From a0f8e9c8bc458b0a34b34864703fd97d9835fd86 Mon Sep 17 00:00:00 2001 From: Alexsander Akers Date: Thu, 27 Jan 2022 11:12:01 -0500 Subject: Implement buzzer methods with AudioContext API --- watch-library/shared/watch/watch_private_buzzer.c | 28 +++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 watch-library/shared/watch/watch_private_buzzer.c (limited to 'watch-library/shared') diff --git a/watch-library/shared/watch/watch_private_buzzer.c b/watch-library/shared/watch/watch_private_buzzer.c new file mode 100644 index 00000000..0618f425 --- /dev/null +++ b/watch-library/shared/watch/watch_private_buzzer.c @@ -0,0 +1,28 @@ +/* + * MIT License + * + * Copyright (c) 2022 Joey Castillo + * + * 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 "driver_init.h" + +// note: the buzzer uses a 1 MHz clock. these values were determined by dividing 1,000,000 by the target frequency. +// i.e. for a 440 Hz tone (A4 on the piano), 1MHz/440Hz = 2273 +const uint16_t NotePeriods[108] = {18182,17161,16197,15288,14430,13620,12857,12134,11453,10811,10204,9631,9091,8581,8099,7645,7216,6811,6428,6068,5727,5405,5102,4816,4545,4290,4050,3822,3608,3405,3214,3034,2863,2703,2551,2408,2273,2145,2025,1911,1804,1703,1607,1517,1432,1351,1276,1204,1136,1073,1012,956,902,851,804,758,716,676,638,602,568,536,506,478,451,426,402,379,358,338,319,301,284,268,253,239,225,213,201,190,179,169,159,150,142,134,127}; -- cgit v1.2.3