I Have coded my STM32F446RE for 10KHz PWM using TIM1 In STM32cubeide.
i am getting pulse but the pk-pk voltage is not 3.3v it is around 150mv.
need help.
Code :
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_DMA_Init();
MX_TIM1_Init();
/* USER CODE BEGIN 2 */
TIM1->CCR1 = 50;
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure the main internal regulator output voltage
*/
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3);
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 15;
RCC_OscInitStruct.PLL.PLLN = 60;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 2;
RCC_OscInitStruct.PLL.PLLR = 2;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
attached scope pic:
Hello @Murali3252
By testing a few examples for the STM32F446RE, I have tried to reproduce the issue.
For example TIM_PWMInput, It uses the TIM to measure the frequency and duty cycle of an external signal. As in your code 10KHz PWM using TIM1, I have modified the code to suit the configurations, and I am getting a pk-pk voltage of around 6 volts, Ampl around 3.3 volts.
You can generate an example for the TIM using CubeMX or check the STM32F4 firmware package to verify your code. It may also be a wires problem.
Attached pic for oscilloscope visualisation:
