add fatfs

software/sys_controller/src/file.c

@@ -0,0 +1,84 @@
+#include <stdio.h>
+#include "string.h"
+#include "file.h"
+
+FATFS fs;
+
+FRESULT file_mount()
+{
+    return f_mount(&fs, "", 1);
+}
+
+FRESULT file_open(FIL* fil, char* path)
+{
+    return f_open(fil, path, FA_READ);
+}
+
+TCHAR* file_get_string(FIL* fil, char* buff, int len)
+{
+    return f_gets(buff, len, fil);
+}
+
+FRESULT file_close(FIL* fil)
+{
+    return f_close(fil);
+}
+
+FRESULT scan_files (
+    char* path        /* Start node to be scanned (***also used as work area***) */
+)
+{
+    FRESULT res;
+    DIR dir;
+    UINT i;
+    static FILINFO fno;
+
+
+    res = f_opendir(&dir, path);                       /* Open the directory */
+    if (res == FR_OK) {
+        for (;;) {
+            res = f_readdir(&dir, &fno);                   /* Read a directory item */
+            if (res != FR_OK || fno.fname[0] == 0) break;  /* Break on error or end of dir */
+            if (fno.fattrib & AM_DIR) {                    /* It is a directory */
+                i = strlen(path);
+                sprintf(&path[i], "/%s", fno.fname);
+                res = scan_files(path);                    /* Enter the directory */
+                if (res != FR_OK) break;
+                path[i] = 0;
+            } else {                                       /* It is a file. */
+                printf("%s/%s\n", path, fno.fname);
+            }
+        }
+        f_closedir(&dir);
+    }
+
+    return res;
+}
+
+/* Find files (folders excluded) matching a pattern and execute function to a subset (efirst-elast) of matches. Stops on last match or elast, whichever comes first */
+int find_files_exec(char* path, char* pat, FILINFO *fno, int efirst, int elast, void (*func)(FILINFO *fno))
+{
+    FRESULT fr;     /* Return value */
+    DIR dj;         /* Directory object */
+    int i = 0;
+
+    fr = f_findfirst(&dj, fno, path, pat); /* Start to search for photo files */
+
+    while (fr == FR_OK && fno->fname[0]) {         /* Repeat while an item is found */
+        if (!(fno->fattrib & AM_DIR)) {
+            if ((i >= efirst) && (func != NULL))
+                func(fno);
+            if (++i > elast)
+                break;
+        }
+        fr = f_findnext(&dj, fno);                /* Search for next item */
+    }
+
+    f_closedir(&dj);
+
+    //return fr;
+    if (i <= efirst)
+        return 0;
+    else
+        return i-efirst;
+}