6.6 KiB
6.6 KiB
FATS的移植过程
1.参考文档 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
#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
/*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:
#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
/***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:
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
-
C++和C语言冲突的问题解决相关C语言和C++冲突的问题:
error: unknown type name 'class' error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token error: unknown type name 'SPIClass'解决 ：把所有的.c改成.cpp；删除
#ifdef __cplusplus extern "C" { #endif /*代码块*/ #ifdef __cplusplus extern "C" } #endif -
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