{"id":10021270,"date":"2026-02-23T12:11:44","date_gmt":"2026-02-23T04:11:44","guid":{"rendered":"https:\/\/itmax.cn\/?p=10021270"},"modified":"2026-02-23T12:11:44","modified_gmt":"2026-02-23T04:11:44","slug":"sd%e5%92%8ctf%e5%8d%a1%e7%9a%84%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10021270","title":{"rendered":"SD\u548cTF\u5361\u7684\u5e94\u7528"},"content":{"rendered":"

\u5927\u5bb6\u597d\uff0c\u6211\u662f\u826f\u8bb8<\/p>\n

\u5728\u5d4c\u5165\u5f0f\u5f00\u53d1\u4e2d\uff0c\u5b58\u50a8\u5668\u7684\u9009\u62e9\u5f80\u5f80\u51b3\u5b9a\u4e86\u4ea7\u54c1\u7684\u6210\u672c\u548c\u6027\u80fd\u3002<\/p>\n

\u4f5c\u4e3a\u4e00\u540d\u4ece\u4e8b\u5d4c\u5165\u5f0f\u5f00\u53d1\u591a\u5e74\u7684\u7a0b\u5e8f\u5458\uff0c\u6211\u5728\u9879\u76ee\u4e2d\u7ecf\u5e38\u9700\u8981\u4e3a\u8bbe\u5907\u9009\u62e9\u5408\u9002\u7684\u5b58\u50a8\u65b9\u6848\u3002<\/p>\n

SD \u5361\u548c TF \u5361\u4f5c\u4e3a\u4e24\u79cd\u6700\u5e38\u89c1\u7684\u53ef\u79fb\u52a8\u5b58\u50a8\u4ecb\u8d28\uff0c\u5b83\u4eec\u7684\u5e94\u7528\u573a\u666f\u5404\u6709\u5343\u79cb\u3002<\/p>\n

\u4eca\u5929\u5c31\u6765\u548c\u5927\u5bb6\u804a\u804a\u8fd9\u4e24\u79cd\u5b58\u50a8\u5361\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u7684\u5e94\u7528\uff0c\u4ee5\u53ca\u6211\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u79ef\u7d2f\u7684\u4e00\u4e9b\u7ecf\u9a8c\u3002<\/p>\n

1. SD \u5361\u548c TF \u5361\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n

1.1 \u4ec0\u4e48\u662f SD \u5361<\/h3>\n

SD \u5361\uff08Secure Digital Card\uff09\u662f\u4e00\u79cd\u57fa\u4e8e\u534a\u5bfc\u4f53\u95ea\u5b58\u7684\u5b58\u50a8\u5361\uff0c\u7531\u677e\u4e0b\u3001\u4e1c\u829d\u548c SanDisk \u516c\u53f8\u4e8e 1999 \u5e74\u8054\u5408\u5f00\u53d1\u3002<\/p>\n

SD \u5361\u7684\u6807\u51c6\u5c3a\u5bf8\u4e3a 32mm\u00d724mm\u00d72.1mm\uff0c\u76f8\u5bf9\u6765\u8bf4\u4f53\u79ef\u8f83\u5927\uff0c\u4f46\u63a5\u53e3\u7a33\u5b9a\u6027\u597d\uff0c\u9002\u5408\u9700\u8981\u9891\u7e41\u63d2\u62d4\u7684\u5e94\u7528\u573a\u666f\u3002<\/p>\n

\u5728\u6211\u65e9\u671f\u505a\u6c7d\u8f66\u7535\u5b50\u9879\u76ee\u65f6\uff0c\u8f66\u8f7d\u5bfc\u822a\u7cfb\u7edf\u666e\u904d\u4f7f\u7528 SD \u5361\u6765\u5b58\u50a8\u5730\u56fe\u6570\u636e\u3002<\/p>\n

\u8fd9\u662f\u56e0\u4e3a SD \u5361\u7684\u7269\u7406\u5c3a\u5bf8\u8f83\u5927\uff0c\u63d2\u62d4\u65f6\u4e0d\u5bb9\u6613\u635f\u574f\uff0c\u800c\u4e14\u5f53\u65f6 SD \u5361\u7684\u5bb9\u91cf\u5df2\u7ecf\u80fd\u591f\u6ee1\u8db3\u5730\u56fe\u5b58\u50a8\u7684\u9700\u6c42\u3002<\/p>\n

SD \u5361\u652f\u6301 SPI \u548c SDIO \u4e24\u79cd\u901a\u4fe1\u534f\u8bae\uff0c\u5176\u4e2d SDIO \u534f\u8bae\u7684\u4f20\u8f93\u901f\u5ea6\u66f4\u5feb\uff0c\u53ef\u4ee5\u8fbe\u5230 104MB\/s \u751a\u81f3\u66f4\u9ad8\u3002<\/p>\n

1.2 \u4ec0\u4e48\u662f TF \u5361<\/h3>\n

TF \u5361\uff08TransFlash Card\uff09\uff0c\u540e\u6765\u88ab SD \u534f\u4f1a\u6536\u7f16\u540e\u6539\u540d\u4e3a microSD \u5361\uff0c\u662f\u4e00\u79cd\u8d85\u5c0f\u578b\u7684\u5b58\u50a8\u5361\u3002<\/p>\n

\u5b83\u7684\u5c3a\u5bf8\u4ec5\u4e3a 15mm\u00d711mm\u00d71mm\uff0c\u662f\u76ee\u524d\u6700\u5c0f\u7684\u5b58\u50a8\u5361\u683c\u5f0f\u4e4b\u4e00\u3002<\/p>\n

TF \u5361\u867d\u7136\u4f53\u79ef\u5c0f\uff0c\u4f46\u529f\u80fd\u548c SD \u5361\u5b8c\u5168\u76f8\u540c\uff0c\u53ea\u662f\u7269\u7406\u5c3a\u5bf8\u4e0d\u540c\u800c\u5df2\u3002<\/p>\n

\u5728\u6211\u76ee\u524d\u7684\u9879\u76ee\u4e2d\uff0c\u51e0\u4e4e\u6240\u6709\u7684\u4fbf\u643a\u5f0f\u8bbe\u5907\u90fd\u91c7\u7528 TF \u5361\u4f5c\u4e3a\u5b58\u50a8\u65b9\u6848\u3002<\/p>\n

\u6bd4\u5982\u6211\u4eec\u4e3a\u5ba2\u6237\u5f00\u53d1\u7684\u4e00\u6b3e\u5de5\u4e1a\u76f8\u673a\uff0c\u5c31\u4f7f\u7528\u4e86 TF \u5361\u6765\u5b58\u50a8\u62cd\u6444\u7684\u56fe\u50cf\u6570\u636e\u3002<\/p>\n

TF \u5361\u7684\u5c0f\u5de7\u4f53\u79ef\u4f7f\u5f97\u8bbe\u5907\u53ef\u4ee5\u505a\u5f97\u66f4\u52a0\u7d27\u51d1\uff0c\u8fd9\u5728\u7a7a\u95f4\u53d7\u9650\u7684\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u662f\u975e\u5e38\u91cd\u8981\u7684\u4f18\u52bf\u3002<\/p>\n

1.3 \u4e24\u8005\u7684\u4e3b\u8981\u533a\u522b<\/h3>\n

\u4ece\u6280\u672f\u89d2\u5ea6\u6765\u770b\uff0cSD \u5361\u548c TF \u5361\u5728\u7535\u6c14\u7279\u6027\u548c\u901a\u4fe1\u534f\u8bae\u4e0a\u57fa\u672c\u76f8\u540c\uff0c\u4e3b\u8981\u533a\u522b\u5728\u4e8e\u7269\u7406\u5c3a\u5bf8\u3002<\/p>\n

SD \u5361\u66f4\u5927\u66f4\u539a\uff0c\u63a5\u89e6\u9762\u79ef\u5927\uff0c\u63d2\u62d4\u65f6\u7684\u673a\u68b0\u5f3a\u5ea6\u66f4\u597d\u3002<\/p>\n

TF \u5361\u5219\u66f4\u5c0f\u66f4\u8584\uff0c\u9002\u5408\u7a7a\u95f4\u53d7\u9650\u7684\u5e94\u7528\u3002<\/p>\n

\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u8f6c\u63a5\u5361\u5c06 TF \u5361\u8f6c\u6362\u4e3a SD \u5361\u4f7f\u7528\uff0c\u4f46\u53cd\u8fc7\u6765\u5c31\u4e0d\u884c\u4e86\u3002<\/p>\n

\u53e6\u5916\u4e00\u4e2a\u91cd\u8981\u533a\u522b\u662f\u6210\u672c\u3002<\/p>\n

\u7531\u4e8e TF \u5361\u7684\u751f\u4ea7\u5de5\u827a\u66f4\u590d\u6742\uff0c\u76f8\u540c\u5bb9\u91cf\u548c\u901f\u5ea6\u7b49\u7ea7\u7684 TF \u5361\u901a\u5e38\u6bd4 SD \u5361\u8d35\u4e00\u4e9b\u3002<\/p>\n

\u4f46\u5728\u6279\u91cf\u91c7\u8d2d\u65f6\uff0c\u8fd9\u4e2a\u4ef7\u683c\u5dee\u5f02\u4f1a\u7f29\u5c0f\u3002<\/p>\n

\u6211\u5728\u7ed9\u5ba2\u6237\u505a\u6210\u672c\u5206\u6790\u65f6\uff0c\u901a\u5e38\u4f1a\u7efc\u5408\u8003\u8651\u5b58\u50a8\u5361\u672c\u8eab\u7684\u4ef7\u683c\u3001\u5361\u5ea7\u7684\u4ef7\u683c\u4ee5\u53ca PCB \u677f\u7684\u7a7a\u95f4\u6210\u672c\u3002<\/p>\n

2. SD \u5361\u548c TF \u5361\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u7684\u5e94\u7528<\/h2>\n

2.1 \u6570\u636e\u5b58\u50a8\u5e94\u7528<\/h3>\n

\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\uff0cSD \u5361\u548c TF \u5361\u6700\u57fa\u672c\u7684\u5e94\u7528\u5c31\u662f\u6570\u636e\u5b58\u50a8\u3002<\/p>\n

\u6211\u5728\u505a\u8fc7\u7684\u9879\u76ee\u4e2d\uff0c\u6709\u5f88\u591a\u8bbe\u5907\u9700\u8981\u8bb0\u5f55\u8fd0\u884c\u65e5\u5fd7\u3001\u4f20\u611f\u5668\u6570\u636e\u6216\u8005\u7528\u6237\u914d\u7f6e\u4fe1\u606f\u3002<\/p>\n

\u6bd4\u5982\u6211\u4eec\u5f00\u53d1\u7684\u4e00\u6b3e\u73af\u5883\u76d1\u6d4b\u8bbe\u5907\uff0c\u9700\u8981\u6bcf\u9694 10 \u79d2\u949f\u8bb0\u5f55\u4e00\u6b21\u6e29\u5ea6\u3001\u6e7f\u5ea6\u3001PM2.5 \u7b49\u6570\u636e\uff0c\u4e00\u5929\u4e0b\u6765\u5c31\u4f1a\u4ea7\u751f\u5927\u91cf\u7684\u6570\u636e\u3002<\/p>\n

\u4f7f\u7528 TF \u5361\u5b58\u50a8\u8fd9\u4e9b\u6570\u636e\uff0c\u4e0d\u4ec5\u6210\u672c\u4f4e\u5ec9\uff0c\u800c\u4e14\u53ef\u4ee5\u65b9\u4fbf\u5730\u5c06\u6570\u636e\u5bfc\u51fa\u5230\u7535\u8111\u8fdb\u884c\u5206\u6790\u3002<\/p>\n

\u5728 STM32 \u5e73\u53f0\u4e0a\u5b9e\u73b0 SD \u5361\u7684\u57fa\u672c\u8bfb\u5199\u64cd\u4f5c\uff0c\u4f7f\u7528 HAL \u5e93\u53ef\u4ee5\u8fd9\u6837\u505a\uff1a<\/p>\n

#include "stm32f4xx_hal.h"\n#include "fatfs.h"\n\u200b\n\/\/ SD\u5361\u53e5\u67c4\nSD_HandleTypeDef hsd;\n\u200b\n\/\/ \u521d\u59cb\u5316SD\u5361\nHAL_StatusTypeDef SD_Init(void)\n{\n    hsd.Instance = SDIO;\n    hsd.Init.ClockEdge = SDIO_CLOCK_EDGE_RISING;\n    hsd.Init.ClockBypass = SDIO_CLOCK_BYPASS_DISABLE;\n    hsd.Init.ClockPowerSave = SDIO_CLOCK_POWER_SAVE_DISABLE;\n    hsd.Init.BusWide = SDIO_BUS_WIDE_1B;\n    hsd.Init.HardwareFlowControl = SDIO_HARDWARE_FLOW_CONTROL_DISABLE;\n    hsd.Init.ClockDiv = 0;\n    \n    if (HAL_SD_Init(&hsd) != HAL_OK)\n    {\n        return HAL_ERROR;\n    }\n    \n    \/\/ \u914d\u7f6e\u4e3a4\u4f4d\u603b\u7ebf\u5bbd\u5ea6\u4ee5\u63d0\u9ad8\u901f\u5ea6\n    if (HAL_SD_ConfigWideBusOperation(&hsd\uff0c SDIO_BUS_WIDE_4B) != HAL_OK)\n    {\n        return HAL_ERROR;\n    }\n    \n    return HAL_OK;\n}\n\u200b\n\/\/ \u5199\u5165\u6570\u636e\u5230SD\u5361\nHAL_StatusTypeDef SD_WriteData(uint32_t blockAddr\uff0c uint8_t *pData\uff0c uint32_t numBlocks)\n{\n    HAL_StatusTypeDef status;\n    \n    status = HAL_SD_WriteBlocks(&hsd\uff0c pData\uff0c blockAddr\uff0c numBlocks\uff0c HAL_MAX_DELAY);\n    \n    if (status == HAL_OK)\n    {\n        \/\/ \u7b49\u5f85\u5199\u5165\u5b8c\u6210\n        while(HAL_SD_GetCardState(&hsd) != HAL_SD_CARD_TRANSFER)\n        {\n        }\n    }\n    \n    return status;\n}\n\u200b\n\/\/ \u4eceSD\u5361\u8bfb\u53d6\u6570\u636e\nHAL_StatusTypeDef SD_ReadData(uint32_t blockAddr\uff0c uint8_t *pData\uff0c uint32_t numBlocks)\n{\n    HAL_StatusTypeDef status;\n    \n    status = HAL_SD_ReadBlocks(&hsd\uff0c pData\uff0c blockAddr\uff0c numBlocks\uff0c HAL_MAX_DELAY);\n    \n    if (status == HAL_OK)\n    {\n        \/\/ \u7b49\u5f85\u8bfb\u53d6\u5b8c\u6210\n        while(HAL_SD_GetCardState(&hsd) != HAL_SD_CARD_TRANSFER)\n        {\n        }\n    }\n    \n    return status;\n}<\/code><\/pre>\n
\u8fd9\u6bb5\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u5728 STM32 \u4e0a\u521d\u59cb\u5316 SD \u5361\u5e76\u8fdb\u884c\u57fa\u672c\u7684\u8bfb\u5199\u64cd\u4f5c\u3002<\/p>\n
\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\uff0c\u6211\u901a\u5e38\u4f1a\u5728\u6b64\u57fa\u7840\u4e0a\u96c6\u6210 FatFS \u6587\u4ef6\u7cfb\u7edf\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u50cf\u64cd\u4f5c\u666e\u901a\u6587\u4ef6\u4e00\u6837\u64cd\u4f5c SD \u5361\u4e86\u3002<\/p>\n
2.2 \u56fa\u4ef6\u5347\u7ea7\u5e94\u7528<\/h3>\n
\u5728\u6211\u505a\u8fc7\u7684\u5f88\u591a\u9879\u76ee\u4e2d\uff0cSD \u5361\u548c TF \u5361\u88ab\u7528\u4f5c\u56fa\u4ef6\u5347\u7ea7\u7684\u4ecb\u8d28\u3002<\/p>\n
\u8fd9\u79cd\u65b9\u5f0f\u7279\u522b\u9002\u5408\u90a3\u4e9b\u90e8\u7f72\u5728\u91ce\u5916\u6216\u8005\u96be\u4ee5\u901a\u8fc7\u7f51\u7edc\u5347\u7ea7\u7684\u8bbe\u5907\u3002<\/p>\n
\u7528\u6237\u53ea\u9700\u8981\u5c06\u65b0\u7684\u56fa\u4ef6\u6587\u4ef6\u62f7\u8d1d\u5230\u5b58\u50a8\u5361\u4e2d\uff0c\u63d2\u5165\u8bbe\u5907\uff0c\u8bbe\u5907\u542f\u52a8\u65f6\u4f1a\u81ea\u52a8\u68c0\u6d4b\u5e76\u5b8c\u6210\u5347\u7ea7\u3002<\/p>\n
\u6211\u5728\u4e00\u4e2a\u5de5\u4e1a\u63a7\u5236\u5668\u9879\u76ee\u4e2d\u5b9e\u73b0\u8fc7\u8fd9\u6837\u7684\u529f\u80fd\u3002<\/p>\n
\u8bbe\u5907\u542f\u52a8\u65f6\uff0cBootloader \u4f1a\u68c0\u67e5 SD \u5361\u4e2d\u662f\u5426\u5b58\u5728\u7279\u5b9a\u540d\u79f0\u7684\u56fa\u4ef6\u6587\u4ef6\u3002<\/p>\n
\u5982\u679c\u5b58\u5728\uff0c\u5c31\u4f1a\u8bfb\u53d6\u8fd9\u4e2a\u6587\u4ef6\u5e76\u70e7\u5199\u5230 Flash \u4e2d\uff0c\u7136\u540e\u8df3\u8f6c\u5230\u65b0\u7684\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n
\u8fd9\u4e2a\u8fc7\u7a0b\u7684\u5173\u952e\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
#include "stm32f4xx_hal.h"\n#include "fatfs.h"\n\u200b\n#define FIRMWARE_FILE_NAME "firmware.bin"\n#define APP_START_ADDRESS  0x08010000  \/\/ \u5e94\u7528\u7a0b\u5e8f\u8d77\u59cb\u5730\u5740\n\u200b\n\/\/ \u4eceSD\u5361\u5347\u7ea7\u56fa\u4ef6\nHAL_StatusTypeDef UpdateFirmwareFromSD(void)\n{\n    FIL file;\n    FRESULT fres;\n    UINT bytesRead;\n    uint8_t buffer[1024];\n    uint32_t flashAddress = APP_START_ADDRESS;\n    \n    \/\/ \u6253\u5f00\u56fa\u4ef6\u6587\u4ef6\n    fres = f_open(&file\uff0c FIRMWARE_FILE_NAME\uff0c FA_READ);\n    if (fres != FR_OK)\n    {\n        return HAL_ERROR;  \/\/ \u6587\u4ef6\u4e0d\u5b58\u5728\u6216\u6253\u5f00\u5931\u8d25\n    }\n    \n    \/\/ \u89e3\u9501Flash\n    HAL_FLASH_Unlock();\n    \n    \/\/ \u64e6\u9664\u5e94\u7528\u7a0b\u5e8f\u533a\u57df\n    FLASH_EraseInitTypeDef eraseInit;\n    uint32_t sectorError;\n    eraseInit.TypeErase = FLASH_TYPEERASE_SECTORS;\n    eraseInit.Sector = FLASH_SECTOR_4;  \/\/ \u6839\u636e\u5b9e\u9645\u60c5\u51b5\u8c03\u6574\n    eraseInit.NbSectors = 4;  \/\/ \u64e6\u96644\u4e2a\u6247\u533a\n    eraseInit.VoltageRange = FLASH_VOLTAGE_RANGE_3;\n    \n    if (HAL_FLASHEx_Erase(&eraseInit\uff0c &sectorError) != HAL_OK)\n    {\n        HAL_FLASH_Lock();\n        f_close(&file);\n        return HAL_ERROR;\n    }\n    \n    \/\/ \u8bfb\u53d6\u6587\u4ef6\u5e76\u5199\u5165Flash\n    while (1)\n    {\n        fres = f_read(&file\uff0c buffer\uff0c sizeof(buffer)\uff0c &bytesRead);\n        if (fres != FR_OK || bytesRead == 0)\n        {\n            break;\n        }\n        \n        \/\/ \u5c06\u6570\u636e\u5199\u5165Flash\n        for (uint32_t i = 0; i < bytesRead; i += 4)\n        {\n            uint32_t data = *(uint32_t *)(buffer + i);\n            if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD\uff0c flashAddress\uff0c data) != HAL_OK)\n            {\n                HAL_FLASH_Lock();\n                f_close(&file);\n                return HAL_ERROR;\n            }\n            flashAddress += 4;\n        }\n    }\n    \n    \/\/ \u9501\u5b9aFlash\n    HAL_FLASH_Lock();\n    f_close(&file);\n    \n    \/\/ \u5220\u9664\u56fa\u4ef6\u6587\u4ef6\uff0c\u907f\u514d\u91cd\u590d\u5347\u7ea7\n    f_unlink(FIRMWARE_FILE_NAME);\n    \n    return HAL_OK;\n}<\/code><\/pre>\n
\u8fd9\u4e2a\u56fa\u4ef6\u5347\u7ea7\u65b9\u6848\u5728\u6211\u4eec\u7684\u4ea7\u54c1\u4e2d\u8fd0\u884c\u5f97\u975e\u5e38\u7a33\u5b9a\u3002<\/p>\n
\u5ba2\u6237\u53cd\u9988\u8bf4\u8fd9\u79cd\u5347\u7ea7\u65b9\u5f0f\u6bd4\u901a\u8fc7\u4e32\u53e3\u6216\u8005\u7f51\u7edc\u5347\u7ea7\u8981\u53ef\u9760\u5f97\u591a\uff0c\u7279\u522b\u662f\u5728\u7f51\u7edc\u73af\u5883\u4e0d\u597d\u7684\u5de5\u4e1a\u73b0\u573a\u3002<\/p>\n
2.3 \u591a\u5a92\u4f53\u5e94\u7528<\/h3>\n
\u5728\u97f3\u89c6\u9891\u76f8\u5173\u7684\u5d4c\u5165\u5f0f\u9879\u76ee\u4e2d\uff0cSD \u5361\u548c TF \u5361\u7684\u5e94\u7528\u66f4\u662f\u4e0d\u53ef\u6216\u7f3a\u3002<\/p>\n
\u6211\u53c2\u4e0e\u8fc7\u4e00\u4e2a\u884c\u8f66\u8bb0\u5f55\u4eea\u9879\u76ee\uff0c\u4f7f\u7528 TF \u5361\u6765\u5b58\u50a8\u5f55\u5236\u7684\u89c6\u9891\u3002<\/p>\n
\u8fd9\u7c7b\u5e94\u7528\u5bf9\u5b58\u50a8\u5361\u7684\u5199\u5165\u901f\u5ea6\u8981\u6c42\u5f88\u9ad8\uff0c\u56e0\u4e3a\u89c6\u9891\u6570\u636e\u662f\u8fde\u7eed\u4ea7\u751f\u7684\uff0c\u5982\u679c\u5199\u5165\u901f\u5ea6\u8ddf\u4e0d\u4e0a\uff0c\u5c31\u4f1a\u5bfc\u81f4\u4e22\u5e27\u3002<\/p>\n
\u5728\u9009\u62e9\u5b58\u50a8\u5361\u65f6\uff0c\u6211\u4eec\u9700\u8981\u7279\u522b\u6ce8\u610f\u5361\u7684\u901f\u5ea6\u7b49\u7ea7\u3002<\/p>\n
SD \u534f\u4f1a\u5b9a\u4e49\u4e86\u591a\u79cd\u901f\u5ea6\u7b49\u7ea7\u6807\u51c6\uff0c\u5305\u62ec Class 2\/4\/6\/10\uff0cUHS-I\/II\/III \u7b49\u3002<\/p>\n
\u5bf9\u4e8e 1080P \u89c6\u9891\u5f55\u5236\uff0c\u81f3\u5c11\u9700\u8981 Class 10 \u6216\u8005 UHS-I U1 \u7b49\u7ea7\u7684\u5361\u3002<\/p>\n
\u5728\u6211\u4eec\u7684\u9879\u76ee\u4e2d\uff0c\u4e3a\u4e86\u4fdd\u8bc1 4K \u89c6\u9891\u7684\u6d41\u7545\u5f55\u5236\uff0c\u6211\u4eec\u8981\u6c42\u5ba2\u6237\u4f7f\u7528 UHS-I U3 \u6216\u66f4\u9ad8\u7b49\u7ea7\u7684 TF \u5361\u3002<\/p>\n
\u5728\u4ee3\u7801\u5b9e\u73b0\u4e0a\uff0c\u6211\u4eec\u4f7f\u7528\u4e86 DMA \u6765\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\uff1a<\/p>\n
\/\/ \u4f7f\u7528DMA\u5199\u5165\u89c6\u9891\u6570\u636e\nHAL_StatusTypeDef SD_WriteDMA(uint32_t blockAddr\uff0c uint8_t *pData\uff0c uint32_t numBlocks)\n{\n    HAL_StatusTypeDef status;\n    \n    \/\/ \u542f\u52a8DMA\u4f20\u8f93\n    status = HAL_SD_WriteBlocks_DMA(&hsd\uff0c pData\uff0c blockAddr\uff0c numBlocks);\n    \n    return status;\n}\n\u200b\n\/\/ DMA\u4f20\u8f93\u5b8c\u6210\u56de\u8c03\u51fd\u6570\nvoid HAL_SD_TxCpltCallback(SD_HandleTypeDef *hsd)\n{\n    \/\/ \u8bbe\u7f6e\u6807\u5fd7\u4f4d\uff0c\u901a\u77e5\u5e94\u7528\u5c42\u5199\u5165\u5b8c\u6210\n    sdWriteComplete = 1;\n}\n\u200b\n\/\/ \u5728\u4e3b\u5faa\u73af\u4e2d\u5904\u7406\u89c6\u9891\u6570\u636e\nvoid ProcessVideoData(void)\n{\n    static uint8_t videoBuffer[VIDEO_BUFFER_SIZE];\n    static uint32_t currentBlock = 0;\n    \n    \/\/ \u4ece\u6444\u50cf\u5934\u83b7\u53d6\u89c6\u9891\u6570\u636e\n    if (GetVideoFrame(videoBuffer\uff0c VIDEO_BUFFER_SIZE) == HAL_OK)\n    {\n        \/\/ \u7b49\u5f85\u4e0a\u4e00\u6b21\u5199\u5165\u5b8c\u6210\n        while (sdWriteComplete == 0)\n        {\n            \/\/ \u53ef\u4ee5\u5728\u8fd9\u91cc\u5904\u7406\u5176\u4ed6\u4efb\u52a1\n        }\n        \n        sdWriteComplete = 0;\n        \n        \/\/ \u542f\u52a8DMA\u5199\u5165\n        SD_WriteDMA(currentBlock\uff0c videoBuffer\uff0c VIDEO_BUFFER_SIZE \/ 512);\n        \n        currentBlock += VIDEO_BUFFER_SIZE \/ 512;\n    }\n}<\/code><\/pre>\n
\u4f7f\u7528 DMA \u53ef\u4ee5\u5927\u5927\u51cf\u8f7b CPU \u7684\u8d1f\u62c5\uff0c\u8ba9 CPU \u6709\u66f4\u591a\u65f6\u95f4\u5904\u7406\u89c6\u9891\u7f16\u7801\u7b49\u8ba1\u7b97\u5bc6\u96c6\u578b\u4efb\u52a1\u3002<\/p>\n
\u5728\u6211\u4eec\u7684\u884c\u8f66\u8bb0\u5f55\u4eea\u9879\u76ee\u4e2d\uff0c\u4f7f\u7528 DMA \u540e CPU \u5360\u7528\u7387\u4ece 85% \u964d\u4f4e\u5230\u4e86 60% \u5de6\u53f3\u3002<\/p>\n
2.4 \u6570\u636e\u91c7\u96c6\u5e94\u7528<\/h3>\n
\u5728\u5de5\u4e1a\u6570\u636e\u91c7\u96c6\u7cfb\u7edf\u4e2d\uff0cSD \u5361\u548c TF \u5361\u4e5f\u626e\u6f14\u7740\u91cd\u8981\u89d2\u8272\u3002<\/p>\n
\u6211\u66fe\u7ecf\u4e3a\u4e00\u5bb6\u5236\u9020\u4f01\u4e1a\u5f00\u53d1\u8fc7\u4e00\u5957\u751f\u4ea7\u7ebf\u76d1\u63a7\u7cfb\u7edf\uff0c\u9700\u8981\u5b9e\u65f6\u91c7\u96c6\u591a\u4e2a\u4f20\u611f\u5668\u7684\u6570\u636e\u5e76\u5b58\u50a8\u5230 TF \u5361\u4e2d\u3002<\/p>\n
\u8fd9\u4e2a\u9879\u76ee\u7684\u6311\u6218\u5728\u4e8e\u6570\u636e\u91cf\u5927\u3001\u91c7\u6837\u9891\u7387\u9ad8\uff0c\u800c\u4e14\u9700\u8981\u4fdd\u8bc1\u6570\u636e\u4e0d\u4e22\u5931\u3002<\/p>\n
\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u91c7\u7528\u4e86\u53cc\u7f13\u51b2\u673a\u5236\u3002<\/p>\n
\u7cfb\u7edf\u4f7f\u7528\u4e24\u5757\u5185\u5b58\u7f13\u51b2\u533a\uff0c\u4e00\u5757\u7528\u4e8e\u63a5\u6536\u4f20\u611f\u5668\u6570\u636e\uff0c\u53e6\u4e00\u5757\u7528\u4e8e\u5199\u5165 TF \u5361\u3002<\/p>\n
\u5f53\u4e00\u5757\u7f13\u51b2\u533a\u5199\u6ee1\u540e\uff0c\u7acb\u5373\u5207\u6362\u5230\u53e6\u4e00\u5757\uff0c\u540c\u65f6\u5c06\u5199\u6ee1\u7684\u7f13\u51b2\u533a\u6570\u636e\u5199\u5165 TF \u5361\u3002<\/p>\n
\u8fd9\u6837\u53ef\u4ee5\u4fdd\u8bc1\u6570\u636e\u91c7\u96c6\u7684\u8fde\u7eed\u6027\u3002<\/p>\n
#define BUFFER_SIZE 4096\n\u200b\n\/\/ \u53cc\u7f13\u51b2\u533a\nuint8_t dataBuffer1[BUFFER_SIZE];\nuint8_t dataBuffer2[BUFFER_SIZE];\nuint8_t *currentBuffer;\nuint8_t *writeBuffer;\nuint32_t bufferIndex = 0;\n\u200b\n\/\/ \u521d\u59cb\u5316\u53cc\u7f13\u51b2\nvoid InitDoubleBuffer(void)\n{\n    currentBuffer = dataBuffer1;\n    writeBuffer = dataBuffer2;\n    bufferIndex = 0;\n}\n\u200b\n\/\/ \u6570\u636e\u91c7\u96c6\u56de\u8c03\u51fd\u6570\uff08\u5728\u5b9a\u65f6\u5668\u4e2d\u65ad\u4e2d\u8c03\u7528\uff09\nvoid DataAcquisitionCallback(void)\n{\n    uint16_t sensorData;\n    \n    \/\/ \u8bfb\u53d6\u4f20\u611f\u5668\u6570\u636e\n    sensorData = ReadSensorData();\n    \n    \/\/ \u5c06\u6570\u636e\u5b58\u5165\u5f53\u524d\u7f13\u51b2\u533a\n    currentBuffer[bufferIndex++] = (sensorData >> 8) & 0xFF;\n    currentBuffer[bufferIndex++] = sensorData & 0xFF;\n    \n    \/\/ \u5982\u679c\u7f13\u51b2\u533a\u6ee1\u4e86\uff0c\u5207\u6362\u7f13\u51b2\u533a\n    if (bufferIndex >= BUFFER_SIZE)\n    {\n        \/\/ \u4ea4\u6362\u7f13\u51b2\u533a\u6307\u9488\n        uint8_t *temp = currentBuffer;\n        currentBuffer = writeBuffer;\n        writeBuffer = temp;\n        \n        bufferIndex = 0;\n        \n        \/\/ \u8bbe\u7f6e\u6807\u5fd7\uff0c\u901a\u77e5\u4e3b\u5faa\u73af\u5199\u5165SD\u5361\n        bufferReadyFlag = 1;\n    }\n}\n\u200b\n\/\/ \u5728\u4e3b\u5faa\u73af\u4e2d\u5199\u5165SD\u5361\nvoid MainLoop(void)\n{\n    static uint32_t fileBlock = 0;\n    \n    while (1)\n    {\n        if (bufferReadyFlag)\n        {\n            bufferReadyFlag = 0;\n            \n            \/\/ \u5c06\u6570\u636e\u5199\u5165SD\u5361\n            SD_WriteData(fileBlock\uff0c writeBuffer\uff0c BUFFER_SIZE \/ 512);\n            \n            fileBlock += BUFFER_SIZE \/ 512;\n        }\n        \n        \/\/ \u5904\u7406\u5176\u4ed6\u4efb\u52a1\n    }\n}<\/code><\/pre>\n
\u8fd9\u4e2a\u53cc\u7f13\u51b2\u65b9\u6848\u5728\u6211\u4eec\u7684\u9879\u76ee\u4e2d\u8868\u73b0\u5f88\u597d\uff0c\u5373\u4f7f\u5728\u91c7\u6837\u9891\u7387\u8fbe\u5230 10kHz \u7684\u60c5\u51b5\u4e0b\uff0c\u4e5f\u80fd\u4fdd\u8bc1\u6570\u636e\u4e0d\u4e22\u5931\u3002<\/p>\n
\u5ba2\u6237\u5bf9\u8fd9\u4e2a\u65b9\u6848\u975e\u5e38\u6ee1\u610f\uff0c\u540e\u6765\u53c8\u8ffd\u52a0\u4e86\u51e0\u5957\u540c\u6837\u7684\u7cfb\u7edf\u3002<\/p>\n
3. SD \u5361\u548c TF \u5361\u7684\u9009\u578b\u5efa\u8bae<\/h2>\n
3.1 \u5bb9\u91cf\u9009\u62e9<\/h3>\n
\u5728\u9009\u62e9\u5b58\u50a8\u5361\u5bb9\u91cf\u65f6\uff0c\u6211\u901a\u5e38\u4f1a\u6839\u636e\u5e94\u7528\u7684\u5177\u4f53\u9700\u6c42\u6765\u51b3\u5b9a\u3002<\/p>\n
\u5bf9\u4e8e\u65e5\u5fd7\u8bb0\u5f55\u7c7b\u5e94\u7528\uff0c\u4e00\u822c 4GB \u5230 16GB \u5c31\u8db3\u591f\u4e86\u3002<\/p>\n
\u4f46\u5bf9\u4e8e\u89c6\u9891\u5f55\u5236\u6216\u8005\u5927\u91cf\u56fe\u50cf\u5b58\u50a8\u7684\u5e94\u7528\uff0c\u53ef\u80fd\u9700\u8981 32GB \u751a\u81f3\u66f4\u5927\u7684\u5bb9\u91cf\u3002<\/p>\n
\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5e76\u4e0d\u662f\u5bb9\u91cf\u8d8a\u5927\u8d8a\u597d\u3002<\/p>\n
\u5728\u6211\u7684\u7ecf\u9a8c\u4e2d\uff0c\u5bb9\u91cf\u8fc7\u5927\u7684\u5b58\u50a8\u5361\u5728\u683c\u5f0f\u5316\u548c\u6587\u4ef6\u7cfb\u7edf\u7ef4\u62a4\u65f6\u4f1a\u82b1\u8d39\u66f4\u591a\u65f6\u95f4\u3002<\/p>\n
\u800c\u4e14\uff0c\u5982\u679c\u4f7f\u7528 FAT32 \u6587\u4ef6\u7cfb\u7edf\uff0c\u5355\u4e2a\u6587\u4ef6\u7684\u5927\u5c0f\u9650\u5236\u662f 4GB\uff0c\u8fd9\u5728\u957f\u65f6\u95f4\u89c6\u9891\u5f55\u5236\u65f6\u9700\u8981\u7279\u522b\u6ce8\u610f\u3002<\/p>\n
\u5bf9\u4e8e\u9700\u8981\u5b58\u50a8\u8d85\u8fc7 4GB \u5355\u4e2a\u6587\u4ef6\u7684\u5e94\u7528\uff0c\u5efa\u8bae\u4f7f\u7528 exFAT \u6587\u4ef6\u7cfb\u7edf\u3002<\/p>\n
3.2 \u901f\u5ea6\u7b49\u7ea7\u9009\u62e9<\/h3>\n
\u901f\u5ea6\u7b49\u7ea7\u7684\u9009\u62e9\u76f4\u63a5\u5f71\u54cd\u7cfb\u7edf\u7684\u6027\u80fd\u3002<\/p>\n
\u5728\u6211\u505a\u8fc7\u7684\u9879\u76ee\u4e2d\uff0c\u5982\u679c\u53ea\u662f\u5b58\u50a8\u65e5\u5fd7\u6216\u8005\u914d\u7f6e\u6587\u4ef6\uff0cClass 4 \u7684\u5361\u5c31\u591f\u7528\u4e86\u3002<\/p>\n
\u4f46\u5982\u679c\u662f\u89c6\u9891\u5f55\u5236\u6216\u8005\u9ad8\u901f\u6570\u636e\u91c7\u96c6\uff0c\u5c31\u5fc5\u987b\u9009\u62e9 Class 10 \u6216\u8005 UHS \u7b49\u7ea7\u7684\u5361\u3002<\/p>\n
\u8fd9\u91cc\u6709\u4e00\u4e2a\u5b9e\u9645\u7684\u4f8b\u5b50\u3002<\/p>\n
\u6211\u4eec\u5728\u5f00\u53d1\u4e00\u6b3e\u5de5\u4e1a\u76f8\u673a\u65f6\uff0c\u6700\u521d\u4f7f\u7528\u7684\u662f Class 10 \u7684 TF \u5361\u3002<\/p>\n
\u5728\u6d4b\u8bd5\u4e2d\u53d1\u73b0\uff0c\u5f53\u8fde\u7eed\u62cd\u6444\u9ad8\u5206\u8fa8\u7387\u56fe\u7247\u65f6\uff0c\u5076\u5c14\u4f1a\u51fa\u73b0\u4fdd\u5b58\u5931\u8d25\u7684\u60c5\u51b5\u3002<\/p>\n
\u540e\u6765\u66f4\u6362\u4e3a UHS-I U3 \u7b49\u7ea7\u7684\u5361\u540e\uff0c\u95ee\u9898\u5c31\u5b8c\u5168\u89e3\u51b3\u4e86\u3002<\/p>\n
\u6240\u4ee5\u5728\u9009\u578b\u65f6\uff0c\u4e00\u5b9a\u8981\u6839\u636e\u5b9e\u9645\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\u6765\u9009\u62e9\u5408\u9002\u7684\u901f\u5ea6\u7b49\u7ea7\uff0c\u5e76\u4e14\u7559\u6709\u4e00\u5b9a\u7684\u4f59\u91cf\u3002<\/p>\n
3.3 \u54c1\u724c\u548c\u53ef\u9760\u6027<\/h3>\n
\u5728\u5d4c\u5165\u5f0f\u4ea7\u54c1\u4e2d\uff0c\u5b58\u50a8\u5361\u7684\u53ef\u9760\u6027\u81f3\u5173\u91cd\u8981\u3002<\/p>\n
\u6211\u5728\u9879\u76ee\u4e2d\u4e00\u822c\u4f1a\u9009\u62e9 SanDisk\u3001Samsung\u3001Kingston \u7b49\u77e5\u540d\u54c1\u724c\u7684\u4ea7\u54c1\u3002<\/p>\n
\u867d\u7136\u4ef7\u683c\u53ef\u80fd\u8d35\u4e00\u4e9b\uff0c\u4f46\u8d28\u91cf\u548c\u552e\u540e\u670d\u52a1\u6709\u4fdd\u969c\u3002<\/p>\n
\u6211\u66fe\u7ecf\u9047\u5230\u8fc7\u4e00\u4e2a\u6559\u8bad\u3002<\/p>\n
\u5728\u4e00\u4e2a\u9879\u76ee\u4e2d\uff0c\u4e3a\u4e86\u964d\u4f4e\u6210\u672c\uff0c\u5ba2\u6237\u575a\u6301\u4f7f\u7528\u67d0\u4e2a\u4e0d\u77e5\u540d\u54c1\u724c\u7684 TF \u5361\u3002<\/p>\n
\u7ed3\u679c\u4ea7\u54c1\u4e0a\u5e02\u540e\uff0c\u9646\u7eed\u6536\u5230\u7528\u6237\u53cd\u9988\u8bf4\u6570\u636e\u4e22\u5931\u3002<\/p>\n
\u540e\u6765\u6392\u67e5\u53d1\u73b0\uff0c\u662f TF \u5361\u7684\u8d28\u91cf\u95ee\u9898\u5bfc\u81f4\u7684\u3002<\/p>\n
\u6700\u7ec8\u4e0d\u5f97\u4e0d\u53ec\u56de\u4ea7\u54c1\u66f4\u6362\u5b58\u50a8\u5361\uff0c\u635f\u5931\u8fdc\u8fdc\u8d85\u8fc7\u4e86\u5f53\u521d\u8282\u7701\u7684\u6210\u672c\u3002<\/p>\n
\u6240\u4ee5\u6211\u73b0\u5728\u5728\u7ed9\u5ba2\u6237\u505a\u65b9\u6848\u65f6\uff0c\u90fd\u4f1a\u5f3a\u8c03\u5b58\u50a8\u5361\u8d28\u91cf\u7684\u91cd\u8981\u6027\u3002<\/p>\n
3.4 \u5de5\u4e1a\u7ea7 vs \u6d88\u8d39\u7ea7<\/h3>\n
\u5bf9\u4e8e\u5de5\u4e1a\u5e94\u7528\uff0c\u6211\u5f3a\u70c8\u5efa\u8bae\u4f7f\u7528\u5de5\u4e1a\u7ea7\u7684\u5b58\u50a8\u5361\u3002<\/p>\n
\u5de5\u4e1a\u7ea7\u5b58\u50a8\u5361\u5728\u6e29\u5ea6\u8303\u56f4\u3001\u6297\u9707\u6027\u3001\u4f7f\u7528\u5bff\u547d\u7b49\u65b9\u9762\u90fd\u6bd4\u6d88\u8d39\u7ea7\u4ea7\u54c1\u8981\u597d\u5f97\u591a\u3002<\/p>\n
\u867d\u7136\u4ef7\u683c\u53ef\u80fd\u662f\u6d88\u8d39\u7ea7\u4ea7\u54c1\u7684 2 \u5230 3 \u500d\uff0c\u4f46\u5728\u6076\u52a3\u73af\u5883\u4e0b\u7684\u53ef\u9760\u6027\u662f\u503c\u5f97\u7684\u3002<\/p>\n
\u5728\u6211\u53c2\u4e0e\u7684\u4e00\u4e2a\u6237\u5916\u76d1\u63a7\u9879\u76ee\u4e2d\uff0c\u8bbe\u5907\u9700\u8981\u5728-40\u00b0C \u5230 85\u00b0C \u7684\u6e29\u5ea6\u8303\u56f4\u5185\u5de5\u4f5c\u3002<\/p>\n
\u6211\u4eec\u4f7f\u7528\u7684\u662f SanDisk \u7684\u5de5\u4e1a\u7ea7 TF \u5361\uff0c\u7ecf\u8fc7\u4e24\u5e74\u7684\u5b9e\u9645\u8fd0\u884c\uff0c\u6545\u969c\u7387\u51e0\u4e4e\u4e3a\u96f6\u3002<\/p>\n
\u800c\u540c\u671f\u4f7f\u7528\u6d88\u8d39\u7ea7 TF \u5361\u7684\u7ade\u54c1\uff0c\u5728\u6781\u7aef\u6e29\u5ea6\u4e0b\u9891\u7e41\u51fa\u73b0\u95ee\u9898\u3002<\/p>\n
4. \u4f7f\u7528\u4e2d\u7684\u6ce8\u610f\u4e8b\u9879<\/h2>\n
4.1 \u6587\u4ef6\u7cfb\u7edf\u7684\u9009\u62e9<\/h3>\n
\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u4f7f\u7528 SD \u5361\u6216 TF \u5361\uff0c\u901a\u5e38\u9700\u8981\u914d\u5408\u6587\u4ef6\u7cfb\u7edf\u4f7f\u7528\u3002<\/p>\n
\u6700\u5e38\u7528\u7684\u662f FAT32 \u548c exFAT\u3002<\/p>\n
FAT32 \u517c\u5bb9\u6027\u597d\uff0c\u51e0\u4e4e\u6240\u6709\u8bbe\u5907\u90fd\u652f\u6301\uff0c\u4f46\u6709\u5355\u4e2a\u6587\u4ef6 4GB \u7684\u9650\u5236\u3002<\/p>\n
exFAT \u6ca1\u6709\u8fd9\u4e2a\u9650\u5236\uff0c\u4f46\u4e0d\u662f\u6240\u6709\u8bbe\u5907\u90fd\u652f\u6301\u3002<\/p>\n
\u5728\u6211\u7684\u9879\u76ee\u4e2d\uff0c\u5982\u679c\u4e0d\u9700\u8981\u5b58\u50a8\u8d85\u8fc7 4GB \u7684\u5355\u4e2a\u6587\u4ef6\uff0c\u6211\u90fd\u4f1a\u9009\u62e9 FAT32\u3002<\/p>\n
\u56e0\u4e3a FAT32 \u7684\u5b9e\u73b0\u66f4\u7b80\u5355\uff0c\u5360\u7528\u7684\u8d44\u6e90\u66f4\u5c11\u3002<\/p>\n
\u5728 STM32 \u8fd9\u6837\u7684 MCU \u4e0a\uff0c\u4f7f\u7528 FatFS \u5e93\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u5b9e\u73b0 FAT32 \u6587\u4ef6\u7cfb\u7edf\uff1a<\/p>\n
#include "ff.h"\n\u200b\nFATFS fs;           \/\/ \u6587\u4ef6\u7cfb\u7edf\u5bf9\u8c61\nFIL file;           \/\/ \u6587\u4ef6\u5bf9\u8c61\nFRESULT fres;       \/\/ \u64cd\u4f5c\u7ed3\u679c\n\u200b\n\/\/ \u6302\u8f7d\u6587\u4ef6\u7cfb\u7edf\nvoid MountFileSystem(void)\n{\n    fres = f_mount(&fs\uff0c "0:"\uff0c 1);\n    if (fres != FR_OK)\n    {\n        \/\/ \u6302\u8f7d\u5931\u8d25\uff0c\u53ef\u80fd\u9700\u8981\u683c\u5f0f\u5316\n        printf("Mount failed\uff0c error code: %d\/n"\uff0c fres);\n    }\n}\n\u200b\n\/\/ \u5199\u5165\u65e5\u5fd7\u6587\u4ef6\nvoid WriteLog(const char *logMessage)\n{\n    UINT bytesWritten;\n    \n    \/\/ \u6253\u5f00\u6587\u4ef6\uff0c\u5982\u679c\u4e0d\u5b58\u5728\u5219\u521b\u5efa\n    fres = f_open(&file\uff0c "log.txt"\uff0c FA_OPEN_APPEND | FA_WRITE);\n    if (fres == FR_OK)\n    {\n        \/\/ \u5199\u5165\u65f6\u95f4\u6233\n        char timestamp[32];\n        sprintf(timestamp\uff0c "[%lu] "\uff0c HAL_GetTick());\n        f_write(&file\uff0c timestamp\uff0c strlen(timestamp)\uff0c &bytesWritten);\n        \n        \/\/ \u5199\u5165\u65e5\u5fd7\u5185\u5bb9\n        f_write(&file\uff0c logMessage\uff0c strlen(logMessage)\uff0c &bytesWritten);\n        f_write(&file\uff0c "\/n"\uff0c 1\uff0c &bytesWritten);\n        \n        \/\/ \u5173\u95ed\u6587\u4ef6\n        f_close(&file);\n    }\n}<\/code><\/pre>\n
4.2 \u6570\u636e\u5b8c\u6574\u6027\u4fdd\u62a4<\/h3>\n
\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u7a81\u7136\u65ad\u7535\u662f\u5e38\u89c1\u7684\u60c5\u51b5\u3002<\/p>\n
\u5982\u679c\u5728\u5199\u5165 SD \u5361\u65f6\u7a81\u7136\u65ad\u7535\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6570\u636e\u635f\u574f\u751a\u81f3\u6574\u4e2a\u6587\u4ef6\u7cfb\u7edf\u635f\u574f\u3002<\/p>\n
\u4e3a\u4e86\u907f\u514d\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u5728\u9879\u76ee\u4e2d\u901a\u5e38\u4f1a\u91c7\u53d6\u4ee5\u4e0b\u63aa\u65bd\uff1a<\/p>\n
\u9996\u5148\uff0c\u5c3d\u91cf\u51cf\u5c11\u6587\u4ef6\u7684\u6253\u5f00\u5173\u95ed\u6b21\u6570\u3002<\/p>\n
\u9891\u7e41\u6253\u5f00\u5173\u95ed\u6587\u4ef6\u4f1a\u589e\u52a0\u6587\u4ef6\u7cfb\u7edf\u635f\u574f\u7684\u98ce\u9669\u3002<\/p>\n
\u5176\u6b21\uff0c\u5728\u5173\u952e\u6570\u636e\u5199\u5165\u540e\uff0c\u8c03\u7528 f\/_sync()\u51fd\u6570\u5f3a\u5236\u5c06\u7f13\u51b2\u533a\u6570\u636e\u5199\u5165\u5b58\u50a8\u5361\u3002<\/p>\n
\u6700\u540e\uff0c\u53ef\u4ee5\u8003\u8651\u5b9e\u73b0\u4e00\u4e2a\u7b80\u5355\u7684\u65e5\u5fd7\u7cfb\u7edf\uff0c\u8bb0\u5f55\u6bcf\u6b21\u5199\u5165\u64cd\u4f5c\uff0c\u8fd9\u6837\u5373\u4f7f\u53d1\u751f\u6570\u636e\u635f\u574f\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u65e5\u5fd7\u6062\u590d\u3002<\/p>\n
\/\/ \u5b89\u5168\u5199\u5165\u6570\u636e\nHAL_StatusTypeDef SafeWriteData(const char *filename\uff0c uint8_t *data\uff0c uint32_t size)\n{\n    FIL file;\n    FRESULT fres;\n    UINT bytesWritten;\n    \n    \/\/ \u6253\u5f00\u6587\u4ef6\n    fres = f_open(&file\uff0c filename\uff0c FA_CREATE_ALWAYS | FA_WRITE);\n    if (fres != FR_OK)\n    {\n        return HAL_ERROR;\n    }\n    \n    \/\/ \u5199\u5165\u6570\u636e\n    fres = f_write(&file\uff0c data\uff0c size\uff0c &bytesWritten);\n    if (fres != FR_OK || bytesWritten != size)\n    {\n        f_close(&file);\n        return HAL_ERROR;\n    }\n    \n    \/\/ \u5f3a\u5236\u540c\u6b65\uff0c\u786e\u4fdd\u6570\u636e\u5199\u5165\u5b58\u50a8\u5361\n    fres = f_sync(&file);\n    if (fres != FR_OK)\n    {\n        f_close(&file);\n        return HAL_ERROR;\n    }\n    \n    \/\/ \u5173\u95ed\u6587\u4ef6\n    f_close(&file);\n    \n    return HAL_OK;\n}<\/code><\/pre>\n
4.3 \u70ed\u63d2\u62d4\u5904\u7406<\/h3>\n
\u5728\u67d0\u4e9b\u5e94\u7528\u4e2d\uff0c\u7528\u6237\u53ef\u80fd\u9700\u8981\u5728\u8bbe\u5907\u8fd0\u884c\u65f6\u63d2\u62d4\u5b58\u50a8\u5361\u3002<\/p>\n
\u8fd9\u5c31\u9700\u8981\u6211\u4eec\u7684\u7a0b\u5e8f\u80fd\u591f\u68c0\u6d4b\u5b58\u50a8\u5361\u7684\u63d2\u5165\u548c\u79fb\u9664\uff0c\u5e76\u505a\u51fa\u76f8\u5e94\u7684\u5904\u7406\u3002<\/p>\n
\u5927\u591a\u6570 SD \u5361\u5ea7\u90fd\u6709\u4e00\u4e2a\u68c0\u6d4b\u5f15\u811a\uff0c\u53ef\u4ee5\u7528\u6765\u68c0\u6d4b\u5361\u7684\u63d2\u5165\u72b6\u6001\u3002<\/p>\n
\u5728\u6211\u7684\u9879\u76ee\u4e2d\uff0c\u6211\u901a\u5e38\u4f1a\u4f7f\u7528 GPIO \u4e2d\u65ad\u6765\u68c0\u6d4b\u5b58\u50a8\u5361\u7684\u63d2\u62d4\uff1a<\/p>\n
\/\/ \u5361\u68c0\u6d4b\u5f15\u811a\u7684GPIO\u4e2d\u65ad\u56de\u8c03\nvoid HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)\n{\n    if (GPIO_Pin == SD_DETECT_PIN)\n    {\n        \/\/ \u5ef6\u65f6\u53bb\u6296\u52a8\n        HAL_Delay(50);\n        \n        if (HAL_GPIO_ReadPin(SD_DETECT_PORT\uff0c SD_DETECT_PIN) == GPIO_PIN_RESET)\n        {\n            \/\/ \u5361\u63d2\u5165\n            cardInserted = 1;\n            \/\/ \u91cd\u65b0\u6302\u8f7d\u6587\u4ef6\u7cfb\u7edf\n            f_mount(&fs\uff0c "0:"\uff0c 1);\n        }\n        else\n        {\n            \/\/ \u5361\u79fb\u9664\n            cardInserted = 0;\n            \/\/ \u5378\u8f7d\u6587\u4ef6\u7cfb\u7edf\n            f_mount(NULL\uff0c "0:"\uff0c 0);\n        }\n    }\n}\n\u200b\n\/\/ \u5728\u5199\u5165\u524d\u68c0\u67e5\u5361\u662f\u5426\u5b58\u5728\nHAL_StatusTypeDef WriteDataToCard(uint8_t *data\uff0c uint32_t size)\n{\n    if (!cardInserted)\n    {\n        return HAL_ERROR;  \/\/ \u5361\u672a\u63d2\u5165\n    }\n    \n    \/\/ \u6267\u884c\u5199\u5165\u64cd\u4f5c\n    return SafeWriteData("data.bin"\uff0c data\uff0c size);\n}<\/code><\/pre>\n
4.4 \u6027\u80fd\u4f18\u5316<\/h3>\n
\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0cSD \u5361\u7684\u8bfb\u5199\u6027\u80fd\u53ef\u80fd\u4f1a\u6210\u4e3a\u7cfb\u7edf\u7684\u74f6\u9888\u3002<\/p>\n
\u6211\u5728\u9879\u76ee\u4e2d\u603b\u7ed3\u4e86\u4e00\u4e9b\u4f18\u5316\u6280\u5de7\uff1a<\/p>\n
\u7b2c\u4e00\uff0c\u4f7f\u7528\u5757\u8bfb\u5199\u800c\u4e0d\u662f\u5b57\u8282\u8bfb\u5199\u3002<\/p>\n
SD \u5361\u7684\u6700\u5c0f\u8bfb\u5199\u5355\u4f4d\u662f 512 \u5b57\u8282\u7684\u5757\uff0c\u4f7f\u7528\u5757\u8bfb\u5199\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u6548\u7387\u3002<\/p>\n
\u7b2c\u4e8c\uff0c\u5c3d\u91cf\u4f7f\u7528\u8fde\u7eed\u7684\u5b58\u50a8\u7a7a\u95f4\u3002<\/p>\n
\u788e\u7247\u5316\u7684\u6587\u4ef6\u4f1a\u964d\u4f4e\u8bfb\u5199\u901f\u5ea6\u3002<\/p>\n
\u5728\u6211\u7684\u4e00\u4e2a\u9879\u76ee\u4e2d\uff0c\u5b9a\u671f\u6574\u7406\u5b58\u50a8\u5361\u53ef\u4ee5\u5c06\u5199\u5165\u901f\u5ea6\u63d0\u5347 30% \u5de6\u53f3\u3002<\/p>\n
\u7b2c\u4e09\uff0c\u5408\u7406\u8bbe\u7f6e FatFS \u7684\u6247\u533a\u5927\u5c0f\u548c\u7f13\u51b2\u533a\u5927\u5c0f\u3002<\/p>\n
\u5728 ffconf.h \u914d\u7f6e\u6587\u4ef6\u4e2d\uff0c\u53ef\u4ee5\u8c03\u6574\u8fd9\u4e9b\u53c2\u6570\u6765\u4f18\u5316\u6027\u80fd\uff1a<\/p>\n
\/\/ ffconf.h \u4e2d\u7684\u5173\u952e\u914d\u7f6e\n#define FF_MAX_SS    4096    \/\/ \u6700\u5927\u6247\u533a\u5927\u5c0f\uff0c\u589e\u5927\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\n#define FF_MIN_SS    512     \/\/ \u6700\u5c0f\u6247\u533a\u5927\u5c0f\n#define FF_USE_LFN   2       \/\/ \u957f\u6587\u4ef6\u540d\u652f\u6301\n#define FF_FS_LOCK   4       \/\/ \u6587\u4ef6\u9501\u5b9a\u529f\u80fd<\/code><\/pre>\n
\u7b2c\u56db\uff0c\u5bf9\u4e8e\u5927\u6587\u4ef6\u7684\u5199\u5165\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528 f\/_expand()\u51fd\u6570\u9884\u5206\u914d\u7a7a\u95f4\uff0c\u8fd9\u6837\u53ef\u4ee5\u51cf\u5c11\u6587\u4ef6\u7cfb\u7edf\u7684\u5f00\u9500\uff1a<\/p>\n
\/\/ \u9884\u5206\u914d\u6587\u4ef6\u7a7a\u95f4\nFRESULT PreAllocateFile(const char *filename\uff0c FSIZE_t size)\n{\n    FIL file;\n    FRESULT fres;\n\n    \/\/ \u521b\u5efa\u6587\u4ef6\n    fres = f_open(&file\uff0c filename\uff0c FA_CREATE_ALWAYS | FA_WRITE);\n    if (fres != FR_OK)\n    {\n        return fres;\n    }\n\n    \/\/ \u9884\u5206\u914d\u7a7a\u95f4\n    fres = f_expand(&file\uff0c size\uff0c 1);\n    if (fres != FR_OK)\n    {\n        f_close(&file);\n        return fres;\n    }\n\n    f_close(&file);\n    return FR_OK;\n}<\/code><\/pre>\n
5. \u603b\u7ed3<\/h2>\n
SD \u5361\u548c TF \u5361\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u7684\u5e94\u7528\u975e\u5e38\u5e7f\u6cdb\uff0c\u4ece\u7b80\u5355\u7684\u6570\u636e\u5b58\u50a8\u5230\u590d\u6742\u7684\u591a\u5a92\u4f53\u5e94\u7528\uff0c\u5b83\u4eec\u90fd\u80fd\u80dc\u4efb\u3002<\/p>\n
\u5728\u6211\u591a\u5e74\u7684\u5d4c\u5165\u5f0f\u5f00\u53d1\u7ecf\u9a8c\u4e2d\uff0c\u9009\u62e9\u5408\u9002\u7684\u5b58\u50a8\u65b9\u6848\u3001\u6b63\u786e\u5730\u4f7f\u7528\u5b58\u50a8\u5361\u3001\u505a\u597d\u6570\u636e\u4fdd\u62a4\u548c\u6027\u80fd\u4f18\u5316\uff0c\u662f\u4fdd\u8bc1\u4ea7\u54c1\u7a33\u5b9a\u8fd0\u884c\u7684\u5173\u952e\u3002<\/p>\n
\u5bf9\u4e8e\u521d\u5b66\u8005\u6765\u8bf4\uff0c\u5efa\u8bae\u5148\u4ece\u7b80\u5355\u7684\u6587\u4ef6\u8bfb\u5199\u5f00\u59cb\uff0c\u9010\u6b65\u638c\u63e1\u6587\u4ef6\u7cfb\u7edf\u7684\u4f7f\u7528\u3002<\/p>\n
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\u53ea\u6709\u5145\u5206\u7406\u89e3\u548c\u638c\u63e1\u8fd9\u4e9b\u7ec6\u8282\uff0c\u624d\u80fd\u5f00\u53d1\u51fa\u7a33\u5b9a\u53ef\u9760\u7684\u4ea7\u54c1\u3002<\/p>\n
\u5e0c\u671b\u8fd9\u7bc7\u6587\u7ae0\u80fd\u591f\u5e2e\u52a9\u5927\u5bb6\u66f4\u597d\u5730\u7406\u89e3\u548c\u5e94\u7528 SD \u5361\u548c TF \u5361\u3002<\/p>\n
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\u66f4\u591a\u7f16\u7a0b\u5b66\u4e60\u8d44\u6e90<\/strong><\/p>\n