StackRduino
diff --git a/‎extmod/vfs_fat_file.c‎
Lines changed: 17 additions & 0 deletions b/‎extmod/vfs_fat_file.c‎
Lines changed: 17 additions & 0 deletions
diff --git a/‎lib/oofatfs/ffconf.h‎
Lines changed: 1 addition & 1 deletion b/‎lib/oofatfs/ffconf.h‎
Lines changed: 1 addition & 1 deletion
diff --git a/‎ports/atmel-samd/boards/hallowing_m0_express/board.c‎
Lines changed: 1 addition & 0 deletions b/‎ports/atmel-samd/boards/hallowing_m0_express/board.c‎
Lines changed: 1 addition & 0 deletions
diff --git a/‎ports/atmel-samd/boards/pyportal/board.c‎
Lines changed: 1 addition & 0 deletions b/‎ports/atmel-samd/boards/pyportal/board.c‎
Lines changed: 1 addition & 0 deletions
@@ -197,6 +197,23 @@ STATIC mp_obj_t file_open(fs_user_mount_t *vfs, const mp_obj_type_t *type, mp_ar
         m_del_obj(pyb_file_obj_t, o);
         mp_raise_OSError(fresult_to_errno_table[res]);
     }
+    // If we're reading, turn on fast seek.
+    if (mode == FA_READ) {
+        // one call to determine how much space we need.
+        DWORD temp_table[2];
+        temp_table[0] = 2;
+        o->fp.cltbl = temp_table;
+        f_lseek(&o->fp, CREATE_LINKMAP);
+        DWORD size = (temp_table[0] + 1) * 2;
+        o->fp.cltbl = m_malloc_maybe(size * sizeof(DWORD), false);
+        if (o->fp.cltbl != NULL) {
+            o->fp.cltbl[0] = size;
+            res = f_lseek(&o->fp, CREATE_LINKMAP);
+            if (res != FR_OK) {
+                o->fp.cltbl = NULL;
+            }
+        }
+    }
 
     // for 'a' mode, we must begin at the end of the file
     if ((mode & FA_OPEN_ALWAYS) != 0) {
 
@@ -74,7 +74,7 @@
 /* This option switches f_mkfs() function. (0:Disable or 1:Enable) */
 
 
-#define _USE_FASTSEEK   0
+#define _USE_FASTSEEK   1
 /* This option switches fast seek function. (0:Disable or 1:Enable) */
 
 
 
@@ -94,6 +94,7 @@ void board_init(void) {
         display_init_sequence,
         sizeof(display_init_sequence),
         &pin_PA00);
+    common_hal_displayio_display_set_auto_brightness(display, true);
 }
 
 bool board_requests_safe_mode(void) {
 
@@ -91,6 +91,7 @@ void board_init(void) {
         display_init_sequence,
         sizeof(display_init_sequence),
         &pin_PB31);
+    common_hal_displayio_display_set_auto_brightness(display, true);
 }
 
 bool board_requests_safe_mode(void) {
Original file line number	Diff line number	Diff line change
`@@ -94,6 +94,7 @@ void board_init(void) {`
`94`	`94`	`display_init_sequence,`
`95`	`95`	`sizeof(display_init_sequence),`
`96`	`96`	`&pin_PA00);`
	`97`	`+ common_hal_displayio_display_set_auto_brightness(display, true);`
`97`	`98`	`}`
`98`	`99`
`99`	`100`	`bool board_requests_safe_mode(void) {`
Original file line number	Diff line number	Diff line change
`@@ -91,6 +91,7 @@ void board_init(void) {`
`91`	`91`	`display_init_sequence,`
`92`	`92`	`sizeof(display_init_sequence),`
`93`	`93`	`&pin_PB31);`
	`94`	`+ common_hal_displayio_display_set_auto_brightness(display, true);`
`94`	`95`	`}`
`95`	`96`
`96`	`97`	`bool board_requests_safe_mode(void) {`