buzzer_arch.c File Reference

Piezo buzzer tone output with a ChibiOS PWM driver. More...

#include <hal.h>
#include "modules/sound/buzzer_arch.h"
#include "mcu_periph/gpio.h"
#include <BOARD_CONFIG>

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Macros
#define	BUZZER_PWM_FREQUENCY   1000000
	PWM timer counting frequency, 1 us resolution.

Functions
void	buzzer_arch_init (void)
void	buzzer_arch_tone (uint16_t freq)
	Play a square wave at freq Hz, 0 for silence.

Variables
static PWMConfig	buzzer_pwm_conf

Detailed Description

Piezo buzzer tone output with a ChibiOS PWM driver.

Definition in file buzzer_arch.c.

Macro Definition Documentation

BUZZER_PWM_FREQUENCY

#define BUZZER_PWM_FREQUENCY   1000000

PWM timer counting frequency, 1 us resolution.

Definition at line 33 of file buzzer_arch.c.

Referenced by buzzer_arch_tone().

Function Documentation

buzzer_arch_init()

void buzzer_arch_init

(

void

)

Definition at line 49 of file buzzer_arch.c.

References BUZZER_AF, BUZZER_GPIO, BUZZER_PIN, BUZZER_PWM_CHANNEL, buzzer_pwm_conf, BUZZER_PWMD, and gpio_setup_pin_af().

Referenced by buzzer_tunes_init().

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buzzer_arch_tone()

void buzzer_arch_tone

(

uint16_t

freq

)

Play a square wave at freq Hz, 0 for silence.

Definition at line 57 of file buzzer_arch.c.

References BUZZER_PWM_CHANNEL, BUZZER_PWM_FREQUENCY, and BUZZER_PWMD.

Referenced by buzzer_tunes_periodic(), start_next_note(), and tune_start().

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Variable Documentation

buzzer_pwm_conf

PWMConfig buzzer_pwm_conf

static

Initial value:

= {
  .frequency = BUZZER_PWM_FREQUENCY,
  .period    = BUZZER_PWM_FREQUENCY / 1000,
  .callback  = NULL,
  .channels  = {
    { .mode = PWM_OUTPUT_DISABLED, .callback = NULL },
    { .mode = PWM_OUTPUT_DISABLED, .callback = NULL },
    { .mode = PWM_OUTPUT_DISABLED, .callback = NULL },
    { .mode = PWM_OUTPUT_DISABLED, .callback = NULL },
  },
  .cr2  = 0,
  .dier = 0
}

Definition at line 35 of file buzzer_arch.c.

Referenced by buzzer_arch_init().