FTAFS移植f_mount 挂载成功f_open失败问题（1）

最近在调试fatfs文件系统，源代码是0.10a代码顺带参考原子0.09的程序，我的代码中没有使用中文也就是_USE_LFN  设置为零，其次没有使用内存分配，sd_mmc.c是从fat32文件爱系统移植过来，可以正常播放MP3，我的主控是STM32F103RB芯片，移植完后，

在main里边如下

FATFS *fatfs;

FIL *file；

u32 *total;

u32 *free;

int main（）

｛

 RESULT  res;

bsp_init()；//初始化程序都在里边完成

res=sd_inti();

if(res)

{

printf("init falier");

}

else{//}

res=f_mount(fs,"0:",1);

res=exfuns_getfree("0",total,free);

while(1);

｝

在调试中发现sd卡初始化成功，也就是返回值为零，

挂载也返回零，然后读取sd卡大小时

res返回12；

对应的值得意思是工作区没有。后来改成f_open（file,"0:123.txt",FA_CREATE_ALWAYS|FA_CREATE_NEW）结果返回9，又说路径无效。

今晚回去好好看硬件spi有没有接反。

typedef enum {

 FR_OK = 0,    / (0) Succeeded /

 FR_DISK_ERR,   / (1) A hard error occurred in the low level disk I/O layer /

 FR_INT_ERR,    / (2) Assertion failed /

 FR_NOT_READY,   / (3) The physical drive cannot work /

 FR_NO_FILE,    / (4) Could not find the file /

 FR_NO_PATH,    / (5) Could not find the path /

 FR_INVALID_NAME,  / (6) The path name format is invalid /

 FR_DENIED,    / (7) Access denied due to prohibited access or directory full /

 FR_EXIST,    / (8) Access denied due to prohibited access /

 FR_INVALID_OBJECT,  / (9) The file/directory object is invalid /

 FR_WRITE_PROTECTED,  / (10) The physical drive is write protected /

 FR_INVALID_DRIVE,  / (11) The logical drive number is invalid /

 FR_NOT_ENABLED,   / (12) The volume has no work area /

 FR_NO_FILESYSTEM,  / (13) There is no valid FAT volume /

 FR_MKFS_ABORTED,  / (14) The f_mkfs() aborted due to any parameter error /

 FR_TIMEOUT,    / (15) Could not get a grant to access the volume within defined period /

 FR_LOCKED,    / (16) The operation is rejected according to the file sharing policy /

 FR_NOT_ENOUGH_CORE,  / (17) LFN working buffer could not be allocated /

 FR_TOO_MANY_OPEN_FILES, / (18) Number of open files > _FS_SHARE /

 FR_INVALID_PARAMETER / (19) Given parameter is invalid /

} FRESULT;

 再次查看过硬件线没有接反！