Timer Problem

[cereyanmühendisi]

Hi everyone . I have timer problem again. I use STM32G431KBT6. I'm using timers. timer 3 for pwm pulse direction servo motor and timer 8 for pwm speed control dc motor. But when start timer8 pwm, timer 3 is starting same time. What could be the reason for this? My timers set:

[TDK]

Either it's set up as a slave that starts when TIM8 is started, or it's getting started elsewhere, or you are misinterpreting the results.

The relevant slave settings are not shown in your screenshot.

[cereyanmühendisi]

what do you want from me exactly? I can show u. I checked my code. İt is not have problem.

[TDK]

Your IOC file would be helpful, or a fully compile-able program that exhibits the issue. Also would be helpful how you are determining that TIM3 starts exactly when TIM8 starts.

[johnwick954]

It sounds like Timer 3 is being unintentionally triggered when Timer 8 starts. This usually happens if one timer is set to trigger or be synced by another using internal triggers like ITRx.

Check both timers for these in CubeMX or code:

• Master/Slave Mode: disable if not needed

• Trigger Source: set to "internal clock" or "disabled"

• Ensure TIM3 isn’t set to start from an event generated by TIM8

If both timers should run independently, keep them fully decoupled in configuration.

[cereyanmühendisi]

When I set the timer 8 function to comment line, the problem is solved. I cant share this code now but ı have timer calibration code's now. Because I sent to code lines to support unit.

static void MX_TIM3_Init(void)

{



/* USER CODE BEGIN TIM3_Init 0 */



/* USER CODE END TIM3_Init 0 */



TIM_MasterConfigTypeDef sMasterConfig = {0};

TIM_OC_InitTypeDef sConfigOC = {0};



/* USER CODE BEGIN TIM3_Init 1 */



/* USER CODE END TIM3_Init 1 */

htim3.Instance = TIM3;

htim3.Init.Prescaler = 1;

htim3.Init.CounterMode = TIM_COUNTERMODE_UP;

htim3.Init.Period = 3599;

htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;

htim3.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;

if (HAL_TIM_PWM_Init(&htim3) != HAL_OK)

{

Error_Handler();

}

sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;

sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;

if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL_OK)

{

Error_Handler();

}

sConfigOC.OCMode = TIM_OCMODE_PWM1;

sConfigOC.Pulse = 0;

sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;

sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;

if (HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)

{

Error_Handler();

}

/* USER CODE BEGIN TIM3_Init 2 */



/* USER CODE END TIM3_Init 2 */

HAL_TIM_MspPostInit(&htim3);





static void MX_TIM8_Init(void)

{



/* USER CODE BEGIN TIM8_Init 0 */



/* USER CODE END TIM8_Init 0 */



TIM_MasterConfigTypeDef sMasterConfig = {0};

TIM_OC_InitTypeDef sConfigOC = {0};

TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig = {0};



/* USER CODE BEGIN TIM8_Init 1 */



/* USER CODE END TIM8_Init 1 */

htim8.Instance = TIM8;

htim8.Init.Prescaler = 1;

htim8.Init.CounterMode = TIM_COUNTERMODE_UP;

htim8.Init.Period = 3599;

htim8.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;

htim8.Init.RepetitionCounter = 0;

htim8.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;

if (HAL_TIM_PWM_Init(&htim8) != HAL_OK)

{

Error_Handler();

}

sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;

sMasterConfig.MasterOutputTrigger2 = TIM_TRGO2_RESET;

sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;

if (HAL_TIMEx_MasterConfigSynchronization(&htim8, &sMasterConfig) != HAL_OK)

{

Error_Handler();

}

sConfigOC.OCMode = TIM_OCMODE_PWM1;

sConfigOC.Pulse = 0;

sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;

sConfigOC.OCNPolarity = TIM_OCNPOLARITY_HIGH;

sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;

sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;

sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;

if (HAL_TIM_PWM_ConfigChannel(&htim8, &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.BreakAFMode = TIM_BREAK_AFMODE_INPUT;

sBreakDeadTimeConfig.Break2State = TIM_BREAK2_DISABLE;

sBreakDeadTimeConfig.Break2Polarity = TIM_BREAK2POLARITY_HIGH;

sBreakDeadTimeConfig.Break2Filter = 0;

sBreakDeadTimeConfig.Break2AFMode = TIM_BREAK_AFMODE_INPUT;

sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;

if (HAL_TIMEx_ConfigBreakDeadTime(&htim8, &sBreakDeadTimeConfig) != HAL_OK)

{

Error_Handler();

}

/* USER CODE BEGIN TIM8_Init 2 */



/* USER CODE END TIM8_Init 2 */

HAL_TIM_MspPostInit(&htim8);

[cereyanmühendisi]

I dont think so because ı did not like settings. I shared the settings in befoıe message.