Import of the watch repository from Pebble

platform/robert/boot/src/drivers/exti.h

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "board/board.h"
+
+typedef enum {
+  ExtiTrigger_Rising,
+  ExtiTrigger_Falling,
+  ExtiTrigger_RisingFalling
+} ExtiTrigger;
+
+//! See section 12.2.5 "External interrupt/event line mapping" in the STM32F2 reference manual
+typedef enum {
+  ExtiLineOther_RTCAlarm = 17,
+  ExtiLineOther_RTCWakeup = 22
+} ExtiLineOther;
+
+typedef void (*ExtiHandlerCallback)(void);
+
+//! Configures the given EXTI and NVIC for the given configuration.
+void exti_configure_pin(ExtiConfig cfg, ExtiTrigger trigger, ExtiHandlerCallback cb);
+//! Configures the given EXTI and NVIC for the given configuration.
+void exti_configure_other(ExtiLineOther exti_line, ExtiTrigger trigger);
+
+static inline void exti_enable(ExtiConfig config);
+static inline void exti_disable(ExtiConfig config);
+
+void exti_enable_other(ExtiLineOther);
+void exti_disable_other(ExtiLineOther);
+
+#include "exti.inl.h"