将FATFS移植STM32RBT6遇到的挂载不成功和返回值问题

写0res= f_mount(&fs,(TCHAR*)0,1); /* Mount a logical drive */;的时候老返回FR_INVALID_DRIVE,/* (11) The logical drive number is invalid */挂载失败。如果你也遇到这个问题建议改成res= f_mount(&fs,(TCHAR*)1,1);这种形式就行了，但是打开文件和读文件内容时还要这么写

res=exf_getfree("0:",&nCapacity,&free);//得到SD卡的总容量和剩余容量
res=f_open(&file, "0:/test.txt", FA_OPEN_EXISTING|FA_READ);
res=f_read (
&file, /* Pointer to the file object */
buffer,/* Pointer to data buffer */
512,/* Number of bytes to read */
&br/* Pointer to number of bytes read */
) ;

好了，废话不多说，把main函数应用层代码粘贴出来FATFS fs;
FIL file; //文件1
FIL ftemp; //文件2.
UINT br,bw;//读写变量
FILINFO fileinfo;//文件信息
DIR dir;
FILINFO fileInfo;
UINT br,bw;

FRESULT res;
u32 nCapacity;
char buffer[512];
int main(void)
{
u32 total,free;
BspInit();
res= SD_Init();

if(res==0)
{

DebugOut(0, "sd卡初始化成功!");
}

res= f_mount(&fs,(TCHAR*)1,1); /* Mount a logical drive */;
//f_mkfs(0,1,4096);
res=exf_getfree("0:",&nCapacity,&free);//得到SD卡的总容量和剩余容量
DebugOut(0,"总容量：%dKB,剩余容量：%dKB",nCapacity,free);
res=f_open(&file, "0:/test.txt", FA_OPEN_EXISTING|FA_READ);
res=f_read (
&file, /* Pointer to the file object */
buffer,/* Pointer to data buffer */
512,/* Number of bytes to read */
&br/* Pointer to number of bytes read */
) ;
DebugOut(0,"buffer:%s",buffer);
res= f_mount(NULL,(TCHAR*)1,1);
while(1);

}