249 lines
7.1 KiB
C
249 lines
7.1 KiB
C
/*-----------------------------------------------------------------------*/
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/* Low level disk I/O module SKELETON for FatFs (C)ChaN, 2019 */
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/*-----------------------------------------------------------------------*/
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/* If a working storage control module is available, it should be */
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/* attached to the FatFs via a glue function rather than modifying it. */
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/* This is an example of glue functions to attach various exsisting */
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/* storage control modules to the FatFs module with a defined API. */
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/*-----------------------------------------------------------------------*/
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#include "ff.h" /* Obtains integer types */
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#include "diskio.h" /* Declarations of disk functions */
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#include <string.h>
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#include "main.h"
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#include "FreeRTOS.h"
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#include "semphr.h"
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#include "elog.h"
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#include "heap.h"
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static const char *TAG = "diskio_sdcard";
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static SemaphoreHandle_t sd_tx_semphr = NULL;
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static SemaphoreHandle_t sd_rx_semphr = NULL;
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void HAL_SD_TxCpltCallback(SD_HandleTypeDef *hsd)
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{
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BaseType_t higher_task_woken = pdFALSE;
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// elog_verbose(TAG, "in write complete ISR");
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if (hsd == &hsd1) {
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xSemaphoreGiveFromISR(sd_tx_semphr, &higher_task_woken);
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}
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portYIELD_FROM_ISR(higher_task_woken);
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}
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void HAL_SD_RxCpltCallback(SD_HandleTypeDef *hsd)
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{
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BaseType_t higher_task_woken = pdFALSE;
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// elog_verbose(TAG, "in read complete ISR");
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if (hsd == &hsd1) {
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xSemaphoreGiveFromISR(sd_rx_semphr, &higher_task_woken);
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}
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portYIELD_FROM_ISR(higher_task_woken);
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}
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/*-----------------------------------------------------------------------*/
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/* Get Drive Status */
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/*-----------------------------------------------------------------------*/
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DSTATUS disk_status (
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BYTE pdrv /* Physical drive nmuber to identify the drive */
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)
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{
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UNUSED(pdrv);
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HAL_SD_CardStateTypeDef card_result = HAL_SD_GetCardState(&hsd1);
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if(card_result != HAL_SD_CARD_TRANSFER) {
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elog_error(TAG, "card status error, status code is %d", card_result);
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return STA_NOINIT;
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}
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return 0;
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}
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/*-----------------------------------------------------------------------*/
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/* Inidialize a Drive */
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/*-----------------------------------------------------------------------*/
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DSTATUS disk_initialize (
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BYTE pdrv /* Physical drive nmuber to identify the drive */
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)
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{
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UNUSED(pdrv);
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sd_tx_semphr = xSemaphoreCreateBinary();
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sd_rx_semphr = xSemaphoreCreateBinary();
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if (sd_tx_semphr == NULL || sd_rx_semphr == NULL) {
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elog_error(TAG, "error while creating interrupt semphr");
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goto ERROR;
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}
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HAL_StatusTypeDef init_result = HAL_SD_InitCard(&hsd1);
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if (init_result != HAL_OK) {
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elog_error(TAG, "error while initializing card");
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goto ERROR;
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}
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init_result = HAL_SD_ConfigWideBusOperation(&hsd1, SDMMC_BUS_WIDE_4B);
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if(init_result != HAL_OK) {
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elog_error(TAG, "error while configuring bus width");
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goto ERROR;
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}
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init_result = HAL_SD_ConfigSpeedBusOperation(&hsd1, SDMMC_SPEED_MODE_AUTO);
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if(init_result != HAL_OK) {
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elog_error(TAG, "error while configuring bus speed");
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goto ERROR;
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}
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return 0;
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ERROR:
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vSemaphoreDelete(sd_tx_semphr);
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vSemaphoreDelete(sd_rx_semphr);
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return STA_NOINIT;
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}
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/*-----------------------------------------------------------------------*/
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/* Read Sector(s) */
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/*-----------------------------------------------------------------------*/
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DRESULT disk_read (
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BYTE pdrv, /* Physical drive nmuber to identify the drive */
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BYTE *buff, /* Data buffer to store read data */
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LBA_t sector, /* Start sector in LBA */
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UINT count /* Number of sectors to read */
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)
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{
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UNUSED(pdrv);
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DRESULT res = RES_OK;
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HAL_StatusTypeDef read_result;
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uint8_t *buff_aligned = NULL;
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// elog_verbose(TAG, "start reading %d block%s@ %d", count, count == 1 ? "" : "s", (int)sector);
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if ((uint32_t)buff % 4 != 0) { //缓冲区4字节未对齐
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// elog_warn(TAG, "unaligned read buffer @ %p", buff);
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buff_aligned = malloc(count * BLOCKSIZE); //申请4字节对齐buffer
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read_result = HAL_SD_ReadBlocks_DMA(&hsd1, buff_aligned, sector, count);
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} else {
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read_result = HAL_SD_ReadBlocks_DMA(&hsd1, buff, sector, count); //使用DMA方式
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}
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xSemaphoreTake(sd_rx_semphr, portMAX_DELAY);
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uint32_t timeout = 100;
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if (read_result == HAL_OK) {
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while(HAL_SD_GetCardState(&hsd1) != HAL_SD_CARD_TRANSFER) { //wait busy
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vTaskDelay(1);
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// elog_verbose(TAG, "waiting for card to get ready");
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if (timeout == 0) {
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res = RES_ERROR;
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}
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}
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} else {
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res = RES_ERROR;
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}
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if ((uint32_t)buff % 4 != 0) { //缓冲区4字节未对齐
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memcpy(buff, buff_aligned, count * BLOCKSIZE);
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free(buff_aligned);
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}
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return res;
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}
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/*-----------------------------------------------------------------------*/
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/* Write Sector(s) */
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/*-----------------------------------------------------------------------*/
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#if FF_FS_READONLY == 0
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DRESULT disk_write (
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BYTE pdrv, /* Physical drive nmuber to identify the drive */
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const BYTE *buff, /* Data to be written */
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LBA_t sector, /* Start sector in LBA */
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UINT count /* Number of sectors to write */
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)
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{
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DRESULT res = RES_OK;
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HAL_StatusTypeDef write_result;
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// elog_verbose(TAG, "start writing %d block%s@ %d", count, count == 1 ? "" : "s", (int)sector);
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if ((uint32_t)buff % 4 == 0) { //缓冲区4字节对齐
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write_result = HAL_SD_WriteBlocks_DMA(&hsd1, buff, sector, count); //使用DMA方式
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} else {
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write_result = HAL_SD_WriteBlocks_IT(&hsd1, buff, sector, count); //使用查询方式
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elog_warn(TAG, "unaligned buffer access@%p, fall back to polling method", buff);
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}
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xSemaphoreTake(sd_tx_semphr, portMAX_DELAY);
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uint32_t timeout = 100;
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if (write_result == HAL_OK) {
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while(HAL_SD_GetCardState(&hsd1) != HAL_SD_CARD_TRANSFER) { //wait busy
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vTaskDelay(1);
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// elog_verbose(TAG, "waiting for card to get ready");
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if (timeout == 0) {
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res = RES_ERROR;
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}
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}
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} else {
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res = RES_ERROR;
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}
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return res;
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}
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#endif
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/*-----------------------------------------------------------------------*/
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/* Miscellaneous Functions */
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/*-----------------------------------------------------------------------*/
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DRESULT disk_ioctl (
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BYTE pdrv, /* Physical drive nmuber (0..) */
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BYTE cmd, /* Control code */
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void *buff /* Buffer to send/receive control data */
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)
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{
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DRESULT res = RES_ERROR;
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HAL_SD_CardInfoTypeDef card_info;
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switch (cmd) {
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/* Make sure that no pending write process */
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case CTRL_SYNC:
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res = RES_OK;
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break;
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/* Get number of sectors on the disk (DWORD) */
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case GET_SECTOR_COUNT:
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HAL_SD_GetCardInfo(&hsd1, &card_info);
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*(DWORD *)buff = card_info.LogBlockNbr;
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res = RES_OK;
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break;
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/* Get R/W sector size (WORD) */
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case GET_SECTOR_SIZE:
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/* Get erase block size in unit of sector (DWORD) */
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case GET_BLOCK_SIZE:
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HAL_SD_GetCardInfo(&hsd1, &card_info);
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*(WORD *)buff = card_info.LogBlockSize;
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res = RES_OK;
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break;
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default:
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res = RES_PARERR;
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}
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return res;
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}
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