【CW32】BLDC

Brushless driver board

PCB design instructions

Software description

void Commutation(unsigned int step,unsigned int OutPwmValue,unsigned int PWM_ON_flag)
{//
if(PWM_ON_flag==0) //Turn off output if not started
{
CW_ATIM->CH1CCRA=0;CW_ATIM->CH2CCRA=0;CW_ATIM->CH3CCRA=0;//Timer output comparison is set to 0
ATIM_CtrlPWMOutputs(DISABLE);
PWM_AL_OFF; PWM_BL_OFF; PWM_CL_OFF;
return;
}

PWM_AL_OFF; PWM_BL_OFF; PWM_CL_OFF;

//Output PWM to the upper bridge, example: AB means (A upper bridge is on, B lower bridge is on)
if(step==0||step==1){CW_ATIM->CH1CCRA=OutPwmValue; CW_ATIM->CH2CCRA=0; CW_ATIM->CH3CCRA=0; } //0:AB; 1:AC
if(step==2||step==3){CW_ATIM->CH1CCRA=0; CW_ATIM->CH2CCRA=OutPwmValue; CW_ATIM->CH3CCRA=0; } //2:BC; 3:BA
if(step==4||step==5){CW_ATIM->CH1CCRA=0; CW_ATIM->CH2CCRA=0; CW_ATIM->CH3CCRA=OutPwmValue;} //4:CA; 5:CB

//Control IO lower bridge
if(step==0||step==5){PWM_AL_OFF; PWM_CL_OFF;PWM_BL_ON;} //AB CB; B lower bridge is turned on
else if(step==1||step==2){ PWM_AL_OFF; PWM_BL_OFF; PWM_CL_ON;}//AC BC; C lower bridge is on
else if(step==3||step==4){ PWM_BL_OFF; PWM_CL_OFF; PWM_AL_ON;}//BA CA; A lower bridge is on

ATIM_CtrlPWMOutputs(ENABLE); //The output is valid
}

void GTIM2_IRQHandler(void)

{	

unsigned int x;



/* USER CODE BEGIN */

if (GTIM_GetITStatus(CW_GTIM2, GTIM_IT_CC1))

{

GTIM_ClearITPendingBit(CW_GTIM2, GTIM_IT_CC1);

}



if (GTIM_GetITStatus(CW_GTIM2, GTIM_IT_CC2))

{

GTIM_ClearITPendingBit(CW_GTIM2, GTIM_IT_CC2);

}


if (GTIM_GetITStatus(CW_GTIM2, GTIM_IT_CC3))



{

GTIM_ClearITPendingBit(CW_GTIM2, GTIM_IT_CC3);

}


HALLcount++; //Hall pulse count	
x=HALL_Check(); //According to the Hall count value, the status
Cur_step=STEP_TAB[x-1]; //Get the commutation sequence bit		
if(Motor_Start_F==1&&ErrorCode==0) //Change phase according to start and stop status
	Commutation(Cur_step,OutPwm,Motor_Start_F);   	



/* USER CODE END */

}

Physical display instructions

thing