable of type spi_master_state_t and point to global state */
spi_master_state_t * spiState = (spi_master_state_t *)g_spiStatePtr[instance];
SPI_Type *base = g_spiBase[instance];
/* Restore the module to defaults which includes disabling the SPI then power it down.*/
SPI_HAL_Init(base);
/* destroy the interrupt sync object.*/
OSA_SemaDestroy(&spiState->irqSync);
/* Disable SPI interrupt.*/
INT_SYS_DisableIRQ(g_spiIrqId[instance]);
/* Gate the clock for SPI.*/
CLOCK_SYS_DisableSpiClock(instance);
/* Clear state pointer. */
g_spiStatePtr[instance] = NULL;
return kStatus_SPI_Success;
}
