TMS320F28035: 请问如何让epwm1a和epwm1b输出相同的波形但是epwm1b的波形向右偏移半个周期

//************************************************************************************************

#include "DSP28x_Project.h"     // Device Headerfile and Examples Include File

#define SYSCLK 60E6 // 60MHz system clock
#define PWMFREQ 100E3 // 100kHz PWM frequency
#define DUTY_CYCLE 0.4// duty cycle
#define DEAD_BAND 0.2 // dead band

//#define TB_PERIOD (SYSCLK / (2 * PWMFREQ)) // Calculate period for up-down count mode
//#define TB_PERIOD (SYSCLK / PWMFREQ) // Calculate period for up-down count mode
#define TB_PERIOD (SYSCLK / (4 * PWMFREQ)) // Calculate period for up-down count mode

#define DUTY_VALUE (TB_PERIOD * DUTY_CYCLE)
#define DB_VALUE (TB_PERIOD * DEAD_BAND)

// 函数声明

void SetGpio()
{
    EALLOW;

    GpioCtrlRegs.GPAMUX1.bit.GPIO0 = 1; // Configure GPIO0 as EPWM1A
    GpioCtrlRegs.GPADIR.bit.GPIO0 = 1; //Set as output

    GpioCtrlRegs.GPAMUX1.bit.GPIO1 = 1; // Configure GPIO1 as EPWM1B
    GpioCtrlRegs.GPADIR.bit.GPIO1 = 1; //Set as output

    EDIS;
}

void InitEPWM1(void)
{
    EPwm1Regs.TBPRD = TB_PERIOD;  // 设置周期

    EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN;  // 设置上下计数模式

    EPwm1Regs.CMPA.half.CMPA = DUTY_VALUE;  // 设置 ePWM1A 的占空比
    EPwm1Regs.CMPB = DUTY_VALUE;  // 设置 ePWM1B 的占空比

    EPwm1Regs.AQCTLA.bit.CAU = AQ_CLEAR;  // 设置 ePWM1A 在计数器向上计数时设置为高电平
    EPwm1Regs.AQCTLA.bit.CAD = AQ_SET;  // 设置 ePWM1A 在计数器向下计数时设置为低电平

//    EPwm1Regs.AQCTLB.bit.CBU = AQ_CLEAR;  // 设置 ePWM1B 在计数器向上计数时设置为低电平
//    EPwm1Regs.AQCTLB.bit.CBD = AQ_SET;  // 设置 ePWM1B 在计数器向下计数时设置为高电平
    EPwm1Regs.AQCTLB.bit.CBU = AQ_CLEAR;  // 设置 ePWM1B 在计数器向上计数时设置为低电平
    EPwm1Regs.AQCTLB.bit.CBD = AQ_SET;  // 设置 ePWM1B 在计数器向下计数时设置为高电平

    EPwm1Regs.DBCTL.bit.IN_MODE = DBA_ALL;  // 设置死区输入模式
    EPwm1Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE;  // 设置死区输出模式
    EPwm1Regs.DBCTL.bit.POLSEL = DB_ACTV_HIC;        //=DB_ACTV_HIC(DB_ACTV_HI,DB_ACTV_LOC,DB_ACTV_HIC,DB_ACTV_LO)
    EPwm1Regs.DBRED = DB_VALUE;  // 设置死区上升沿延迟
    EPwm1Regs.DBFED = DB_VALUE;  // 设置死区下降沿延迟

    EPwm1Regs.TBCTL.bit.PHSEN = TB_ENABLE;  // 启用相位加载
    EPwm1Regs.TBPHS.half.TBPHS = EPwm1Regs.TBPRD / 2;  // 设置 ePWM1B 的相位偏移

     SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1
}

void main(void)
{
    InitSysCtrl();  // 初始化系统时钟和PLL

    DINT;   // 禁止所有中断

    InitPieCtrl();  // 初始化和启用CPU PIE

    IER = 0x0000;
    IFR = 0x0000;

    InitPieVectTable();  // 初始化PIE向量表

    SetGpio(); // Initialize GPIO

    EALLOW;
    SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0;  // 停止所有ePWM时钟
    EDIS;

    InitEPWM1();  // 初始化ePWM1

    EALLOW;
    SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1;  // 启动所有ePWM时钟
    EDIS;

    for(;;)
    {
        // 主循环
    }
}

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