savelij13
a6bc2e0f07
- Changed heading character of configuration keywords "_" to "FF_". - Removed ASCII-only configuration, FF_CODE_PAGE = 1. Use FF_CODE_PAGE = 437 instead. - Added f_setcp(), run-time code page configuration. (FF_CODE_PAGE = 0) - Improved cluster allocation time on stretch a deep buried cluster chain. - Improved processing time of f_mkdir() with large cluster size by using FF_USE_LFN = 3. - Improved NoFatChain flag of the fragmented file to be set after it is truncated and got contiguous. - Fixed archive attribute is left not set when a file on the exFAT volume is renamed. (appeared at R0.12) - Fixed exFAT FAT entry can be collapsed when write or lseek operation to the existing file is done. (appeared at R0.12c) - Fixed creating a file can fail when a new cluster allocation to the exFAT directory occures. (appeared at R0.12c)
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
/*------------------------------------------------------------/
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/ Open or create a file in append mode
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/ (This function was sperseded by FA_OPEN_APPEND flag at FatFs R0.12a)
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/------------------------------------------------------------*/
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FRESULT open_append (
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FIL* fp, /* [OUT] File object to create */
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const char* path /* [IN] File name to be opened */
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)
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{
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FRESULT fr;
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/* Opens an existing file. If not exist, creates a new file. */
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fr = f_open(fp, path, FA_WRITE | FA_OPEN_ALWAYS);
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if (fr == FR_OK) {
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/* Seek to end of the file to append data */
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fr = f_lseek(fp, f_size(fp));
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if (fr != FR_OK)
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f_close(fp);
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}
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return fr;
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}
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int main (void)
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{
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FRESULT fr;
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FATFS fs;
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FIL fil;
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/* Open or create a log file and ready to append */
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f_mount(&fs, "", 0);
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fr = open_append(&fil, "logfile.txt");
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if (fr != FR_OK) return 1;
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/* Append a line */
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f_printf(&fil, "%02u/%02u/%u, %2u:%02u\n", Mday, Mon, Year, Hour, Min);
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/* Close the file */
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f_close(&fil);
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return 0;
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}
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