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am335x 的 ehrpwm设置pwm频率最大只能是250Hz吗?



/sys/devices/platform/omap/ehrpwm.0/pwm/ehrpwm.0:1]路径下

echo *** > period_freq

设置pwm的频率

最大只能是250Hz吗?我想设置1MHz,但只要设置数值大于250就都被截取为250?请问这是怎么回事呢?