#include STM32_HAL_H #include <string.h> #include "sdcard.h" #define IRQ_PRI_SDIO 4 #define IRQ_SUBPRI_SDIO 0 static SD_HandleTypeDef sd_handle; int sdcard_init(void) { // invalidate the sd_handle sd_handle.Instance = NULL; GPIO_InitTypeDef GPIO_InitStructure; // configure SD GPIO GPIO_InitStructure.Mode = GPIO_MODE_AF_PP; GPIO_InitStructure.Pull = GPIO_PULLUP; GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_VERY_HIGH; GPIO_InitStructure.Alternate = GPIO_AF12_SDIO; GPIO_InitStructure.Pin = GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12; HAL_GPIO_Init(GPIOC, &GPIO_InitStructure); GPIO_InitStructure.Pin = GPIO_PIN_2; HAL_GPIO_Init(GPIOD, &GPIO_InitStructure); // configure the SD card detect pin GPIO_InitStructure.Mode = GPIO_MODE_INPUT; GPIO_InitStructure.Pull = GPIO_PULLUP; GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_VERY_HIGH; GPIO_InitStructure.Pin = GPIO_PIN_13; HAL_GPIO_Init(GPIOC, &GPIO_InitStructure); return 0; } void HAL_SD_MspInit(SD_HandleTypeDef *hsd) { // enable SDIO clock __HAL_RCC_SDIO_CLK_ENABLE(); // NVIC configuration for SDIO interrupts HAL_NVIC_SetPriority(SDIO_IRQn, IRQ_PRI_SDIO, IRQ_SUBPRI_SDIO); HAL_NVIC_EnableIRQ(SDIO_IRQn); // GPIO have already been initialised by sdcard_init } void HAL_SD_MspDeInit(SD_HandleTypeDef *hsd) { HAL_NVIC_DisableIRQ(SDIO_IRQn); __HAL_RCC_SDIO_CLK_DISABLE(); } bool sdcard_is_present(void) { return GPIO_PIN_RESET == HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_13); } bool sdcard_power_on(void) { if (!sdcard_is_present()) { return false; } if (sd_handle.Instance) { return true; } // SD device interface configuration sd_handle.Instance = SDIO; sd_handle.Init.ClockEdge = SDIO_CLOCK_EDGE_RISING; sd_handle.Init.ClockBypass = SDIO_CLOCK_BYPASS_DISABLE; sd_handle.Init.ClockPowerSave = SDIO_CLOCK_POWER_SAVE_ENABLE; sd_handle.Init.BusWide = SDIO_BUS_WIDE_1B; sd_handle.Init.HardwareFlowControl = SDIO_HARDWARE_FLOW_CONTROL_DISABLE; sd_handle.Init.ClockDiv = SDIO_TRANSFER_CLK_DIV; // init the SD interface, with retry if it's not ready yet HAL_SD_CardInfoTypedef cardinfo; for (int retry = 10; HAL_SD_Init(&sd_handle, &cardinfo) != SD_OK; retry--) { if (retry == 0) { goto error; } HAL_Delay(50); } // configure the SD bus width for wide operation if (HAL_SD_WideBusOperation_Config(&sd_handle, SDIO_BUS_WIDE_4B) != SD_OK) { HAL_SD_DeInit(&sd_handle); goto error; } return true; error: sd_handle.Instance = NULL; return false; } void sdcard_power_off(void) { if (!sd_handle.Instance) { return; } HAL_SD_DeInit(&sd_handle); sd_handle.Instance = NULL; } uint64_t sdcard_get_capacity_in_bytes(void) { if (sd_handle.Instance == NULL) { return 0; } HAL_SD_CardInfoTypedef cardinfo; HAL_SD_Get_CardInfo(&sd_handle, &cardinfo); return cardinfo.CardCapacity; } void SDIO_IRQHandler(void) { HAL_SD_IRQHandler(&sd_handle); } uint32_t sdcard_read_blocks(void *dest, uint32_t block_num, uint32_t num_blocks) { // check that SD card is initialised if (sd_handle.Instance == NULL) { return SD_ERROR; } // check that dest pointer is aligned on a 4-byte boundary if (((uint32_t)dest & 3) != 0) { return SD_INVALID_PARAMETER; } return HAL_SD_ReadBlocks_BlockNumber(&sd_handle, (uint32_t*)dest, block_num, SDCARD_BLOCK_SIZE, num_blocks); } uint32_t sdcard_write_blocks(const void *src, uint32_t block_num, uint32_t num_blocks) { // check that SD card is initialised if (sd_handle.Instance == NULL) { return SD_ERROR; } // check that src pointer is aligned on a 4-byte boundary if (((uint32_t)src & 3) != 0) { return SD_INVALID_PARAMETER; } return HAL_SD_WriteBlocks_BlockNumber(&sd_handle, (uint32_t*)src, block_num, SDCARD_BLOCK_SIZE, num_blocks); }