N-pulse waveform generation using STM32F767

[VPras]

Hi,

I'm using STM32F767, Im trying to generate N-pulse waveform Generation but i couldn't achieve it.

My TIMER configurations are

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 = 54;

 htim2.Init.CounterMode = TIM_COUNTERMODE_UP;

 htim2.Init.Period = 1000;

 htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;

 htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;

 htim2.Init.RepetitionCounter = 5-1;

 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_OC_Init(&htim2) != HAL_OK)

 {

  Error_Handler();

 }

 if (HAL_TIM_OnePulse_Init(&htim2, TIM_OPMODE_SINGLE) != HAL_OK)

 {

  Error_Handler();

 }

 sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;

 sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;

 if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)

 {

  Error_Handler();

 }

 sConfigOC.OCMode = TIM_OCMODE_RETRIGERRABLE_OPM1;

 sConfigOC.Pulse = 500;

 sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;

 sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;

 if (HAL_TIM_OC_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)

 {

  Error_Handler();

 }

 __HAL_TIM_ENABLE_OCxPRELOAD(&htim2, TIM_CHANNEL_1);

 /* USER CODE BEGIN TIM2_Init 2 */

 /* USER CODE END TIM2_Init 2 */

 HAL_TIM_MspPostInit(&htim2);

}

My APB1 clock is 54MHz. Please help me solve this

Thanks,

Vimal

[waclawek.jan]

Have you read AN4776 ?

Is the respective pin set properly for AF for the given TIM in GPIO?

Can you output "normal" PWM?

I don't Cube.

JW

[VPras]

I have read AN4776 document, I'm trying all configurations mentioned in that application.

Yes, I can generate the normal PWM signal.

i do not want trigger my one pulse mode using another timer. i want to trigger my one pulse every 5 seconds. What configurations do i need to make??

Thanks,

Vimal

[waclawek.jan]

> I want to trigger my one pulse every 5 seconds

If I understand it correctly, you don't want an external event to trigger a pulse, but you want the timer to produce one pulse once in 5 seconds, automatically?

Then set it up for normal to have a period 5 seconds and a normal PWM with relatively short pulse.

If this is not what you intended, describe exactly what do you want to achieve, perhaps attaching a drawing/sketch of the expected waveform.

JW

[Tesla DeLorean]

Some of the 32 bit TIM should permit a period of 5 seconds whilst still having a brief pulse width.

Also be aware that period and prescaler are set as N-1 values, ie 999 would divide by 1000​

[VPras]

Hi,

Sorry for the late reply.

I understood the problem, I wanted to generate 50 Pulses using one Pulse mode. As advanced timer pins are occupied for other purposes, i have to use other general purpose timers to generate 50 Pulses (frequency 1Khz and 50% Duty cycle). How do i generate repetitive pulse using one pulse mode??

Thanks

Vimal