TMS320F28xx 88

洪嵐峰

TMS320F28xx 88太陽能逆變器的程式碼，這個程式碼是一個基本的參考，需要根據具體的硬件設置進行修改：


#include <stdint.h>
#include "DSP28x_Project.h"

#define PWM_FREQUENCY 1000

#define EPWM1_TIMER_TBPRD 1875 // PWM period, 75MHz / 1875 = 40kHz
#define EPWM1_TIMER_CMPA 937 // 50% duty cycle
#define EPWM1_TIMER_CMPB 1875 // 100% duty cycle

void main(void)
{
    InitSysCtrl();

    InitPieCtrl();

    IER = 0x0000;
    IFR = 0x0000;

    InitPieVectTable();

    EALLOW;
    PieVectTable.EPWM1_INT = &epwm1_isr;
    EDIS;

    InitEPwm();

    IER |= M_INT3;
    EINT;

    ERTM;

    while(1);
}

interrupt void epwm1_isr(void)
{
    EPwm1Regs.ETCLR.bit.INT = 1;
}

void InitEPwm()
{
    EALLOW;

    CpuSysRegs.PCLKCR0.bit.TBCLKSYNC = 0;
    CpuSysRegs.PCLKCR0.bit.GTBCLKSYNC = 0;

    EPwm1Regs.TBCTL.bit.CTRMODE = 0x3;
    EPwm1Regs.TBCTL.bit.SYNCOSEL = 0x2;

    EPwm1Regs.TBPRD = EPWM1_TIMER_TBPRD;
    EPwm1Regs.TBPHS.half.TBPHS = 0x0000;

    EPwm1Regs.CMPA.half.CMPA = EPWM1_TIMER_CMPA;
    EPwm1Regs.CMPB = EPWM1_TIMER_CMPB;

    EPwm1Regs.TBCTL.bit.PHSEN = 0x0;
    EPwm1Regs.TBCTL.bit.PRDLD = 0x1;

    EPwm1Regs.TBCTR = 0x0000;
    EPwm1Regs.TBCTL.bit.HSPCLKDIV = 0x0;
    EPwm1Regs.TBCTL.bit.CLKDIV = 0x0;

    EPwm1Regs.AQCTLA.bit.CAU = 0x2;
    EPwm1Regs.AQCTLA.bit.CAD = 0x1;
    EPwm1Regs.AQCTLB.bit.ZRO = 0x2;
    EPwm1Regs.AQCTLB.bit.PRD = 0x1;

    EPwm1Regs.ETSEL.bit.INTSEL = 0x1;
    EPwm1Regs.ETSEL.bit.INTEN = 0x1;
    EPwm1Regs.ETPS.bit.INTPRD = 0x1;

    CpuSysRegs.PCLKCR0.bit.TBCLKSYNC = 1;
    CpuSysRegs.PCLKCR0.bit.GTBCLKSYNC = 1;

    EDIS;
}
需要注意的是，此代碼僅包含基本的PWM控制，需要根據具體的太陽能逆變器的硬件設置進行修改。