www.pudn.com > STM32F4_bootloader.zip > app1.c, change:2013-09-18,size:1063b


/*------------------------------------------------------------/ 
/ Open or create a file in append mode 
/------------------------------------------------------------*/ 
 
FRESULT open_append ( 
    FIL* fp,            /* [OUT] File object to create */ 
    const char* path    /* [IN]  File name to be opened */ 
) 
{ 
    FRESULT fr; 
 
    /* Opens an existing file. If not exist, creates a new file. */ 
    fr = f_open(fp, path, FA_WRITE | FA_OPEN_ALWAYS); 
    if (fr == FR_OK) { 
        /* Seek to end of the file to append data */ 
        fr = f_lseek(fp, f_size(fp)); 
        if (fr != FR_OK) 
            f_close(fp); 
    } 
    return fr; 
} 
 
 
int main (void) 
{ 
    FRESULT fr; 
    FATFS fs; 
    FIL fil; 
 
    /* Open or create a log file and ready to append */ 
    f_mount(&fs, "", 0); 
    fr = open_append(&fil, "logfile.txt"); 
    if (fr != FR_OK) return 1; 
 
    /* Append a line */ 
    f_printf(&fil, "%02u/%02u/%u, %2u:%02u\n", Mday, Mon, Year, Hour, Min); 
 
    /* Close the file */ 
    f_close(&fil); 
 
    return 0; 
}