这是我自己写的程序，按理说，应该能生成spwm。可是只有PWM，没有调制成SPWM，求大神看下
#include "DSP28x_project.h"
void initio(void)
{
EALLOW;
GpioCtrlRegs.GPAMUX1.bit.GPIO0=1;
GpioCtrlRegs.GPAMUX1.bit.GPIO1=1;
EDIS;
}
void initpwm1(void)
{
EPwm1Regs.TBPRD=4688;
EPwm1Regs.TBPHS.half.TBPHS=0;
EPwm1Regs.TBCTR=2344;
EPwm1Regs.TBCTL.bit.CTRMODE=TB_COUNT_UPDOWN;
EPwm1Regs.TBCTL.bit.PHSEN=TB_DISABLE;
EPwm1Regs.TBCTL.bit.PRDLD=TB_SHADOW;
EPwm1Regs.TBCTL.bit.SYNCOSEL=TB_SYNC_DISABLE;
EPwm1Regs.TBCTL.bit.HSPCLKDIV=TB_DIV1;
EPwm1Regs.TBCTL.bit.CLKDIV=TB_DIV1;
EPwm1Regs.CMPCTL.bit.SHDWAMODE=CC_SHADOW;
EPwm1Regs.CMPCTL.bit.SHDWBMODE=CC_SHADOW;
EPwm1Regs.CMPCTL.bit.LOADAMODE=CC_CTR_ZERO;
EPwm1Regs.CMPCTL.bit.LOADBMODE=CC_CTR_ZERO;
EPwm1Regs.AQCTLA.bit.CAU=AQ_SET;
EPwm1Regs.AQCTLA.bit.CAD=AQ_CLEAR;
EPwm1Regs.AQCTLB.bit.CAU=AQ_CLEAR;
EPwm1Regs.AQCTLB.bit.CAD=AQ_SET;
EPwm1Regs.DBCTL.bit.IN_MODE=DBA_ALL;
EPwm1Regs.DBCTL.bit.POLSEL=DB_ACTV_LOC;
EPwm1Regs.DBCTL.bit.OUT_MODE=DB_ACTV_LO;
EPwm1Regs.DBRED=125;
EPwm1Regs.DBFED=125;
EPwm1Regs.ETSEL.bit.INTSEL=0x03;
EPwm1Regs.ETSEL.bit.INTEN=0x01;
EPwm1Regs.ETPS.bit.INTPRD=0x03;
}
void initpwmpie(void)
{
EALLOW;
PieVectTable.EPWM1_INT=&pwm1_isrq;
EDIS;
EALLOW;
SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC=0;
EDIS;
initpwm1();
EALLOW;
SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC=1;
EDIS;
GpioDataRegs.GPADAT.bit.GPIO6=0;
IER|=M_INT3;
PieCtrlRegs.PIEIER3.bit.INTx1=1;
EINT;
ERTM;
}
interrupt void pwm1_isrq(void) // EPWM-1
{
// Insert ISR Code here
// Insert ISR Code here
N1=128;
n1=128*(1+i1)/N1-1;
a1=4050;
k1=a1/255;
b1=(unsigned int)(2344-k1*128);
z1=(unsigned int)(k1*sintab[n1]+b1+1);
EPwm1Regs.CMPA.half.CMPA=z1;
EPwm1Regs.CMPB=z1;
i1=i1+1;
if(i1==255)
{
i1=0;
}
EPwm1Regs.ETCLR.bit.INT=1;
PieCtrlRegs.PIEACK.all=PIEACK_GROUP3;
}
#define uint unsigned int
#define uchar unsigned char
unsigned char sintab[]=
{
0x80,0x83,0x86,0x89,0x8D,0x90,0x93,0x96,
0x99,0x9C,0x9F,0xA2,0xA5,0xA8,0xAB,0xAE,
0xB1,0xB4,0xB7,0xBA,0xBC,0xBF,0xC2,0xC5,
0xC7,0xCA,0xCC,0xCF,0xD1,0xD4,0xD6,0xD8,
0xDA,0xDD,0xDF,0xE1,0xE3,0xE5,0xE7,0xE9,
0xEA,0xEC,0xEE,0xEF,0xF1,0xF2,0xF4,0xF5,
0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,
0xFD,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0xFD,
0xFD,0xFC,0xFB,0xFA,0xF9,0xF8,0xF7,0xF6,
0xF5,0xF4,0xF2,0xF1,0xEF,0xEE,0xEC,0xEA,
0xE9,0xE7,0xE5,0xE3,0xE1,0xDE,0xDD,0xDA,
0xD8,0xD6,0xD4,0xD1,0xCF,0xCC,0xCA,0xC7,
0xC5,0xC2,0xBF,0xBC,0xBA,0xB7,0xB4,0xB1,
0xAE,0xAB,0xA8,0xA5,0xA2,0x9F,0x9C,0x99,
0x96,0x93,0x90,0x8D,0x89,0x86,0x83,0x80,
0x80,0x7C,0x79,0x78,0x72,0x6F,0x6C,0x69,
0x66,0x63,0x60,0x5D,0x5A,0x57,0x55,0x51,
0x4E,0x4C,0x48,0x45,0x43,0x40,0x3D,0x3A,
0x38,0x35,0x33,0x30,0x2E,0x2B,0x29,0x27,
0x25,0x22,0x20,0x1E,0x1C,0x1A,0x18,0x16,
0x15,0x13,0x11,0x10,0x0E,0x0D,0x0B,0x0A,
0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,
0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x01,0x02,0x02,
0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A,
0x0B,0x0d,0x0e,0x10,0x11,0x13,0x15,0x16,
0x18,0x1a,0x1c,0x1e,0x20,0x22,0x25,0x27,
0x29,0x2b,0x2e,0x30,0x33,0x35,0x38,0x3a,
0x3d,0x40,0x43,0x45,0x48,0x4c,0x4e,0x51,
0x55,0x57,0x5a,0x5d,0x60,0x63,0x66,0x69,
0x6c,0x6f,0x72,0x76,0x79,0x7c,0x80
};
float k1=0,k2=0,k3=0;
unsigned int i1=0,i2=43,i3=85;
unsigned int fc,fr=50;
unsigned int b1=0,z1,N1,n1;
float a1=0;
void main(void)
{
InitSysCtrl();
DINT;
InitPieCtrl();
IER=0x0000;
IFR=0x0000;
InitPieVectTable();
initio();
initpwmpie();
while(1);
}
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