stm32103移植fat中遇到问题，新手求大神！！！急急

木頭love@rong

程序能读出扇区（不知道读的对不对），但是移植后就是不行，返回错误res=12.

程序已经上传，请大家帮帮忙看看呀！
*********************main*********************
#include "stm32f10x.h"
#include "MMC_SD.h"
#include "delay.h"
#include <stdio.h>
#include "integer.h"
#include "diskio.h"
#include "ff.h"

USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)

FATFS fs;            // Work area (file system object) for logical drive
FIL fsrc, fdst;         // file objects
BYTE buffer[512];       // file copy buffer
FRESULT res;            // FatFs function common result code
UINT br, bw;            // File R/W count  
uint8_t textFileBuffer[] = "sd card fat...\r\n";

u8 pbuf[512];



void Delay(vu32 nCount)
{
  for(; nCount != 0; nCount--);
}

void STM32_Shenzhou_COMInit(USART_InitTypeDef* USART_InitStruct)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);

  /* Enable UART clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); 

  /* Configure USART Tx as alternate function push-pull */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Configure USART Rx as input floating */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
 
  USART_Init(USART1, USART_InitStruct); /* USART configuration */
  USART_Cmd(USART1, ENABLE);  /* Enable USART */
}

int main(void)
{
   u32 sd_size;
   u8 t=0;
   u8 *buf;
   delay_init(72);
   
  /*LED管脚初始化*/
  
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB, ENABLE); /*使能LED灯使用的GPIO时钟*/

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_3; 
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_Init(GPIOA, &GPIO_InitStructure);  /*LED灯相关的GPIO口初始化*/
  GPIO_Init(GPIOB, &GPIO_InitStructure);
  
  GPIO_SetBits(GPIOA,GPIO_Pin_2|GPIO_Pin_3);   /*关闭所有的LED指示灯*/
  GPIO_SetBits(GPIOB,GPIO_Pin_2);      

  USART_InitStructure.USART_BaudRate = 115200;
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;
  USART_InitStructure.USART_StopBits = USART_StopBits_1;
  USART_InitStructure.USART_Parity = USART_Parity_No;
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

  STM32_Shenzhou_COMInit(&USART_InitStructure);

  printf("\n\r---------------------------------------------\n ");
  printf("\n\rMicro SD卡测试程序\n");
   
   while(SD_Init()!=0)//检测不到SD卡
{
printf("SD Card Failed!");
delay_ms(50);
printf("Please Check!      ");
delay_ms(50);
}

//检测SD卡成功
GPIO_ResetBits(GPIOA,GPIO_Pin_2|GPIO_Pin_3);   /*打开所有的LED指示灯*/
    GPIO_ResetBits(GPIOB,GPIO_Pin_2);
delay_ms(50);
printf("\n\rSD Card Checked OK ");    
sd_size=SD_GetCapacity()/1024;
printf("\n\rSD Card Size: %ld  b\n\r",sd_size);
GPIO_SetBits(GPIOA,GPIO_Pin_2|GPIO_Pin_3);   /*关闭所有的LED指示灯*/
    GPIO_SetBits(GPIOB,GPIO_Pin_2);
    if(disk_initialize(MMC)==0);
printf("\n\r SD init ok \n\r");

while(1)
{
if(SD_ReadSingleBlock(0,buf)==0)//读取MBR扇区
{
printf("USART1 Sending Data...");
delay_ms(50);
printf("SECTOR 0 DATA:\n");
for(sd_size=0;sd_size<512;sd_size++)//打印MBR扇区数据
{
printf("%x ",buf[sd_size]);
}
printf("\n\rUSART1 Send Data Over!\n");
}
GPIO_ResetBits(GPIOA,GPIO_Pin_2|GPIO_Pin_3);   /*打开所有的LED指示灯*/
        GPIO_ResetBits(GPIOB,GPIO_Pin_2); 

delay_ms(50);
GPIO_SetBits(GPIOA,GPIO_Pin_2|GPIO_Pin_3);   /*关闭所有的LED指示灯*/
        GPIO_SetBits(GPIOB,GPIO_Pin_2);


//写文件测试
printf("write file test......\n\r");
res = f_open(&fdst, "0:/test.txt", FA_CREATE_ALWAYS | FA_WRITE);
if(res != FR_OK){
       printf("open file error : %d\n\r",res);
}else{
       res = f_write(&fdst, textFileBuffer, sizeof(textFileBuffer), &bw);               /* Write it to the dst file */
       if(res == FR_OK){
               printf("write data ok! %d\n\r",bw);
       }else{
               printf("write data error : %d\n\r",res);
       }
       /*close file */
       
f_close(&fdst);
f_mount(0, NULL); 
}
}
}

PUTCHAR_PROTOTYPE
{
  /* Place your implementation of fputc here */
  /* e.g. write a character to the USART */
  USART_SendData(USART1, (uint8_t) ch);

  /* Loop until the end of transmission */
  while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)
  {
  }

  return ch;
}

八度空间

读取一个block是有数据的，你这读取的数据不对

木頭love@rong

原子哥v5  移植成功了 困扰多久的问题解决了