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1、Four short words sum up what has lifted most successful individuals above the crowd: a little bit more.-author-datesvpwm源程序svpwm源程序/ TI File $Revision: /main/8 $/ Checkin $Date: April 21, 2008 15:41:53 $/#/ FILE: Example_2833xEPwmUpDownAQ.c/ TITLE: 空间电压矢量产生程序SVPWM/ ASSUMPTIONS:/ This program require
2、s the DSP2833x header files. / Monitor ePWM1-ePWM3 pins on an oscilloscope as described/ below./ EPWM1A is on GPIO0-5脚/ EPWM1B is on GPIO1-6脚/ EPWM2A is on GPIO2-7脚/ EPWM2B is on GPIO3-10脚/ EPWM3A is on GPIO4-11脚/ EPWM3B is on GPIO5-12脚/#/ $TI Release: DSP2833x/DSP2823x Header Files V1.20 $/ $Releas
3、e Date: August 1, 2008 $/#include DSP28x_Project.h / Device Headerfile and Examples Include File/ Prototype statements for functions found within this file.void InitEPwm1Example(void);void InitEPwm2Example(void);void InitEPwm3Example(void);void svpwmGen(void);interrupt void svpwm_isr(void);volatile
4、float Ualpha,Ubeta;volatile float A,B,C;volatile float T0,T1,T2,T3,T4,T5,T6;volatile float Taon,Tbon,Tcon;float Ua,Ub,Uc;float Ts;int a,b,c;int N= 0,sector= 0;#define TPRD 800#define Udc 800void main(void)/ Step 1. Initialize System Control:/ PLL, WatchDog, enable Peripheral Clocks/ This example fun
5、ction is found in the DSP2833x_SysCtrl.c file. InitSysCtrl();/ Step 2. Initalize GPIO: / This example function is found in the DSP2833x_Gpio.c file and/ illustrates how to set the GPIO to its default state./ InitGpio(); / Skipped for this example / For this case just init GPIO pins for ePWM1, ePWM2,
6、 ePWM3/ These functions are in the DSP2833x_EPwm.c file InitEPwm1Gpio(); InitEPwm2Gpio(); InitEPwm3Gpio(); / Step 3. Clear all interrupts and initialize PIE vector table:/ Disable CPU interrupts DINT;/ Initialize the PIE control registers to their default state./ The default state is all PIE interru
7、pts disabled and flags/ are cleared. / This function is found in the DSP2833x_PieCtrl.c file. InitPieCtrl(); / Disable CPU interrupts and clear all CPU interrupt flags: IER = 0x0000; IFR = 0x0000;/ Initialize the PIE vector table with pointers to the shell Interrupt / Service Routines (ISR). / This
8、will populate the entire table, even if the interrupt/ is not used in this example. This is useful for debug purposes./ The shell ISR routines are found in DSP2833x_DefaultIsr.c./ This function is found in DSP2833x_PieVect.c. InitPieVectTable();/ Interrupts that are used in this example are re-mappe
9、d to/ ISR functions found within this file. EALLOW; / This is needed to write to EALLOW protected registers PieVectTable.EPWM1_INT = &svpwm_isr; /PieVectTable.EPWM2_INT = &epwm2_isr; /PieVectTable.EPWM3_INT = &epwm3_isr; EDIS; / This is needed to disable write to EALLOW protected registers/ Step 4.
10、Initialize all the Device Peripherals:/ This function is found in DSP2833x_InitPeripherals.c/ InitPeripherals(); / Not required for this example/ For this example, only initialize the ePWM EALLOW; SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0; EDIS; InitEPwm1Example(); InitEPwm2Example(); InitEPwm3Example()
11、; EALLOW; SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1; EDIS;/ Step 5. User specific code, enable interrupts:/ Enable CPU INT3 which is connected to EPWM1-3 INT: IER |= M_INT3;/ Enable EPWM INTn in the PIE: Group 3 interrupt 1-3 PieCtrlRegs.PIEIER3.bit.INTx1 = 1; /PieCtrlRegs.PIEIER3.bit.INTx2 = 1; /PieCtr
12、lRegs.PIEIER3.bit.INTx3 = 1;/ Enable global Interrupts and higher priority real-time debug events: EINT; / Enable Global interrupt INTM ERTM; / Enable Global realtime interrupt DBGM / Step 6. IDLE loop. Just sit and loop forever (optional): for(;) asm( NOP); /main结束 /=interrupt void svpwm_isr(void)s
13、vpwmGen();/ Set Compare valuesEPwm1Regs.CMPA.half.CMPA = Taon; / adjust duty for output EPWM1AEPwm2Regs.CMPA.half.CMPA = Tbon; / adjust duty for output EPWM2AEPwm3Regs.CMPA.half.CMPA = Tcon; / adjust duty for output EPWM3A / Clear INT flag for this timerEPwm1Regs.ETCLR.bit.INT = 1;/ Acknowledge this
14、 interrupt to receive more interrupts from group 3PieCtrlRegs.PIEACK.all = PIEACK_GROUP3;void InitEPwm1Example()/ Setup TBCLKEPwm1Regs.TBPRD = TPRD; / TPRD=800,Period = 1600 TBCLK countsEPwm1Regs.TBPHS.half.TBPHS = 0; / Set Phase register to zeroEPwm1Regs.TBCTR = 0x0000; / Clear counter/ Setup count
15、er modeEPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN;/ Symmetrical modeEPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE; /Master moduleEPwm1Regs.TBCTL.bit.PRDLD = TB_SHADOW;EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_CTR_ZERO; / Sync down-stream module/ Setup TpwmEPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV2; / Clock ratio t
16、o SYSCLKOUTEPwm1Regs.TBCTL.bit.CLKDIV = 5; /原为TB_DIV1， 对于上下计数：Tpwm = 2 x TBPRD x TTBCLK Fpwm = 1 / (Tpwm)/Setup shadowingEPwm1Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;EPwm1Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;EPwm1Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO; / load on CTR=ZeroEPwm1Regs.CMPCTL.bit.LOADBMOD
17、E = CC_CTR_ZERO; / load on CTR=Zero/ Set actionsEPwm1Regs.AQCTLA.bit.CAU = AQ_SET; / set actions for EPWM1AEPwm1Regs.AQCTLA.bit.CAD = AQ_CLEAR;/ Set Dead-bandEPwm1Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE; / enable Dead-band moduleEPwm1Regs.DBCTL.bit.POLSEL = DB_ACTV_HIC; / Active Hi complementaryEPw
18、m1Regs.DBFED = 50; / FED = 50 TBCLKsEPwm1Regs.DBRED = 50; / RED = 50 TBCLKs/ Interrupt where we will change the Compare ValuesEPwm1Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO; / Select INT on Zero eventEPwm1Regs.ETSEL.bit.INTEN = 1; / Enable INTEPwm1Regs.ETPS.bit.INTPRD = ET_3RD; / Generate INT on 3rd event
19、 /*/ Set Compare values/=EPwm1Regs.CMPA.half.CMPA = 500; / adjust duty for output EPWM1AEPwm2Regs.CMPA.half.CMPA = 600; / adjust duty for output EPWM2AEPwm3Regs.CMPA.half.CMPA = 700; / adjust duty for output EPWM3A*/void InitEPwm2Example()/ Setup TBCLKEPwm2Regs.TBPRD = TPRD; / TPRD=800,Period = 1600
20、 TBCLK countsEPwm2Regs.TBPHS.half.TBPHS = 0; / Set Phase register to zeroEPwm2Regs.TBCTR = 0x0000; / Clear counter/ Setup counter modeEPwm2Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN;/ Symmetrical modeEPwm2Regs.TBCTL.bit.PHSEN = TB_ENABLE; / Slave moduleEPwm2Regs.TBCTL.bit.PRDLD = TB_SHADOW;EPwm2Regs.T
21、BCTL.bit.SYNCOSEL = TB_SYNC_IN; / sync flow-through/ Setup TpwmEPwm2Regs.TBCTL.bit.HSPCLKDIV = TB_DIV2; / Clock ratio to SYSCLKOUTEPwm2Regs.TBCTL.bit.CLKDIV = 5; / For Up and Down Count-Tpwm = 2 x TBPRD x TTBCLK; Fpwm = 1 / (Tpwm)/ Setup shadowingEPwm2Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;EPwm2Regs.
22、CMPCTL.bit.SHDWBMODE = CC_SHADOW;EPwm2Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO; / load on CTR=ZeroEPwm2Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO; / load on CTR=Zero/ Set actionsEPwm2Regs.AQCTLA.bit.CAU = AQ_SET; / set actions for EPWM2AEPwm2Regs.AQCTLA.bit.CAD = AQ_CLEAR;/ Set Dead-bandEPwm2Regs.DBCTL.
23、bit.OUT_MODE = DB_FULL_ENABLE; / enable Dead-band moduleEPwm2Regs.DBCTL.bit.POLSEL = DB_ACTV_HIC; / Active Hi complementaryEPwm2Regs.DBFED = 50; / FED = 50 TBCLKsEPwm2Regs.DBRED = 50; / RED = 50 TBCLKs/ Interrupt where we will change the Compare ValuesEPwm2Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO; / Sele
24、ct INT on Zero eventEPwm2Regs.ETSEL.bit.INTEN = 1; / Enable INTEPwm2Regs.ETPS.bit.INTPRD = ET_3RD; / Generate INT on 3rd event / Set Compare valuesvoid InitEPwm3Example()/ Setup TBCLKEPwm3Regs.TBPRD = TPRD; / TPRD=800,Period = 1600 TBCLK countsEPwm3Regs.TBPHS.half.TBPHS = 0; / Set Phase register to
25、zeroEPwm1Regs.TBCTR = 0x0000; / Clear counter/ Setup counter modeEPwm3Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN;/ Symmetrical modeEPwm3Regs.TBCTL.bit.PHSEN = TB_ENABLE; / Slave moduleEPwm3Regs.TBCTL.bit.PRDLD = TB_SHADOW;EPwm3Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_IN; / sync flow-through/ Setup TpwmEPwm3R
26、egs.TBCTL.bit.HSPCLKDIV = TB_DIV2; / Clock ratio to SYSCLKOUTEPwm3Regs.TBCTL.bit.CLKDIV = 5; / For Up and Down Count:Tpwm = 2 x TBPRD x TTBCLK; Fpwm = 1 / (Tpwm)/ Setup shadowingEPwm3Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;EPwm3Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;EPwm3Regs.CMPCTL.bit.LOADAMODE = CC_
27、CTR_ZERO; / load on CTR=ZeroEPwm3Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO; / load on CTR=Zero/ Set actionsEPwm3Regs.AQCTLA.bit.CAU = AQ_SET; / set actions for EPWM3AEPwm3Regs.AQCTLA.bit.CAD = AQ_CLEAR;/ Set Dead-bandEPwm3Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE; / enable Dead-band moduleEPwm3Regs.DBC
28、TL.bit.POLSEL = DB_ACTV_HIC; / Active Hi complementaryEPwm3Regs.DBFED = 50; / FED = 50 TBCLKsEPwm3Regs.DBRED = 50; / RED = 50 TBCLKs/ Interrupt where we will change the Compare ValuesEPwm3Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO; / Select INT on Zero eventEPwm3Regs.ETSEL.bit.INTEN = 1; / Enable INTEPwm3R
29、egs.ETPS.bit.INTPRD = ET_3RD; / Generate INT on 3rd event / Set Compare valuesvoid svpwmGen(void) /clarke Ualpha= 0.6666667*(Ua-0.5*Ub-0.5*Uc);/ 0.8660254 = sqrt(3)/2 Ubeta = 0.6666667*(0.8660254*Ub-0.8660254*Uc );/0.6666667=2/3/sector A= Ubeta; B= 1.7320508*Ualpha-Ubeta; C= -1.7320508*Ualpha-Ubeta;
30、 if(A= 0) a= 1; else a= 0; if(B= 0) b= 1; else b= 0; if(C= 0) c= 1; else c= 0; N=a+2*b+4*c; switch(N) case 1: sector = 2; break; case 2: sector = 6; break; case 3: sector = 1; break; case 4: sector = 4; break; case 5: sector = 3; break; case 6: sector = 5; break; default: break; /Time Ts=2*TPRD;/Ts为
31、开关周期与载波周期（计数周期）相等 if(sector= 1) T1= 1.5*Ts*(Ualpha-0.5773503*Ubeta)/Udc;/0.5773503=1/sqrt(3) T2= 1.7320508*Ts*Ubeta/Udc; T0= Ts-T1-T2; if(T1+T2Ts) T1= T1*Ts/(T1+T2); T2= T2*Ts/(T1+T2); T0= Ts-T1-T2; else if(sector= 2) T2= 1.5*Ts*(Ualpha+0.5773503*Ubeta)/Udc; T3= 1.5*Ts*(0.5773503*Ubeta-Ualpha)/Udc;
32、T0= Ts-T2-T3; if(T2+T3Ts) T2= T2*Ts/(T2+T3); T3= T3*Ts/(T2+T3); T0= Ts-T2-T3; else if(sector= 3) T3= 1.7320508*Ts*Ubeta/Udc; T4= 1.5*Ts*(Ualpha+0.5773503*Ubeta)/Udc; T0= Ts-T3-T4; if(T3+T4Ts) T3= T3*Ts/(T3+T4); T4= T4*Ts/(T3+T4); T0= Ts-T3-T4; else if(sector= 4) T4= 1.5*Ts*(0.5773503*Ubeta-Ualpha)/U
33、dc;/0.5773503=1/sqrt(3) T5= 1.7320508*Ts*Ubeta/Udc; T0= Ts-T4-T5; if(T4+T5Ts) T4= T4*Ts/(T4+T5); T5= T5*Ts/(T4+T5); T0= Ts-T4-T5; else if(sector= 5) T5= -1.5*Ts*(Ualpha+0.5773503*Ubeta)/Udc; T6= -1.5*Ts*(0.5773503*Ubeta-Ualpha)/Udc; T0= Ts-T5-T6; if(T5+T6Ts) T5= T5*Ts/(T5+T6); T6= T6*Ts/(T5+T6); T0=
34、 Ts-T5-T6; else if(sector= 6) T6= -1.7320508*Ts*Ubeta/Udc; T1= 1.5*Ts*(Ualpha+0.5773503*Ubeta)/Udc; T0= Ts-T6-T1; if(T6+T1Ts) T6= T6*Ts/(T6+T1); T1= T1*Ts/(T6+T1); T0= Ts-T6-T1; /Switch Time switch(sector) case 1: Taon= T0/4+T1/2+T2/2; Tbon= T0/4+T2/2;Tcon= T0/4; break; case 2: Taon= T0/4+T3/2; Tbon
35、= T0/4+T2/2+T3/2; Tcon= T0/4;break; case 3: Taon= T0/4; Tbon= T0/4+T3/2+T4/2; Tcon= T0/4+T4/2;break; case 4: Taon= T0/4; Tbon= T0/4+T5/2; Tcon= T0/4+T4/2+T5/2;break; case 5: Taon= T0/4+T6/2; Tbon= T0/4; Tcon= T0/4+T5/2+T6/2;break; case 6: Taon= T0/4+T6/2+T1/2; Tbon= T0/4; Tcon= T0/4+T1/2;break; default: break; /svpwmGen(void)结束-