Import of the watch repository from Pebble

src/fw/drivers/vibe.h

@@ -0,0 +1,35 @@
+/*
+ * 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 <stdbool.h>
+#include <stdint.h>
+
+// motor full power
+#define VIBE_STRENGTH_MAX 100
+// motor full reverse
+#define VIBE_STRENGTH_MIN -100
+// motor stopped
+#define VIBE_STRENGTH_OFF 0
+
+void vibe_init(void);
+void vibe_ctl(bool on);
+void vibe_force_off(void);
+void vibe_set_strength(int8_t strength);
+
+//! Return the strength that should be used for braking the motor to a stop.
+int8_t vibe_get_braking_strength(void);