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109 lines
2.6 KiB
Go
109 lines
2.6 KiB
Go
package gpio
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import "github.com/hybridgroup/gobot"
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var _ gobot.Driver = (*LedDriver)(nil)
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// Represents a digital Led
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type LedDriver struct {
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pin string
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name string
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connection gobot.Connection
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high bool
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gobot.Commander
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}
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// NewLedDriver return a new LedDriver given a PwmDigitalWriter, name and pin.
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//
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// Adds the following API Commands:
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// "Brightness" - See LedDriver.Brightness
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// "Toggle" - See LedDriver.Toggle
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// "On" - See LedDriver.On
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// "Off" - See LedDriver.Off
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func NewLedDriver(a PwmDigitalWriter, name string, pin string) *LedDriver {
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l := &LedDriver{
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name: name,
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pin: pin,
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connection: a.(gobot.Connection),
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high: false,
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Commander: gobot.NewCommander(),
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}
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l.AddCommand("Brightness", func(params map[string]interface{}) interface{} {
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level := byte(params["level"].(float64))
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return l.Brightness(level)
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})
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l.AddCommand("Toggle", func(params map[string]interface{}) interface{} {
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return l.Toggle()
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})
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l.AddCommand("On", func(params map[string]interface{}) interface{} {
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return l.On()
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})
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l.AddCommand("Off", func(params map[string]interface{}) interface{} {
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return l.Off()
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})
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return l
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}
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func (l *LedDriver) adaptor() PwmDigitalWriter {
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return l.Connection().(PwmDigitalWriter)
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}
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// Start starts the LedDriver. Returns true on successful start of the driver
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func (l *LedDriver) Start() (errs []error) { return }
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// Halt halts the LedDriver. Returns true on successful halt of the driver
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func (l *LedDriver) Halt() (errs []error) { return }
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func (l *LedDriver) Name() string { return l.name }
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func (l *LedDriver) Pin() string { return l.pin }
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func (l *LedDriver) Connection() gobot.Connection { return l.connection }
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// State return true if the led is On and false if the led is Off
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func (l *LedDriver) State() bool {
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return l.high
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}
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// On sets the led to a high state. Returns true on success
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func (l *LedDriver) On() (err error) {
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err = l.changeState(1)
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if err != nil {
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return
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}
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l.high = true
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return
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}
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// Off sets the led to a low state. Returns true on success
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func (l *LedDriver) Off() (err error) {
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err = l.changeState(0)
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if err != nil {
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return
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}
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l.high = false
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return
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}
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// Toggle sets the led to the opposite of it's current state
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func (l *LedDriver) Toggle() (err error) {
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if l.State() {
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err = l.Off()
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} else {
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err = l.On()
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}
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return
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}
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// Brightness sets the led to the specified level of brightness
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func (l *LedDriver) Brightness(level byte) (err error) {
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return l.adaptor().PwmWrite(l.Pin(), level)
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}
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func (l *LedDriver) changeState(level byte) (err error) {
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return l.adaptor().DigitalWrite(l.Pin(), level)
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}
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