rt-thread DSF中怎么往文件里追加内容
\ | /- RT - Thread Operating System
/ | \ 1.0.0 build Mar1 2012
2006 - 2011 Copyright by rt-thread team
found part, begin: 66048, size: 1.885GB
File System initialized!
finsh>>cat("/ARMFLY.TXT")
123456Write Demo
www.armfly.com lindabell 0, 0x00000000
finsh>>
finsh>>append("/ARMFLY.TXT","ABCDE",5)
write data len:226 0, 0x00000000
finsh>>
finsh>>cat("/ARMFLY.TXT")
123456Write Demo
www.armfly.com lindabell 0, 0x00000000
finsh>>
finsh>>
---------------------------------------------------------
void append(const char * filename,const char * buf,const char Size)
{
struct dfs_fd fd;
rt_uint8_t len;
if(dfs_file_open(&fd,filename,DFS_O_APPEND)<0)
{
rt_kprintf("open %s failed\n",filename);
}
len=dfs_file_write(&fd,buf,Size);
rt_kprintf("write data len:%d",len);
dfs_file_close(&fd);
}
FINSH_FUNCTION_EXPORT(append, append to file)
不知道那里写错了呢？？？ 试出来了
原来追加还得写呢，参数少了DFS_O_WRONLY 了 嗯，看了追加这个参数，他调用的是FATFS里面的跳转指令，将文件的指针跳转到文件末尾，但是并没有实现写入的命令。
页:
[1]