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PRedd.111
Associate III
October 23, 2019
Question

Why is there no pwm output on the pin for timer 15 channel 1N ?

  • October 23, 2019
  • 1 reply
  • 546 views

I used the cube ide to generate code for the timer 15 channel 1N routed to PA1.

prescaler 0

pulse 5000

I only see a flat line on my scope. Why is there no pwm on PA1 ?

static void MX_TIM15_Init(void)
{
 
 /* USER CODE BEGIN TIM15_Init 0 */
 
 /* USER CODE END TIM15_Init 0 */
 
 TIM_ClockConfigTypeDef sClockSourceConfig = {0};
 TIM_MasterConfigTypeDef sMasterConfig = {0};
 TIM_OC_InitTypeDef sConfigOC = {0};
 TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig = {0};
 
 /* USER CODE BEGIN TIM15_Init 1 */
 
 /* USER CODE END TIM15_Init 1 */
 htim15.Instance = TIM15;
 htim15.Init.Prescaler = 0;
 htim15.Init.CounterMode = TIM_COUNTERMODE_UP;
 htim15.Init.Period = 10000;
 htim15.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
 htim15.Init.RepetitionCounter = 0;
 htim15.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
 if (HAL_TIM_Base_Init(&htim15) != HAL_OK)
 {
 Error_Handler();
 }
 sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
 if (HAL_TIM_ConfigClockSource(&htim15, &sClockSourceConfig) != HAL_OK)
 {
 Error_Handler();
 }
 if (HAL_TIM_PWM_Init(&htim15) != HAL_OK)
 {
 Error_Handler();
 }
 sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
 sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
 if (HAL_TIMEx_MasterConfigSynchronization(&htim15, &sMasterConfig) != HAL_OK)
 {
 Error_Handler();
 }
 sConfigOC.OCMode = TIM_OCMODE_PWM2;
 sConfigOC.Pulse = 5000;
 sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
 sConfigOC.OCNPolarity = TIM_OCNPOLARITY_LOW;
 sConfigOC.OCFastMode = TIM_OCFAST_ENABLE;
 sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
 sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;
 if (HAL_TIM_PWM_ConfigChannel(&htim15, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
 {
 Error_Handler();
 }
 sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_DISABLE;
 sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;
 sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
 sBreakDeadTimeConfig.DeadTime = 0;
 sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
 sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
 sBreakDeadTimeConfig.BreakFilter = 0;
 sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
 if (HAL_TIMEx_ConfigBreakDeadTime(&htim15, &sBreakDeadTimeConfig) != HAL_OK)
 {
 Error_Handler();
 }
 /* USER CODE BEGIN TIM15_Init 2 */
 
 /* USER CODE END TIM15_Init 2 */
 HAL_TIM_MspPostInit(&htim15);
 
}

This topic has been closed for replies.

1 reply

waclawek.jan
Super User
October 23, 2019

Read out and check/post the relebant GPIO and TIM registers content.

JW