TMS320F28335 SVPWM source program

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TMS320F28335 SVPWM source program [Copy link]

The microcontroller source program is as follows: //****************************************************/ //File name: SVPWM.c //Function: Call the 28335 internal PWM module to generate the SVPWM output test file //Description: The input information uses a structure. When using it, changing the structure pointer can change the input signal. // The InitSvpwm() function provides PWM module initialization and the configuration of the corresponding PIE interrupt. // The voltage signal in the stationary plane coordinate system is obtained through the park inverse transformation. // Update the comparator value in the PWM timer underflow interrupt, that is, update once every PWM cycle //********************************************************/ #include "DSP2833x_Device.h" // DSP2833x Headerfile Include File #include "DSP2833x_Examples.h" // DSP2833x Examples Include File #include "math.h" #include "float.h" extern Uint16 RamfuncsRunStart; extern Uint16 RamfuncsLoadStart; extern Uint16 RamfuncsLoadEnd; typedef struct { float ds; // Voltage signal in stationary plane coordinate system float qs; float ang; // Electrical angle Electrical angle = mechanical angle * number of pole pairs float de; // Voltage signal in rotating coordinate system float qe; }IPARK; IPARK ipark1={0,0,0,0.3,0.4}; // IPARK *v=&ipark1; // Change the structure pointer here to change the input void InitSvpwm(void); void InitEPwm1(void); void InitEPwm2(void); void InitEPwm3(void); interrupt void epwm1_isr(void); void ipark(IPARK *v); void svgen(IPARK *v); #define PRD 7500 // PWM周期寄存器 #define PI 3.1415926 float tmr1,tmr2,tmr3; void main(void) { InitSysCtrl(); DINT; InitPieCtrl(); IER = 0x0000; IFR = 0x0000; In itPieVectTable(); MemCopy(&RamfuncsLoadStart, &RamfuncsLoadEnd, &RamfuncsRunStart); //Flash operation


        InitFlash();        
        
        InitSvpwm();


   for(;;)
   {
       asm("          NOP");
   }


}


void InitSvpwm(void)
{  
   InitEPwm1Gpio();
   InitEPwm2Gpio();
   InitEPwm3Gpio();


   EALLOW;
   PieVectTable.EPWM1_INT = &epwm1_isr;
  
   EDIS;


   EALLOW;
   SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0;
   EDIS;


   InitEPwm1();
   InitEPwm2();
   InitEPwm3();


   EALLOW;
   SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1;
   EDIS;


   IER |= M_INT3;


// 使能中断 EPWM INT1 位于PIE中断分组3.1
   PieCtrlRegs.PIEIER3.bit.INTx1 = 1;


   EINT;
   ERTM;
}


interrupt void epwm1_isr(void)
{
   // 更新 CMPA 和 CMPB 寄存器值
   svgen(&ipark1);
   EPwm1Regs.CMPA.half.CMPA=tmr1;
   EPwm2Regs.CMPA.half.CMPA=tmr2;
   EPwm3Regs.CMPA.half.CMPA=tmr3;
   EPwm1Regs.CMPB=tmr1;
   EPwm2Regs.CMPB=tmr2;
   EPwm3Regs.CMPB=tmr3;
   
   // 清除中断标志
   EPwm1Regs.ETCLR.bit.INT = 1;


   // 清除中断响应
   PieCtrlRegs.PIEACK.all = PIEACK_GROUP3;
}




void ipark(IPARK *v)
{
  float  ang;
  ang=(v->ang/360)*2*PI;                    //角度转化为弧度
  v->ds=v->de*cos(ang)-v->qe*sin(ang);      //得到静止平面坐标系下d轴电压
  v->qs=v->qe*cos(ang)+v->de*sin(ang);      //得到静止平面坐标系下q轴电压
}


void svgen(IPARK *v)
{
   float Va,Vb,Vc,t1,t2,Ta,Tb,Tc;
   Uint32 sector=0;                                               // sector=a+2b+4c 扇区状态标示 注意：setor的值1~6与扇区不是顺序对应
   ipark(v);
   Va=v->qs;                                                      // Va = Uq
   Vb=(-0.5) * v->qs + (0.8660254) * v->ds;                       // Vb = 1/2*(sqrt(3)*Ud - Uq)         sqrt(3)/2=0.866
   Vc=(-0.5) * v->qs - (0.8660254) * v->ds;                       // Vc = -1/2*(sqrt(3)Ud + Uq)
   if(Va>0.0000001) // Determine which sector it belongs to sector=1; // Va>0 then a=1; otherwise a=0 if(Vb>0.0000001) // sector=sector+2; // Vb>0 then b=1; otherwise b=0 if(Vc>0.0000001) // sector=sector+4; // Vc>0 then c=1; otherwise c=0 Va=v->qs; Vb=(-0.5) * v->qs + (0.8660254) * v->ds; Vc=(-0.5) * v->qs - (0.8660254) * v->ds; switch(sector){ case 1: //sector==1 corresponds to sector II t1=Vc; t2=Vb; Tb=(0.25)*(1-t1-t2); Ta=Tb+(0.5)*t1; Tc=Ta+(0.5)*t2; break; case 2: //sector==2 corresponds to sector VI t1=Vb; t2=-Va; Ta=(0.25)*(1-t1-t2); Tc=Ta+(0.5)*t1; Tb=Tc+(0.5)*t2; break; case 3: //sector==3 corresponds to sector I t1=-Vc; t2=Va; Ta=(0.25)*(1-t1-t2); Tb=Ta+(0.5)*t1; Tc=Tb+(0.5)*t2; break; case 4: //sector==4 Corresponding sector IV t1=-Va; t2=Vc; Tc=(0.25)*(1-t1-t2); Tb=Tc+(0.5)*t1; Ta=Tb+(0.5)*t2; break; case 5: //sector==5 corresponds to sector III t1=Va; t2=-Vb; Tb=(0.25)*(1-t1-t2); Tc=Tb+(0.5)*t1; Ta=Tc+(0.5)*t2; break; case 6: //sector==6 corresponds to sector V t1=-Vb; t2=-Vc; Tc=(0.25)*(1-t1-t2); Ta=Tc+(0.5)*t1; Tb=Ta+(0.5)*t2; break; default: //Error when sector=0 and sector=7 Ta=0.5; Tb=0.5; Tc=0.5; } tmr1=Ta*PRD; tmr2=Tb*PRD; tmr3=Tc*PRD; } void InitEPwm1() { //Configure clock EPwm1Regs.TBCTL.bit.CTRMODE = 0x2; // Up and down counting mode EPwm1Regs.TBPRD = PRD; // Set period EPwm1Regs.TBCTL.bit.PHSEN = 0x0; // Disable phase load synchronization EPwm1Regs.TBPHS.half.TBPHS = 0x0000; // Phase initial value EPwm1Regs.TBCTR = 0x0000; // Count initial value EPwm1Regs.TBCTL.bit.HSPCLKDIV = 0x1; // TBCLK = SYSCLKOUT / (HSPCLKDIV × CLKDIV) EPwm1Regs.TBCTL.bit.CLKDIV = 0x1; // Configure compare registers EPwm1Regs.CMPCTL.bit.SHDWAMODE = 0x0; // Use shadow registers EPwm1Regs.CMPCTL.bit.SHDWBMODE = 0x0; EPwm1Regs.CMPCTL.bit.LOADAMODE = 0x0; // Update comparator value when counter value is 0 EPwm1Regs.CMPCTL.bit.LOADBMODE = 0x0; // Set comparator initial value EPwm1Regs.CMPA.half.CMPA = 1875; EPwm1Regs.CMPB = 1875; // Mode setting EPwm1Regs.AQCTLA.bit.ZRO = 0x1; // Output low when equal to 0 EPwm1Regs.AQCTLA.bit.CAU = 0x3; // Output inverted when count value = comparison value EPwm1Regs.AQCTLB.bit.ZRO = 0x2; // Output high when equal to 0 EPwm1Regs.AQCTLB.bit.CBU = 0x3; // Output inverted when count value = comparison value // Configure interrupt EPwm1Regs.ETSEL.bit.INTSEL = 0x1; // The count value reaches 0 to trigger an event EPwm1Regs.ETSEL.bit.INTEN = 1; // Enable interrupt EPwm1Regs.ETPS.bit.INTPRD = 0x1; // Every event triggers an interrupt } void InitEPwm2() { EPwm2Regs.TBCTL.bit.CTRMODE = 0x2; EPwm2Regs.TBPRD = PRD; EPwm2Regs.TBCTL.bit.PHSEN = 0x0; EPwm2Regs.TBPHS.half.TBPHS = 0x0000; EPwm2Regs.TBCTR = 0x0000; EPwm2Regs.TBCTL.bit.HSPCLKDIV = 0x1; EPwm2Regs.TBCTL.bit.CL KDIV = 0x1; EPwm2Regs.CMPCTL.bit.SHDWAMODE = 0x0; EPwm2Regs.CMPCTL.bit.SHDWBMODE = 0x0; EPwm2Regs.CMPCTL.bit.LOADAMODE = 0x0; EPwm2Regs.CMPCTL.bit.LOADBMODE = 0x0; EPwm2Regs.CMPA.half.CMPA = 1875; EPwm2Regs.CMPB = 1875; EPwm2Regs.ETSEL.bit. Regs.AQCTLA.bit.CAU = 0x3; EPwm2Regs.AQCTLB.bit.ZRO = 0x2; INTEN = 0;                 //屏蔽中断            
            
}


void InitEPwm3(void)
{
   EPwm3Regs.TBCTL.bit.CTRMODE = 0x2;         
   EPwm3Regs.TBPRD = PRD;                     
   EPwm3Regs.TBCTL.bit.PHSEN = 0x0;            
   EPwm3Regs.TBPHS.half.TBPHS = 0x0000;        
   EPwm3Regs.TBCTR = 0x0000;                    
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