800*320工程文件+初始demo提交

SW/components/modules/fatfs/documents/res/app1.c

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+/*------------------------------------------------------------/
+/ Open or create a file in append mode
+/ (This function was sperseded by FA_OPEN_APPEND flag at FatFs R0.12a)
+/------------------------------------------------------------*/
+
+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;
+}
+