dsp中断运行26步就不再进入

[weixin_40392925]

如图，就是一个f28335的epwm程序，初始化和中断检查过好几次了，没有问题，可是每次运行，计数的xA到26就不再进入中断，其他几路PWM也是这样，即使把其他几路pwm和ADC程序都删了，只留pwm1，也是这样，网上查了也没有查到类似问题的解决方法~跪求解惑

pwm初始化程序void Init_EPwm1(void)
{
EALLOW;
EPwm1Regs.TBPRD = SP; // Set timer period
EPwm1Regs.TBPHS.half.TBPHS = 0x0000; // Phase is 0
EPwm1Regs.TBCTR = 0x0000; // Clear counter

// Setup TBCTL
EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN; // Count up;
EPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE; // Disable phase loading
EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_CTR_ZERO; //设置在计数值为0 时输出同步信号
EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1; // ?Clock ratio to SYSCLKOUT
EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV1; //?

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.half.CMPA =DutyA;

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


EPwm1Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE; //2路PWM输出信号均由死区模块输出
EPwm1Regs.DBCTL.bit.POLSEL = DB_ACTV_LOC; //互补低电平有效 HIC为高电平有效
EPwm1Regs.DBCTL.bit.IN_MODE = DBA_ALL; //以EPWMXA信号为输入信号

EPwm1Regs.DBRED = Dead_time;
EPwm1Regs.DBFED = Dead_time;

EPwm1Regs.ETSEL.bit.INTSEL=2;
EPwm1Regs.ETSEL.bit.INTEN=1;
EPwm1Regs.ETPS.bit.INTPRD=1;
EPwm1Regs.ETCLR.bit.INT=1;
EDIS;
}