[fatdrvce] fix directory listing

Author: mateoconlechuga

examples/library_examples/fatdrvce/fat_dir_tree/src/main.c

@@ -69,13 +69,21 @@ fat_error_t scan_fat_files(char* path)
     faterr = fat_OpenDir(&fat, path, &dir);
     if (faterr != FAT_SUCCESS)
     {
+        printf("error code %d\n", faterr);
         return faterr;
     }
 
     for (;;)
     {
         faterr = fat_ReadDir(&dir, &entry);
-        if (faterr != FAT_SUCCESS || entry.name[0] == 0)
+        if (faterr != FAT_SUCCESS)
+        {
+            printf("error code %d", faterr);
+            break;
+        }
+
+        /* end of entries */
+        if (entry.name[0] == 0)
         {
             break;
         }

src/fatdrvce/fatdrvce.asm

@@ -452,7 +452,7 @@ fat_ReadDir:
 	ld	bc,sizeof fatDirEntry
 	xor	a,a
 	call	ti.MemSet
-	or	a,a
+	xor	a,a
 	sbc	hl,hl				; success, zeroed entry at end
 	pop	ix
 	ret

src/fatdrvce/fatdrvce.h

@@ -140,9 +140,10 @@ fat_error_t fat_Open(fat_t *fat,
 
 /**
  * Closes the FAT filesystem. This is not required to be called, however
- * it will clear the filesystem dirty bit so other OSes don't see the filesystem
- * with potential errors. You cannot use the FAT structure after this call,
- * and should call fat_Open() if you need to modify the filesystem again.
+ * it will clear the filesystem dirty bit so other OSes don't see the
+ * filesystem with potential errors. You cannot use the FAT structure after
+ * this call, and should call fat_Open() if you need to modify the filesystem
+ * again.
  * @param[in] fat Initialized FAT structure type.
  * @return FAT_SUCCESS on success, otherwise error.
  */
@@ -158,11 +159,11 @@ fat_error_t fat_Close(fat_t *fat);
 fat_error_t fat_OpenDir(fat_t *fat, const char *path, fat_dir_t *dir);
 
 /**
- * Gets the next directory entry. If `entry.name[0] = 0`, then there are no more
- * entries to fetch.
+ * Gets the next directory entry. If `entry.name[0]` is `0`, then there
+ * are no more entries to fetch.
  * @param[in] dir Initialized directory handle from fat_OpenDir().
  * @param[out] entry Pointer to store entry information.
- * @return Number of entries found.
+ * @return FAT_SUCCESS on success, otherwise error.
  */
 fat_error_t fat_ReadDir(fat_dir_t *dir, fat_dir_entry_t *entry);