PWM配置为UP时向上计数无波形输出

TI大牛帮忙看一下原因吧？？跪求

EPwm7Regs.AQCTLB.bit.CAU = AQ_CLEAR; // Clear PWM1B on CAU
EPwm7Regs.AQCTLB.bit.CAD = AQ_SET; // Set PWM1B on CAD


应该是这两句，如果是UPDOWN的话有CAD，但如果只是UP的话只有CAU但不存在CAD，所以要加入ZERO或者PERIOD时的动作配置。                                                                          TI 程序猿

您好 Igor An
已经按你说的更改了但是还无法观察到波形。

PWM IO初始化
void InitEPwm7Gpio(void)
[
   EALLOW;
/* Disable internal pull-up for the selected output pins
   for reduced power consumption */
// Pull-ups can be enabled or disabled by the user.
// This will enable the pullups for the specified pins.
// Comment out other unwanted lines.

  GpioCtrlRegs.GPAPUD.bit.GPIO30 = 1;           // Disable pull-up on GPIO30 (EPWM7A)
//    GpioCtrlRegs.GPBPUD.bit.GPIO40 = 1;    // Disable pull-up on GPIO40 (EPWM7A)
//  GpioCtrlRegs.GPBPUD.bit.GPIO58 = 1;           // Disable pull-up on GPIO58 (EPWM7A)

//    GpioCtrlRegs.GPBPUD.bit.GPIO41 = 1;    // Disable pull-up on GPIO41 (EPWM7B)
//  GpioCtrlRegs.GPBPUD.bit.GPIO44 = 1;           // Disable pull-up on GPIO44 (EPWM7B)

/* Configure EPWM-7 pins using GPIO regs*/
// This specifies which of the possible GPIO pins will be EPWM7 functional pins.
// Comment out other unwanted lines.

  GpioCtrlRegs.GPAMUX2.bit.GPIO30 = 3;   // Configure GPIO30 as EPWM7A
//    GpioCtrlRegs.GPBMUX1.bit.GPIO40 = 1;   // Configure GPIO40 as EPWM7A
//  GpioCtrlRegs.GPBMUX2.bit.GPIO58 = 3;   // Configure GPIO58 as EPWM7A

//    GpioCtrlRegs.GPBMUX1.bit.GPIO41 = 1;   // Configure GPIO41 as EPWM7B
//  GpioCtrlRegs.GPBMUX1.bit.GPIO44 = 3;   // Configure GPIO44 as EPWM7B

    EDIS;
]


PWm初始化更改为
void InitEPwm7Example()
[

   EPwm7Regs.TBPRD = 1000;                        // Set timer period   6000  408
   EPwm7Regs.TBPHS.half.TBPHS = 0x0000;           // Phase is 0
   EPwm7Regs.TBCTR = 0x0000;                      // Clear counter

   // Setup TBCLK
   EPwm7Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP; // Count up
   EPwm7Regs.TBCTL.bit.PHSEN = TB_DISABLE;        // Disable phase loading
   EPwm7Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;       // Clock ratio to SYSCLKOUT
   EPwm7Regs.TBCTL.bit.CLKDIV = TB_DIV1;          // TB_DIV4 = 0x02
   EPwm7Regs.TBCTL.bit.PRDLD = TB_SHADOW;
   EPwm7Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_IN;
   EPwm7Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;    // Load registers every ZERO
//   EPwm7Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
   EPwm7Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
//   EPwm7Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;

   // Setup compare
   EPwm7Regs.CMPA.half.CMPA = 500;                //3000

   // Set actions
//   EPwm7Regs.AQCTLA.bit.CAU = AQ_SET;             // Set PWM1A on CAU
   EPwm7Regs.AQCTLA.bit.CAD = AQ_SET;           // Clear PWM1A on CAD
   EPwm7Regs.AQCTLA.bit.ZRO = AQ_CLEAR;

//  EPwm7Regs.AQCTLB.bit.CAU = AQ_CLEAR;           // Clear PWM1B on CAU
//   EPwm7Regs.AQCTLB.bit.CAD = AQ_SET;             // Set PWM1B on CAD

   // Active Low PWMs - Setup Deadband
//   EPwm1Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE;
//   EPwm1Regs.DBCTL.bit.POLSEL = DB_ACTV_HIC;
//   EPwm1Regs.DBCTL.bit.IN_MODE = DBA_ALL;
//   EPwm1Regs.DBRED = EPWM1_MIN_DB;
//   EPwm1Regs.DBFED = EPWM1_MIN_DB;
//   EPwm1_DB_Direction = DB_UP;

   // Interrupt where we will change the Deadband
   EPwm7Regs.ETSEL.bit.INTSEL = ET_CTRU_CMPA;     // Select INT on Zero event
   EPwm7Regs.ETSEL.bit.INTEN = 1;                // Enable INT
   EPwm7Regs.ETPS.bit.INTPRD = ET_1ST;           // Generate INT on 3rd event




//     EPwm1Regs.ETSEL.bit.SOCAEN   = 1;        // Enable SOC on A group
//     EPwm1Regs.ETSEL.bit.SOCASEL  = 3;        // Select SOC from CMPA on upcount
//     EPwm1Regs.ETPS.bit.SOCAPRD   = 1;        // Generate pulse on 1st event
]
还是无法输出波形？这个是啥原因造成的呢？

已经解决了，谢谢你的回复

我想问一下，现在设置的PWM是向上计数的，中断配置如下
EPwm7Regs.ETSEL.bit.INTSEL = ET_CTRU_CMPA;     // Select INT on Zero event
   EPwm7Regs.ETSEL.bit.INTEN = 1;                // Enable INT
   EPwm7Regs.ETPS.bit.INTPRD = ET_1ST;           // Generate INT on 3rd event

中断里面有一个IO翻转，但是测得IO频率是PWM频率的一半，这个是什么原因造成的呢？？？