mirror of
https://github.com/tinygo-org/drivers.git
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Ayke van Laethem
df64ce8f50
* Merge AVR support for Digispark and non-Digispark * Fix the error "inline assembly requires more registers than available" * Use a single file for all AVR targets, in a similar style as the Xtensa support.
41 lines
1.0 KiB
Go
41 lines
1.0 KiB
Go
// Package ws2812 implements a driver for WS2812 and SK6812 RGB LED strips.
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package ws2812 // import "tinygo.org/x/drivers/ws2812"
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import (
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"errors"
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"image/color"
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"machine"
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)
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var errUnknownClockSpeed = errors.New("ws2812: unknown CPU clock speed")
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// Device wraps a pin object for an easy driver interface.
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type Device struct {
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Pin machine.Pin
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}
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// New returns a new WS2812 driver. It does not touch the pin object: you have
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// to configure it as an output pin before calling New.
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func New(pin machine.Pin) Device {
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return Device{pin}
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}
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// Write the raw bitstring out using the WS2812 protocol.
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func (d Device) Write(buf []byte) (n int, err error) {
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for _, c := range buf {
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d.WriteByte(c)
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}
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return len(buf), nil
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}
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// Write the given color slice out using the WS2812 protocol.
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// Colors are sent out in the usual GRB format.
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func (d Device) WriteColors(buf []color.RGBA) error {
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for _, color := range buf {
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d.WriteByte(color.G) // green
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d.WriteByte(color.R) // red
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d.WriteByte(color.B) // blue
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}
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return nil
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}
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