1 files changed, 67 insertions, 0 deletions
diff --git a/supervisor/shared/autoreload.c b/supervisor/shared/autoreload.c
new file mode 100644
index 000000000..b1d0f05a9
--- /dev/null
+++ b/supervisor/shared/autoreload.c
@@ -0,0 +1,67 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "autoreload.h"
+
+#include "lib/utils/interrupt_char.h"
+#include "py/mphal.h"
+
+volatile uint32_t autoreload_delay_ms = 0;
+bool autoreload_enabled = false;
+volatile bool reload_next_character = false;
+
+inline void autoreload_tick() {
+    if (autoreload_delay_ms == 0) {
+        return;
+    }
+    if (autoreload_delay_ms == 1 && autoreload_enabled && !reload_next_character) {
+        mp_keyboard_interrupt();
+        reload_next_character = true;
+    }
+    autoreload_delay_ms--;
+}
+
+void autoreload_enable() {
+    autoreload_enabled = true;
+    reload_next_character = false;
+}
+
+void autoreload_disable() {
+    autoreload_enabled = false;
+}
+
+inline bool autoreload_is_enabled() {
+    return autoreload_enabled;
+}
+
+void autoreload_start() {
+    autoreload_delay_ms = CIRCUITPY_AUTORELOAD_DELAY_MS;
+}
+
+void autoreload_stop() {
+    autoreload_delay_ms = 0;
+    reload_next_character = false;
+}