215 lines
6.6 KiB
Markdown
215 lines
6.6 KiB
Markdown
# FATS的移植过程
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1.[参考文档](https://blog.csdn.net/weixin_42042056/article/details/118190017?spm=1001.2101.3001.6661.1&utm_medium=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7ERate-1-118190017-blog-22197877.pc_relevant_3mothn_strategy_recovery&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7ERate-1-118190017-blog-22197877.pc_relevant_3mothn_strategy_recovery&utm_relevant_index=1)
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课程资料EX8
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2.添加FATS的库文件，把.C改成.CPP，移除头文件里面所有的
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```c
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#ifdef __cplusplus
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extern "C" {
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#endif
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```
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3.添加FLASH读写的接口文件
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4.改写diskio.cpp文件的接口函数，参考如下，FATS的版本为:12c
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```c
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/*第一步:添加自己的头文件*/
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#include "../W25QXXArduino/w25qxx.h"
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/*第二步:添加一些宏定义*/
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#define FLASH_SECTOR_SIZE 512
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#define FLASH_SECTOR_COUNT 2048 * 16
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#define FLASH_BLOCK_SIZE 8
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/*第三步:改写如下函数*/
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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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return RES_OK;
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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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DSTATUS stat = RES_OK;
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W25QXX_Init();
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return stat;
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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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DWORD 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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DRESULT res = RES_OK;
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if(!count) return RES_PARERR; //count????0,????????
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for(;count > 0;count--){
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W25QXX_Read(buff,sector * FLASH_SECTOR_SIZE,FLASH_SECTOR_SIZE);
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sector ++;
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buff += FLASH_SECTOR_SIZE;
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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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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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DWORD 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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if(!count) return RES_PARERR; //count????0,????????
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for(;count > 0;count --){
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W25QXX_Write((uint8_t *)buff, sector * FLASH_SECTOR_SIZE, FLASH_SECTOR_SIZE);
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sector ++;
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buff += FLASH_SECTOR_SIZE;
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}
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return res;
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}
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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_OK;
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switch(cmd)
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{
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case CTRL_SYNC: res = RES_OK; break;
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case GET_SECTOR_SIZE: *(WORD*)buff = FLASH_SECTOR_SIZE;
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res = RES_OK; break;
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case GET_BLOCK_SIZE: *(WORD*)buff = FLASH_BLOCK_SIZE;
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res = RES_OK; break;
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case GET_SECTOR_COUNT: *(DWORD*)buff = FLASH_SECTOR_COUNT;
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res = RES_OK; break;
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default: res = RES_PARERR; break;
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}
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return res;
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}
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```
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5.修改**ffconf.h**宏定义:
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```c
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#define _FS_NORTC 1 //修改为1，禁用时间
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#define _MIN_SS 512 //不修改
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#define _MAX_SS 4096 //修改为4096
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#define _USE_MKFS 1 //使能一些函数
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```
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6.写入测试块
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```c
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/***FATS 这几个变量设置为全局变量，不然会栈溢出错误***/
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BYTE work[4096]; //FATFS工作缓冲区
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FATFS fs; //文件系统对象
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FIL fil; //文件对象
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FRESULT res;//操作返回对象
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UINT bw, i; //临时变量
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BYTE mm[500]; //临时数组
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/***FATS***/
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```
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```
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res = f_mount(&fs, "0:",1);
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if(res == 0X0D) //FLASH磁盘，FAT文件系统错误，重新格式化FLASH
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{
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Serial.printf("Flash Disk Formatting...\n"); //格式化FLASH
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res = f_mkfs("0:",FM_ANY,0,work,sizeof(work));
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if(res != FR_OK)
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Serial.printf("mkfs error.\n");
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}
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if(res == FR_OK)
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Serial.printf("FATFS Init ok!\n");
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res = f_open(&fil,"0:/test.txt",FA_CREATE_NEW);
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if(res != FR_OK && res != FR_EXIST)
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Serial.printf("create file error.\n");
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if(res == FR_EXIST)
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res = f_open(&fil,"0:test.txt",FA_WRITE|FA_READ|FA_OPEN_APPEND);
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if(res != FR_OK)
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Serial.printf("open file error.\n");
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else{
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Serial.printf("open file ok.\n");
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f_puts("Hello,World!\n你好世界\n",&fil);
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Serial.printf("file size:%lu Bytes.\n", f_size(&fil));
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memset(mm,0x0,500);
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f_lseek(&fil,0);
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res = f_read(&fil,mm,500,&i);
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if(res == FR_OK) printf("read size:%d Bytes.\n%s",i,mm);
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else Serial.printf("read error!\r\n");
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f_close(&fil);
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/*卸载文件系统*/
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f_mount(0,"0:",0);
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}
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```
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正常结果显示:
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```c
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ets Jun 8 2016 00:22:57
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rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
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configsip: 0, SPIWP:0xee
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clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
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mode:DIO, clock div:1
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load:0x3fff0030,len:1344
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load:0x40078000,len:13864
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load:0x40080400,len:3608
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entry 0x400805f0
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flash is EF17
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FATFS Init ok!
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open file ok.
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file size:104 Bytes.
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read size:104 Bytes.
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Hello,World!
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你好世界
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Hello,World!
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你好世界
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Hello,World!
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你好世界
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Hello,World!
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你好世界
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```
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## 注意点
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1. [Arduino头文件包含的注意](https://blog.csdn.net/weixin_42042056/article/details/118190017?spm=1001.2101.3001.6661.1&utm_medium=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7ERate-1-118190017-blog-22197877.pc_relevant_3mothn_strategy_recovery&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7ERate-1-118190017-blog-22197877.pc_relevant_3mothn_strategy_recovery&utm_relevant_index=1)
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2. C++和C语言冲突的问题解决相关C语言和C++冲突的问题:
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```c
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error: unknown type name 'class'
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error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
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error: unknown type name 'SPIClass'
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```
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解决 ：把所有的.c改成.cpp；删除
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```c
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*代码块*/
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#ifdef __cplusplus
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extern "C" }
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#endif
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3. 栈溢出错误导致无限重启，将FATS测试变量设置为全局的,[参考解释](https://blog.csdn.net/qq_41828707/article/details/108527610)
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