PWM占空比成反比

Namaste，我正在研究带有DSPIC30F4011i的PWM问题，因为当我增加PDC占空比的值降低时，请发现波形第一波形是PWM1H（PDC1＝1999）和第二个PWM2H（PDC2＝19999）。根据我的理解，应该是相反的，请解释为什么？…程序…使用主（空）{TrISE＝0x00；和/或确保PWM引脚被设置为输出端口＝0x00；/ /清除输出PTCONBITS.PPES＝1；/PWM PWM定时器规模比例PTCONPS.PTCKPS＝0；//PWM定时器预刻度PTCONPTS.PTMOD＝2；//PWM工作在上下模式连续PTMR＝0；//P。WM计数器值，开始于0 PTP= 19999；//PWM时基周期PWMCON1比特。PMOD3＝0；//PWM在互补模式PWMCON1BIT.PMOD2＝0；//PWM在互补模式PWMCON1BIT.PMOD1＝0；//PWM在互补模式PWMCON1BITS PN3H＝1；//PWM高引脚启用PWMCON1BITS PN2H＝1；//P；WM高PIN启用PWMCON1BITS PUN1H＝1；//PWM高PIN启用PWMCON1BITS PEN3L＝1；//启用PWM Low pin（方向控制？）PWMCON1比特？PN2L＝1；/ / PWM Low pin启用（方向控制？）PWMCON1比特？PUN1L＝1；/ / PWM Low pin启用（方向控制？）DTCON1BITS DTAPs＝0；//死区预缩放器DTCON1BITS DTA＝59；/死区时间值为4 U.PDC1＝1999；//PWM×1占空比寄存器（11位）PDC2＝19999；/PWM PWM 2占空比寄存器（11位）PDC3＝30000；/PWM PWM占线占空比寄存器（11位）PTCONBITS.PTEN＝1；/ /启用PWM定时库！（1）{}
                    
                    
               
                                                                                      以下为原文

                                                                            Namaste,

I am working on pwm with DSPIC30f4011

My problem is that as i increase the value of PDC duty cycle reduces.

Please find the waveform first waveform is of PWM1H(PDC1=1999) and second of PWM2H(PDC2=19999).

As per my understanding it should be opposite, kindly explain why?

........
Program used

int main(void)
{
TRISE = 0x00; // make sure PWM pins are set to be outputs
PORTE = 0x00; // clear the outputs

PTCONbits.PTOPS = 1; // PWM timer post-scale
PTCONbits.PTCKPS = 0; // PWM timer pre-scale
PTCONbits.PTMOD = 2; // PWM operates in Up-down Mode continuously
PTMR = 0; // PWM counter value, start at 0
PTPER = 19999; // PWM Timebase period
PWMCON1bits.PMOD3 = 0; // PWM in complimentary mode
PWMCON1bits.PMOD2 = 0; // PWM in complimentary mode
PWMCON1bits.PMOD1 = 0; // PWM in complimentary mode
PWMCON1bits.PEN3H = 1; // PWM High pin is enabled
PWMCON1bits.PEN2H = 1; // PWM High pin is enabled
PWMCON1bits.PEN1H = 1; // PWM High pin is enabled
PWMCON1bits.PEN3L = 1; // PWM Low pin enabled (direction control later?)
PWMCON1bits.PEN2L = 1; // PWM Low pin enabled (direction control later?)
PWMCON1bits.PEN1L = 1; // PWM Low pin enabled (direction control later?)
DTCON1bits.DTAPS = 0; //DeadTime pre-scaler
DTCON1bits.DTA = 59; //DeadTime value for 4 us.
PDC1 = 1999; // PWM#1 Duty Cycle register (11-bit)
PDC2 = 19999; // PWM#2 Duty Cycle register (11-bit)
PDC3 = 30000; // PWM#3 Duty Cycle register (11-bit)
PTCONbits.PTEN = 1; // Enable PWM Timerbase!

while(1)
{}
}

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