Here you can see how to control pwm pins at boot: soldering pull downs (such as 10K to 100K). In fact, leaving PWM1/PWM2 unconnected the motors rotated at full speed for ever after power on, corresponding to open=high.
Here you can see how to control pwm pins at boot: soldering pull downs (such as 10K to 100K). In fact, leaving PWM1/PWM2 unconnected the motors rotated at full speed for ever after power on, corresponding to open=high.