182 lines
7.0 KiB
C
182 lines
7.0 KiB
C
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#include "sdio_lowlevel.h"
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#include "stm32f4xx_sdio.h"
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#include "stm32f4xx_dma.h"
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NVIC_InitTypeDef NVIC_InitStructure;
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/**
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* @brief DeInitializes the SDIO interface.
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* @param None
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* @retval None
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*/
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void SD_LowLevel_DeInit(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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/*!< Disable SDIO Clock */
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SDIO_ClockCmd(DISABLE);
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/*!< Set Power State to OFF */
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SDIO_SetPowerState(SDIO_PowerState_OFF);
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/*!< DeInitializes the SDIO peripheral */
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SDIO_DeInit();
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/* Disable the SDIO APB2 Clock */
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_SDIO, DISABLE);
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GPIO_PinAFConfig(GPIOC, GPIO_PinSource8, GPIO_AF_MCO);
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GPIO_PinAFConfig(GPIOC, GPIO_PinSource9, GPIO_AF_MCO);
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GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_MCO);
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GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_MCO);
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GPIO_PinAFConfig(GPIOC, GPIO_PinSource12, GPIO_AF_MCO);
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GPIO_PinAFConfig(GPIOD, GPIO_PinSource2, GPIO_AF_MCO);
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/* Configure PC.08, PC.09, PC.10, PC.11 pins: D0, D1, D2, D3 pins */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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GPIO_Init(GPIOC, &GPIO_InitStructure);
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/* Configure PD.02 CMD line */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
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GPIO_Init(GPIOD, &GPIO_InitStructure);
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/* Configure PC.12 pin: CLK pin */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
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GPIO_Init(GPIOC, &GPIO_InitStructure);
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}
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/**
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* @brief Initializes the SD Card and put it into StandBy State (Ready for
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* data transfer).
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* @param None
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* @retval None
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*/
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void SD_LowLevel_Init(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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/* GPIOC and GPIOD Periph clock enable */
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RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC | RCC_AHB1Periph_GPIOD | SD_DETECT_GPIO_CLK, ENABLE);
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GPIO_PinAFConfig(GPIOC, GPIO_PinSource8, GPIO_AF_SDIO);
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GPIO_PinAFConfig(GPIOC, GPIO_PinSource9, GPIO_AF_SDIO);
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GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_SDIO);
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GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_SDIO);
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GPIO_PinAFConfig(GPIOC, GPIO_PinSource12, GPIO_AF_SDIO);
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GPIO_PinAFConfig(GPIOD, GPIO_PinSource2, GPIO_AF_SDIO);
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/* Configure PC.08, PC.09, PC.10, PC.11 pins: D0, D1, D2, D3 pins */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
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GPIO_Init(GPIOC, &GPIO_InitStructure);
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/* Configure PD.02 CMD line */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
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GPIO_Init(GPIOD, &GPIO_InitStructure);
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/* Configure PC.12 pin: CLK pin */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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GPIO_Init(GPIOC, &GPIO_InitStructure);
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/*!< Configure SD_SPI_DETECT_PIN pin: SD Card detect pin */
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GPIO_InitStructure.GPIO_Pin = SD_DETECT_PIN;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
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GPIO_Init(SD_DETECT_GPIO_PORT, &GPIO_InitStructure);
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/* Enable the SDIO APB2 Clock */
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_SDIO, ENABLE);
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/* Enable the DMA2 Clock */
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RCC_AHB1PeriphClockCmd(SD_SDIO_DMA_CLK, ENABLE);
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}
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/**
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* @brief Configures the DMA2 Channel4 for SDIO Tx request.
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* @param BufferSRC: pointer to the source buffer
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* @param BufferSize: buffer size
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* @retval None
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*/
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void SD_LowLevel_DMA_TxConfig(uint32_t *BufferSRC, uint32_t BufferSize)
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{
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DMA_InitTypeDef SDDMA_InitStructure;
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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);
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/* DMA2 Stream3 or Stream6 disable */
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DMA_Cmd(SD_SDIO_DMA_STREAM, DISABLE);
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/* DMA2 Stream3 or Stream6 Config */
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DMA_DeInit(SD_SDIO_DMA_STREAM);
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SDDMA_InitStructure.DMA_Channel = SD_SDIO_DMA_CHANNEL;
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SDDMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SDIO_FIFO_ADDRESS;
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SDDMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)BufferSRC;
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SDDMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
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SDDMA_InitStructure.DMA_BufferSize = BufferSize;
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SDDMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
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SDDMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
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SDDMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
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SDDMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
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SDDMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
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SDDMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
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SDDMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable;
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SDDMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
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SDDMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_INC4;
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SDDMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_INC4;
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DMA_Init(SD_SDIO_DMA_STREAM, &SDDMA_InitStructure);
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DMA_ITConfig(SD_SDIO_DMA_STREAM, DMA_IT_TC, ENABLE);
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DMA_FlowControllerConfig(SD_SDIO_DMA_STREAM, DMA_FlowCtrl_Peripheral);
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/* DMA2 Stream3 or Stream6 enable */
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DMA_Cmd(SD_SDIO_DMA_STREAM, ENABLE);
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}
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/**
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* @brief Configures the DMA2 Channel4 for SDIO Rx request.
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* @param BufferDST: pointer to the destination buffer
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* @param BufferSize: buffer size
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* @retval None
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*/
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void SD_LowLevel_DMA_RxConfig(uint32_t *BufferDST, uint32_t BufferSize)
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{
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DMA_InitTypeDef SDDMA_InitStructure;
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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);
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/* DMA2 Stream3 or Stream6 disable */
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DMA_Cmd(SD_SDIO_DMA_STREAM, DISABLE);
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/* DMA2 Stream3 or Stream6 Config */
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DMA_DeInit(SD_SDIO_DMA_STREAM);
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SDDMA_InitStructure.DMA_Channel = SD_SDIO_DMA_CHANNEL;
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SDDMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SDIO_FIFO_ADDRESS;
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SDDMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)BufferDST;
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SDDMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
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SDDMA_InitStructure.DMA_BufferSize = BufferSize;
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SDDMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
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SDDMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
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SDDMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
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SDDMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
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SDDMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
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SDDMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
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SDDMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable;
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SDDMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
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SDDMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_INC4;
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SDDMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_INC4;
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DMA_Init(SD_SDIO_DMA_STREAM, &SDDMA_InitStructure);
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DMA_ITConfig(SD_SDIO_DMA_STREAM, DMA_IT_TC, ENABLE);
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DMA_FlowControllerConfig(SD_SDIO_DMA_STREAM, DMA_FlowCtrl_Peripheral);
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/* DMA2 Stream3 or Stream6 enable */
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DMA_Cmd(SD_SDIO_DMA_STREAM, ENABLE);
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}
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