TMS320F28P550SJ9学习笔记14：EPWM_死区dead_baund

今日更改配置EPWM1的GPIO 0和GPIO 1可调节死区：

文章提供完整工程下载、测试效果图

目录

EPWM1初始化带死区：

主函数调用：

测试效果截图：

完整工程下载：

我的单片机平台是这个：

EPWM1初始化带死区：

cpp 复制代码

Uint16 EPwm1_DB_Direction;

//EPWM_INFO epwm3_info;

// 向上向下计数 周期 = TBCLK / （TBCRD*2）
// 本初始化最终算得周期为 50kHz
void Init_Epwm1(void)//GPIO 0   GPIO 1
{
    EALLOW;
      CpuSysRegs.PCLKCR2.bit.EPWM1=1;  //使能EPWM1
      PieVectTable.EPWM1_TZ_INT = &epwm1_tzint_isr;
      //初始化EPWM引脚
      GpioCtrlRegs.GPAPUD.bit.GPIO0 = 1;    // Disable pull-up on GPIO0 (EPWM1A)
      GpioCtrlRegs.GPAMUX1.bit.GPIO0 = 1;   // Configure GPIO0 as EPWM1A
      GpioCtrlRegs.GPAPUD.bit.GPIO1 = 1;    // Disable pull-up on GPIO1 (EPWM2A)
      GpioCtrlRegs.GPAMUX1.bit.GPIO1 = 1;   // Configure GPIO1 as EPWM1B
    EDIS;

    EALLOW;
      CpuSysRegs.PCLKCR0.bit.TBCLKSYNC =0;
    EDIS;

//    EALLOW;
//    //选择触发器 功能
//      EPwm1Regs.TZSEL.bit.OSHT1 = 1;
//      // Set TZA 当触发器条件满足时相关的输出强制为高电平
//      EPwm1Regs.TZCTL.bit.TZA = TZ_FORCE_HI;
//
//      // Enable TZ interrupt
//      EPwm1Regs.TZEINT.bit.OST = 1;
//    EDIS;

    EPwm1Regs.TBPRD = 6000;                       // Set timer period
    EPwm1Regs.TBPHS.bit.TBPHS = 0x0000;           // Phase is 0
    EPwm1Regs.TBCTR = 0x0000;                     // Clear counter

    //
    // Setup TBCLK
    //
    EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN; // Count up
    EPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE;        // Disable phase loading
    EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV4;       // Clock ratio to SYSCLKOUT
    EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV4;

    EPwm1Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;    // Load registers every ZERO
    EPwm1Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
    EPwm1Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
    EPwm1Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;

    //
    // Setup compare
    //
    EPwm1Regs.CMPA.bit.CMPA = 3000;

    //
    // Set actions
    //
    EPwm1Regs.AQCTLA.bit.CAU = AQ_SET;            // Set PWM1A on Zero
    EPwm1Regs.AQCTLA.bit.CAD = AQ_CLEAR;

    EPwm1Regs.AQCTLB.bit.CAU = AQ_CLEAR;          // Set PWM1A on Zero
    EPwm1Regs.AQCTLB.bit.CAD = AQ_SET;

    //
    // Active Low PWMs - Setup Deadband
    //
    EPwm1Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE;
    EPwm1Regs.DBCTL.bit.POLSEL = DB_ACTV_LO;
    EPwm1Regs.DBCTL.bit.IN_MODE = DBA_ALL;
    EPwm1Regs.DBRED.bit.DBRED = 0;
    EPwm1Regs.DBFED.bit.DBFED = 0;
    EPwm1_DB_Direction = 1;

    //
    // Interrupt where we will change the Deadband
    //
    EPwm1Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO;    // Select INT on Zero event
    EPwm1Regs.ETSEL.bit.INTEN = 1;               // Enable INT
    EPwm1Regs.ETPS.bit.INTPRD = ET_3RD;          // Generate INT on 3rd event




    EALLOW;
      CpuSysRegs.PCLKCR0.bit.TBCLKSYNC =1;
    EDIS;
      IER |= M_INT2;
      PieCtrlRegs.PIEIER2.bit.INTx1 = 1;
}

主函数调用：

测试效果截图：

这幅图是同时设置超前与滞后死区：

这里可以看到只有设定DBFED 时是滞后带死区：

完整工程下载：

https://download.csdn.net/download/qq_64257614/90595942