求助FATFS往SD卡写文件问题

cjc · 发表于 2014-4-14 13:39:59

f_mount(0,&fs);

res_a = f_open(&file,"tes_super.txt",FA_OPEN_ALWAYS|FA_WRITE | FA_READ);

if (res_a == FR_OK)

{

printf("fsize1:%d\r\n",file.fsize);

f_lseek(&file,file.fsize);

printf("dd:%s \r\n","create file ok!");

do

{

res_a = f_write(&file,buf_super_char, super_char_num_n+1, &bw);

if(res_a)

{

printf("dd:%s \r\n","write error\r\n");

break;

}

printf("dd:%s \r\n","write ok");

}

while(bw<super_char_num_n+1);

}

f_close(&file);
delay_ms(2000);

f_mount(0,&fs); res_a= f_open(&file,"tes_car.txt",FA_OPEN_ALWAYS|FA_WRITE | FA_READ); if (res_a== FR_OK) { printf("fsize:%d\r\n",file.fsize); f_lseek(&file,file.fsize); printf("dd:%s \r\n","create2 file ok!"); do { res_a = f_write(&file,buf_car_move, car_move_num_n+1, &bw); if(res_a) { printf("dd:%s \r\n","write2 error"); break; } printf("dd:%s \r\n","write2 ok\r\n"); } while(bw<car_move_num_n+1); } f_close(&file); delay_ms(2000);

写文件代码如上第一组往sd卡里存超声波测距数据，第二组测编码器脉冲。串口打印显示正常，文件存储成功。但是打开text文件的时候，有时候能打开，有时候会出现乱码，求助，帮忙解答一下原因，先谢过了。