Hi , Please find below the clock configuration , I have used TIM2_CH1 for generating PWM signal @ PA0 pin. All timers are configured to 32 MHz only, In my clock configuration , the MCO source is not selectable ( greyed out). And the below code is what I used for the same. Please guide me how to get the desired frequency of PWM signal( atleast 16 MHz) . FYI, I am using STM32 L073RZ board.
The value of htim2.Init.Period was changed many times and at max I have got only 580 Khz signal by setting this value as "55-1".
static void MX_TIM2_Init(void)
{
/* USER CODE BEGIN TIM2_Init 0 */
/* USER CODE END TIM2_Init 0 */
TIM_ClockConfigTypeDef sClockSourceConfig = {0};
TIM_MasterConfigTypeDef sMasterConfig = {0};
TIM_OC_InitTypeDef sConfigOC = {0};
/* USER CODE BEGIN TIM2_Init 1 */
/* USER CODE END TIM2_Init 1 */
htim2.Instance = TIM2;
htim2.Init.Prescaler = 0;
htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
htim2.Init.Period = 55-1;
htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
{
Error_Handler();
}
sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
{
Error_Handler();
}
if (HAL_TIM_PWM_Init(&htim2) != HAL_OK)
{
Error_Handler();
}
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
{
Error_Handler();
}
sConfigOC.OCMode = TIM_OCMODE_PWM1;
sConfigOC.Pulse = 35;
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN TIM2_Init 2 */
/* USER CODE END TIM2_Init 2 */
HAL_TIM_MspPostInit(&htim2);
}
Thanks for pointing out , using RCC and MCO and I could generate 12 MHz clock signal ( square pulse) , but it is ringing like below , kindly guide me where I am doing wrong ( or) the exact output from the MCO will be like this.
Below is the system clock configuration.
/**
* @brief System Clock Configuration
* The system Clock is configured as follows :
* System Clock source = PLL (HSI)
* SYSCLK(Hz) = 12000000
* HCLK(Hz) = 12000000
* AHB Prescaler = 1
* APB1 Prescaler = 4
* APB2 Prescaler = 2
* HSI Frequency(Hz) = 16000000
* PLL_MUL = 6
* PLL_DIV = 2
* Flash Latency(WS) = 1
* @retval None
*/
