本帖最后由 xiaoqi976633690 于 2023-9-28 09:56 编辑
1、开发环境
开发板：CH32X035C-R0-1V2
IDE：MounRiver Studio
仿真器：WCHLINKE
flash ：W25Q16fatfs：FatFs R0.15
http://elm-chan.org/fsw/ff/doc/mkfs.html
2、硬件配置
/*
*SPI interface operation flash peripheral routine:
*Master:SPI1_SCK(PA5)、SPI1_MISO(PA6)、SPI1_MOSI(PA7).
*This example demonstrates SPI operation Winbond W25Qxx SPIFLASH.
*
*pins:
* CS -- PA2
* DO -- PA6(SPI1_MISO)
* WP -- 3.3V
* DI -- PA7(SPI1_MOSI)
* CLK -- PA5(SPI1_SCK)
* HOLD -- 3.3V
*
*/
3、代码实现
SPI底层 flash驱动官方已经写好了只要调用就好了。
a.fatfs移植
integer.h：文件中包含了一些数值类型定义。
diskio.c：包含底层存储介质的操作函数，这些函数需要用户自己实现，主要添加底层驱动函数。
ff.c：FatFs核心文件，文件管理的实现方法。该文件独立于底层介质操作文件的函数，利用这些函数实现文件的读写。（相当于C语言中的stdio.h）
cc936.c：本文在option目录下，是简体中文支持所需要添加的文件，包含了简体志文的GBK和Unicode相互转换功能函数。
ffconf.h：这个头文件包含了对FatFs功能配置的宏定义，通过修改这些宏定义就可以裁剪FatFs的功能。如需要支持简体中文，需要把ffconf.h中的_CODE_PAGE的宏改成936并把上面的cc936.c文件加入到工程之中。
diskio.c需要用户自己实现
user_diskio.c文件里主要是disk_initialize、disk_status、disk_read、disk_write 4个函数，后面两个函数容易出错，我是参考了正点原子的。
DSTATUS disk_status(
BYTE pdrv /* Physical drive nmuber to identify the drive */
)
{
if(pdrv==SPI_FLASH)
{
return RES_OK; //直接返回OK即可
}
else
{
printf("!!!disk_status ERR\r\n");
return RES_PARERR;
}
}
DSTATUS disk_initialize(
BYTE pdrv /* Physical drive nmuber to identify the drive */
)
{
if(pdrv == SPI_FLASH)
{
SPI_Flash_Init();//初始化 spi flash
// printf("!!!SPI_Flash_Init OK\r\n");
return RES_OK;
}
else
{
printf("!!!disk_initialize ERR\r\n");
return RES_PARERR;
}
}
DRESULT disk_read(
BYTE pdrv, /* Physical drive nmuber to identify the drive */
BYTE *buff, /* Data buffer to store read data */
LBA_t sector, /* Start sector in LBA */
UINT count /* Number of sectors to read */
)
{
DRESULT res;
//uart_printf("disk_read---sector:%d,count:%d\r\n",sector,count);
if(pdrv == SPI_FLASH)
{
for(;count>0;count--)
{
SPI_Flash_Read(buff,sector*FLASH_SECTOR_SIZE,FLASH_SECTOR_SIZE);
sector++;
buff+=FLASH_SECTOR_SIZE;
}
// SPI_Flash_Read(buff,sector,count);//spi flash的读接口，注意函数参数类型一致性
res = 0;
return res;
}
else
{
printf("!!!disk_read ERR\r\n");
return RES_PARERR;
}
}
DRESULT disk_write(
BYTE pdrv, /* Physical drive nmuber to identify the drive */
const BYTE *buff, /* Data to be written */
LBA_t sector, /* Start sector in LBA */
UINT count /* Number of sectors to write */
)
{
DRESULT res;
if(pdrv == SPI_FLASH)
{
for(;count>0;count--)
{
SPI_Flash_Write((u8*)buff,sector*FLASH_SECTOR_SIZE,FLASH_SECTOR_SIZE);
sector++;
buff+=FLASH_SECTOR_SIZE;
}
res=0;
return res;
}
else
{
printf("!!!disk_write ERR\r\n");
return RES_PARERR;
}
}
DRESULT disk_ioctl(
BYTE pdrv, /* Physical drive nmuber (0..) */
BYTE cmd, /* Control code */
void *buff /* Buffer to send/receive control data */
)
{
if (pdrv == SPI_FLASH)
{
switch (cmd)
{
case CTRL_SYNC:
return RES_OK;
/* 扇区数量 1024*1024*1024 =4 (MB) */
case GET_SECTOR_COUNT:
*(DWORD * )buff = 512;//W25Q32 有1024个大小为4k bytes 的扇区
return RES_OK;
/* 扇区大小 */
case GET_SECTOR_SIZE :
*(WORD * )buff = 2048;//spi flash的扇区大小是 4K Bytes
return RES_OK;
/*块大小 */
case GET_BLOCK_SIZE :
*(DWORD * )buff = 1;
return RES_OK;
default:
return RES_PARERR;
}
}
else
{
printf("!!!disk_ioctl ERR\r\n");
return RES_PARERR;
}
}
DWORD get_fattime (void)
{
return 0;
}
void fs_test(void)
{
/* Filesystem object */
FIL fil; /* File object */
FRESULT res; /* API result code */
UINT bw; /* Bytes written */
BYTE work[FF_MAX_SS]; /* Work area (larger is better for processing time) */
BYTE mm[50];//读缓存
UINT i;
printf("file system start:\r\n");
fs = malloc(sizeof (FATFS));
res = f_mount(fs, "0:",1);
printf("res=%d\n\r",res);
/* 格式化文件系统 */
if(res!=0)
{
res = f_mkfs("0:",0,work,sizeof work );
/* 卸载文件系统 */
f_mount(NULL,"0:",1);
/* 挂载文件系统 */
res = f_mount(fs, "0:",1);
}
if(res==0) printf("mkfs is success!%d\n\r",res);
else printf("mkfs is fail!%d\n\r",res);
if(res==0) printf("f_mount is success!%d\n\r",res);
else printf("f_mount is fail!%d\n\r",res);
/* Create a file as new */
res = f_open(&fil, "0:/1.txt", FA_CREATE_NEW | FA_WRITE | FA_READ);
if (res)
{
printf("open file fail.id=%d\r\n",res);
}
else
{
printf("open file success.\r\n");
}
/* Write a message */
res = f_write(&fil, "Hello,World!", 12, &bw);
//printf("res write:%d\r\n",res);
if (bw == 12)
{
printf("writing ok!\r\n");
}
else
{
printf("writing fail!\r\n");
}
res = f_size(&fil);
printf("file size:%d Bytes.\r\n",res);
memset(mm,0x0,50);
f_lseek(&fil,0);
res = f_read(&fil,mm,12,&i);
if (res == FR_OK)
{
printf("read file ok!\r\n");
printf("read file lengh:%d Bytes.\r\n",i);
}
else
{
printf("read fail\r\n");
}
printf("read file:\r\n");
printf("%s\n\r",mm);
/* Close the file */
f_close(&fil);
/*卸载文件系统*/
f_mount(0, "0:", 0);
free(fs);
printf("file system down.\r\n");
}
int main(void)
{
u8 datap[SIZE];
u16 Flash_Model;
FRESULT res;
FATFS * fs;
SystemCoreClockUpdate();
Delay_Init();
USART_Printf_Init(115200);
printf("SystemClk:%d\r\n", SystemCoreClock);
printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );
// SPI_Flash_Init();
disk_initialize(0);
Flash_Model = SPI_Flash_ReadID();
switch(Flash_Model)
{
case W25Q80:
printf("W25Q80 OK!\r\n");
break;
case W25Q16:
printf("W25Q16 OK!\r\n");
break;
case W25Q32:
printf("W25Q32 OK!\r\n");
break;
case W25Q64:
printf("W25Q64 OK!\r\n");
break;
case W25Q128:
printf("W25Q128 OK!\r\n");
break;
default:
printf("Fail!\r\n");
break;
}
↑↑↑↑↑↑↑main函数老是复制不上来↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑
↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓接上面↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓
Delay_Ms(1000);
fs_test();
while(1)
{
Delay_Ms(1000);
fs = malloc(sizeof (FATFS));
res = f_mount(fs, "0:",1);
printf("mount=%d\n\r",res);
get_fatfs_free();
Delay_Ms(500);
res=f_mount(0, "0:", 0);
free(fs);
printf("un mount=%d\n\r",res);
// printf("Start Read W25Qxx....\r\n");
// SPI_Flash_Read(datap, 0x0, SIZE);
// printf("%s\r\n", datap);
}
}
4、实验效果
每次上电都要格式化 ，百度必应了半天也没有解决。
后来发现是例程的扇区擦除函数没有删掉。
排查了老半天！！！！
//printf("Start Erase W25Qxx....\r\n");
//SPI_Flash_Erase_Sector(0);
// printf("W25Qxx Erase Finished!\r\n");
附件：
SPI_FLASH.zip
(3.27 MB)
https://bbs.21ic.com/forum.php?mod=attachment&aid=MjE2NjMyNHwyNmRiZDhmOTQxNWMwMmZlYWM0ODM1NzliYWUwYWI1Y3wxNzMyMzgyNzg5&request=yes&_f=.zip
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