stm32f4_sdio_sd_lld.c

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#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#include "stm32f4xx.h"
#include "stm32f4_sdio_sd.h"

void SD_LowLevel_DeInit(void) {
    GPIO_InitTypeDef GPIO_InitStructure;

    /* Disable SDIO Clock */
    SDIO_ClockCmd(DISABLE);

    /* Set Power State to OFF */
    SDIO_SetPowerState(SDIO_PowerState_OFF );

    /* DeInitializes the SDIO peripheral */
    SDIO_DeInit();

    /* Disable the SDIO APB2 Clock */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SDIO, DISABLE);

    GPIO_PinAFConfig(GPIOC, GPIO_PinSource8, GPIO_AF_MCO );
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource9, GPIO_AF_MCO );
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_MCO );
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_MCO );
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource12, GPIO_AF_MCO );
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource2, GPIO_AF_MCO );

    /* Configure PC.08, PC.09, PC.10, PC.11 pins: D0, D1, D2, D3 pins */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10
            | GPIO_Pin_11;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(GPIOC, &GPIO_InitStructure);

    /* Configure PD.02 CMD line */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_Init(GPIOD, &GPIO_InitStructure);

    /* Configure PC.12 pin: CLK pin */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
    GPIO_Init(GPIOC, &GPIO_InitStructure);
}

void SD_LowLevel_Init(void) {
    GPIO_InitTypeDef GPIO_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    /* Configure the NVIC Preemption Priority Bits */
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4 );

    NVIC_InitStructure.NVIC_IRQChannel = SDIO_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    /* GPIOC and GPIOD Periph clock enable */
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC | RCC_AHB1Periph_GPIOD, ENABLE);
#if SD_DETECT_USE
    RCC_AHB1PeriphClockCmd(SD_DETECT_GPIO_CLK, ENABLE);
#endif

    GPIO_PinAFConfig(GPIOC, GPIO_PinSource8, GPIO_AF_SDIO );
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource9, GPIO_AF_SDIO );
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_SDIO );
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_SDIO );
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource12, GPIO_AF_SDIO );
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource2, GPIO_AF_SDIO );

    /* Configure PC.08, PC.09, PC.10, PC.11 pins: D0, D1, D2, D3 pins */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10
            | GPIO_Pin_11;
    GPIO_InitStructure.GPIO_Speed = GPIO_Medium_Speed;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(GPIOC, &GPIO_InitStructure);

    /* Configure PD.02 CMD line */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_Init(GPIOD, &GPIO_InitStructure);

    /* Configure PC.12 pin: CLK pin */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(GPIOC, &GPIO_InitStructure);

    /* Configure SD_SPI_DETECT_PIN pin: SD Card detect pin */
#if SD_DETECT_USE
    GPIO_InitStructure.GPIO_Pin = SD_DETECT_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(SD_DETECT_GPIO_PORT, &GPIO_InitStructure);
#endif

    /* Enable the SDIO APB2 Clock */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SDIO, ENABLE);

    /* Enable the DMA2 Clock */
    RCC_AHB1PeriphClockCmd(SD_SDIO_DMA_CLK, ENABLE);
}

void SD_LowLevel_DMA_TxConfig(uint32_t *BufferSRC, uint32_t BufferSize) {
    DMA_InitTypeDef SDDMA_InitStructure;

    DMA_ClearFlag(
            SD_SDIO_DMA_STREAM,
            SD_SDIO_DMA_FLAG_FEIF | SD_SDIO_DMA_FLAG_DMEIF
                    | SD_SDIO_DMA_FLAG_TEIF | SD_SDIO_DMA_FLAG_HTIF
                    | SD_SDIO_DMA_FLAG_TCIF );

    /* DMA2 Stream3  or Stream6 disable */
    DMA_Cmd(SD_SDIO_DMA_STREAM, DISABLE);

    /* DMA2 Stream3  or Stream6 Config */
    DMA_DeInit(SD_SDIO_DMA_STREAM );

    SDDMA_InitStructure.DMA_Channel = SD_SDIO_DMA_CHANNEL;
    SDDMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) SDIO_FIFO_ADDRESS;
    SDDMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t) BufferSRC;
    SDDMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
    SDDMA_InitStructure.DMA_BufferSize = 0;
    SDDMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    SDDMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    SDDMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
    SDDMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
    SDDMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    SDDMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
    SDDMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable;
    SDDMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
    SDDMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_INC4;
    SDDMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_INC4;
    DMA_Init(SD_SDIO_DMA_STREAM, &SDDMA_InitStructure);
    DMA_ITConfig(SD_SDIO_DMA_STREAM, DMA_IT_TC, ENABLE);
    DMA_FlowControllerConfig(SD_SDIO_DMA_STREAM, DMA_FlowCtrl_Peripheral );

    /* DMA2 Stream3  or Stream6 enable */
    DMA_Cmd(SD_SDIO_DMA_STREAM, ENABLE);

}

void SD_LowLevel_DMA_RxConfig(uint32_t *BufferDST, uint32_t BufferSize) {
    DMA_InitTypeDef SDDMA_InitStructure;

    DMA_ClearFlag(
            SD_SDIO_DMA_STREAM,
            SD_SDIO_DMA_FLAG_FEIF | SD_SDIO_DMA_FLAG_DMEIF
                    | SD_SDIO_DMA_FLAG_TEIF | SD_SDIO_DMA_FLAG_HTIF
                    | SD_SDIO_DMA_FLAG_TCIF );

    /* DMA2 Stream3  or Stream6 disable */
    DMA_Cmd(SD_SDIO_DMA_STREAM, DISABLE);

    /* DMA2 Stream3 or Stream6 Config */
    DMA_DeInit(SD_SDIO_DMA_STREAM );

    SDDMA_InitStructure.DMA_Channel = SD_SDIO_DMA_CHANNEL;
    SDDMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) SDIO_FIFO_ADDRESS;
    SDDMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t) BufferDST;
    SDDMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
    SDDMA_InitStructure.DMA_BufferSize = 0;
    SDDMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    SDDMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    SDDMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
    SDDMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
    SDDMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    SDDMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
    SDDMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable;
    SDDMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
    SDDMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_INC4;
    SDDMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_INC4;
    DMA_Init(SD_SDIO_DMA_STREAM, &SDDMA_InitStructure);
    DMA_ITConfig(SD_SDIO_DMA_STREAM, DMA_IT_TC, ENABLE);
    DMA_FlowControllerConfig(SD_SDIO_DMA_STREAM, DMA_FlowCtrl_Peripheral );

    /* DMA2 Stream3 or Stream6 enable */
    DMA_Cmd(SD_SDIO_DMA_STREAM, ENABLE);
}

void SDIO_IRQHandler(void) {
    SD_ProcessIRQSrc();
}

void SD_SDIO_DMA_IRQHANDLER(void) {
    SD_ProcessDMAIRQ();
}