Question

我想将dsPIC33EP32MC204微控制器用于电机控制应用。但是，即使我遵循了用户手册和系列参考手册，也无法使高速PWM工作（PWM2H引脚上没有PWM脉冲）。这是我的代码：

void Init_PWM(void)
{
    PTCONbits.PTEN = 0;  //PWM module is disabled
    PTCONbits.PTSIDL = 0;  // PWMx time base runs in CPU Idle mode

    PWMCON2bits.FLTIEN = 0;     // Fault interrupt is disabled and the FLTSTAT bit is cleared
    PWMCON2bits.ITB = 0;        // PTPER register provides timing for this PWM generator
    PWMCON2bits.MDCS = 0;       // PDCx register provides duty cycle information for this PWM generator
    PWMCON2bits.MTBS = 0;       // PWM generator uses the primary master time base for synchronization and as the clock source
    PWMCON2bits.IUE = 0;        // Updates to the active PDCx registers are synchronized to the PWMx period boundary
    PTCON2bits.PCLKDIV = 0b000; // PWM Input Clock Prescaler 
    PWMCON2bits.CAM = 0;        // Edge Aligned PWM
    PWMCON2bits.DTC = 0b10;     // Dead time function is disabled

    IOCON2bits.PENH = 1;        // PWMx module controls PWMxH pin
    IOCON2bits.POLH = 0;        //  PWMxH pin is active-high
    IOCON2bits.OVRENH = 0;      // PWMx generator controls PWMxH pin
    IOCON2bits.PMOD = 0b01;     // PWM I/O pin pair is in Redundant Output mode

    PHASE2 = 0;                 // No Phase Shift
    PTPER = 0x4E20;             // Period register 

    PTCONbits.PTEN = 1;         //PWM module is enabled
}

main（）函数中的相关代码：

TRISBbits.TRISB12 = 0;

Init_PWM();   
PDC2 = 0x2710; //Duty Cycle

如果有人能告诉我为什么完成附加的配置后为什么看不到任何PWM脉冲，我将不胜感激。我究竟做错了什么？谢谢！

高速PWM模块的问题

0 个答案: