求DSP28335产生SPWM波形程序

没有

直接找TI的例程

请问你最后找到了28335 产生SPWM 的程序了吗？

#include "DSP2833x_Device.h"     // DSP2833x Headerfile Include File#include "DSP2833x_Examples.h"   // DSP2833x Examples Include File

double sin_180[]={0.000000,0.034899,0.069756,0.104528,0.139173,0.173648,0.207911,0.241921,0.275637,0.309016,                  0.342020,0.374606,0.406736,0.438371,0.469471,0.500000,0.529919,0.559192,0.587785,0.615661,                  0.642787,0.669130,0.694658,0.719339,0.743144,0.766044,0.788010,0.809016,0.829037,0.848048,                  0.866025,0.882947,0.898794,0.913545,0.927183,0.939692,0.951056,0.961261,0.970295,0.978147,                  0.984807,0.990268,0.994521,0.997564,0.999390,1.000000,0.999390,0.997564,0.994521,0.990268,                  0.984807,0.978147,0.970295,0.961261,0.951056,0.939692,0.927183,0.913545,0.898794,0.882947,                  0.866025,0.848048,0.829037,0.809016,0.788010,0.766044,0.743144,0.719339,0.694658,0.669130,                  0.642787,0.615661,0.587785,0.559919,0.529919,0.500000,0.469471,0.438371,0.406736,0.374606,                  0.342020,0.309016,0.275637,0.241921,0.207911,0.173648,0.139173,0.104528,0.069756,0.034899,                  0.000000,-0.034899,-0.069756,-0.104528,-0.139173,-0.173648,-0.207911,-0.241921,-0.275637,-0.309016,                 -0.342020,-0.374606,-0.406736,-0.438371,-0.469471,-0.500000,-0.529919,-0.559192,-0.587785,-0.615661,                 -0.642787,-0.669130,-0.694658,-0.719339,-0.743144,-0.766044,-0.788010,-0.809016,-0.829037,-0.848048,                 -0.866025,-0.882947,-0.898794,-0.913545,-0.927183,-0.939692,-0.951056,-0.961261,-0.970295,-0.978147,                 -0.984807,-0.990268,-0.994521,-0.997564,-0.999390,-1.000000,-0.999390,-0.997564,-0.994521,-0.990268,                 -0.984807,-0.978147,-0.970295,-0.961261,-0.951056,-0.939692,-0.927183,-0.913545,-0.898794,-0.882947,                 -0.866025,-0.848048,-0.829037,-0.809016,-0.788010,-0.766044,-0.743144,-0.719339,-0.694658,-0.669130,                 -0.642787,-0.615661,-0.587785,-0.559919,-0.529919,-0.500000,-0.469471,-0.438371,-0.406736,-0.374606,                 -0.342020,-0.309016,-0.275637,-0.241921,-0.207911,-0.173648,-0.139173,-0.104528,-0.069756,-0.034899, };typedef struct{   volatile struct EPWM_REGS *EPwmRegHandle;   Uint16 EPwm_CMPA_Direction;   Uint16 EPwm_CMPB_Direction;   Uint16 EPwmTimerIntCount;   Uint16 EPwmMaxCMPA;   Uint16 EPwmMinCMPA;   Uint16 EPwmMaxCMPB;   Uint16 EPwmMinCMPB;}EPWM_INFO;// Global variables used in this exampleEPWM_INFO epwm1_info;EPWM_INFO epwm2_info;EPWM_INFO epwm3_info;// Configure the period for each timer#define EPWM1_TIMER_TBPRD  1024 // Period register   0~2^16/*#define EPWM1_MAX_CMPA     8000#define EPWM1_MIN_CMPA       500#define EPWM1_MAX_CMPB     8000#define EPWM1_MIN_CMPB       500#define EPWM2_TIMER_TBPRD  2000  // Period register#define EPWM2_MAX_CMPA     1950#define EPWM2_MIN_CMPA       50#define EPWM2_MAX_CMPB     1950#define EPWM2_MIN_CMPB       50#define EPWM3_TIMER_TBPRD  2000  // Period register#define EPWM3_MAX_CMPA     1950#define EPWM3_MIN_CMPA       50#define EPWM3_MAX_CMPB     1950#define EPWM3_MIN_CMPB       50*/#define EPWM_CMP_UP   1#define EPWM_CMP_DOWN 0void  InitEPWM1(void);interrupt void epwm1_isr(void);interrupt void epwm2_isr(void);interrupt void epwm3_isr(void);void update_compare(EPWM_INFO*);void main(void){ InitSysCtrl();        //系统时钟初始化 InitXintf16Gpio();    //外设端口初始化   16位数据线 20位地址线      DINT;      InitPieCtrl();       //PIE 控制寄存器初始化      IER = 0x0000;        //关中断      IFR = 0x0000;        //清除中断标志      InitPieVectTable();  //初始化pie映射向量表      EALLOW;  // This is needed to write to EALLOW protected registers      PieVectTable.EPWM1_INT = &epwm1_isr;//      PieVectTable.EPWM2_INT = &epwm2_isr;//      PieVectTable.EPWM3_INT = &epwm3_isr;      EDIS;    // This is needed to disable write to EALLOW protected registers      EALLOW;      SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0;      EDIS;      InitEPWM1();      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;      PieCtrlRegs.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      for(;;)      {          asm("          NOP");      }}interrupt void epwm1_isr(void){   // Update the CMPA and CMPB values   update_compare(&epwm1_info);   // 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;}interrupt void epwm2_isr(void){   // Update the CMPA and CMPB values   update_compare(&epwm2_info);   // Clear INT flag for this timer   EPwm2Regs.ETCLR.bit.INT = 1;   // Acknowledge this interrupt to receive more interrupts from group 3   PieCtrlRegs.PIEACK.all = PIEACK_GROUP3;}interrupt void epwm3_isr(void){   // Update the CMPA and CMPB values   update_compare(&epwm3_info);   // Clear INT flag for this timer   EPwm3Regs.ETCLR.bit.INT = 1;   // Acknowledge this interrupt to receive more interrupts from group 3   PieCtrlRegs.PIEACK.all = PIEACK_GROUP3;}   void  InitEPWM1(void){InitEPwm1Gpio();     // Setup TBCLK     EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP; // 时基计数器计数模式     EPwm1Regs.TBPRD = EPWM1_TIMER_TBPRD;       // 计数次数      T=TB*TBPRD     EPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE;    // Disable phase loading     EPwm1Regs.TBPHS.half.TBPHS = 0x0000;       // Phase is 0     EPwm1Regs.TBCTR = 0x0000;                  // Clear counter     EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV4;   // TB=1/SYSCLKOUT*[CLKDIV]*[HSPCLKDIV]     EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV2;     // Setup shadow register load on ZERO     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;     // Set Compare values    EPwm1Regs.CMPA.half.CMPA = 10;    // Set compare A value //    EPwm1Regs.CMPB = 1500;              // Set Compare B value     EPwm1Regs.AQCTLA.bit.ZRO = AQ_SET;            // Set PWM1A on Zero     EPwm1Regs.AQCTLA.bit.CAU = AQ_CLEAR;          // Clear PWM1A on event A, up count     EPwm1Regs.AQCTLB.bit.ZRO = AQ_SET;            // Set PWM1B on Zero     EPwm1Regs.AQCTLB.bit.CBU = AQ_CLEAR;          // Clear PWM1B on event B, up countEPwm1Regs.DBCTL.all=0xb;          // EPWMxB is invertedEPwm1Regs.DBRED=70;             //CHANNEL EPWMA   0~1023 (死区时间>momsfet上升时间+驱动上升时间+分布电容)EPwm1Regs.DBFED=50;                //CHANNEL EPWMB   0~1023EPwm1Regs.TZSEL.all=0;EPwm1Regs.TZCTL.all=0;EPwm1Regs.TZEINT.all=0;EPwm1Regs.TZFLG.all=0;EPwm1Regs.TZCLR.all=0;EPwm1Regs.TZFRC.all=0;// Interrupt where we will change the Compare ValuesEPwm1Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO;     // Select INT on Zero event   EPwm1Regs.ETSEL.bit.INTEN = 1;                // Enable INT   EPwm1Regs.ETPS.bit.INTPRD = ET_2ND;           // Generate INT on 2rd event   epwm1_info.EPwm_CMPA_Direction = EPWM_CMP_UP; // Start by increasing CMPA & CMPB   epwm1_info.EPwm_CMPB_Direction = EPWM_CMP_UP;   epwm1_info.EPwmTimerIntCount = 0;             // Zero the interrupt counter   epwm1_info.EPwmRegHandle = &EPwm1Regs;        // Set the pointer to the ePWM module/*    epwm1_info.EPwmMaxCMPA = EPWM1_MAX_CMPA;      // Setup min/max CMPA/CMPB values   epwm1_info.EPwmMinCMPA = EPWM1_MIN_CMPA;   epwm1_info.EPwmMaxCMPB = EPWM1_MAX_CMPB;   epwm1_info.EPwmMinCMPB = EPWM1_MIN_CMPB;*/}   void update_compare(EPWM_INFO *epwm_info)   {     unsigned int temp;      // Every 10'th interrupt, change the CMPA/CMPB values      if(epwm_info->EPwmTimerIntCount < 179)      {     epwm_info->EPwmTimerIntCount++;      }      else      {     epwm_info->EPwmTimerIntCount = 0;      }      temp=(EPWM1_TIMER_TBPRD)*(0.85*(sin_180[epwm_info->EPwmTimerIntCount]+sin_180[epwm_info->EPwmTimerIntCount+1])*0.25+0.5);//      if(temp>=0.95*EPWM1_TIMER_TBPRD)//      temp=0.98*EPWM1_TIMER_TBPRD; //     else //         if(temp<=0.05*EPWM1_TIMER_TBPRD) //    temp=0.02*EPWM1_TIMER_TBPRD;      EPwm1Regs.CMPA.half.CMPA = temp;      return;   }

看着比较复杂 其实就是180个占空比 循环给   哦对 要确定自己的开关频率 来通过开关几次给下一个就行了 再就是自然采样法、标准采样法要看看 

sin_180[]里面的点怎么算的？