Dead Time between different channels

[bedirhanhasancebi]

I want to configure dead time between different channels but I get the output as in the picture.Below is the PWM function I created for the BLDC motor and algorithm for each phase of BLDC motor. What could be the problem?

 

 

void BLDC_SetPhase(uint8_t phase)
{
 switch (phase)
 {
 case 0: // AH = 1, AL = 0, BH = 0, BL = 1, CH = KAPALI, CL = KAPALI
 	HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
 	__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_1, 50);
 	HAL_TIMEx_PWMN_Stop(&htim1, TIM_CHANNEL_1);

 	HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_2);
 	HAL_TIMEx_PWMN_Start(&htim1, TIM_CHANNEL_2);
 	__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_2, 50);

 	HAL_TIM_PWM_Stop(&htim1, TIM_CHANNEL_3);
 	HAL_TIMEx_PWMN_Stop(&htim1, TIM_CHANNEL_3);



 	break;
 case 1: // AH = 1, AL = 0, BH = KAPALI, BL = KAPALI, CH = 0, CL = 1
 	HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
 	__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_1, 50);
 	HAL_TIMEx_PWMN_Stop(&htim1, TIM_CHANNEL_1);

 	HAL_TIM_PWM_Stop(&htim1, TIM_CHANNEL_2);
 	HAL_TIMEx_PWMN_Stop(&htim1, TIM_CHANNEL_2);

 	HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_3);
 	HAL_TIMEx_PWMN_Start(&htim1, TIM_CHANNEL_3);
 	__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_3, 50);


 break;
 case 2: // AH = KAPALI, AL = KAPALI, BH = 1, BL = 0, CH = 0, CL = 1
 	HAL_TIM_PWM_Stop(&htim1, TIM_CHANNEL_1);
 	HAL_TIMEx_PWMN_Stop(&htim1, TIM_CHANNEL_1);

 	HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_2);
 	__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_2, 50);
 	HAL_TIMEx_PWMN_Stop(&htim1, TIM_CHANNEL_2);

 	HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_3);
 	HAL_TIMEx_PWMN_Start(&htim1, TIM_CHANNEL_3);
 	__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_3, 50);


 break;
 case 3: // AH = 0, AL = 1, BH = 1, BL = 0, CH = KAPALI, CL = KAPALI
 	HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_2);
 	__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_2, 50);
 	HAL_TIMEx_PWMN_Stop(&htim1, TIM_CHANNEL_2);

 	HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
 	HAL_TIMEx_PWMN_Start(&htim1, TIM_CHANNEL_1);
 	__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_1, 50);

 	HAL_TIM_PWM_Stop(&htim1, TIM_CHANNEL_3);
 	HAL_TIMEx_PWMN_Stop(&htim1, TIM_CHANNEL_3);


 break;
 case 4: // AH = 0, AL = 1, BH = KAPALI, BL = KAPALI, CH = 1, CL = 0
 	HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_3);
 	__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_3, 50);
 	HAL_TIMEx_PWMN_Stop(&htim1, TIM_CHANNEL_3);

 	HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
 	HAL_TIMEx_PWMN_Start(&htim1, TIM_CHANNEL_1);
 	__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_1, 50);

 	HAL_TIM_PWM_Stop(&htim1, TIM_CHANNEL_2);
 	HAL_TIMEx_PWMN_Stop(&htim1, TIM_CHANNEL_2);


 break;
 case 5: // AH = KAPALI, AL = KAPALI, BH = 0, BL = 1, CH = 1, CL = 0
 	HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_3);
 	__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_3, 50);
 	HAL_TIMEx_PWMN_Stop(&htim1, TIM_CHANNEL_3);

 	HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_2);
 	HAL_TIMEx_PWMN_Start(&htim1, TIM_CHANNEL_2);
 	__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_2, 50);

 	HAL_TIM_PWM_Stop(&htim1, TIM_CHANNEL_1);
 	HAL_TIMEx_PWMN_Stop(&htim1, TIM_CHANNEL_1);


 break;
 default:
 break;
 }
}

 

 

 

[TDK]

Dead time is configured in the BDTR register. Doesn't look like you're configuring that anywhere in the posted code. Typically it would be done when initializing the timer.

With HAL, this is done with the HAL_TIMEx_ConfigBreakDeadTime function.