PWM divider not working

Question

I try to divide pwm like that TIM_InitStruct.TIM_ClockDivision = TIM_CKD_DIV1;

it is not working. I am using stm32f030

TIM_TimeBaseInitTypeDef TIM_InitStruct;

TIM_OCInitTypeDef TIM_OCInitStruct; // OC: Output Channel

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM16, ENABLE); //TIM16 for stm32f030RST6

TIM_InitStruct.TIM_ClockDivision = TIM_CKD_DIV1;

TIM_InitStruct.TIM_CounterMode = TIM_CounterMode_Up;

TIM_InitStruct.TIM_Prescaler = 0 ;

TIM_InitStruct.TIM_Period = 249;//PWMparam.period ;

TIM_InitStruct.TIM_RepetitionCounter = 0;

TIM_TimeBaseInit(PingTIMER, &TIM_InitStruct);

TIM_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM1;

TIM_OCInitStruct.TIM_OutputState = TIM_OutputState_Enable;

TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;

TIM_OCInitStruct.TIM_OCNPolarity = TIM_OCNPolarity_High ;

TIM_OCInitStruct.TIM_OutputNState = TIM_OutputNState_Enable ;

TIM_OCInitStruct.TIM_OCNIdleState = TIM_OCIdleState_Reset;

TIM_OCInitStruct.TIM_OCIdleState = TIM_OCIdleState_Set ;

TIM_OCInitStruct.TIM_Pulse = PWMparam.pulse;

TIM_OC1PreloadConfig(TIM16,TIM_OCPreload_Enable);

TIM_CtrlPWMOutputs(TIM16,ENABLE);

TIM_OC1Init(TIM16, &TIM_OCInitStruct);

TIM_ITConfig(TIM16,TIM_IT_Update,ENABLE);

NVIC_EnableIRQ(TIM16_IRQn);

TIM_Cmd(PingTIMER,ENABLE);

}

waclawek.jan · Answer

> I try to divide pwm like that TIM_InitStruct.TIM_ClockDivision = TIM_CKD_DIV1;

That does not "divide PWM". CKD is a clock for input capture filter and for the deadtime setting.

I don't quite know what do you mean by "divide PWM", but maybe you want to try to change the Prescaler setting.

JW

Sign up