feature request - Servo control

[rhubarbdog]

Hi, I'm getting into robots for the microbit. One popular solution is to use continuous servos to control wheels and standard angular servos for robot arms. I have written a servo class which is now an 870 byte python script. There's then the robot class and finally the program. The problem is i'm out of memory and the robot i have has additional sensors and features which can be bought. My robot is a white elephant from a micropython point of view.

Microsoft blocks has a write_servo block which has 2 parameters a pin and an angle between 0 and 180. Lancaster university's microbit.h for c++ programming has a setServoValue and a setServoPulseUs method for pins.

Microsoft blocks and Lancaster university's c++ header have different ideas about what if any circuitry is required. Blocks uses direct wiring to microbit or a circuit equivalent to where as Lancaster university has an inverted logic and a servo must be connected to a microbit as follows

What's the implications of adding the the following: pinX.write_servo() pinX.configure_servo()

I believe that both Microsoft Blocks and Lancaster University are correct in there circuit requirement. I have the need for Microsoft logic but implementing both isn't rocket science.

[deshipu]

All you need to control a servo is this:

pin.set_analog_period(20)
pin.write_analog(int(25 + 100 * degrees / 180))

There is no need for dedicated methods or libraries.

You don't need special circuits for the servos — the signal pin can be connected directly to the microbit pin.

[rhubarbdog]

thanks that works, i've tweaked the values in the write_anaolg(int(25 + 85 * degrees / 180)) it gave a better response to the input ange