I would like to generate Complementary PWM's with an adjustable deadtime on TIM1,2,3 channels. MCU is STM32F303CB
I understand that this is done by setting the BDTR registers, but can't find a suitable reference/code snippet.
This is what i have so far..
void pwmTimeBase(const TIM_TypeDef *tim, uint32_t period, uint16_t prescaler) {
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
// Time base configuration
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
TIM_TimeBaseStructure.TIM_Period = period - 1;
TIM_TimeBaseStructure.TIM_Prescaler = prescaler - 1;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_CenterAligned1;//WL:CounterMode_Up
TIM_TimeBaseInit((TIM_TypeDef *)tim, &TIM_TimeBaseStructure);
}
void pwmOCInit(const TIM_TypeDef *tim, uint16_t channel, uint32_t inititalValue) {
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_OCStructInit(&TIM_OCInitStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;//WL:clear on compare match
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;//previously Disable
TIM_OCInitStructure.TIM_Pulse = inititalValue;
switch (channel) {
case TIM_Channel_1:
TIM_OC1Init((TIM_TypeDef *)tim, &TIM_OCInitStructure);
break;
case TIM_Channel_2:
TIM_OC2Init((TIM_TypeDef *)tim, &TIM_OCInitStructure);
break;
case TIM_Channel_3:
TIM_OC3Init((TIM_TypeDef *)tim, &TIM_OCInitStructure);
break;
case TIM_Channel_4:
TIM_OC4Init((TIM_TypeDef *)tim, &TIM_OCInitStructure);
break;
}
}
Since i want to generate symmetric PWM's, is the above code correct ?
