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November 25, 2024
Question

Odd Behavior of TIM2 PWM Output on STM32U073

  • November 25, 2024
  • 2 replies
  • 582 views

In a system using FreeRTOS, there are currently two timers: TIM6 (the timer used by FreeRTOS) and TIM3 (a general-purpose timer). I am not experiencing any issues with these timers, and I can successfully run functions like interrupts. However, whenever I try to generate a PWM output using TIM7, I have not been able to achieve it.

Here is the main code.

muratsimsek_0-1732537382675.png

 

 

int main(void)
{

 /* USER CODE BEGIN 1 */

 /* USER CODE END 1 */

 /* MCU Configuration--------------------------------------------------------*/

 /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
 HAL_Init();

 /* USER CODE BEGIN Init */

 /* USER CODE END Init */

 /* Configure the system clock */
 SystemClock_Config();

 /* USER CODE BEGIN SysInit */

 /* USER CODE END SysInit */

 /* Initialize all configured peripherals */
 MX_GPIO_Init();
 MX_ADC1_Init();
 MX_CRC_Init();
 MX_DAC1_Init();
 MX_TIM3_Init();
 MX_USART2_UART_Init();
 MX_TIM2_Init();
 /* USER CODE BEGIN 2 */
 HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_1); <---- STARTING PWM
 /* USER CODE END 2 */

 /* Init scheduler */
 osKernelInitialize();

 /* Call init function for freertos objects (in cmsis_os2.c) */
 MX_FREERTOS_Init();

 /* Start scheduler */
 osKernelStart();

 /* We should never get here as control is now taken by the scheduler */

 /* Infinite loop */
 /* USER CODE BEGIN WHILE */
 while (1)
 {
 /* USER CODE END WHILE */

 /* USER CODE BEGIN 3 */
 }
 /* USER CODE END 3 */
}

 

 

 

    This topic has been closed for replies.

    2 replies

    Technical Moderator
    November 25, 2024

    Hello,


    @muratsimsek wrote:

    However, whenever I try to generate a PWM output using TIM7, I have not been able to achieve it.


    But in the code, nothing about TIM7 but only TIM2:

     MX_TIM2_Init();
     /* USER CODE BEGIN 2 */
     HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_1); <---- STARTING PWM

     

     

    Technical Moderator
    November 25, 2024

    And your title: "Odd Behavior of TIM2 PWM Output on STM32U073" -> confusing information!

    Need to clarify and fix.

    Thanks