/**
* @brief Callback for the beep timer
* @param None
* @retval None
*/
static void prvBuzzerBeepTimerCallback()
{
/* Only beep if we should beep */
if (prvCurrentSettings.numOfBeeps != 0)
{
prvCurrentSettings.numOfBeeps--;
/* Check if we were beeping last time or not */
if (prvBuzzerIsOn)
{
prvBuzzerIsOn = false;
BUZZER_Off();
}
else
{
prvBuzzerIsOn = true;
BUZZER_TIMER->BUZZER_CCR_REGISTER = (uint16_t)(prvCurrentSettings.volume/200.0 * (BUZZER_PERIOD));
}
xTimerStart(prvBuzzerBeepTimer, 100);
}
/* Otherwise turn it off */
else
{
prvBuzzerIsOn = false;
BUZZER_Off();
}
}
/**
* @brief Callback for the beep timer
* @param None
* @retval None
*/
static void prvBuzzerBeepTimerCallback()
{
/* Only beep if we should beep */
if (prvCurrentSettings.numOfBeeps != 0)
{
prvCurrentSettings.numOfBeeps--;
/* Check if we were beeping last time or not */
if (prvBuzzerIsOn)
{
prvBuzzerIsOn = false;
BUZZER_Off();
}
else
{
prvBuzzerIsOn = true;
BUZZER_SetVolume(prvCurrentSettings.volume);
}
xTimerStart(prvBuzzerBeepTimer, 100);
}
/* Otherwise turn it off */
else
{
prvBuzzerIsOn = false;
BUZZER_Off();
}
}
/**
* @brief Initialize the buzzer
* @param None
* @retval None
*/
void BUZZER_Init()
{
/* Create software timers */
if (prvBuzzerBeepTimer == 0)
prvBuzzerBeepTimer = xTimerCreate("BuzzerBeep", prvCurrentSettings.delayBetweenBeeps, pdFALSE, 0, prvBuzzerBeepTimerCallback);
/* Enable TIMER Clock */
BUZZER_TIMER_CLK_ENABLE;
/* Enable GPIO Clock */
BUZZER_GPIO_CLK_ENABLE;
/* Configure the GPIO as alternate function */
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.Pin = BUZZER_PIN;
GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
GPIO_InitStructure.Alternate = BUZZER_AF_GPIO;
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Speed = GPIO_SPEED_LOW;
HAL_GPIO_Init(BUZZER_PORT, &GPIO_InitStructure);
/* Timer init */
prvTimerHandle.Instance = BUZZER_TIMER;
prvTimerHandle.Init.Period = BUZZER_PERIOD;
prvTimerHandle.Init.Prescaler = prvGetPrescalerForFrequency(prvCurrentSettings.frequency);
prvTimerHandle.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
prvTimerHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
HAL_TIM_PWM_Init(&prvTimerHandle);
/* Output compare init */
TIM_OC_InitTypeDef timerOutputCompare;
timerOutputCompare.OCMode = TIM_OCMODE_PWM1;
timerOutputCompare.Pulse = BUZZERVolume_Off;
timerOutputCompare.OCPolarity = TIM_OCPOLARITY_HIGH;
timerOutputCompare.OCNPolarity = TIM_OCNPOLARITY_HIGH;
timerOutputCompare.OCFastMode = TIM_OCFAST_DISABLE;
timerOutputCompare.OCIdleState = TIM_OCIDLESTATE_SET;
timerOutputCompare.OCNIdleState = TIM_OCNIDLESTATE_SET;
HAL_TIM_PWM_ConfigChannel(&prvTimerHandle, &timerOutputCompare, BUZZER_TIMER_CHANNEL);
/* Start the PWM */
HAL_TIM_PWM_Start(&prvTimerHandle, BUZZER_TIMER_CHANNEL);
BUZZER_Off();
}
