分享一个DSP28335的SVPWM程序源码，可供参考
单片机源程序如下:
- //***************************************************/
- //文件名：SVPWM.c
- //功能：调用28335内部PWM模块生成SVPWM输出测试文件
- //说明：输入信息采用结构体，使用时改变结构体指针即可改变输入信号。
- // InitSvpwm（）函数提供PWM模块初始化以及相应PIE中断的配置。
- // 通过park逆变换得到静止平面坐标系下的电压信号。
- // 在PWM定时器下溢中断中更新比较器的值，即每个PWM周期更新一次
- //****************************************************/
- #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; // 静止平面坐标系下电压信号
- float qs;
- float ang; // 电气角度 电气角度=机械角度*极对数
- float de; // 旋转坐标系下电压信号
- float qe;
- }IPARK;
- IPARK ipark1={0,0,0,0.3,0.4};
- // IPARK *v=&ipark1; //改变此处结构体指针改变输入
- 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;
-
- InitPieVectTable();
- MemCopy(&RamfuncsLoadStart, &RamfuncsLoadEnd, &RamfuncsRunStart); //Flash operation<F28335.cmd>
- 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) // 判断属于哪个扇区
- sector=1; // Va>0 则 a=1；否则a=0
- if(Vb>0.0000001) //
- sector=sector+2; // Vb>0 则 b=1；否则b=0
- if(Vc>0.0000001) //
- sector=sector+4; // Vc>0 则 c=1; 否则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 对应扇区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 对应扇区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 对应扇区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 对应扇区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 对应扇区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 对应扇区V
- t1=-Vb;
- t2=-Vc;
- Tc=(0.25)*(1-t1-t2);
- Ta=Tc+(0.5)*t1;
- Tb=Ta+(0.5)*t2;
- break;
- default: //sector=0和sector=7时错误
- Ta=0.5;
- Tb=0.5;
- Tc=0.5;
- }
- tmr1=Ta*PRD;
- tmr2=Tb*PRD;
- tmr3=Tc*PRD;
- }
- void InitEPwm1()
- {
- // 配置时钟
- EPwm1Regs.TBCTL.bit.CTRMODE = 0x2; // 增减计数模式
- EPwm1Regs.TBPRD = PRD; // 设置周期
- EPwm1Regs.TBCTL.bit.PHSEN = 0x0; // 禁用相位加载同步
- EPwm1Regs.TBPHS.half.TBPHS = 0x0000; // 相位初值
- EPwm1Regs.TBCTR = 0x0000; // 计数初值
- EPwm1Regs.TBCTL.bit.HSPCLKDIV = 0x1; // TBCLK = SYSCLKOUT / (HSPCLKDIV × CLKDIV)
- EPwm1Regs.TBCTL.bit.CLKDIV = 0x1;
- // 配置比较寄存器
- EPwm1Regs.CMPCTL.bit.SHDWAMODE = 0x0; //使用阴影寄存器
- EPwm1Regs.CMPCTL.bit.SHDWBMODE = 0x0;
- EPwm1Regs.CMPCTL.bit.LOADAMODE = 0x0; //计数器值为0时更新比较器值
- EPwm1Regs.CMPCTL.bit.LOADBMODE = 0x0;
- // 设置比较器初值
- EPwm1Regs.CMPA.half.CMPA = 1875;
- EPwm1Regs.CMPB = 1875;
- // 模式设定
- EPwm1Regs.AQCTLA.bit.ZRO = 0x1; // 等于0时输出低
- EPwm1Regs.AQCTLA.bit.CAU = 0x3; // 计数值=比较值时输出取反
- EPwm1Regs.AQCTLB.bit.ZRO = 0x2; // 等于0时输出高
- EPwm1Regs.AQCTLB.bit.CBU = 0x3; // 计数值=比较值时输出取反
- // 配置中断
- EPwm1Regs.ETSEL.bit.INTSEL = 0x1; // 计数值到0触发事件
- EPwm1Regs.ETSEL.bit.INTEN = 1; // 使能中断
- EPwm1Regs.ETPS.bit.INTPRD = 0x1; // 每次事件发生都触发中断
- }
- 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.CLKDIV = 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.AQCTLA.bit.ZRO = 0x1;
- EPwm2Regs.AQCTLA.bit.CAU = 0x3;
- EPwm2Regs.AQCTLB.bit.ZRO = 0x2;
- EPwm2Regs.AQCTLB.bit.CBU = 0x3;
- EPwm2Regs.ETSEL.bit.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;
- ……………………
- …………限于本文篇幅 余下代码请从51黑下载附件…………
所有资料51hei提供下载:
21840266SVPWM.rar
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