请教为啥图片只能保存一次，文字可以多次，但是保存一次图片后，文字也不能保存了

qizhixu1971 · 发表于 2015-12-8 20:21:19

请教为啥图片只能保存一次，文字可以多次，但是保存一次图片后，文字也不能保存了！
下面是程序，请大侠指点。

void savewave(void)
{
   FRESULT res,res1,res2;
   UINT WRBytes;
   FIL fileW;
   DIR picdir;          //目录

   u32 Date,Time;
   static char string10[25]; //根目录={"0:/"}
   static char string11[15];     //日期目录={" "}
   static char string12[3];   //={"/"}
   static char string13[15]; //时间={" "}
   static char string14[5]; //={".bmp"}
   static char dir_path1[25]; //={" "}
   static char file_path1[25]; //={" "}

   memset(string10,0,25);
   memset(string11,0,15);
    memset(string12,0,3);
   memset(string13,0,15);
   memset(string14,0,5);
   memset(dir_path1,0,25);
   memset(file_path1,0,25);

   strcpy(string10, "0:/");
   strcpy(string11, " ");
   strcpy(string12, "/");
   strcpy(string13, " ");
   strcpy(string14, ".txt");
   strcpy(dir_path1, " ");
   strcpy(file_path1," ");

Date=calendar.w_year*10000+calendar.w_month*100+calendar.w_date; //获取日期
convert(string11,Date);          //日期转换为字符串
Time=calendar.hour*10000+calendar.min*100+calendar.sec;       //获取时间
convert(string13,Time);          //时间转换为字符串

strcat(string10,string11);         //合成文件夹路径
strcpy(dir_path1,string10);

strcat(string10,string12);                //合成文件路径
strcat(string13,string14);
strcat(string10,string13);
strcpy(file_path1,string10);

res=f_mount(fs[0],"0:",1);    //挂载SD卡
   if(res)
       {
          Show_Str(0,450,192,24,"SD mount failed!",24,0);
          delay_ms(1000);
           LCD_Fill(0,450,192,474,BLACK);
      }

res1 = f_opendir(&picdir,(TCHAR *)dir_path1);//打开目录
if(res1!=FR_OK)
{
res2 = f_mkdir((TCHAR *)dir_path1);           //创建目录
}

if((res2==FR_EXIST)||(res1==FR_OK))
    {                  //如果目录存在,根据时间创建文件
res = f_open(&fileW,(TCHAR *)file_path1, FA_CREATE_ALWAYS|FA_WRITE); //文件不存在则创建新文件   //f_open (FIL* fp, const TCHAR* path, BYTE mode);
Show_Str(40,450,192,24,"saving......",24,0);
   f_write (&fileW, "test", 4, &WRBytes); //f_write (FIL* fp, const void* buff, UINT btw ,//写入数量字节, UINT* bw//);
f_close (&fileW);               //关闭文件

Show_Str(40,450,192,24,"Save .txt finished!",24,0);
   delay_ms(2000);
   LCD_Fill(0,450,192,474,BLACK);
}

qizhixu1971 · 发表于 2015-12-8 20:22:12

void savepicture(void)
{
FRESULT res,res1,res2;
UINT WRBytes;
FIL fileW;
DIR picdir; //目录
u16 i,j;
u16 Line_buf[600];
static char char_i[1];

u32 Date,Time;
   static char string20[25]; //根目录={"0:/"}
   static char string21[15];     //日期目录={" "}
   static char string22[3];   //={"/"}
   static char string23[15]; //时间={" "}
   static char string24[5];  //={".bmp"}
static char dir_path2[25];  //={" "}
   static char file_path2[25];  //={" "}

memset(string20,0,25);
memset(string21,0,15);
memset(string22,0,3);
memset(string23,0,15);
memset(string24,0,5);
memset(dir_path2,0,25);
memset(file_path2,0,25);

strcpy(string20, "0:/");
strcpy(string21, " ");
strcpy(string22, "/");
strcpy(string23, " ");
strcpy(string24, ".bmp");
strcpy(dir_path2, " ");
strcpy(file_path2," ");

Date=calendar.w_year*10000+calendar.w_month*100+calendar.w_date;  //获取日期
convert(string21,Date);          //日期转换为字符串
Time=calendar.hour*10000+calendar.min*100+calendar.sec;       //获取时间
convert(string23,Time);          //时间转换为字符串

strcat(string20,string21);         //合成文件夹路径
strcpy(dir_path2,string20);

strcat(string20,string22);                //合成文件路径
strcat(string23,string24);
strcat(string20,string23);
strcpy(file_path2,string20);

res=f_mount(fs[0],"0:",1); //挂载SD卡
if(res)
{
  Show_Str(0,450,192,24,"SD mount failed!",24,0);
  delay_ms(1000);
LCD_Fill(0,450,192,474,BLACK);
  }

res1 = f_opendir(&picdir,(TCHAR *)dir_path2);//打开目录
if(res1!=FR_OK)
{
res2 = f_mkdir((TCHAR *)dir_path2);           //创建目录
}

if((res2==FR_EXIST)||(res1==FR_OK))
{                  //如果目录存在,根据时间创建文件
  res = f_open(&fileW,(TCHAR *)file_path2,  FA_CREATE_ALWAYS|FA_WRITE);  //文件不存在则创建新文件   //f_open (FIL* fp, const TCHAR* path, BYTE mode);
  Show_Str(40,450,192,24,"saving......",24,0);
WriteHeader(&fileW);
WriteBMPInfo(&fileW);
for(i=440;i>40;i--)
{
memset(char_i,0,1);
convert(char_i,i);
Show_Str(140,450,192,24,(u8 *)char_i,24,0);
for(j=40;j<640;j++)
{
Line_buf[j-40]=LCD_ReadPoint(j,i);
}
f_write(&fileW,(u8*)Line_buf,1200,&WRBytes);
}

    f_close (&fileW);               //关闭文件
   Show_Str(40,450,192,24,"Save .bmp finished!",24,0);
  delay_ms(2000);
  LCD_Fill(40,450,192,474,BLACK);
}