F28035高精度PWM使用问题，请帮忙看一下，谢谢

user6532300

想通过高精度PWM改变移相角，但是实验发现给小数的时候无法识别，依然按照整数来处理，（给整数可以移相，比如100到101，给小数不可以，比如100到100.5）代码如下

初始化

void InitEPwm2Example()                //滞后臂
{
    //
    // Setup TBCLK
    //
    EALLOW;
    EPwm2Regs.TBPRD = period1;       // Set timer period
    EPwm2Regs.TBPHS.half.TBPHS = PHS;       // Phase is 0
    EPwm2Regs.TBPHS.half.TBPHSHR = 0;       // Phase is 0
    EPwm2Regs.CMPA.half.CMPA=272;

    EPwm2Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP; // Count up
    EPwm2Regs.TBCTL.bit.PHSEN = TB_ENABLE;
    EPwm2Regs.TBCTL.bit.PRDLD = TB_SHADOW;
    EPwm2Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_IN;

    EPwm2Regs.TBCTR = 0x0000;                  // Clear counter
    EPwm2Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;   // Clock ratio to SYSCLKOUT
    EPwm2Regs.TBCTL.bit.CLKDIV = TB_DIV1;

    EPwm2Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
    EPwm2Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
    EPwm2Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
    EPwm2Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;

//    EPwm2Regs.AQCTLB.bit.CAU = AQ_CLEAR;
//    EPwm2Regs.AQCTLB.bit.PRD = AQ_SET;
    EPwm2Regs.AQCTLB.bit.CAU = AQ_NO_ACTION;
    EPwm2Regs.AQCTLB.bit.PRD = AQ_NO_ACTION;

    EPwm2Regs.DBCTL.bit.IN_MODE = 3;
    EPwm2Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE;
//    EPwm2Regs.DBCTL.bit.POLSEL = DB_ACTV_HIC;
    EPwm2Regs.DBFED = db;                //死区300ns
    EPwm2Regs.DBRED = db;

    EPwm2Regs.HRCNFG.all = 0x0;
    EPwm2Regs.HRCNFG.bit.EDGMODE = HR_BEP;       // MEP control on falling edge
    EPwm2Regs.HRCNFG.bit.CTLMODE = HR_PHS;
    EPwm2Regs.HRCNFG.bit.HRLOAD = HR_CTR_ZERO;

    EPwm2Regs.HRCNFG.bit.SWAPAB=0;
    EPwm2Regs.HRCNFG.bit.SELOUTB=0;
    EPwm2Regs.HRCNFG.bit.AUTOCONV = 0;
    EPwm2Regs.HRPCTL.bit.HRPE = 1;
    EPwm2Regs.HRPCTL.bit.TBPHSHRLOADE = 1;
    EDIS;

}

应用代码：

PID_Value.pidvalue = 100.5;
EPwm2Regs.TBPHS.half.TBPHS = (Uint16) PID_Value.pidvalue;
EPwm2Regs.TBPHS.half.TBPHSHR = (Uint16) ( (PID_Value.pidvalue - EPwm2Regs.TBPHS.half.TBPHS)*93+0.5) <<8;

4 年多前