45 lines
952 B
Go
45 lines
952 B
Go
package actuator
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import (
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"github.com/cyrilix/robocar-pca9685/util"
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log "github.com/sirupsen/logrus"
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"periph.io/x/periph/conn/gpio"
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"periph.io/x/periph/experimental/devices/pca9685"
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)
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const (
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LeftAngle = -1.
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RightAngle = 1.
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)
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type Steering struct {
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channel int
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leftPWM, rightPWM int
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dev *pca9685.Dev
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}
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func (s *Steering) SetPulse(pulse int) {
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err := s.dev.SetPwm(s.channel, 0, gpio.Duty(pulse))
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if err != nil {
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log.Infof("unable to set throttle pwm value: %v", err)
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}
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}
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// Set percent value steering
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func (s *Steering) SetPercentValue(p float32) {
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// map absolute angle to angle that vehicle can implement.
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pulse := util.MapRange(float64(p), LeftAngle, RightAngle, float64(s.leftPWM), float64(s.rightPWM))
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s.SetPulse(pulse)
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}
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func NewSteering(channel, leftPWM, rightPWM int) *Steering {
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t := Steering{
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channel: channel,
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dev: device,
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leftPWM: leftPWM,
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rightPWM: rightPWM,
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}
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return &t
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}
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