/
ws2812.go
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/
ws2812.go
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// Package ws2812 implements a driver for WS2812 and SK6812 RGB LED strips.
package ws2812 // import "tinygo.org/x/drivers/ws2812"
import (
"errors"
"image/color"
"machine"
)
var errUnknownClockSpeed = errors.New("ws2812: unknown CPU clock speed")
// Device wraps a pin object for an easy driver interface.
type Device struct {
Pin machine.Pin
}
// New returns a new WS2812 driver. It does not touch the pin object: you have
// to configure it as an output pin before calling New.
func New(pin machine.Pin) Device {
return Device{pin}
}
// Write the raw bitstring out using the WS2812 protocol.
func (d Device) Write(buf []byte) (n int, err error) {
for _, c := range buf {
d.WriteByte(c)
}
return len(buf), nil
}
// Write the given color slice out using the WS2812 protocol.
// Colors are sent out in the usual GRB format.
func (d Device) WriteColors(buf []color.RGBA) error {
for _, color := range buf {
d.WriteByte(color.G) // green
d.WriteByte(color.R) // red
d.WriteByte(color.B) // blue
}
return nil
}