// GetIdentity queries idenitity information from a bricklet
func GetIdentity(t tinkerforge.Tinkerforge, uid uint32) (*BrickletIdentity, error) {
p, err := tinkerforge.NewPacket(uid, 255, true)
if err != nil {
return nil, err
}
res, err := t.Send(p)
if err != nil {
return nil, err
}
i := &BrickletIdentity{}
displayUID := make([]byte, 8)
connectedDisplayUID := make([]byte, 8)
if err = res.Decode(&displayUID, &connectedDisplayUID, &i.Position, &i.HardwareVersion, &i.FirmwareVersion, &i.DeviceIdentifier); err != nil {
return nil, err
}
i.UID = strings.TrimSpace(string(displayUID))
i.ConnectedUID = strings.TrimSpace(string(connectedDisplayUID))
return i, nil
}
// SetRGBValues sets up to 16 color values beginning from 'index' to the values in 'colors'.
func (l *LedStrip) SetRGBValues(index uint16, colors []*Color) error {
// The rgb data
r, g, b := [16]byte{}, [16]byte{}, [16]byte{}
// Trim the slice if necessary
if len(colors) > 16 {
colors = colors[:16]
}
// Copy the colors into the arrays, apply color mapping
for i, c := range colors {
r[i] = c[l.colorMap[0]]
g[i] = c[l.colorMap[1]]
b[i] = c[l.colorMap[2]]
}
// Create packet
p, err := tinkerforge.NewPacket(l.uid, 1, false, index, uint8(len(colors)), r, g, b)
if err != nil {
return err
}
// Send packet
_, err = l.t.Send(p)
return err
}
// GetRGBValues retrieves the currently set RGB values of the LED strip beginning from 'index' and up to 'length' values.
func (l *LedStrip) GetRGBValues(index uint16, length uint8) ([]*Color, error) {
// Limit the length to 16 (maximum the protocol supports)
if length > 16 {
length = 16
}
// Create a new tinkerforge packet for function #2
p, err := tinkerforge.NewPacket(l.uid, 2, true, index, length)
if err != nil {
return nil, err
}
// Send the packet
res, err := l.t.Send(p)
if err != nil {
return nil, err
}
// Decode the values from the answer
r, g, b := [16]byte{}, [16]byte{}, [16]byte{}
if err = res.Decode(&r, &g, &b); err != nil {
return nil, err
}
// Transform the single color arrays into color values
result := make([]*Color, length)
for i := 0; i < int(length); i++ {
result[i] = &Color{}
result[i][l.revColorMap[0]] = r[i]
result[i][l.revColorMap[1]] = g[i]
result[i][l.revColorMap[2]] = b[i]
}
return result, nil
}
// SetChipType sets the type of the LEDs control chip.
func (l *LedStrip) SetChipType(chipType ChipType) error {
// Create a new tinkerforge packet
p, err := tinkerforge.NewPacket(l.uid, 9, false, chipType)
if err != nil {
return err
}
// Send the packet
_, err = l.t.Send(p)
return err
}
// SetClockFrequency sets the frequency of the clock in hertz.
// Allowed values range from 10000 (10kHz) to 2000000 (2MHz).
// The bricklet chooses the next possible frequency automatically.
func (l *LedStrip) SetClockFrequency(frequency uint32) error {
// Create a new tinkerforge packet
p, err := tinkerforge.NewPacket(l.uid, 7, false, frequency)
if err != nil {
return err
}
// Send the packet
_, err = l.t.Send(p)
return err
}
// SetFrameDuration sets the number of milliseconds between frames.
func (l *LedStrip) SetFrameDuration(ms uint16) error {
// Create a new tinkerforge packet for function #3
p, err := tinkerforge.NewPacket(l.uid, 3, false, ms)
if err != nil {
return err
}
// Send the packet
_, err = l.t.Send(p)
return err
}
// GetChipType returns the currently set type of the LEDs control chip.
func (l *LedStrip) GetChipType() (ChipType, error) {
// Create a new tinkerforge packet
p, err := tinkerforge.NewPacket(l.uid, 10, true)
if err != nil {
return 0, err
}
// Send the packet
res, err := l.t.Send(p)
if err != nil {
return 0, err
}
// Decode the chip type
var chipType ChipType
if err = res.Decode(&chipType); err != nil {
return 0, err
}
return chipType, nil
}
// GetClockFrequency returns the currently used clock frequency.
func (l *LedStrip) GetClockFrequency() (uint32, error) {
// Create a new tinkerforge packet
p, err := tinkerforge.NewPacket(l.uid, 8, true)
if err != nil {
return 0, err
}
// Send the packet
res, err := l.t.Send(p)
if err != nil {
return 0, err
}
// Decode the frequency
var frequency uint32
if err = res.Decode(&frequency); err != nil {
return 0, err
}
return frequency, nil
}
// GetSupplyVoltage returns the current voltage the LED strip's LEDs consume in mV.
func (l *LedStrip) GetSupplyVoltage() (uint16, error) {
// Create a new tinkerforge packet
p, err := tinkerforge.NewPacket(l.uid, 5, true)
if err != nil {
return 0, err
}
// Send the packet
res, err := l.t.Send(p)
if err != nil {
return 0, err
}
// Decode the voltage
var voltage uint16
if err = res.Decode(&voltage); err != nil {
return 0, err
}
return voltage, nil
}
// GetFrameDuration returns the currently set number of milliseconds between frames.
func (l *LedStrip) GetFrameDuration() (uint16, error) {
// Create a tinkerforge packet for function #4
p, err := tinkerforge.NewPacket(l.uid, 4, true)
if err != nil {
return 0, err
}
// Send the packet
res, err := l.t.Send(p)
if err != nil {
return 0, err
}
// Decode the duration
var duration uint16
if err = res.Decode(&duration); err != nil {
return 0, err
}
return duration, nil
}