bring in Chirpy face

watch-faces/io/chirpy_demo_face.h

@@ -0,0 +1,69 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2023 <#author_name#>
+ *
+ * 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.
+ */
+
+#ifndef CHIRPY_DEMO_FACE_H_
+#define CHIRPY_DEMO_FACE_H_
+
+/*
+ * CHIRPY DEMO FACE
+ * 
+ * This face demonstrates the chirpy-tx library. It is intended to help you
+ * include chirpy-tx in your own watch faces that need to transmit data out
+ * of the watch.
+ * 
+ * The face's first screen lets you select from a few built-in transmissions:
+ * 
+ * SCALE cycles through frequencies in fixed increments. This is intended to
+ * collect and analyze audio samples from different watches. With this info
+ * it may be possible to improve chirpy-tx's parameters like the frequencies
+ * it uses to make the method more robust.
+ * 
+ * SHORT is a small transmission that contains data taked from the activity_face.
+ * 
+ * LONG is a longer transmission that contains the first two strophes of a
+ * famous sea shanty.
+ * 
+ * Select the transmission you want with ALARM, the press LONG ALARM to chirp.
+ * 
+ * To record and decode a chirpy transmission on your computer, you can use the web app here:
+ * https://jealousmarkup.xyz/off/chirpy/rx/
+ */
+
+#include "movement.h"
+
+void chirpy_demo_face_setup(uint8_t watch_face_index, void ** context_ptr);
+void chirpy_demo_face_activate(void *context);
+bool chirpy_demo_face_loop(movement_event_t event, void *context);
+void chirpy_demo_face_resign(void *context);
+
+#define chirpy_demo_face ((const watch_face_t){ \
+    chirpy_demo_face_setup, \
+    chirpy_demo_face_activate, \
+    chirpy_demo_face_loop, \
+    chirpy_demo_face_resign, \
+    NULL, \
+})
+
+#endif // CHIRPY_DEMO_FACE_H_
+