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eez-flow-template-stm32l496.../Drivers/BSP/STM32L496G-Discovery/stm32l496g_discovery_sd.c

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/**
******************************************************************************
* @file stm32l496g_discovery_sd.c
* @author MCD Application Team
* @brief This file includes the uSD card driver.
@verbatim
==============================================================================
##### How to use this driver #####
==============================================================================
(#) This driver is used to drive the micro SD external card mounted on STM32L496G-DISCOVERY
evaluation board.
(#) This driver does not need a specific component driver for the micro SD device
to be included with.
(#) Initialization steps:
(++) Initialize the micro SD card using the BSP_SD_Init() function. This
function includes the MSP layer hardware resources initialization and the
SDMMC1 interface configuration to interface with the external micro SD. It
also includes the micro SD initialization sequence.
(++) To check the SD card presence you can use the function BSP_SD_IsDetected() which
returns the detection status.
(++) The function BSP_SD_GetCardInfo() is used to get the micro SD card information
which is stored in the structure "HAL_SD_CardInfoTypedef".
(#) Micro SD card operations
(++) The micro SD card can be accessed with read/write block(s) operations once
it is reay for access. The access cand be performed whether using the polling
mode by calling the functions BSP_SD_ReadBlocks()/BSP_SD_WriteBlocks(), or by DMA
transfer using the functions BSP_SD_ReadBlocks_DMA()/BSP_SD_WriteBlocks_DMA()
(++) The DMA transfer complete is used with interrupt mode. Once the SD transfer
is complete, the SD interrupt is handled using the function BSP_SD_IRQHandler(),
the DMA Tx/Rx transfer complete are handled using the functions
BSP_SD_DMA_Tx_IRQHandler()/BSP_SD_DMA_Rx_IRQHandler(). The corresponding user callbacks
are implemented by the user at application level.
(++) The SD erase block(s) is performed using the function BSP_SD_Erase() with specifying
the number of blocks to erase.
(++) The SD runtime status is returned when calling the function BSP_SD_GetStatus().
[..]
@endverbatim
******************************************************************************
* @attention
*
* <h2><center>&copy; Copyright (c) 2017 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32l496g_discovery_io.h"
#include "stm32l496g_discovery_sd.h"
/** @addtogroup BSP
* @{
*/
/** @addtogroup STM32L496G_DISCOVERY
* @{
*/
/** @defgroup STM32L496G_DISCOVERY_SD STM32L496G_DISCOVERY SD
* @{
*/
/* Private variables ---------------------------------------------------------*/
/** @defgroup STM32L496G_SD_Private_Variables Private Variables
* @{
*/
SD_HandleTypeDef uSdHandle;
/**
* @}
*/
/* Private function prototypes -----------------------------------------------*/
/** @defgroup STM32L496G_DISCOVERY_SD_Private_Functions Private Functions
* @{
*/
static void SD_Detect_MspInit(void);
static void SD_Detect_MspDeInit(void);
static HAL_StatusTypeDef SD_DMAConfigRx(SD_HandleTypeDef *hsd);
static HAL_StatusTypeDef SD_DMAConfigTx(SD_HandleTypeDef *hsd);
/**
* @}
*/
/* Exported functions ---------------------------------------------------------*/
/** @addtogroup STM32L496G_DISCOVERY_SD_Exported_Functions
* @{
*/
/**
* @brief Initializes the SD card device.
* @param None
* @retval SD status
*/
uint8_t BSP_SD_Init(void)
{
uint8_t sd_state = MSD_OK;
/* uSD device interface configuration */
uSdHandle.Instance = SDMMC1;
uSdHandle.Init.ClockEdge = SDMMC_CLOCK_EDGE_RISING;
uSdHandle.Init.ClockBypass = SDMMC_CLOCK_BYPASS_DISABLE;
uSdHandle.Init.ClockPowerSave = SDMMC_CLOCK_POWER_SAVE_DISABLE;
uSdHandle.Init.BusWide = SDMMC_BUS_WIDE_1B;
uSdHandle.Init.HardwareFlowControl = SDMMC_HARDWARE_FLOW_CONTROL_ENABLE;
uSdHandle.Init.ClockDiv = SDMMC_TRANSFER_CLK_DIV;
/* Msp SD Detect pin initialization */
SD_Detect_MspInit();
/* Check if the SD card is plugged in the slot */
if (BSP_SD_IsDetected() != SD_PRESENT)
{
return MSD_ERROR_SD_NOT_PRESENT;
}
/* Msp SD initialization */
BSP_SD_MspInit(&uSdHandle, NULL);
/* HAL SD initialization */
if (HAL_SD_Init(&uSdHandle) != HAL_OK)
{
sd_state = MSD_ERROR;
}
/* Configure SD Bus width */
if (sd_state == MSD_OK)
{
/* Enable wide operation */
if (HAL_SD_ConfigWideBusOperation(&uSdHandle, SDMMC_BUS_WIDE_4B) != HAL_OK)
{
sd_state = MSD_ERROR;
}
else
{
sd_state = MSD_OK;
}
}
return sd_state;
}
/**
* @brief DeInitializes the SD card device.
* @param None
* @retval SD status
*/
uint8_t BSP_SD_DeInit(void)
{
uint8_t sd_state = MSD_OK;
uSdHandle.Instance = SDMMC1;
/* HAL SD deinitialization */
if (HAL_SD_DeInit(&uSdHandle) != HAL_OK)
{
sd_state = MSD_ERROR;
}
/* Msp SD deinitialization */
BSP_SD_MspDeInit(&uSdHandle, NULL);
SD_Detect_MspDeInit();
return sd_state;
}
/**
* @brief Configures Interrupt mode for SD detection pin.
* @param None
* @retval IO_OK: if all initializations are OK. Other value if error.
*/
uint8_t BSP_SD_ITConfig(void)
{
/* Check SD card detect pin */
if (BSP_IO_ReadPin(SD_DETECT_PIN) != SD_DETECT_PIN)
{
return BSP_IO_ConfigPin(SD_DETECT_PIN, IO_MODE_IT_RISING_EDGE_PU);
}
else
{
return BSP_IO_ConfigPin(SD_DETECT_PIN, IO_MODE_IT_FALLING_EDGE_PU);
}
}
/**
* @brief Detects if SD card is correctly plugged in the memory slot or not.
* @param None
* @retval Returns if SD is detected or not
*/
uint8_t BSP_SD_IsDetected(void)
{
__IO uint8_t status = SD_PRESENT;
/* Check SD card detect pin */
if (BSP_IO_ReadPin(SD_DETECT_PIN) != GPIO_PIN_RESET)
{
status = SD_NOT_PRESENT;
}
return status;
}
/**
* @brief Reads block(s) from a specified address in an SD card, in polling mode.
* @param pData: Pointer to the buffer that will contain the data to transmit
* @param ReadAddr: Address from where data is to be read
* @param NumOfBlocks: Number of SD blocks to read
* @param Timeout: Timeout for read operation
* @retval SD status
*/
uint8_t BSP_SD_ReadBlocks(uint32_t *pData, uint32_t ReadAddr, uint32_t NumOfBlocks, uint32_t Timeout)
{
HAL_StatusTypeDef sd_state = HAL_OK;
sd_state = HAL_SD_ReadBlocks(&uSdHandle, (uint8_t *)pData, ReadAddr, NumOfBlocks, Timeout);
if (sd_state == HAL_OK)
{
return MSD_OK;
}
else
{
return MSD_ERROR;
}
}
/**
* @brief Writes block(s) to a specified address in an SD card, in polling mode.
* @param pData: Pointer to the buffer that will contain the data to transmit
* @param WriteAddr: Address from where data is to be written
* @param NumOfBlocks: Number of SD blocks to write
* @param Timeout: Timeout for write operation
* @retval SD status
*/
uint8_t BSP_SD_WriteBlocks(uint32_t *pData, uint32_t WriteAddr, uint32_t NumOfBlocks, uint32_t Timeout)
{
HAL_StatusTypeDef sd_state = HAL_OK;
sd_state = HAL_SD_WriteBlocks(&uSdHandle, (uint8_t *)pData, WriteAddr, NumOfBlocks, Timeout);
if (sd_state == HAL_OK)
{
return MSD_OK;
}
else
{
return MSD_ERROR;
}
}
/**
* @brief Reads block(s) from a specified address in an SD card, in DMA mode.
* @param pData: Pointer to the buffer that will contain the data to transmit
* @param ReadAddr: Address from where data is to be read
* @param NumOfBlocks: Number of SD blocks to read
* @retval SD status
*/
uint8_t BSP_SD_ReadBlocks_DMA(uint32_t *pData, uint32_t ReadAddr, uint32_t NumOfBlocks)
{
HAL_StatusTypeDef sd_state = HAL_OK;
/* Invalidate the dma tx handle*/
uSdHandle.hdmatx = NULL;
/* Prepare the dma channel for a read operation */
sd_state = SD_DMAConfigRx(&uSdHandle);
if (sd_state == HAL_OK)
{
/* Read block(s) in DMA transfer mode */
sd_state = HAL_SD_ReadBlocks_DMA(&uSdHandle, (uint8_t *)pData, ReadAddr, NumOfBlocks);
}
if (sd_state == HAL_OK)
{
return MSD_OK;
}
else
{
return MSD_ERROR;
}
}
/**
* @brief Writes block(s) to a specified address in an SD card, in DMA mode.
* @param pData: Pointer to the buffer that will contain the data to transmit
* @param WriteAddr: Address from where data is to be written
* @param NumOfBlocks: Number of SD blocks to write
* @retval SD status
*/
uint8_t BSP_SD_WriteBlocks_DMA(uint32_t *pData, uint32_t WriteAddr, uint32_t NumOfBlocks)
{
HAL_StatusTypeDef sd_state = HAL_OK;
/* Invalidate the dma rx handle*/
uSdHandle.hdmarx = NULL;
/* Prepare the dma channel for a read operation */
sd_state = SD_DMAConfigTx(&uSdHandle);
if (sd_state == HAL_OK)
{
/* Write block(s) in DMA transfer mode */
sd_state = HAL_SD_WriteBlocks_DMA(&uSdHandle, (uint8_t *)pData, WriteAddr, NumOfBlocks);
}
if (sd_state == HAL_OK)
{
return MSD_OK;
}
else
{
return MSD_ERROR;
}
}
/**
* @brief Erases the specified memory area of the given SD card.
* @param StartAddr: Start byte address
* @param EndAddr: End byte address
* @retval SD status
*/
uint8_t BSP_SD_Erase(uint32_t StartAddr, uint32_t EndAddr)
{
HAL_StatusTypeDef sd_state = HAL_OK;
sd_state = HAL_SD_Erase(&uSdHandle, StartAddr, EndAddr);
if (sd_state == HAL_OK)
{
return MSD_OK;
}
else
{
return MSD_ERROR;
}
}
/**
* @brief Handles SD card interrupt request.
* @retval None
*/
void BSP_SD_IRQHandler(void)
{
HAL_SD_IRQHandler(&uSdHandle);
}
/**
* @brief Handles SD DMA Tx transfer interrupt request.
* @retval None
*/
void BSP_SD_DMA_Tx_IRQHandler(void)
{
HAL_DMA_IRQHandler(uSdHandle.hdmatx);
}
/**
* @brief Handles SD DMA Rx transfer interrupt request.
* @retval None
*/
void BSP_SD_DMA_Rx_IRQHandler(void)
{
HAL_DMA_IRQHandler(uSdHandle.hdmarx);
}
/**
* @brief Gets the current SD card data status.
* @param None
* @retval Data transfer state.
*/
uint8_t BSP_SD_GetCardState(void)
{
HAL_SD_CardStateTypedef card_state;
card_state = HAL_SD_GetCardState(&uSdHandle);
if (card_state == HAL_SD_CARD_TRANSFER)
{
return (SD_TRANSFER_OK);
}
else if ((card_state == HAL_SD_CARD_SENDING) ||
(card_state == HAL_SD_CARD_RECEIVING) ||
(card_state == HAL_SD_CARD_PROGRAMMING))
{
return (SD_TRANSFER_BUSY);
}
else
{
return (SD_TRANSFER_ERROR);
}
}
/**
* @brief Get SD information about specific SD card.
* @param CardInfo: Pointer to HAL_SD_CardInfoTypedef structure
* @retval None
*/
void BSP_SD_GetCardInfo(BSP_SD_CardInfo *CardInfo)
{
/* Get SD card Information */
HAL_SD_GetCardInfo(&uSdHandle, CardInfo);
}
/**
* @brief Initializes the SD MSP.
* @note The SDMMC clock configuration done within this function assumes that
* the PLLSAI1 input clock runs at 8 MHz.
* @param hsd: SD handle
* @param Params: Additional parameters
* @retval None
*/
__weak void BSP_SD_MspInit(SD_HandleTypeDef *hsd, void *Params)
{
GPIO_InitTypeDef gpioinitstruct = {0};
RCC_PeriphCLKInitTypeDef RCC_PeriphClkInit;
/* Prevent unused argument(s) compilation warning */
UNUSED(Params);
HAL_RCCEx_GetPeriphCLKConfig(&RCC_PeriphClkInit);
/* Configure the SDMMC1 clock source. The clock is derived from the PLLSAI1 */
/* Hypothesis is that PLLSAI1 VCO input is 8Mhz */
RCC_PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_SDMMC1;
RCC_PeriphClkInit.PLLSAI1.PLLSAI1N = 24;
RCC_PeriphClkInit.PLLSAI1.PLLSAI1Q = 4;
RCC_PeriphClkInit.PLLSAI1.PLLSAI1ClockOut = RCC_PLLSAI1_48M2CLK;
RCC_PeriphClkInit.Sdmmc1ClockSelection = RCC_SDMMC1CLKSOURCE_PLLSAI1;
if (HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphClkInit) != HAL_OK)
{
while (1) {}
}
/* Enable SDMMC1 clock */
__HAL_RCC_SDMMC1_CLK_ENABLE();
/* Enable DMA2 clocks */
SD_DMAx_CLK_ENABLE();
/* Enable GPIOs clock */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
/* Common GPIO configuration */
gpioinitstruct.Mode = GPIO_MODE_AF_PP;
gpioinitstruct.Pull = GPIO_NOPULL;
gpioinitstruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
gpioinitstruct.Alternate = GPIO_AF12_SDMMC1;
/* GPIOC configuration */
gpioinitstruct.Pin = GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12;
HAL_GPIO_Init(GPIOC, &gpioinitstruct);
/* GPIOD configuration */
gpioinitstruct.Pin = GPIO_PIN_2;
HAL_GPIO_Init(GPIOD, &gpioinitstruct);
/* NVIC configuration for SDMMC1 interrupts */
HAL_NVIC_SetPriority(SDMMCx_IRQn, 5, 0);
HAL_NVIC_EnableIRQ(SDMMCx_IRQn);
/* DMA initialization should be done here but , as there is only one channel for RX and TX it is configured and done directly when required*/
}
/**
* @brief De-Initializes the SD MSP.
* @param hsd: SD handle
* @param Params: Additional parameters
* @retval None
*/
__weak void BSP_SD_MspDeInit(SD_HandleTypeDef *hsd, void *Params)
{
GPIO_InitTypeDef gpioinitstruct = {0};
/* Prevent unused argument(s) compilation warning */
UNUSED(Params);
/* Enable SDMMC1 clock */
__HAL_RCC_SDMMC1_CLK_DISABLE();
/* Enable DMA2 clocks */
SD_DMAx_CLK_DISABLE();
/* Enable GPIOs clock */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
/* Common GPIO configuration */
gpioinitstruct.Mode = GPIO_MODE_ANALOG;
gpioinitstruct.Pull = GPIO_NOPULL;
gpioinitstruct.Speed = GPIO_SPEED_FREQ_LOW;
gpioinitstruct.Alternate = 0;
/* GPIOC configuration */
gpioinitstruct.Pin = GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12;
HAL_GPIO_Init(GPIOC, &gpioinitstruct);
/* GPIOD configuration */
gpioinitstruct.Pin = GPIO_PIN_2;
HAL_GPIO_Init(GPIOD, &gpioinitstruct);
/* NVIC configuration for SDMMC1 interrupts */
HAL_NVIC_DisableIRQ(SDMMCx_IRQn);
}
/**
* @brief BSP SD Abort callback
* @retval None
*/
__weak void BSP_SD_AbortCallback(void)
{
}
/**
* @brief BSP Tx Transfer completed callback
* @retval None
*/
__weak void BSP_SD_WriteCpltCallback(void)
{
}
/**
* @brief BSP Rx Transfer completed callback
* @retval None
*/
__weak void BSP_SD_ReadCpltCallback(void)
{
}
/**
* @brief SD Abort callback
* @param hsd: SD handle
* @retval None
*/
void HAL_SD_AbortCallback(SD_HandleTypeDef *hsd)
{
BSP_SD_AbortCallback();
}
/**
* @brief Tx Transfer completed callback
* @param hsd: SD handle
* @retval None
*/
void HAL_SD_TxCpltCallback(SD_HandleTypeDef *hsd)
{
BSP_SD_WriteCpltCallback();
}
/**
* @brief Rx Transfer completed callback
* @param hsd: SD handle
* @retval None
*/
void HAL_SD_RxCpltCallback(SD_HandleTypeDef *hsd)
{
BSP_SD_ReadCpltCallback();
}
/**
* @}
*/
/** @addtogroup STM32L496G_DISCOVERY_SD_Private_Functions
* @{
*/
/**
* @brief Initializes the SD Detect pin MSP.
* @param hsd: SD handle
* @param Params
* @retval None
*/
static void SD_Detect_MspInit(void)
{
if (BSP_IO_Init() == IO_ERROR)
{
BSP_ErrorHandler();
}
BSP_IO_ConfigPin(SD_DETECT_PIN, IO_MODE_INPUT_PU);
}
/**
* @brief Initializes the SD Detect pin MSP.
* @param hsd: SD handle
* @param Params
* @retval None
*/
static void SD_Detect_MspDeInit(void)
{
/* Disable all interrupts */
/*HAL_NVIC_DisableIRQ(MFX_INT_EXTI_IRQn);*/
if (BSP_IO_Init() == IO_ERROR)
{
BSP_ErrorHandler();
}
BSP_IO_ConfigPin(SD_DETECT_PIN, IO_MODE_ANALOG);
}
/**
* @brief Configure the DMA to receive data from the SD card
* @retval
* HAL_ERROR or HAL_OK
*/
static HAL_StatusTypeDef SD_DMAConfigRx(SD_HandleTypeDef *hsd)
{
static DMA_HandleTypeDef hdma_rx;
HAL_StatusTypeDef status = HAL_ERROR;
/* Configure DMA Rx parameters */
hdma_rx.Init.Request = DMA_REQUEST_7;
hdma_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_rx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_rx.Init.MemInc = DMA_MINC_ENABLE;
hdma_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
hdma_rx.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
hdma_rx.Init.Priority = DMA_PRIORITY_VERY_HIGH;
hdma_rx.Instance = SD_DMAx_STREAM;
/* Associate the DMA handle */
__HAL_LINKDMA(hsd, hdmarx, hdma_rx);
/* Stop any ongoing transfer and reset the state*/
HAL_DMA_Abort(&hdma_rx);
/* Deinitialize the Channel for new transfer */
HAL_DMA_DeInit(&hdma_rx);
/* Configure the DMA Channel */
status = HAL_DMA_Init(&hdma_rx);
/* NVIC configuration for DMA transfer complete interrupt */
HAL_NVIC_SetPriority(SD_DMAx_IRQn, 6, 0);
HAL_NVIC_EnableIRQ(SD_DMAx_IRQn);
return (status);
}
/**
* @brief Configure the DMA to transmit data to the SD card
* @retval
* HAL_ERROR or HAL_OK
*/
static HAL_StatusTypeDef SD_DMAConfigTx(SD_HandleTypeDef *hsd)
{
static DMA_HandleTypeDef hdma_tx;
HAL_StatusTypeDef status;
/* Configure DMA Tx parameters */
hdma_tx.Init.Request = DMA_REQUEST_7;
hdma_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
hdma_tx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_tx.Init.MemInc = DMA_MINC_ENABLE;
hdma_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
hdma_tx.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
hdma_tx.Init.Priority = DMA_PRIORITY_VERY_HIGH;
hdma_tx.Instance = SD_DMAx_STREAM;
/* Associate the DMA handle */
__HAL_LINKDMA(hsd, hdmatx, hdma_tx);
/* Stop any ongoing transfer and reset the state*/
HAL_DMA_Abort(&hdma_tx);
/* Deinitialize the Channel for new transfer */
HAL_DMA_DeInit(&hdma_tx);
/* Configure the DMA Channel */
status = HAL_DMA_Init(&hdma_tx);
/* NVIC configuration for DMA transfer complete interrupt */
HAL_NVIC_SetPriority(SD_DMAx_IRQn, 6, 0);
HAL_NVIC_EnableIRQ(SD_DMAx_IRQn);
return (status);
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/