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TMS320F28388D: PWM周期问题

HE HE
Part Number: TMS320F28388D

你好，帮我看看，请问如下图配置，生成是pwm波的周期实测为什么是25K，而不是50k

还有个问题，pwm时钟频率是不是默认100MHZ？

  • 0
    TI__Guru** 101655 points

    试一下这么改：

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    EPWM_setTimeBasePeriod(myEPWM1_BASE, 4000);
    EPWM_setClockPrescaler(myEPWM1_BASE,
    EPWM_CLOCK_DIVIDER_2,
    EPWM_HSCLOCK_DIVIDER_2);
    XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

    PWM时钟复位的时候默认是100MHz。

  • +1 回复 Green Deng

    实测3.125k，能否帮我讲解下，3.125k是如何配置出来的？

    TBCLK = EPWMCLK/(highSpeedPrescaler * pre-scaler)

    按照这个公式，时基 = 100/(2*2) = 25 M

    周期 = 25M/4000 = 6.25k,为何实测是3.125k

  • +1 回复 HE HE

    在帮我看看