How to configure Timer to generate 7K pulses without using interrupt

[MBhir.11]

Hi,

I am using STM32cube IDE and trying to create project for STM32L151RCT6 MCU .

Requirement is like need to create 7Khz (means 143 microsec )pulse(i.e 71.4 micro sec ON and 71.4 microsec OFF) on Timer 4 channel 1 without using interrupt.

Not using PWM also, using counter method .

I checked some examples , all are interrupt based examples.

Please suggest me any link for reference

[MM..1]

Your condition no PWM is ?? when you ask Timer 4 channel 1, you need define mode for this peripheral.

Datasheet say :  They feature four independent channels each for input capture/output compare, PWM or one-pulse mode output.

For any stable pwm you dont need interrupt or dma , only set registers for your desired mode and start HAL_TIM_PWM_Start(&htim4,TIM_CHANNEL_1);

[MBhir.11]

Hi,

Thanks for your reply i configured like that only channel 1: PWM generation CH1 and other parameter setting to generate 7KHz 50% duty cycle pulse.

I will check in Eval board and update u

[MM..1]

You can set all in MX inspire here

static void MX_TIM2_Init(void)
{
 
 /* USER CODE BEGIN TIM2_Init 0 */
 
 /* USER CODE END TIM2_Init 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 = 22;
 htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
 htim2.Init.Period = 8000;
 htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
 htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;
 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 = 2000;
 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);
 
}