rt-thread/bsp/lpc408x/Libraries/Drivers/source/lpc_ssp.c

/**********************************************************************
* $Id$      lpc_ssp.c           2011-06-02
*//**
* @file     lpc_ssp.c
* @brief    Contains all functions support for SSP firmware library
*           on LPC
* @version  1.0
* @date     02. June. 2011
* @author   NXP MCU SW Application Team
* 
* Copyright(C) 2011, NXP Semiconductor
* All rights reserved.
*
***********************************************************************
* Software that is described herein is for illustrative purposes only
* which provides customers with programming information regarding the
* products. This software is supplied "AS IS" without any warranties.
* NXP Semiconductors assumes no responsibility or liability for the
* use of the software, conveys no license or title under any patent,
* copyright, or mask work right to the product. NXP Semiconductors
* reserves the right to make changes in the software without
* notification. NXP Semiconductors also make no representation or
* warranty that such application will be suitable for the specified
* use without further testing or modification.
* Permission to use, copy, modify, and distribute this software and its
* documentation is hereby granted, under NXP Semiconductors'
* relevant copyright in the software, without fee, provided that it
* is used in conjunction with NXP Semiconductors microcontrollers.  This
* copyright, permission, and disclaimer notice must appear in all copies of
* this code.
**********************************************************************/

/* Peripheral group ----------------------------------------------------------- */
/** @addtogroup SSP
 * @{
 */
#ifdef __BUILD_WITH_EXAMPLE__
#include "lpc_libcfg.h"
#else
#include "lpc_libcfg_default.h"
#endif /* __BUILD_WITH_EXAMPLE__ */
#ifdef _SSP

/* Includes ------------------------------------------------------------------- */
#include "lpc_ssp.h"
#include "lpc_clkpwr.h"

/* Public Functions ----------------------------------------------------------- */
/** @addtogroup SSP_Public_Functions
 * @{
 */
static void setSSPclock (LPC_SSP_TypeDef *SSPx, uint32_t target_clock);

/*********************************************************************//**
 * @brief       Setup clock rate for SSP device
 * @param[in]   SSPx    SSP peripheral definition, should be:
 *                      - LPC_SSP0: SSP0 peripheral
 *                      - LPC_SSP1: SSP1 peripheral
 * @param[in]   target_clock : clock of SSP (Hz)
 * @return      None
 ***********************************************************************/
static void setSSPclock (LPC_SSP_TypeDef *SSPx, uint32_t target_clock)
{
    uint32_t prescale, cr0_div, cmp_clk, ssp_clk;
    ssp_clk = CLKPWR_GetCLK (CLKPWR_CLKTYPE_PER);

    /* Find closest divider to get at or under the target frequency.
       Use smallest prescale possible and rely on the divider to get
       the closest target frequency */
    cr0_div = 0;
    cmp_clk = 0xFFFFFFFF;
    prescale = 2;
    while (cmp_clk > target_clock)
    {
        cmp_clk = ssp_clk / ((cr0_div + 1) * prescale);
        if (cmp_clk > target_clock)
        {
            cr0_div++;
            if (cr0_div > 0xFF)
            {
                cr0_div = 0;
                prescale += 2;
            }
        }
    }

    /* Write computed prescaler and divider back to register */
    SSPx->CR0 &= (~SSP_CR0_SCR(0xFF)) & SSP_CR0_BITMASK;
    SSPx->CR0 |= (SSP_CR0_SCR(cr0_div)) & SSP_CR0_BITMASK;
    SSPx->CPSR = prescale & SSP_CPSR_BITMASK;
}

/**
 * @}
 */

/* Public Functions ----------------------------------------------------------- */
/** @addtogroup SSP_Public_Functions
 * @{
 */

/********************************************************************//**
 * @brief       Initializes the SSPx peripheral according to the specified
*               parameters in the SSP_ConfigStruct.
 * @param[in]   SSPx    SSP peripheral selected, should be:
 *                      - LPC_SSP0: SSP0 peripheral
 *                      - LPC_SSP1: SSP1 peripheral
 * @param[in]   SSP_ConfigStruct Pointer to a SSP_CFG_Type structure
*                    that contains the configuration information for the
*                    specified SSP peripheral.
 * @return      None
 *********************************************************************/
void SSP_Init(LPC_SSP_TypeDef *SSPx, SSP_CFG_Type *SSP_ConfigStruct)
{
    uint32_t tmp;

    if(SSPx == LPC_SSP0) {
        /* Set up clock and power for SSP0 module */
        CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCSSP0, ENABLE);
    } else if(SSPx == LPC_SSP1) {
        /* Set up clock and power for SSP1 module */
        CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCSSP1, ENABLE);
    } else if(SSPx == LPC_SSP2) {
        /* Set up clock and power for SSP1 module */
        CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCSSP2, ENABLE);
    } else {
        return;
    }

    /* Configure SSP, interrupt is disable, LoopBack mode is disable,
     * SSP is disable, Slave output is disable as default
     */
    tmp = ((SSP_ConfigStruct->CPHA) | (SSP_ConfigStruct->CPOL) \
        | (SSP_ConfigStruct->FrameFormat) | (SSP_ConfigStruct->Databit))
        & SSP_CR0_BITMASK;
    // write back to SSP control register
    SSPx->CR0 = tmp;

    tmp = SSP_ConfigStruct->Mode & SSP_CR1_BITMASK;
    // Write back to CR1
    SSPx->CR1 = tmp;

    // Set clock rate for SSP peripheral
    setSSPclock(SSPx, SSP_ConfigStruct->ClockRate);
}

/*********************************************************************//**
 * @brief       De-initializes the SSPx peripheral registers to their
*                  default reset values.
 * @param[in]   SSPx    SSP peripheral selected, should be:
 *                      - LPC_SSP0: SSP0 peripheral
 *                      - LPC_SSP1: SSP1 peripheral
 * @return      None
 **********************************************************************/
void SSP_DeInit(LPC_SSP_TypeDef* SSPx)
{
    if (SSPx == LPC_SSP0){
        /* Set up clock and power for SSP0 module */
        CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCSSP0, DISABLE);
    } else if (SSPx == LPC_SSP1) {
        /* Set up clock and power for SSP1 module */
        CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCSSP1, DISABLE);
    } else if (SSPx == LPC_SSP2) {
        /* Set up clock and power for SSP1 module */
        CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCSSP2, DISABLE);
    }
}

/*****************************************************************************//**
* @brief        Get data size bit selected
* @param[in]    SSPx pointer to LPC_SSP_TypeDef structure, should be:
*               - LPC_SSP0: SSP0 peripheral
*               - LPC_SSP1: SSP1 peripheral
* @return       Data size, could be:
*               - SSP_DATABIT_4: 4 bit transfer
*               - SSP_DATABIT_5: 5 bit transfer
*               ...
*               - SSP_DATABIT_16: 16 bit transfer
*******************************************************************************/
uint8_t SSP_GetDataSize(LPC_SSP_TypeDef* SSPx)
{
    return (SSPx->CR0 & (0xF));
}

/*****************************************************************************//**
* @brief        Fills each SSP_InitStruct member with its default value:
*               - CPHA = SSP_CPHA_FIRST
*               - CPOL = SSP_CPOL_HI
*               - ClockRate = 1000000
*               - Databit = SSP_DATABIT_8
*               - Mode = SSP_MASTER_MODE
*               - FrameFormat = SSP_FRAME_SSP
* @param[in]    SSP_InitStruct Pointer to a SSP_CFG_Type structure
*                    which will be initialized.
* @return       None
*******************************************************************************/
void SSP_ConfigStructInit(SSP_CFG_Type *SSP_InitStruct)
{
    SSP_InitStruct->CPHA = SSP_CPHA_FIRST;
    SSP_InitStruct->CPOL = SSP_CPOL_HI;
    SSP_InitStruct->ClockRate = 1000000;
    SSP_InitStruct->Databit = SSP_DATABIT_8;
    SSP_InitStruct->Mode = SSP_MASTER_MODE;
    SSP_InitStruct->FrameFormat = SSP_FRAME_SPI;
}


/*********************************************************************//**
 * @brief       Enable or disable SSP peripheral's operation
 * @param[in]   SSPx    SSP peripheral, should be:
 *              - LPC_SSP0: SSP0 peripheral
 *              - LPC_SSP1: SSP1 peripheral
 * @param[in]   NewState New State of SSPx peripheral's operation
 * @return      none
 **********************************************************************/
void SSP_Cmd(LPC_SSP_TypeDef* SSPx, FunctionalState NewState)
{
    if (NewState == ENABLE)
    {
        SSPx->CR1 |= SSP_CR1_SSP_EN;
    }
    else
    {
        SSPx->CR1 &= (~SSP_CR1_SSP_EN) & SSP_CR1_BITMASK;
    }
}

/*********************************************************************//**
 * @brief       Enable or disable Loop Back mode function in SSP peripheral
 * @param[in]   SSPx    SSP peripheral selected, should be:
 *                      - LPC_SSP0: SSP0 peripheral
 *                      - LPC_SSP1: SSP1 peripheral
 * @param[in]   NewState    New State of Loop Back mode, should be:
 *                          - ENABLE: Enable this function
 *                          - DISABLE: Disable this function
 * @return      None
 **********************************************************************/
void SSP_LoopBackCmd(LPC_SSP_TypeDef* SSPx, FunctionalState NewState)
{
    if (NewState == ENABLE)
    {
        SSPx->CR1 |= SSP_CR1_LBM_EN;
    }
    else
    {
        SSPx->CR1 &= (~SSP_CR1_LBM_EN) & SSP_CR1_BITMASK;
    }
}

/*********************************************************************//**
 * @brief       Enable or disable Slave Output function in SSP peripheral
 * @param[in]   SSPx    SSP peripheral selected, should be:
 *                      - LPC_SSP0: SSP0 peripheral
 *                      - LPC_SSP1: SSP1 peripheral
 * @param[in]   NewState    New State of Slave Output function, should be:
 *                          - ENABLE: Slave Output in normal operation
 *                          - DISABLE: Slave Output is disabled. This blocks
 *                          SSP controller from driving the transmit data
 *                          line (MISO)
 * Note:        This function is available when SSP peripheral in Slave mode
 * @return      None
 **********************************************************************/
void SSP_SlaveOutputCmd(LPC_SSP_TypeDef* SSPx, FunctionalState NewState)
{
    if (NewState == ENABLE)
    {
        SSPx->CR1 &= (~SSP_CR1_SO_DISABLE) & SSP_CR1_BITMASK;
    }
    else
    {
        SSPx->CR1 |= SSP_CR1_SO_DISABLE;
    }
}



/*********************************************************************//**
 * @brief       Transmit a single data through SSPx peripheral
 * @param[in]   SSPx    SSP peripheral selected, should be:
 *                      - LPC_SSP0: SSP0 peripheral
 *                      - LPC_SSP1: SSP1 peripheral
 * @param[in]   Data    Data to transmit (must be 16 or 8-bit long,
 *                      this depend on SSP data bit number configured)
 * @return      none
 **********************************************************************/
void SSP_SendData(LPC_SSP_TypeDef* SSPx, uint16_t Data)
{
    SSPx->DR = SSP_DR_BITMASK(Data);
}



/*********************************************************************//**
 * @brief       Receive a single data from SSPx peripheral
 * @param[in]   SSPx    SSP peripheral selected, should be
 *                      - LPC_SSP0: SSP0 peripheral
 *                      - LPC_SSP1: SSP1 peripheral
 * @return      Data received (16-bit long)
 **********************************************************************/
uint16_t SSP_ReceiveData(LPC_SSP_TypeDef* SSPx)
{
    return ((uint16_t) (SSP_DR_BITMASK(SSPx->DR)));
}

/*********************************************************************//**
 * @brief       SSP Read write data function
 * @param[in]   SSPx    Pointer to SSP peripheral, should be
 *                      - LPC_SSP0: SSP0 peripheral
 *                      - LPC_SSP1: SSP1 peripheral
 * @param[in]   dataCfg Pointer to a SSP_DATA_SETUP_Type structure that
 *                      contains specified information about transmit
 *                      data configuration.
 * @param[in]   xfType  Transfer type, should be:
 *                      - SSP_TRANSFER_POLLING: Polling mode
 *                      - SSP_TRANSFER_INTERRUPT: Interrupt mode
 * @return      Actual Data length has been transferred in polling mode.
 *              In interrupt mode, always return (0)
 *              Return (-1) if error.
 * Note: This function can be used in both master and slave mode.
 ***********************************************************************/
int32_t SSP_ReadWrite (LPC_SSP_TypeDef *SSPx, SSP_DATA_SETUP_Type *dataCfg, \
                        SSP_TRANSFER_Type xfType)
{
    uint8_t *rdata8;
    uint8_t *wdata8;
    uint16_t *rdata16;
    uint16_t *wdata16;
    uint32_t stat;
    uint32_t tmp;
    int32_t dataword;

    dataCfg->rx_cnt = 0;
    dataCfg->tx_cnt = 0;
    dataCfg->status = 0;


    /* Clear all remaining data in RX FIFO */
    while (SSPx->SR & SSP_SR_RNE){
        tmp = (uint32_t) SSP_ReceiveData(SSPx);
    }

    // Clear status
    SSPx->ICR = SSP_ICR_BITMASK;
    if(SSP_GetDataSize(SSPx)>SSP_DATABIT_8)
        dataword = 1;
    else dataword = 0;

    // Polling mode ----------------------------------------------------------------------
    if (xfType == SSP_TRANSFER_POLLING){
        if (dataword == 0){
            rdata8 = (uint8_t *)dataCfg->rx_data;
            wdata8 = (uint8_t *)dataCfg->tx_data;
        } else {
            rdata16 = (uint16_t *)dataCfg->rx_data;
            wdata16 = (uint16_t *)dataCfg->tx_data;
        }
        while ((dataCfg->tx_cnt < dataCfg->length) || (dataCfg->rx_cnt < dataCfg->length)){
            if ((SSPx->SR & SSP_SR_TNF) && (dataCfg->tx_cnt < dataCfg->length)){
                // Write data to buffer
                if(dataCfg->tx_data == NULL){
                    if (dataword == 0){
                        SSP_SendData(SSPx, 0xFF);
                        dataCfg->tx_cnt++;
                    } else {
                        SSP_SendData(SSPx, 0xFFFF);
                        dataCfg->tx_cnt += 2;
                    }
                } else {
                    if (dataword == 0){
                        SSP_SendData(SSPx, *wdata8);
                        wdata8++;
                        dataCfg->tx_cnt++;
                    } else {
                        SSP_SendData(SSPx, *wdata16);
                        wdata16++;
                        dataCfg->tx_cnt += 2;
                    }
                }
            }

            // Check overrun error
            if ((stat = SSPx->RIS) & SSP_RIS_ROR){
                // save status and return
                dataCfg->status = stat | SSP_STAT_ERROR;
                return (-1);
            }

            // Check for any data available in RX FIFO
            while ((SSPx->SR & SSP_SR_RNE) && (dataCfg->rx_cnt < dataCfg->length)){
                // Read data from SSP data
                tmp = SSP_ReceiveData(SSPx);

                // Store data to destination
                if (dataCfg->rx_data != NULL)
                {
                    if (dataword == 0){
                        *(rdata8) = (uint8_t) tmp;
                        rdata8++;
                    } else {
                        *(rdata16) = (uint16_t) tmp;
                        rdata16++;
                    }
                }
                // Increase counter
                if (dataword == 0){
                    dataCfg->rx_cnt++;
                } else {
                    dataCfg->rx_cnt += 2;
                }
            }
        }

        // save status
        dataCfg->status = SSP_STAT_DONE;

        if (dataCfg->tx_data != NULL){
            return dataCfg->tx_cnt;
        } else if (dataCfg->rx_data != NULL){
            return dataCfg->rx_cnt;
        } else {
            return (0);
        }
    }

    // Interrupt mode ----------------------------------------------------------------------
    else if (xfType == SSP_TRANSFER_INTERRUPT){

        while ((SSPx->SR & SSP_SR_TNF) && (dataCfg->tx_cnt < dataCfg->length)){
            // Write data to buffer
            if(dataCfg->tx_data == NULL){
                if (dataword == 0){
                    SSP_SendData(SSPx, 0xFF);
                    dataCfg->tx_cnt++;
                } else {
                    SSP_SendData(SSPx, 0xFFFF);
                    dataCfg->tx_cnt += 2;
                }
            } else {
                if (dataword == 0){
                    SSP_SendData(SSPx, (*(uint8_t *)((uint32_t)dataCfg->tx_data + dataCfg->tx_cnt)));
                    dataCfg->tx_cnt++;
                } else {
                    SSP_SendData(SSPx, (*(uint16_t *)((uint32_t)dataCfg->tx_data + dataCfg->tx_cnt)));
                    dataCfg->tx_cnt += 2;
                }
            }

            // Check error
            if ((stat = SSPx->RIS) & SSP_RIS_ROR){
                // save status and return
                dataCfg->status = stat | SSP_STAT_ERROR;
                return (-1);
            }

            // Check for any data available in RX FIFO
            while ((SSPx->SR & SSP_SR_RNE) && (dataCfg->rx_cnt < dataCfg->length)){
                // Read data from SSP data
                tmp = SSP_ReceiveData(SSPx);

                // Store data to destination
                if (dataCfg->rx_data != NULL)
                {
                    if (dataword == 0){
                        *(uint8_t *)((uint32_t)dataCfg->rx_data + dataCfg->rx_cnt) = (uint8_t) tmp;
                    } else {
                        *(uint16_t *)((uint32_t)dataCfg->rx_data + dataCfg->rx_cnt) = (uint16_t) tmp;
                    }
                }
                // Increase counter
                if (dataword == 0){
                    dataCfg->rx_cnt++;
                } else {
                    dataCfg->rx_cnt += 2;
                }
            }
        }

        // If there more data to sent or receive
        if ((dataCfg->rx_cnt < dataCfg->length) || (dataCfg->tx_cnt < dataCfg->length)){
            // Enable all interrupt
            SSPx->IMSC = SSP_IMSC_BITMASK;
        } else {
            // Save status
            dataCfg->status = SSP_STAT_DONE;
        }
        return (0);
    }

    return (-1);
}

/*********************************************************************//**
 * @brief       Checks whether the specified SSP status flag is set or not
 * @param[in]   SSPx    SSP peripheral selected, should be:
 *                      - LPC_SSP0: SSP0 peripheral
 *                      - LPC_SSP1: SSP1 peripheral
 * @param[in]   FlagType    Type of flag to check status, should be one
 *                          of following:
 *                          - SSP_STAT_TXFIFO_EMPTY: TX FIFO is empty
 *                          - SSP_STAT_TXFIFO_NOTFULL: TX FIFO is not full
 *                          - SSP_STAT_RXFIFO_NOTEMPTY: RX FIFO is not empty
 *                          - SSP_STAT_RXFIFO_FULL: RX FIFO is full
 *                          - SSP_STAT_BUSY: SSP peripheral is busy
 * @return      New State of specified SSP status flag
 **********************************************************************/
FlagStatus SSP_GetStatus(LPC_SSP_TypeDef* SSPx, uint32_t FlagType)
{
    return ((SSPx->SR & FlagType) ? SET : RESET);
}

/*********************************************************************//**
 * @brief       Enable or disable specified interrupt type in SSP peripheral
 * @param[in]   SSPx    SSP peripheral selected, should be:
 *                      - LPC_SSP0: SSP0 peripheral
 *                      - LPC_SSP1: SSP1 peripheral
 * @param[in]   IntType Interrupt type in SSP peripheral, should be:
 *              - SSP_INTCFG_ROR: Receive Overrun interrupt
 *              - SSP_INTCFG_RT: Receive Time out interrupt
 *              - SSP_INTCFG_RX: RX FIFO is at least half full interrupt
 *              - SSP_INTCFG_TX: TX FIFO is at least half empty interrupt
 * @param[in]   NewState New State of specified interrupt type, should be:
 *              - ENABLE: Enable this interrupt type
 *              - DISABLE: Disable this interrupt type
 * @return      None
 * Note: We can enable/disable multi-interrupt type by OR multi value
 **********************************************************************/
void SSP_IntConfig(LPC_SSP_TypeDef *SSPx, uint32_t IntType, FunctionalState NewState)
{
    if (NewState == ENABLE)
    {
        SSPx->IMSC |= IntType;
    }
    else
    {
        SSPx->IMSC &= (~IntType) & SSP_IMSC_BITMASK;
    }
}

/*********************************************************************//**
 * @brief   Check whether the specified Raw interrupt status flag is
 *          set or not
 * @param[in]   SSPx    SSP peripheral selected, should be:
 *                      - LPC_SSP0: SSP0 peripheral
 *                      - LPC_SSP1: SSP1 peripheral
 * @param[in]   RawIntType  Raw Interrupt Type, should be:
 *              - SSP_INTSTAT_RAW_ROR: Receive Overrun interrupt
 *              - SSP_INTSTAT_RAW_RT: Receive Time out interrupt
 *              - SSP_INTSTAT_RAW_RX: RX FIFO is at least half full interrupt
 *              - SSP_INTSTAT_RAW_TX: TX FIFO is at least half empty interrupt
 * @return  New State of specified Raw interrupt status flag in SSP peripheral
 * Note: Enabling/Disabling specified interrupt in SSP peripheral does not
 *      effect to Raw Interrupt Status flag.
 **********************************************************************/
IntStatus SSP_GetRawIntStatus(LPC_SSP_TypeDef *SSPx, uint32_t RawIntType)
{
    return ((SSPx->RIS & RawIntType) ? SET : RESET);
}

/*********************************************************************//**
 * @brief       Get Raw Interrupt Status register
 * @param[in]   SSPx    SSP peripheral selected, should be:
 *                      - LPC_SSP0: SSP0 peripheral
 *                      - LPC_SSP1: SSP1 peripheral
 * @return      Raw Interrupt Status (RIS) register value
 **********************************************************************/
uint32_t SSP_GetRawIntStatusReg(LPC_SSP_TypeDef *SSPx)
{
    return (SSPx->RIS);
}

/*********************************************************************//**
 * @brief   Check whether the specified interrupt status flag is
 *          set or not
 * @param[in]   SSPx    SSP peripheral selected, should be:
 *                      - LPC_SSP0: SSP0 peripheral
 *                      - LPC_SSP1: SSP1 peripheral
 * @param[in]   IntType Raw Interrupt Type, should be:
 *              - SSP_INTSTAT_ROR: Receive Overrun interrupt
 *              - SSP_INTSTAT_RT: Receive Time out interrupt
 *              - SSP_INTSTAT_RX: RX FIFO is at least half full interrupt
 *              - SSP_INTSTAT_TX: TX FIFO is at least half empty interrupt
 * @return  New State of specified interrupt status flag in SSP peripheral
 * Note: Enabling/Disabling specified interrupt in SSP peripheral effects
 *          to Interrupt Status flag.
 **********************************************************************/
IntStatus SSP_GetIntStatus (LPC_SSP_TypeDef *SSPx, uint32_t IntType)
{
    return ((SSPx->MIS & IntType) ? SET :RESET);
}

/*********************************************************************//**
 * @brief               Clear specified interrupt pending in SSP peripheral
 * @param[in]   SSPx    SSP peripheral selected, should be:
 *                      - LPC_SSP0: SSP0 peripheral
 *                      - LPC_SSP1: SSP1 peripheral
 * @param[in]   IntType Interrupt pending to clear, should be:
 *                      - SSP_INTCLR_ROR: clears the "frame was received when
 *                      RxFIFO was full" interrupt.
 *                      - SSP_INTCLR_RT: clears the "Rx FIFO was not empty and
 *                      has not been read for a timeout period" interrupt.
 * @return      None
 **********************************************************************/
void SSP_ClearIntPending(LPC_SSP_TypeDef *SSPx, uint32_t IntType)
{
    SSPx->ICR = IntType;
}

/*********************************************************************//**
 * @brief               Enable/Disable DMA function for SSP peripheral
 * @param[in]   SSPx    SSP peripheral selected, should be:
 *                      - LPC_SSP0: SSP0 peripheral
 *                      - LPC_SSP1: SSP1 peripheral
 * @param[in]   DMAMode Type of DMA, should be:
 *                      - SSP_DMA_TX: DMA for the transmit FIFO
 *                      - SSP_DMA_RX: DMA for the Receive FIFO
 * @param[in]   NewState    New State of DMA function on SSP peripheral,
 *                      should be:
 *                      - ENALBE: Enable this function
 *                      - DISABLE: Disable this function
 * @return      None
 **********************************************************************/
void SSP_DMACmd(LPC_SSP_TypeDef *SSPx, uint32_t DMAMode, FunctionalState NewState)
{
    if (NewState == ENABLE)
    {
        SSPx->DMACR |= DMAMode;
    }
    else
    {
        SSPx->DMACR &= (~DMAMode) & SSP_DMA_BITMASK;
    }
}

/**
 * @}
 */

#endif /*_SSP*/
/**
 * @}
 */

/* --------------------------------- End Of File ------------------------------ */