diff --git a/readme.md b/readme.md index d2e9b29..decb9b0 100644 --- a/readme.md +++ b/readme.md @@ -1,8 +1,196 @@ +# FATS的移植过程 + +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) + 课程资料EX8 +2.添加FATS的库文件，把.C改成.CPP，移除头文件里面所有的 + +```c +#ifdef __cplusplus + extern "C" { +#endif +``` + +3.添加FLASH读写的接口文件 + +4.改写diskio.cpp文件的接口函数，参考如下，FATS的版本为:12c + +```c +/*第一步:添加自己的头文件*/ +#include "../W25QXXArduino/w25qxx.h" +/*第二步:添加一些宏定义*/ +#define FLASH_SECTOR_SIZE 512 +#define FLASH_SECTOR_COUNT 2048 * 16 +#define FLASH_BLOCK_SIZE 8 +/*第三步:改写如下函数*/ +DSTATUS disk_status ( + BYTE pdrv /* Physical drive nmuber to identify the drive */ +) +{ +return RES_OK; +} +/*-----------------------------------------------------------------------*/ +/* Inidialize a Drive */ +/*-----------------------------------------------------------------------*/ +DSTATUS disk_initialize ( + BYTE pdrv /* Physical drive nmuber to identify the drive */ +) +{ + DSTATUS stat = RES_OK; + + W25QXX_Init(); + return stat; +} +/*-----------------------------------------------------------------------*/ +/* Read Sector(s) */ +/*-----------------------------------------------------------------------*/ +DRESULT disk_read ( + BYTE pdrv, /* Physical drive nmuber to identify the drive */ + BYTE *buff, /* Data buffer to store read data */ + DWORD sector, /* Start sector in LBA */ + UINT count /* Number of sectors to read */ +) +{ + DRESULT res = RES_OK; + if(!count) return RES_PARERR; //count????0,???????? + for(;count > 0;count--){ + W25QXX_Read(buff,sector * FLASH_SECTOR_SIZE,FLASH_SECTOR_SIZE); + sector ++; + buff += FLASH_SECTOR_SIZE; + } + return res; +} +/*-----------------------------------------------------------------------*/ +/* Write Sector(s) */ +/*-----------------------------------------------------------------------*/ +DRESULT disk_write ( + BYTE pdrv, /* Physical drive nmuber to identify the drive */ + const BYTE *buff, /* Data to be written */ + DWORD sector, /* Start sector in LBA */ + UINT count /* Number of sectors to write */ +) +{ + DRESULT res = RES_OK; + if(!count) return RES_PARERR; //count????0,???????? + for(;count > 0;count --){ + W25QXX_Write((uint8_t *)buff, sector * FLASH_SECTOR_SIZE, FLASH_SECTOR_SIZE); + sector ++; + buff += FLASH_SECTOR_SIZE; + } + return res; +} +/*-----------------------------------------------------------------------*/ +/* Miscellaneous Functions */ +/*-----------------------------------------------------------------------*/ +DRESULT disk_ioctl ( + BYTE pdrv, /* Physical drive nmuber (0..) */ + BYTE cmd, /* Control code */ + void *buff /* Buffer to send/receive control data */ +) +{ + DRESULT res = RES_OK; + switch(cmd) + { + case CTRL_SYNC: res = RES_OK; break; + case GET_SECTOR_SIZE: *(WORD*)buff = FLASH_SECTOR_SIZE; + res = RES_OK; break; + case GET_BLOCK_SIZE: *(WORD*)buff = FLASH_BLOCK_SIZE; + res = RES_OK; break; + case GET_SECTOR_COUNT: *(DWORD*)buff = FLASH_SECTOR_COUNT; + res = RES_OK; break; + default: res = RES_PARERR; break; + } + return res; +} +``` + +5.修改**ffconf.h**宏定义: + +```c +#define _FS_NORTC 1 //修改为1，禁用时间 +#define _MIN_SS 512 //不修改 +#define _MAX_SS 4096 //修改为4096 +#define _USE_MKFS 1 //使能一些函数 +``` + +6.写入测试块 + +```c +/***FATS 这几个变量设置为全局变量，不然会栈溢出错误***/ +BYTE work[4096]; //FATFS工作缓冲区 +FATFS fs; //文件系统对象 +FIL fil; //文件对象 +FRESULT res;//操作返回对象 +UINT bw, i; //临时变量 +BYTE mm[500]; //临时数组 +/***FATS***/ +``` + +``` + res = f_mount(&fs, "0:",1); + if(res == 0X0D) //FLASH磁盘，FAT文件系统错误，重新格式化FLASH + { + Serial.printf("Flash Disk Formatting...\n"); //格式化FLASH + res = f_mkfs("0:",FM_ANY,0,work,sizeof(work)); + if(res != FR_OK) + Serial.printf("mkfs error.\n"); + } + if(res == FR_OK) + Serial.printf("FATFS Init ok!\n"); + res = f_open(&fil,"0:/test.txt",FA_CREATE_NEW); + if(res != FR_OK && res != FR_EXIST) + Serial.printf("create file error.\n"); + if(res == FR_EXIST) + res = f_open(&fil,"0:test.txt",FA_WRITE|FA_READ|FA_OPEN_APPEND); + if(res != FR_OK) + Serial.printf("open file error.\n"); + else{ + Serial.printf("open file ok.\n"); + f_puts("Hello,World!\n你好世界\n",&fil); + Serial.printf("file size:%lu Bytes.\n", f_size(&fil)); + memset(mm,0x0,500); + f_lseek(&fil,0); + res = f_read(&fil,mm,500,&i); + if(res == FR_OK) printf("read size:%d Bytes.\n%s",i,mm); + else Serial.printf("read error!\r\n"); + f_close(&fil); + /*卸载文件系统*/ + f_mount(0,"0:",0); + } +``` + +正常结果显示: + +```c +ets Jun 8 2016 00:22:57 + +rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT) +configsip: 0, SPIWP:0xee +clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 +mode:DIO, clock div:1 +load:0x3fff0030,len:1344 +load:0x40078000,len:13864 +load:0x40080400,len:3608 +entry 0x400805f0 +flash is EF17 +FATFS Init ok! +open file ok. +file size:104 Bytes. +read size:104 Bytes. +Hello,World! +你好世界 +Hello,World! +你好世界 +Hello,World! +你好世界 +Hello,World! +你好世界 +``` + +## 注意点 + 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) -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: +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: ```c error: unknown type name 'class' @@ -10,7 +198,7 @@ error: unknown type name 'SPIClass' ``` - + 解决 ：把所有的.c改成.cpp；删除 ```c @@ -20,8 +208,7 @@ /*代码块*/ #ifdef __cplusplus extern "C" } - #endif - ``` + #endif -3. Arduino添加头文件的方法:后面添加... +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)