first commit of files

models/device.go

@@ -0,0 +1,25 @@
+package models
+
+import "fmt"
+
+type Device struct {
+	startAddress uint
+	length       uint
+	channels     *DMX
+}
+
+func NewDevice(startAddress uint, channels uint, dmx *DMX) *Device {
+	return &Device{
+		startAddress: startAddress,
+		length:       channels,
+		channels:     dmx,
+	}
+}
+
+func (d *Device) SetChannelValue(channel uint, value uint8) error {
+	if d.length == channel {
+		return fmt.Errorf("channel out of range %d", channel)
+	}
+	d.channels.SetValue(d.startAddress+channel, value)
+	return nil
+}