wbq_88 发表于 2016-8-17 09:27
兄弟  spiffs在文件追加数据内容 怎么实现的  我试了就是不行

JJKwong 发表于 2015-10-15 13:57
LZ怎么样在文件内容后面追加数据内容的啊，怎么我这样总是不行的呢

解决了，还是sizeof与printf的问题，改为strlen ok ，还是基础不够扎实

看我上面的例子，我之前是因为sizeof 与 strlen的问题

JJKwong 发表于 2016-8-17 11:00
JJKwong 发表于 2015-10-15 13:57
LZ怎么样在文件内容后面追加数据内容的啊，怎么我这样总是不行的呢

//打开文件，如果文件不存在，自动创建
    fd = SPIFFS_open(&SPIFlashFS, "my_file", SPIFFS_CREAT | SPIFFS_TRUNC | SPIFFS_RDWR, 0);
    SPIFFS_close(&SPIFlashFS, fd);
    //写文件
    res = SPIFFS_stat(&SPIFlashFS, "my_file", &s);
    DBGOUT("s.size = %d ",s.size);
    fd = SPIFFS_open(&SPIFlashFS, "my_file",  SPIFFS_RDWR, 0);
    SPIFFS_lseek(&SPIFlashFS, fd,s.size,SPIFFS_SEEK_CUR);
    if (SPIFFS_write(&SPIFlashFS, fd, WriteBuf, sizeof(WriteBuf)) < 0)
    DBGOUT("errno %i ", SPIFFS_errno(&SPIFlashFS));
    SPIFFS_close(&SPIFlashFS, fd);

    //读文件
    fd = SPIFFS_open(&SPIFlashFS, "my_file", SPIFFS_RDWR, 0);
    if (SPIFFS_read(&SPIFlashFS, fd, ReadBuf, sizeof(ReadBuf)) < 0)
    DBGOUT("errno %i ", SPIFFS_errno(&SPIFlashFS));
    SPIFFS_close(&SPIFlashFS, fd);
    //打印输出文件内容
    DBGOUT("%s ", ReadBuf);


这是我写的，可追加就是不行

JJKwong 发表于 2016-8-17 11:00
JJKwong 发表于 2015-10-15 13:57
LZ怎么样在文件内容后面追加数据内容的啊，怎么我这样总是不行的呢

//打开文件，如果文件不存在，自动创建
    fd = SPIFFS_open(&SPIFlashFS, "my_file", SPIFFS_CREAT | SPIFFS_TRUNC | SPIFFS_RDWR, 0);
    SPIFFS_close(&SPIFlashFS, fd);
    //写文件
    res = SPIFFS_stat(&SPIFlashFS, "my_file", &s);
    DBGOUT("s.size = %d ",s.size);
    fd = SPIFFS_open(&SPIFlashFS, "my_file",  SPIFFS_RDWR, 0);
    SPIFFS_lseek(&SPIFlashFS, fd,s.size,SPIFFS_SEEK_CUR);
    if (SPIFFS_write(&SPIFlashFS, fd, WriteBuf, sizeof(WriteBuf)) < 0)
    DBGOUT("errno %i ", SPIFFS_errno(&SPIFlashFS));
    SPIFFS_close(&SPIFlashFS, fd);

    //读文件
    fd = SPIFFS_open(&SPIFlashFS, "my_file", SPIFFS_RDWR, 0);
    if (SPIFFS_read(&SPIFlashFS, fd, ReadBuf, sizeof(ReadBuf)) < 0)
    DBGOUT("errno %i ", SPIFFS_errno(&SPIFlashFS));
    SPIFFS_close(&SPIFlashFS, fd);
    //打印输出文件内容
    DBGOUT("%s ", ReadBuf);


这是我写的，可追加就是不行

mark, 正需要

wbq_88 发表于 2016-8-17 21:58
你是把所有的sizof的地方都改为strlen？

1. //????,???????,????
   
2.         spiffs_file fd = SPIFFS_open(&SPIFlashFS, "my_file", SPIFFS_CREAT | SPIFFS_TRUNC | SPIFFS_RDWR, 0);
   
3.         printf("%d,%d  ",sizeof(WriteBuf),strlen(WriteBuf));
   
4.           //???
   
5.     if (SPIFFS_write(&SPIFlashFS, fd, WriteBuf, strlen(WriteBuf)) < 0)
   
6.                 printf("errno %i ", SPIFFS_errno(&SPIFlashFS));
   
7.         if (SPIFFS_write(&SPIFlashFS, fd, WriteBuf1, strlen(WriteBuf1)) < 0)
   
8.                 printf("errno %i ", SPIFFS_errno(&SPIFlashFS));
   
9.     SPIFFS_close(&SPIFlashFS, fd);
   
10.   
    
11.                 //???
    
12.     fd = SPIFFS_open(&SPIFlashFS, "my_file", SPIFFS_RDONLY, 0);
    
13.     if (SPIFFS_read(&SPIFlashFS, fd, ReadBuf, sizeof(ReadBuf)) < 0)
    
14.                 printf("errno %i ", SPIFFS_errno(&SPIFlashFS));
    
15.         //SPIFFS_fstat查询文件大小要在open情况下
    
16.         res = SPIFFS_fstat(&SPIFlashFS, fd, &s);
    
17.         printf("%d ",s.size);
    
18.     SPIFFS_close(&SPIFlashFS, fd);
    
19.   
    
20.                 //????????
    
21.     printf("%s ", ReadBuf);
    
22. 
    
23.         /////////////////////////////////////
    
24.         res = SPIFFS_stat(&SPIFlashFS, "my_file", &s);
    
25.         printf("%d ",s.size);
    
26.         ////////////////////////////////////////////////////////////
    
27. 
    
28.         fd = SPIFFS_open(&SPIFlashFS, "my_file", SPIFFS_RDWR, 0);
    
29.         SPIFFS_lseek(&SPIFlashFS, fd, s.size, SPIFFS_SEEK_CUR);
    
30.         if (SPIFFS_write(&SPIFlashFS, fd, WriteBuf2, strlen(WriteBuf2)) < 0)
    
31.                 printf("errno %i ", SPIFFS_errno(&SPIFlashFS));
    
32.     SPIFFS_close(&SPIFlashFS, fd);
    
33.        
    
34.         fd = SPIFFS_open(&SPIFlashFS, "my_file", SPIFFS_RDONLY, 0);
    
35.     if (SPIFFS_read(&SPIFlashFS, fd, ReadBuf, sizeof(ReadBuf)) < 0)
    
36.                 printf("errno %i ", SPIFFS_errno(&SPIFlashFS));
    
37.     SPIFFS_close(&SPIFlashFS, fd);
    
38. 
    
39.          printf("%s ", ReadBuf);

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