STM32F070RB: TIM15 PWM output NOT working

[Palok Biswas]

Posted on April 08, 2018 at 16:52

I am using HAL driver for initializing the timer modules. PWM works just fine on TIM3, TIM14 etc. but it is NOT working on TIM15 Channel-1. (I had a similar problem with TIM1 as well but it worked when I initialized TIM3 together with it). I know TIM1 and TIM15 are advanced timers and HAL driver does initialize a couple of extra parameters. I am attaching the code to this question. Thank you in advance!

int main(void)

{ /*

Initialization codes . . . */

MX_TIM15_Init();

TIM_OC_InitTypeDef sConfigOC; sConfigOC.OCMode = TIM_OCMODE_PWM1; sConfigOC.Pulse = 150; sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH; sConfigOC.OCFastMode = TIM_OCFAST_DISABLE; HAL_TIM_PWM_ConfigChannel(&htim15, &sConfigOC, TIM_CHANNEL_1); HAL_TIM_PWM_Start(&htim15, TIM_CHANNEL_1); }static void MX_TIM15_Init(void){

TIM_MasterConfigTypeDef sMasterConfig;

TIM_OC_InitTypeDef sConfigOC; TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig;

htim15.Instance = TIM15;

htim15.Init.Prescaler = 0; htim15.Init.CounterMode = TIM_COUNTERMODE_UP; htim15.Init.Period = 255; htim15.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1; htim15.Init.RepetitionCounter = 0; htim15.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE; if (HAL_TIM_PWM_Init(&htim15) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); }

sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;

sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE; if (HAL_TIMEx_MasterConfigSynchronization(&htim15, &sMasterConfig) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); }

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(&htim15, &sConfigOC, TIM_CHANNEL_1) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); }

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.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE; if (HAL_TIMEx_ConfigBreakDeadTime(&htim15, &sBreakDeadTimeConfig) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); }

HAL_TIM_MspPostInit(&htim15);

}

#stm32 #stm32-timer #tim15 #stm32-stm32cube #tim-pwm #stm32f0-hal

[Tesla DeLorean]

Posted on April 08, 2018 at 17:29

Make sure the correct F0 target is selected (defines) so stm32f070xb.h is included

Check the IS_TIM_BREAK_INSTANCE macro, ie find-in-files

Try explicitly enabling output

   /* Enable the main output */

    __HAL_TIM_MOE_ENABLE(&htim15);

For auto/local variables make sure they are explicitly cleared, or that all fields are initialized

{

TIM_MasterConfigTypeDef sMasterConfig = {0};

TIM_OC_InitTypeDef sConfigOC = {0}; TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig = {0};

...

[Palok Biswas]

Posted on April 09, 2018 at 08:42

Turvey.Clive

‌- Thank you for your support. Initializing the code like thisdid the trick!

TIM_OC_InitTypeDef sConfigOC = {0};

sConfigOC.OCMode = TIM_OCMODE_PWM1;

sConfigOC.Pulse = 150;

sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;

sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;

HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_1);

HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);