C2000 28035 EPWM 波形的问题

有没使能PWM的时钟

还有如下：

// For this example, only initialize the ePWM
EALLOW;
SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0;
EDIS;

InitEPwm1Example();
InitEPwm2Example();
InitEPwm3Example();

EALLOW;
SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1;
EDIS;

建议用CONTROLsuite的例程去修改。

ERIC

初始化程序确实没有是能时钟，但是在主程序中有这一部分啊，这样不能吗？？？

void main(void)
{
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the DSP2803x_SysCtrl.c file.
InitSysCtrl();

// Step 2. Initalize GPIO:
// This example function is found in the DSP2803x_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
// InitGpio(); // Skipped for this example

// For this case just init GPIO pins for ePWM1, ePWM2, and TZ pins
InitEPwm1Gpio();
InitEPwm2Gpio();
InitTzGpio();

// Step 3. Clear all interrupts and initialize PIE vector table:
// Disable CPU interrupts
DINT;

// Initialize the PIE control registers to their default state.
// The default state is all PIE interrupts disabled and flags
// are cleared.
// This function is found in the DSP2803x_PieCtrl.c file.
InitPieCtrl();

// Disable CPU interrupts and clear all CPU interrupt flags:
IER = 0x0000;
IFR = 0x0000;

InitPieVectTable();

// Interrupts that are used in this example are re-mapped to
// ISR functions found within this file.
EALLOW; // This is needed to write to EALLOW protected registers
PieVectTable.EPWM1_TZINT = &epwm1_tzint_isr;
PieVectTable.EPWM2_TZINT = &epwm2_tzint_isr;
EDIS; // This is needed to disable write to EALLOW protected registers

// Step 4. Initialize all the Device Peripherals:
// This function is found in DSP2803x_InitPeripherals.c
// InitPeripherals(); // Not required for this example

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

InitEPwm1Example();
InitEPwm2Example();

EALLOW;
SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1;
EDIS;

// Step 5. User specific code, enable interrupts
// Initalize counters:
EPwm1TZIntCount = 0;
EPwm2TZIntCount = 0;

// Enable CPU INT3 which is connected to EPWM1-3 INT:
IER |= M_INT2;

// Enable EPWM INTn in the PIE: Group 2 interrupt 1-3
PieCtrlRegs.PIEIER2.bit.INTx1 = 1;
PieCtrlRegs.PIEIER2.bit.INTx2 = 1;

// Enable global Interrupts and higher priority real-time debug events:
EINT; // Enable Global interrupt INTM
ERTM; // Enable Global realtime interrupt DBGM

// Step 6. IDLE loop. Just sit and loop forever (optional):
for(;;)
{
asm(" NOP");
}

}

没看你的程序，你看一下wpwm1a没有波形，但是epwm1b是不是高电平？如果是，初始化没问题

是高电平，但是为什么没有波形

那就说明已经配置好了，但是你没有给他比较值，让它输出PWM。。。

for(;;)
{
EPwm1Regs.CMPA.half.CMPA = 500（这个数根据你的计数器数到的最高点来算的，假如你计数器值1000，给cmp500就有50%的PWM输出，给300就有60的%波形输出。）; 
EPwm1Regs.CMPB = 500; 
}

你在配置好pwm后，加上这句，就有pwm波形了。。。没时间细说，你可以查下CMP寄存器

你百度一下PPT ‘TMS320F28027课件_第七讲_ePWM’，这个比表详细