File content as of revision 0:84d7747641aa:

/**
 * @file    : lpc17xx_gpdma.c
 * @brief    : Contains all functions support for GPDMA firmware library on LPC17xx
 * @version    : 1.0
 * @date    : 20. Apr. 2009
 * @author    : HieuNguyen
 **************************************************************************
 * 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.
 **********************************************************************/

/* Peripheral group ----------------------------------------------------------- */
/** @addtogroup GPDMA
 * @{
 */

/* Includes ------------------------------------------------------------------- */
#include "lpc17xx_gpdma.h"
#include "lpc17xx_clkpwr.h"

/* If this source file built with example, the LPC17xx FW library configuration
 * file in each example directory ("lpc17xx_libcfg.h") must be included,
 * otherwise the default FW library configuration file must be included instead
 */
#ifdef __BUILD_WITH_EXAMPLE__
#include "lpc17xx_libcfg.h"
#else
#include "lpc17xx_libcfg_default.h"
#endif /* __BUILD_WITH_EXAMPLE__ */

#ifdef _GPDMA


/* Private Variables ---------------------------------------------------------- */
/** @defgroup GPDMA_Private_Variables
 * @{
 */

/**
 * @brief Lookup Table of Connection Type matched with
 * Peripheral Data (FIFO) register base address
 */
#ifdef __IAR_SYSTEMS_ICC__
volatile const void *GPDMA_LUTPerAddr[] = {
        (&LPC_SSP0->DR),                // SSP0 Tx
        (&LPC_SSP0->DR),                // SSP0 Rx
        (&LPC_SSP1->DR),                // SSP1 Tx
        (&LPC_SSP1->DR),                // SSP1 Rx
        (&LPC_ADC->ADGDR),            // ADC
        (&LPC_I2S->I2STXFIFO),         // I2S Tx
        (&LPC_I2S->I2SRXFIFO),         // I2S Rx
        (&LPC_DAC->DACR),                // DAC
        (&LPC_UART0->/*RBTHDLR.*/THR),    // UART0 Tx
        (&LPC_UART0->/*RBTHDLR.*/RBR),    // UART0 Rx
        (&LPC_UART1->/*RBTHDLR.*/THR),    // UART1 Tx
        (&LPC_UART1->/*RBTHDLR.*/RBR),    // UART1 Rx
        (&LPC_UART2->/*RBTHDLR.*/THR),    // UART2 Tx
        (&LPC_UART2->/*RBTHDLR.*/RBR),    // UART2 Rx
        (&LPC_UART3->/*RBTHDLR.*/THR),    // UART3 Tx
        (&LPC_UART3->/*RBTHDLR.*/RBR),    // UART3 Rx
        (&LPC_TIM0->MR0),                // MAT0.0
        (&LPC_TIM0->MR1),                // MAT0.1
        (&LPC_TIM1->MR0),                // MAT1.0
        (&LPC_TIM1->MR1),                // MAT1.1
        (&LPC_TIM2->MR0),                // MAT2.0
        (&LPC_TIM2->MR1),                // MAT2.1
        (&LPC_TIM3->MR0),                // MAT3.0
        (&LPC_TIM3->MR1),                // MAT3.1
};
#else
const uint32_t GPDMA_LUTPerAddr[] = {
        ((uint32_t)&LPC_SSP0->DR),                // SSP0 Tx
        ((uint32_t)&LPC_SSP0->DR),                // SSP0 Rx
        ((uint32_t)&LPC_SSP1->DR),                // SSP1 Tx
        ((uint32_t)&LPC_SSP1->DR),                // SSP1 Rx
        ((uint32_t)&LPC_ADC->ADGDR),            // ADC
        ((uint32_t)&LPC_I2S->I2STXFIFO),         // I2S Tx
        ((uint32_t)&LPC_I2S->I2SRXFIFO),         // I2S Rx
        ((uint32_t)&LPC_DAC->DACR),                // DAC
        ((uint32_t)&LPC_UART0->/*RBTHDLR.*/THR),    // UART0 Tx
        ((uint32_t)&LPC_UART0->/*RBTHDLR.*/RBR),    // UART0 Rx
        ((uint32_t)&LPC_UART1->/*RBTHDLR.*/THR),    // UART1 Tx
        ((uint32_t)&LPC_UART1->/*RBTHDLR.*/RBR),    // UART1 Rx
        ((uint32_t)&LPC_UART2->/*RBTHDLR.*/THR),    // UART2 Tx
        ((uint32_t)&LPC_UART2->/*RBTHDLR.*/RBR),    // UART2 Rx
        ((uint32_t)&LPC_UART3->/*RBTHDLR.*/THR),    // UART3 Tx
        ((uint32_t)&LPC_UART3->/*RBTHDLR.*/RBR),    // UART3 Rx
        ((uint32_t)&LPC_TIM0->MR0),                // MAT0.0
        ((uint32_t)&LPC_TIM0->MR1),                // MAT0.1
        ((uint32_t)&LPC_TIM1->MR0),                // MAT1.0
        ((uint32_t)&LPC_TIM1->MR1),                // MAT1.1
        ((uint32_t)&LPC_TIM2->MR0),                // MAT2.0
        ((uint32_t)&LPC_TIM2->MR1),                // MAT2.1
        ((uint32_t)&LPC_TIM3->MR0),                // MAT3.0
        ((uint32_t)&LPC_TIM3->MR1),                // MAT3.1
};
#endif
/**
 * @brief Lookup Table of GPDMA Channel Number matched with
 * GPDMA channel pointer
 */
const LPC_GPDMACH_TypeDef *pGPDMACh[8] = {
        LPC_GPDMACH0,    // GPDMA Channel 0
        LPC_GPDMACH1,    // GPDMA Channel 1
        LPC_GPDMACH2,    // GPDMA Channel 2
        LPC_GPDMACH3,    // GPDMA Channel 3
        LPC_GPDMACH4,    // GPDMA Channel 4
        LPC_GPDMACH5,    // GPDMA Channel 5
        LPC_GPDMACH6,    // GPDMA Channel 6
        LPC_GPDMACH7,    // GPDMA Channel 7
};
/**
 * @brief Optimized Peripheral Source and Destination burst size
 */
const uint8_t GPDMA_LUTPerBurst[] = {
        GPDMA_BSIZE_4,                // SSP0 Tx
        GPDMA_BSIZE_4,                // SSP0 Rx
        GPDMA_BSIZE_4,                // SSP1 Tx
        GPDMA_BSIZE_4,                // SSP1 Rx
        GPDMA_BSIZE_4,                // ADC
        GPDMA_BSIZE_32,             // I2S channel 0
        GPDMA_BSIZE_32,             // I2S channel 1
        GPDMA_BSIZE_1,                // DAC
        GPDMA_BSIZE_1,                // UART0 Tx
        GPDMA_BSIZE_1,                // UART0 Rx
        GPDMA_BSIZE_1,                // UART1 Tx
        GPDMA_BSIZE_1,                // UART1 Rx
        GPDMA_BSIZE_1,                // UART2 Tx
        GPDMA_BSIZE_1,                // UART2 Rx
        GPDMA_BSIZE_1,                // UART3 Tx
        GPDMA_BSIZE_1,                // UART3 Rx
        GPDMA_BSIZE_1,                // MAT0.0
        GPDMA_BSIZE_1,                // MAT0.1
        GPDMA_BSIZE_1,                // MAT1.0
        GPDMA_BSIZE_1,                // MAT1.1
        GPDMA_BSIZE_1,                // MAT2.0
        GPDMA_BSIZE_1,                // MAT2.1
        GPDMA_BSIZE_1,                // MAT3.0
        GPDMA_BSIZE_1,                // MAT3.1
};
/**
 * @brief Optimized Peripheral Source and Destination transfer width
 */
const uint8_t GPDMA_LUTPerWid[] = {
        GPDMA_WIDTH_BYTE,                // SSP0 Tx
        GPDMA_WIDTH_BYTE,                // SSP0 Rx
        GPDMA_WIDTH_BYTE,                // SSP1 Tx
        GPDMA_WIDTH_BYTE,                // SSP1 Rx
        GPDMA_WIDTH_WORD,                // ADC
        GPDMA_WIDTH_WORD,                 // I2S channel 0
        GPDMA_WIDTH_WORD,                 // I2S channel 1
        GPDMA_WIDTH_BYTE,                // DAC
        GPDMA_WIDTH_BYTE,                // UART0 Tx
        GPDMA_WIDTH_BYTE,                // UART0 Rx
        GPDMA_WIDTH_BYTE,                // UART1 Tx
        GPDMA_WIDTH_BYTE,                // UART1 Rx
        GPDMA_WIDTH_BYTE,                // UART2 Tx
        GPDMA_WIDTH_BYTE,                // UART2 Rx
        GPDMA_WIDTH_BYTE,                // UART3 Tx
        GPDMA_WIDTH_BYTE,                // UART3 Rx
        GPDMA_WIDTH_WORD,                // MAT0.0
        GPDMA_WIDTH_WORD,                // MAT0.1
        GPDMA_WIDTH_WORD,                // MAT1.0
        GPDMA_WIDTH_WORD,                // MAT1.1
        GPDMA_WIDTH_WORD,                // MAT2.0
        GPDMA_WIDTH_WORD,                // MAT2.1
        GPDMA_WIDTH_WORD,                // MAT3.0
        GPDMA_WIDTH_WORD,                // MAT3.1
};

/** Interrupt Call-back function pointer data for each GPDMA channel */
static fnGPDMACbs_Type *_apfnGPDMACbs[8] = {
        NULL,     // GPDMA Call-back function pointer for Channel 0
        NULL,     // GPDMA Call-back function pointer for Channel 1
        NULL,     // GPDMA Call-back function pointer for Channel 2
        NULL,     // GPDMA Call-back function pointer for Channel 3
        NULL,     // GPDMA Call-back function pointer for Channel 4
        NULL,     // GPDMA Call-back function pointer for Channel 5
        NULL,     // GPDMA Call-back function pointer for Channel 6
        NULL,     // GPDMA Call-back function pointer for Channel 7
};

/**
 * @}
 */

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

/********************************************************************//**
 * @brief         Initialize GPDMA controller
 * @param         None
 * @return         None
 *********************************************************************/
void GPDMA_Init(void)
{
    /* Enable GPDMA clock */
    CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCGPDMA, ENABLE);

    // Reset all channel configuration register
    LPC_GPDMACH0->DMACCConfig = 0;
    LPC_GPDMACH1->DMACCConfig = 0;
    LPC_GPDMACH2->DMACCConfig = 0;
    LPC_GPDMACH3->DMACCConfig = 0;
    LPC_GPDMACH4->DMACCConfig = 0;
    LPC_GPDMACH5->DMACCConfig = 0;
    LPC_GPDMACH6->DMACCConfig = 0;
    LPC_GPDMACH7->DMACCConfig = 0;

    /* Clear all DMA interrupt and error flag */
    LPC_GPDMA->DMACIntTCClear = 0xFF;
    LPC_GPDMA->DMACIntErrClr = 0xFF;
}

/********************************************************************//**
 * @brief         Setup GPDMA channel peripheral according to the specified
 *               parameters in the GPDMAChannelConfig.
 * @param[in]    GPDMAChannelConfig Pointer to a GPDMA_CH_CFG_Type
 *                                     structure that contains the configuration
 *                                     information for the specified GPDMA channel peripheral.
 * @param[in]    pfnGPDMACbs            Pointer to a GPDMA interrupt call-back function
 * @return        ERROR if selected channel is enabled before
 *                 or SUCCESS if channel is configured successfully
 *********************************************************************/
Status GPDMA_Setup(GPDMA_Channel_CFG_Type *GPDMAChannelConfig, fnGPDMACbs_Type *pfnGPDMACbs)
{
    LPC_GPDMACH_TypeDef *pDMAch;
    uint32_t tmp1, tmp2;

    if (LPC_GPDMA->DMACEnbldChns & (GPDMA_DMACEnbldChns_Ch(GPDMAChannelConfig->ChannelNum))) {
        // This channel is enabled, return ERROR, need to release this channel first
        return ERROR;
    }

    // Get Channel pointer
    pDMAch = (LPC_GPDMACH_TypeDef *) pGPDMACh[GPDMAChannelConfig->ChannelNum];

    // Setup call back function for this channel
    _apfnGPDMACbs[GPDMAChannelConfig->ChannelNum] = pfnGPDMACbs;

    // Reset the Interrupt status
    LPC_GPDMA->DMACIntTCClear = GPDMA_DMACIntTCClear_Ch(GPDMAChannelConfig->ChannelNum);
    LPC_GPDMA->DMACIntErrClr = GPDMA_DMACIntErrClr_Ch(GPDMAChannelConfig->ChannelNum);

    // Clear DMA configure
    pDMAch->DMACCControl = 0x00;
    pDMAch->DMACCConfig = 0x00;

    /* Assign Linker List Item value */
    pDMAch->DMACCLLI = GPDMAChannelConfig->DMALLI;

    /* Set value to Channel Control Registers */
    switch (GPDMAChannelConfig->TransferType)
    {
    // Memory to memory
    case GPDMA_TRANSFERTYPE_M2M:
        // Assign physical source and destination address
        pDMAch->DMACCSrcAddr = GPDMAChannelConfig->SrcMemAddr;
        pDMAch->DMACCDestAddr = GPDMAChannelConfig->DstMemAddr;
        pDMAch->DMACCControl
                = GPDMA_DMACCxControl_TransferSize(GPDMAChannelConfig->TransferSize) \
                        | GPDMA_DMACCxControl_SBSize(GPDMA_BSIZE_32) \
                        | GPDMA_DMACCxControl_DBSize(GPDMA_BSIZE_32) \
                        | GPDMA_DMACCxControl_SWidth(GPDMAChannelConfig->TransferWidth) \
                        | GPDMA_DMACCxControl_DWidth(GPDMAChannelConfig->TransferWidth) \
                        | GPDMA_DMACCxControl_SI \
                        | GPDMA_DMACCxControl_DI \
                        | GPDMA_DMACCxControl_I;
        break;
    // Memory to peripheral
    case GPDMA_TRANSFERTYPE_M2P:
        // Assign physical source
        pDMAch->DMACCSrcAddr = GPDMAChannelConfig->SrcMemAddr;
        // Assign peripheral destination address
        pDMAch->DMACCDestAddr = (uint32_t)GPDMA_LUTPerAddr[GPDMAChannelConfig->DstConn];
        pDMAch->DMACCControl
                = GPDMA_DMACCxControl_TransferSize((uint32_t)GPDMAChannelConfig->TransferSize) \
                        | GPDMA_DMACCxControl_SBSize((uint32_t)GPDMA_LUTPerBurst[GPDMAChannelConfig->DstConn]) \
                        | GPDMA_DMACCxControl_DBSize((uint32_t)GPDMA_LUTPerBurst[GPDMAChannelConfig->DstConn]) \
                        | GPDMA_DMACCxControl_SWidth((uint32_t)GPDMA_LUTPerWid[GPDMAChannelConfig->DstConn]) \
                        | GPDMA_DMACCxControl_DWidth((uint32_t)GPDMA_LUTPerWid[GPDMAChannelConfig->DstConn]) \
                        | GPDMA_DMACCxControl_SI \
                        | GPDMA_DMACCxControl_I;
        break;
    // Peripheral to memory
    case GPDMA_TRANSFERTYPE_P2M:
        // Assign peripheral source address
        pDMAch->DMACCSrcAddr = (uint32_t)GPDMA_LUTPerAddr[GPDMAChannelConfig->SrcConn];
        // Assign memory destination address
        pDMAch->DMACCDestAddr = GPDMAChannelConfig->DstMemAddr;
        pDMAch->DMACCControl
                = GPDMA_DMACCxControl_TransferSize((uint32_t)GPDMAChannelConfig->TransferSize) \
                        | GPDMA_DMACCxControl_SBSize((uint32_t)GPDMA_LUTPerBurst[GPDMAChannelConfig->SrcConn]) \
                        | GPDMA_DMACCxControl_DBSize((uint32_t)GPDMA_LUTPerBurst[GPDMAChannelConfig->SrcConn]) \
                        | GPDMA_DMACCxControl_SWidth((uint32_t)GPDMA_LUTPerWid[GPDMAChannelConfig->SrcConn]) \
                        | GPDMA_DMACCxControl_DWidth((uint32_t)GPDMA_LUTPerWid[GPDMAChannelConfig->SrcConn]) \
                        | GPDMA_DMACCxControl_DI \
                        | GPDMA_DMACCxControl_I;
        break;
    // Peripheral to peripheral
    case GPDMA_TRANSFERTYPE_P2P:
        // Assign peripheral source address
        pDMAch->DMACCSrcAddr = (uint32_t)GPDMA_LUTPerAddr[GPDMAChannelConfig->SrcConn];
        // Assign peripheral destination address
        pDMAch->DMACCDestAddr = (uint32_t)GPDMA_LUTPerAddr[GPDMAChannelConfig->DstConn];
        pDMAch->DMACCControl
                = GPDMA_DMACCxControl_TransferSize((uint32_t)GPDMAChannelConfig->TransferSize) \
                        | GPDMA_DMACCxControl_SBSize((uint32_t)GPDMA_LUTPerBurst[GPDMAChannelConfig->SrcConn]) \
                        | GPDMA_DMACCxControl_DBSize((uint32_t)GPDMA_LUTPerBurst[GPDMAChannelConfig->DstConn]) \
                        | GPDMA_DMACCxControl_SWidth((uint32_t)GPDMA_LUTPerWid[GPDMAChannelConfig->SrcConn]) \
                        | GPDMA_DMACCxControl_DWidth((uint32_t)GPDMA_LUTPerWid[GPDMAChannelConfig->DstConn]) \
                        | GPDMA_DMACCxControl_I;
        break;
    // Do not support any more transfer type, return ERROR
    default:
        return ERROR;
    }

    /* Re-Configure DMA Request Select for source peripheral */
    if (GPDMAChannelConfig->SrcConn > 15)
    {
        LPC_SC->RESERVED9 |= (1<<(GPDMAChannelConfig->SrcConn - 16));
    } else {
        LPC_SC->RESERVED9 &= ~(1<<(GPDMAChannelConfig->SrcConn - 8));
    }

    /* Re-Configure DMA Request Select for Destination peripheral */
    if (GPDMAChannelConfig->DstConn > 15)
    {
        LPC_SC->RESERVED9 |= (1<<(GPDMAChannelConfig->DstConn - 16));
    } else {
        LPC_SC->RESERVED9 &= ~(1<<(GPDMAChannelConfig->DstConn - 8));
    }

    /* Enable DMA channels, little endian */
    LPC_GPDMA->DMACConfig = GPDMA_DMACConfig_E;
    while (!(LPC_GPDMA->DMACConfig & GPDMA_DMACConfig_E));

    // Calculate absolute value for Connection number
    tmp1 = GPDMAChannelConfig->SrcConn;
    tmp1 = ((tmp1 > 15) ? (tmp1 - 8) : tmp1);
    tmp2 = GPDMAChannelConfig->DstConn;
    tmp2 = ((tmp2 > 15) ? (tmp2 - 8) : tmp2);

    // Configure DMA Channel, enable Error Counter and Terminate counter
    pDMAch->DMACCConfig = GPDMA_DMACCxConfig_IE | GPDMA_DMACCxConfig_ITC /*| GPDMA_DMACCxConfig_E*/ \
        | GPDMA_DMACCxConfig_TransferType((uint32_t)GPDMAChannelConfig->TransferType) \
        | GPDMA_DMACCxConfig_SrcPeripheral(tmp1) \
        | GPDMA_DMACCxConfig_DestPeripheral(tmp2);

    return SUCCESS;
}


/*********************************************************************//**
 * @brief        Enable/Disable DMA channel
 * @param[in]    channelNum    GPDMA channel, should be in range from 0 to 7
 * @param[in]    NewState    New State of this command, should be:
 *                     - ENABLE.
 *                     - DISABLE.
 * @return        None
 **********************************************************************/
void GPDMA_ChannelCmd(uint8_t channelNum, FunctionalState NewState)
{
    LPC_GPDMACH_TypeDef *pDMAch;

    // Get Channel pointer
    pDMAch = (LPC_GPDMACH_TypeDef *) pGPDMACh[channelNum];

    if (NewState == ENABLE) {
        pDMAch->DMACCConfig |= GPDMA_DMACCxConfig_E;
    } else {
        pDMAch->DMACCConfig &= ~GPDMA_DMACCxConfig_E;
    }
}

/*********************************************************************//**
 * @brief        Standard GPDMA interrupt handler, this function will check
 *                 all interrupt status of GPDMA channels, then execute the call
 *                 back function id they're already installed
 * @param[in]    None
 * @return        None
 **********************************************************************/
void GPDMA_IntHandler(void)
{
    uint32_t tmp;
    // Scan interrupt pending
    for (tmp = 0; tmp <= 7; tmp++) {
        if (LPC_GPDMA->DMACIntStat & GPDMA_DMACIntStat_Ch(tmp)) {
            // Check counter terminal status
            if (LPC_GPDMA->DMACIntTCStat & GPDMA_DMACIntTCStat_Ch(tmp)) {
                // Clear terminate counter Interrupt pending
                LPC_GPDMA->DMACIntTCClear = GPDMA_DMACIntTCClear_Ch(tmp);
                // Execute call-back function if it is already installed
                if(_apfnGPDMACbs[tmp] != NULL) {
                    _apfnGPDMACbs[tmp](GPDMA_STAT_INTTC);
                }
            }
            // Check error terminal status
            if (LPC_GPDMA->DMACIntErrStat & GPDMA_DMACIntErrStat_Ch(tmp)) {
                // Clear error counter Interrupt pending
                LPC_GPDMA->DMACIntErrClr = GPDMA_DMACIntErrClr_Ch(tmp);
                // Execute call-back function if it is already installed
                if(_apfnGPDMACbs[tmp] != NULL) {
                    _apfnGPDMACbs[tmp](GPDMA_STAT_INTERR);
                }
            }
        }
    }
}


/**
 * @}
 */

#endif /* _GPDMA */

/**
 * @}
 */

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