基于DSP28035的SPWM生成程序

#include DSP28x_Project.h#include IQmathLib.h/#include math.h#define PWM1_INT_ENABLE 1#define PWM2_INT_ENABLE 1#define PWM3_INT_ENABLE 1#define PWM4_INT_ENABLE 1void InitEPwm1Example(void);void InitEPwm2Example(void);void InitEPwm3Example(void);interrupt void epwm1_timer_isr(void);/interrupt void epwm2_timer_isr(void);/interrupt void epwm3_timer_isr(void);Uint32 EPwm1TimerIntCount;Uint32 EPwm2TimerIntCount;Uint32 EPwm3TimerIntCount;Uint32 EPwm4TimerIntCount;Uint32 TonC1,TonC2;Uint16 k;float32 Tc,N;#define PI 3.1415926float32 M=0.8;float32 fz=20000;float32 fr=50;void main(void) InitSysCtrl(); InitEPwm1Gpio(); / InitEPwm2Gpio(); / InitEPwm3Gpio(); DINT; InitPieCtrl(); IER = 0x0000; IFR = 0x0000; InitPieVectTable(); EALLOW; / This is needed to write to EALLOW protected registers PieVectTable.EPWM1_INT = &epwm1_timer_isr; / PieVectTable.EPWM2_INT = &epwm2_timer_isr; / PieVectTable.EPWM3_INT = &epwm3_timer_isr; EDIS; EALLOW; SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0; / Stop all the TB clocks EDIS; InitEPwm1Example(); / InitEPwm2Example(); / InitEPwm3Example(); EALLOW; SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1; EDIS; EPwm1TimerIntCount = 0; EPwm2TimerIntCount = 0; EPwm3TimerIntCount = 0; IER |= M_INT3; PieCtrlRegs.PIEIER3.bit.INTx1 = PWM1_INT_ENABLE; / PieCtrlRegs.PIEIER3.bit.INTx2 = PWM2_INT_ENABLE; / PieCtrlRegs.PIEIER3.bit.INTx3 = PWM3_INT_ENABLE; EINT; / Enable Global interrupt INTM ERTM; for(;) asm( NOP); void InitEPwm1Example() EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_CTR_ZERO;/zhuyi EPwm1Regs.TBPRD = 1500; /载波周期=2*1500TBCLK EPwm1Regs.TBPHS.half.TBPHS = 0x0000; / Phase is 0 EPwm1Regs.TBCTL.bit.PRDLD = TB_SHADOW; EPwm1Regs.TBCTR = 0x0000; EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN; / Count up down EPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE; / Disable phase loading EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1; / Clock ratio to SYSCLKOUT EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV1; EPwm1Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW; / Load registers every ZERO_PRD EPwm1Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW; EPwm1Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO_PRD; EPwm1Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO_PRD; EPwm1Regs.CMPA.half.CMPA =1000; EPwm1Regs.AQCTLA.bit.CAU = AQ_CLEAR; / Clear PWM1A on CAU EPwm1Regs.AQCTLA.bit.CAD = AQ_SET; EPwm1Regs.AQCTLB.bit.CAU = AQ_SET; / SET PWM1B on CAU EPwm1Regs.AQCTLB.bit.CAD = AQ_CLEAR; /set dead band EPwm1Regs.ETSEL.bit.INTSEL = ET_CTR_PRDZERO; /? Select INT on Zero Prd event EPwm1Regs.ETSEL.bit.INTEN = PWM1_INT_ENABLE; / Enable INT EPwm1Regs.ETPS.bit.INTPRD = ET_1ST;interrupt void epwm1_timer_isr(void) EPwm1TimerIntCount+; if( EPwm1Regs.TBCTR=1500) k=0; N=fz/fr; Tc=1/fz; TonC1=Tc/4*(1+M*sin(k*PI/N); k+=2; if(k(2*N-2) k=0; EPwm1Regs.CMPA.half.CMPA = TonC1; / EPwm1Regs.AQCTLA.bit.CAU = AQ_CLEAR; / Clear PWM1A on CAU / EPwm1Regs.AQCTLA.bit.CAD = AQ_SET; / EPwm1Regs.AQCTLB.bit.CAU = AQ_SET; / SET PWM1B on CAU / EPwm1Regs.AQCTLB.bit.CAD = AQ_CLEAR; else k=1; N=fz/fr; Tc=1/fz; TonC2=Tc/4*(1+M*sin(k*PI/N); k+=2; if(k(2*N-1) k=1; EPwm1Regs.CMPA.half.CMPA = TonC2;/ EPwm1Regs.AQCTLA.bit.CAU = AQ_CLEAR; / Clear PWM1A on CAU/ EPwm1Regs.AQCTLA.bit.CAD = AQ_SET; / EPwm1Regs.AQCTLB.bit.CAU = AQ_SET; / SET PWM1B on CAU / EPwm1Regs.AQCTLB.bit.CAD = AQ_CLEAR; / Clear INT flag for this timer EPwm1Regs.ETCLR.bit.INT = 1; / Acknowledge this interrupt to receive more interrupts from group 3 PieCtrlRegs.PIEACK.all = PIEACK_GROUP3;#include DSP280x_Device.h / DSP280x Headerfile Include File#include DSP280x_Examples.h / DSP280x Examples Include Filevoid InitePWM(void) EALLOW;EPwm1Regs.TBPRD = 600; / Period = 601 TBCLK countsEPwm1Regs.CMPA = 350; / Compare A = 350 TBCLK countsEPwm1Regs.CMPB = 200; / Compare B = 200 TBCLK countsEPwm1Regs.TBPHS = 0; / Set Phase register to zeroEPwm1Regs.TBCTR = 0; / clear TB counterEPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP;EPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE; / Phase loading disabledEPwm1Regs.TBCTL.bit.PRDLD = TB_SHADOW;EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_DISABLE;EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1; / TBCLK = SYSCLKEPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV1;EPwm1Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;EPwm1Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;EPwm1Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO; / load on CTR = ZeroEPwm1Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO; / load on CTR = ZeroEPwm1Regs.AQCTLA.bit.PRD = AQ_CLEAR;EPwm1Regs.AQCTLA.bit.CAU = AQ_SET;EPwm1Regs.AQCTLB.bit.PRD = AQ_CLEAR;EPwm1Regs.AQCTLB.bit.CBU = AQ_SET;EPwm1Regs.DBCTL.bit.OUT_MODE = DB_DISABLE;EPwm1Regs.PCCTL.bit.CHPEN = CHP_DISABLE;EPwm1Regs.TZCTL.bit.TZA = TZ_NO_CHANGE;EPwm1Regs.TZCTL.bit.TZB = TZ_NO_CHANGE;EDIS;1. #includeDSP28_Device.h 2. #includestdio.h 3. #includemath.h 4. #includefloat.h 5. #defineNX404 6. #definePI3.1415925 7. floatM=0.8;8. intk0,h1,h2;9. doubleaNX;10. externinttp=1250;11. 12. voidzkb();13. interruptvoideva_T1UFINT_ISR(void);14. 15. voidmain(void)16. 17. k0=0;18. h1=0;19. h2=0;20. InitSysCtrl();21. DINT;/禁止全局中断 22. IER=0;23. IFR=0;24. EALLOW;25. /EnablePWMpins 26. GpioMuxRegs.GPAMUX.all=0x00FF;/EVAPWM1-6pins 27. /GpioMuxRegs.GPBMUX.all=0x00FF;/EVBPWM7-12pins 28. EDIS;29. InitPieCtrl();30. InitPieVectTable();31. EALLOW;32. PieVectTable.T1UFINT=&eva_T1UFINT_ISR;33. EDIS;34. IER|=M_INT2;35. PieCtrl.PIEIER2.bit.INTx6=1;36. InitEv();37. zkb();38. EvaRegs.T1CON.all=EvaRegs.T1CON.all|0x0040;/启动定时器1 39. EINT;40. while(1)41. 42. asm(NOP);43. 44. 45. voidzkb()46. 47. unsignedintn=0;48. floatq,l,j;49. while(n=375&l3375)62. an=3375;63. else64. an=375;65. 66. 67. n=n+1;68. */69.