Hello
I would like to use three PWM to output multiple sounds with one buzzer.
First of all, I am testing using two PWM. There is no problem using only one PWM, but there seems to be a problem with the initialization when using two.
APP_PWM_INSTANCE(PWM1,1); // Create the instance "PWM1" using TIMER1 (name, NRF_DRV_TIMER_INSTANCE(num)).
APP_PWM_INSTANCE(PWM2,3); // Create the instance "PWM2" using TIMER2.
void pwm_play_buzzer_duration(uint32_t duration)
{
uint8_t i;
uint32_t duty = 50;
NRF_LOG_INFO("pwm_play_buzzer_duration =>");
ready_flag = false;
//Set the duty cycle - keep trying until PWM is ready...
while (app_pwm_channel_duty_set(&PWM1, 0, duty) == NRF_ERROR_BUSY);
nrf_delay_ms(duration);
app_pwm_disable(&PWM1);
}
void pwm_play_buzzer_duration_2(uint32_t duration)
{
uint8_t i;
uint32_t duty = 50;
NRF_LOG_INFO("pwm_play_buzzer_duration =>");
ready_flag = false;
// Set the duty cycle - keep trying until PWM is ready...
while (app_pwm_channel_duty_set(&PWM2, 0, duty) == NRF_ERROR_BUSY);
nrf_delay_ms(duration);
app_pwm_disable(&PWM2);
}
void pwm_init(void)
{
ret_code_t err_code;
/* 1-channel PWM, 200Hz, output on DK LED pins. */
app_pwm_config_t pwm1_cfg = APP_PWM_DEFAULT_CONFIG_1CH(1500, BUZZER_PIN); //original 5000L
/* Switch the polarity of the second channel. */
pwm1_cfg.pin_polarity[1] = APP_PWM_POLARITY_ACTIVE_HIGH;
/* Initialize and enable PWM. */
err_code = app_pwm_init(&PWM1,&pwm1_cfg,pwm_ready_callback);
APP_ERROR_CHECK(err_code);
app_pwm_enable(&PWM1);
app_pwm_config_t pwm2_cfg = APP_PWM_DEFAULT_CONFIG_1CH(5000, BUZZER_PIN);
pwm2_cfg.pin_polarity[1] = APP_PWM_POLARITY_ACTIVE_HIGH;
err_code = app_pwm_init(&PWM2,&pwm2_cfg,pwm_ready_callback);
APP_ERROR_CHECK(err_code);
app_pwm_enable(&PWM2);
}
How should I set it up when I use multiple PWMs?
Thank you in advance.
