1、简介

和前面文章原理其实一样的。
1.29 Cubemx_STM32F429\H743 nandflash、spifalsh纳入文件管理系统
现在一并将SD卡、NandFlash、SPIFlash一并作为文件管理。
下面直接介绍SDcard,其他参考前面文章。

2、CubeMX配置

在这里插入图片描述

3 、bsp

#include <stdio.h>
#include <string.h>
#include "ff.h"
#include "fatfs.h"
#include "bsp_led.h"

#define FILE_NAME_SD   "0:sudaroot.txt"

extern  uint8_t mk_buffer[4096]; /* a work buffer for the f_mkfs() */
extern  unsigned int count;
extern  unsigned char work[4096];
extern  unsigned char read_buf[50] ;
extern  unsigned char write_buf[50];

void test_mkfs_sdcard(void)
{
	FRESULT retSD;
	retSD = f_mount(&SDFatFS, SDPath, 1);
	retSD = f_mkfs((TCHAR const*)SDPath, FM_FAT32, 0, mk_buffer, sizeof(mk_buffer));

	// retSD = f_mount(&SDFatFS, “0:”, 1);
	// retSD = f_mkfs(“0:”, FM_FAT32, 0, mk_buffer, sizeof(mk_buffer));
	__NOP();
}


void test_SD_FATFS(void)
{
	    FRESULT retSD;
     printf("\r\n ****** FatFs Example ******\r\n\r\n");
    /*##-1- Register the file system object to the FatFs module ##############*/
	//	f_mount(&spi_fs,"0:/",1);
    retSD = f_mount(&SDFatFS, SDPath, 1);
    if(retSD != FR_OK)
    {
        if(retSD == FR_NO_FILESYSTEM)
        {
            printf("f_mount 没有文件系统,开始格式化spi-flash\r\n");
            retSD = f_mkfs((TCHAR const*)SDPath, FM_FAT32, 0, mk_buffer, sizeof(mk_buffer));
            if(retSD != FR_OK)
            {
                printf("f_mkfs 格式化失败，err = %d\r\n", retSD);
                while(1);
            }
            else
            {
                printf("格式化成功，开始重新挂载spi-flash\r\n");
                retSD = f_mount(&SDFatFS,SDPath, 1);
                if(retSD != FR_OK)
                {
                    printf("f_mount 发生错误，err = %d\r\n", retSD);
                }
                else printf("spi-flash文件系统挂载成功\r\n");
            }
        }
        else
        {
            printf("f_mount 发生其他错误，err = %d\r\n", retSD);
            while(1);
        }
    }
    else printf("sd_card文件系统挂载成功\r\n");
    /*----------------------- 文件系统测试：写测试 -----------------------------*/
    printf("\r\n****** 即将进行文件写入测试... ******\r\n");
    retSD = f_open(&SDFile,FILE_NAME_SD, FA_OPEN_ALWAYS | FA_WRITE);
    if(retSD == FR_OK)
    {
        printf("打开/创建sudaroot.txt文件成功，向文件写入数据。\r\n");
        retSD = f_write(&SDFile, write_buf, strlen((const char *)write_buf), &count);
        if(retSD != FR_OK)
        {
            printf("f_write 发生错误，err = %d\r\n", retSD);
            printf("关闭打开的sudaroot.txt文件\r\n");
            count = 0;
            f_close(&SDFile);
        }
        else
        {
            printf("文件写入成功，写入字节数据：%d\n", count);
            printf("向文件写入的数据为：\r\n%s\r\n", write_buf);
            printf("关闭打开的sudaroot.txt文件\r\n");
            count = 0;
            f_close(&SDFile);
        }
    }
    else printf("打开/创建sudaroot.txt文件失败，err = %d\r\n", retSD);
    /*------------------- 文件系统测试：读测试 ------------------------------------*/
    printf("****** 即将进行文件读取测试... ******\r\n");
    retSD = f_open(&SDFile, FILE_NAME_SD, FA_OPEN_EXISTING | FA_READ);
    if(retSD == FR_OK)
    {
        printf("打开sudaroot.txt文件成功\r\n");
        retSD = f_read(&SDFile, read_buf, sizeof(read_buf), &count);
        if(retSD != FR_OK)
        {
            printf("f_read 发生错误，err = %d\r\n", retSD);
            printf("关闭打开的sudaroot.txt文件\r\n");
            f_close(&SDFile);
        }
        else
        {
            printf("文件读取成功，读取字节数据：%d\n", count);
            printf("向文件读取的数据为：\r\n%s\r\n", read_buf);
            printf("关闭打开的sudaroot.txt文件\r\n");
            f_close(&SDFile);
        }
    }
    else printf("打开sudaroot.txt文件失败，err = %d\r\n", retSD);
//			/* 不再使用文件系统，取消挂载文件系统 */
//	f_mount(NULL,"0:",1);
}