diff options
Diffstat (limited to 'watch-library/watch/watch_buzzer.c')
| -rw-r--r-- | watch-library/watch/watch_buzzer.c | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/watch-library/watch/watch_buzzer.c b/watch-library/watch/watch_buzzer.c index 04746416..c6c89a0e 100644 --- a/watch-library/watch/watch_buzzer.c +++ b/watch-library/watch/watch_buzzer.c @@ -23,28 +23,38 @@ */ inline void watch_enable_buzzer() { - PWM_1_init(); + if (!hri_tcc_get_CTRLA_reg(TCC0, TCC_CTRLA_ENABLE)) { + _watch_enable_tcc(); + } } - inline void watch_set_buzzer_period(uint32_t period) { - pwm_set_parameters(&PWM_1, period, period / 2); + hri_tcc_write_PERBUF_reg(TCC0, period); +} + +void watch_disable_buzzer() { + _watch_disable_tcc(); } inline void watch_set_buzzer_on() { - pwm_enable(&PWM_1); + gpio_set_pin_direction(BUZZER, GPIO_DIRECTION_OUT); + gpio_set_pin_function(BUZZER, PINMUX_PA27F_TCC0_WO5); } inline void watch_set_buzzer_off() { - pwm_disable(&PWM_1); + gpio_set_pin_direction(BUZZER, GPIO_DIRECTION_OFF); + gpio_set_pin_function(BUZZER, GPIO_PIN_FUNCTION_OFF); } -const uint16_t NotePeriods[108] = {31047, 29301, 27649, 26079, 24617, 23224, 21923, 20683, 19515, 18418, 17377, 16399, 15477, 14603, 13780, 13004, 12272, 11580, 10926, 10311, 9730, 9181, 8664, 8175, 7714, 7280, 6869, 6483, 6117, 5772, 5447, 5140, 4850, 4577, 4319, 4076, 3846, 3629, 3425, 3232, 3050, 2878, 2715, 2562, 2418, 2282, 2153, 2032, 1917, 1809, 1707, 1611, 1520, 1435, 1354, 1277, 1205, 1137, 1073, 1013, 956, 902, 851, 803, 758, 715, 675, 637, 601, 567, 535, 505, 476, 450, 424, 400, 378, 357, 336, 317, 300, 283, 267, 252, 238, 224, 212, 200, 188, 178, 168, 158, 149, 141, 133, 125, 118, 112, 105, 99, 94, 89, 84, 79, 74, 70, 66, 63}; +// 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}; void watch_buzzer_play_note(BuzzerNote note, uint16_t duration_ms) { if (note == BUZZER_NOTE_REST) { watch_set_buzzer_off(); } else { - pwm_set_parameters(&PWM_1, NotePeriods[note], NotePeriods[note] / 2); + hri_tcc_write_PERBUF_reg(TCC0, NotePeriods[note]); + hri_tcc_write_CCBUF_reg(TCC0, 1, NotePeriods[note] / 2); watch_set_buzzer_on(); } delay_ms(duration_ms); |