//The wav sample format is from 8bit sound, 8K Hz in an hexadecimal converted array
The given below is details of my TIM2 Init function.
static void MX_TIM2_Init(void)
{
TIM_MasterConfigTypeDef sMasterConfig;
TIM_OC_InitTypeDef sConfigOC;
htim2.Instance = TIM2;
htim2.Init.Prescaler = 0;
htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
htim2.Init.Period = 8999;
htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
if (HAL_TIM_PWM_Init(&htim2) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
sConfigOC.OCMode = TIM_OCMODE_PWM1;
sConfigOC.Pulse = 0;
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
HAL_TIM_MspPostInit(&htim2);
}
And this is details of my PWM Interrupt handler function where I am changing the data for next pulse.
void HAL_TIM_PWM_PulseFinishedCallback(TIM_HandleTypeDef *htim)
{
uprint("Pulse Finished-\r\n");
if(i<4096)
{
i = i + j;
//data is an array of 8 bit sample from raw wav file
uint16_t v = (data[i]);
__HAL_TIM_SET_COMPARE(&htim2, TIM_CHANNEL_1, v);
}
else
{
HAL_GPIO_TogglePin (GPIOC, GPIO_PIN_13);
i=0;
}
}
This is my main function details.
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_USART3_UART_Init();
MX_TIM2_Init();
HAL_TIM_PWM_Start_IT(&htim2, TIM_CHANNEL_1);
while (1)
{
}
}
