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big PWM refactor: drive both LEDs and buzzer from TCC

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This commit is contained in:
Joey Castillo
2021-08-29 17:40:44 -04:00
parent 7dc4b0fdc6
commit 6353d25d46
8 changed files with 120 additions and 76 deletions
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10
watch-library/watch/watch_buzzer.h
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@@ -32,11 +32,17 @@
void watch_enable_buzzer();
/** @brief Sets the period of the buzzer.
* @param period The period of a single cycle for the PWM peripheral. You can use the following formula to
* convert a desired frequency to a period for this function: period = 513751 * (freq^−1.0043)
* @param period The period of a single cycle for the TCC peripheral. You can determine the period for
* a desired frequency with the following formula: period = 1000000 / freq
*/
void watch_set_buzzer_period(uint32_t period);
/** @brief Disables the TCC peripheral that drives the buzzer.
* @note If you are using PWM to set custom LED colors, this method will also disable the LED PWM driver,
* since the buzzer and LED both make use of the same peripheral to drive their PWM behavior.
*/
void watch_disable_buzzer();
/** @brief Turns the buzzer output on. It will emit a continuous sound at the given frequency.
* @note The TCC peripheral that drives the buzzer does not run in standby mode; if you wish for buzzer
* output to continue, you should prevent your app from going to sleep.