sd fatfs 写文件问题

zeroawp · 发表于 2016-10-27 14:40:50

本帖最后由 zeroawp 于 2016-10-28 16:06 编辑

用MINISTM32的FATFS例程，发现文件无法正常创建。
运行结果如下：
Begin Write file...
Write data len:512
Write Error:9
Write data over.
Write SD OK!

错误9表示The file/directory object is invalid，文件在电脑上打开有文件名，但是无法打开。

代码如下：
[mw_shl_code=c,true]#include <stm32f10x_lib.h>
#include "sys.h"
#include "usart.h"
#include "delay.h"
#include "led.h"
#include "key.h"
#include "exti.h"
#include "wdg.h"
#include "timer.h"
#include "lcd.h"
#include "rtc.h"
#include "wkup.h"
#include "adc.h"
#include "dma.h"
#include "24cxx.h"
#include "flash.h"
#include "touch.h"
#include "24l01.h"
#include "mmc_sd.h"
#include "string.h"
#include "malloc.h"
#include "exfuns.h"
#include "fattester.h"
//Mini STM32¿a·￠°å·¶ày′úÂë20
//SD¿¨ êμÑé
//ÕyμãÔ-×ó@ALIENTEK
//¼¼êõÂÛì3:www.openedv.com
                              u8 Fatfs_Write(u8 *path);
u8 buf[512];//SD¿¨êy¾Y»o′æÇø
FIL *filea;
int main(void)
{
u8 t=0,res;
char data[512];
      u32 sd_size;
      u16 i=0;
u8 getcid,*cid_data;
      //Stm32_Clock_Init(9);//Ïμí3ê±ÖóéèÖÃ
      delay_init(72);             //Ñóê±3õê¼»ˉ
      //uart_init(72,9600); //′®¿ú13õê¼»ˉ
      //LCD_Init();                      //3õê¼»ˉòo¾§
      //LED_Init();       //LED3õê¼»ˉ
      mem_init(SRAMIN);             //3õê¼»ˉÄú2¿Äú′æ3Ø
      exfuns_init();                      //ÎafatfsÏà1Ø±äá¿éêÇëÄú′æ
      f_mount(0,fs[0]);                //1òÔØSD¿¨

      //POINT_COLOR=RED;//éèÖÃ×ÖìåÎaoìé«
//       LCD_ShowString(60,50,"Mini STM32");
//       LCD_ShowString(60,70,"SD Card TEST");
//       LCD_ShowString(60,90,"ATOM@ALIENTEK");
//       LCD_ShowString(60,110,"2011/1/1");
      printf("SD Card TEST\n");
            //printf("temperature1:%6.2f¡æ Humidity1 RH%6.2f%%\n",temperature,Humidity);
      while(SD_Initialize()!=0)//¼ì2a2»μ½SD¿¨
      {
            //LCD_ShowString(60,130,"SD Card Failed!");
            printf("SD Card Failed!\n");
            delay_ms(500);
            //LCD_ShowString(60,130,"Please Check!    ");
            delay_ms(500);
            LED0=!LED0;//DS0éáË¸
      }
      //¼ì2aSD¿¨3é1|
//       LCD_ShowString(60,130,"SD Card Checked OK ");
//       LCD_ShowString(60,150,"SD Card Size: Mb");
      printf("SD Card Checked OK!\n");

      sd_size=SD_GetCapacity();
      //sd_size=SD_GetSectorCount();
      //LCD_ShowNum(164,150,sd_size>>20,4,16);//ÏÔê¾SD¿¨èYá¿
      printf("sd_size:%ld\n",sd_size);

      mf_mount(0); //ÔúFatFsÄ￡¿ééÏ×￠2á/×￠Ïúò»¸ö1¤×÷Çø(ÎÄ¼tÏμí3¶ÔÏó)
                                                //ËμÃ÷￡o1¡￠ò»¶¨òaÏè¶¨òåò»¸ö FATFS
                                                //    2¡￠ÔúòÆÖ2μÄ1y3ìÖDò»ÑùòaóÃF_MOUNToˉêy
                                                //    3¡￠Ôúê1óÃèÎoÎÆäËûÎÄ¼toˉêyÖ®Ç°￡¬±ØDëê1óÃ¸ÃoˉêyÎaÃ¿¸ö¾í×￠2áò»¸ö1¤×÷Çø¡￡
                                                //       òa×￠Ïúò»¸ö1¤×÷Çø￡¬Ö»òaÖ¸¶¨FileSystemObjectÎaNULL¼′¿é￡¬è»oó¸Ã1¤×÷Çø¿éòÔ±»¶aÆú¡￡

      //′ò¿adata.txtÎÄ¼t èç1ûòa′ò¿aμÄÎÄ¼t2»′æÔú￡¬Ôò·μ»Øê§°ü
   //res = f_open(&file,"data.txt",FA_OPEN_EXISTING | FA_READ);          // ¿Õ°×ÎÄ¼t¶ÔÏó½á11Ö¸Õë,ÎÄ¼tÃûÖ¸Õë,Ä￡ê½±êÖ¾       ￡¨′ò¿a¿éòÔ￡©
      //  res = f_open(&file,"mcu.doc",FA_CREATE_ALWAYS  | FA_WRITE);       // ¿Õ°×ÎÄ¼t¶ÔÏó½á11Ö¸Õë,ÎÄ¼tÃûÖ¸Õë,Ä￡ê½±êÖ¾       ￡¨½¨á￠¿éòÔ￡©
      //  res = f_open(&file,"asi",FA_CREATE_NEW  | FA_WRITE);                   //Îaê2Ã′DÂ½¨ò»¸öÎÄ¼t»á3öÏÖÎÄ¼tòÑ¾-′æÔúÄØ￡¿
      mf_mkdir("123");          //½¨á￠μúò»¸öÎÄ¼t¼D123
      printf("Create folder 123 OK!\n");
// mf_mkdir("123/sub2");    //Ôú123ÏÂ½¨á￠ò»¸öÎÄ¼t¼Dsub2
//       printf("Create folder 123/sub2 OK!\n");
// mf_mkdir("123/sub2/sub3");       //Ôú123ÏÂ￡¬sub2àï½¨á￠ò»¸ösub3
//             printf("Create folder 123/sub2/sub3 OK!\n");
//                mf_mkdir("0123");
//mf_open("0:/123/sub2/sub3/read.txt", FA_CREATE_ALWAYS  | FA_WRITE); //Ôú01¤×÷Çø123ÖDμÄsub2àïμÄsub3ÎÄ¼t¼DÖD½¨á￠read.txt
mf_open("0:/123/read.txt", FA_OPEN_ALWAYS  | FA_WRITE); //Ôú01¤×÷Çø123ÖDμÄsub2àïμÄsub3ÎÄ¼t¼DÖD½¨á￠read.txt
  printf("Create read.txt OK!\n");
//mf_open("0:SD1.txt", FA_CREATE_ALWAYS  | FA_WRITE); //Ôú01¤×÷Çø123ÖDμÄsub2àïμÄsub3ÎÄ¼t¼DÖD½¨á￠read.txt
//  printf("Create read.txt OK!\n");
delay_ms(500);
      for(i=0;i<512;i++)
      {
      //       data = i+0x30;
      data='i';
      }
      mf_write((u8*)data,512);
      printf("Write SD OK!\n");
      mf_close(); //1Ø±Õ′ò¿aμÄÎÄ¼t

   mf_mount(0); // ×￠Ïú1¤×÷Çø(Ôú·ÏÆúÇ°)
               printf("Complete!");

      while(1)
      {
            delay_ms(200);
            LED0=!LED0;

      }
}

[/mw_shl_code]