first lib
Dependents: 17robo_fuzi 17robo_tokyo_kaede
Diff: servo.cpp
- Revision:
- 0:41758331f8d1
diff -r 000000000000 -r 41758331f8d1 servo.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/servo.cpp Sun Sep 24 06:19:24 2017 +0000 @@ -0,0 +1,65 @@ + +#include "servo.h" +#include "mbed.h" + +static float clamp(float value, float min, float max) { + if(value < min) { + return min; + } else if(value > max) { + return max; + } else { + return value; + } +} + +void Servo::setRange(float maxrange, float minrange){ + maxRange = maxrange; + minRange = minrange; +} + +void Servo::setMax(){ + write(maxRange); +} + +void Servo::setMin(){ + write(minRange); +} + +Servo::Servo(PinName pin) : _pwm(pin) { + calibrate(); + write(0.5); +} + +void Servo::write(float percent) { + float offset = _range * 2.0 * (percent - 0.5); + _pwm.pulsewidth(0.0015 + clamp(offset, -_range, _range)); + _p = clamp(percent, 0.0, 1.0); +} + +void Servo::position(float degrees) { + float offset = _range * (degrees / _degrees); + _pwm.pulsewidth(0.0015 + clamp(offset, -_range, _range)); +} + +void Servo::calibrate(float range, float degrees) { + _range = range; + _degrees = degrees; +} + +float Servo::read() { + return _p; +} + +Servo& Servo::operator= (float percent) { + write(percent); + return *this; +} + +Servo& Servo::operator= (Servo& rhs) { + write(rhs.read()); + return *this; +} + +Servo::operator float() { + return read(); +}