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标题: rk3288 PWM驱动配置正确，但波形图不是方波，求解 [打印本页]

作者: zg_muyuan 时间: 2020-7-13 17:32
标题: rk3288 PWM驱动配置正确，但波形图不是方波，求解
通过示波器量了PWM0的波形图，波形图不是方波，以下是pwm的信息，请问大牛问题出在哪里了?

firefly@firefly:~/Desktop$ cat /sys/kernel/debug/pwm
platform/ff680030.pwm, 1 PWM device
pwm-0 (pwm3             ): requested period: 0 ns duty: 0 ns polarity: inverse

platform/ff680020.pwm, 1 PWM device
pwm-0 (pwm2             ): requested period: 0 ns duty: 0 ns polarity: inverse

platform/ff680010.pwm, 1 PWM device
pwm-0 ((null)             ): period: 0 ns duty: 0 ns polarity: inverse

platform/ff680000.pwm, 1 PWM device
pwm-0 (pwm0             ): requested enabled period: 1000000 ns duty: 500000 ns polarity: inverse

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