mirror of
https://github.com/tinygo-org/drivers.git
synced 2026-07-26 10:38:41 +00:00
Anton Fisher
107 lines
2.9 KiB
Go
107 lines
2.9 KiB
Go
package is31fl3731
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import (
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"fmt"
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"tinygo.org/x/drivers"
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)
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// DeviceAdafruitCharlieWing15x7 implements TinyGo driver for Lumissil
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// IS31FL3731 matrix LED driver on Adafruit 15x7 CharliePlex LED Matrix
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// FeatherWing (CharlieWing) board: https://www.adafruit.com/product/3163
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type DeviceAdafruitCharlieWing15x7 struct {
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Device
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}
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// enableLEDs enables only LEDs that are soldered on the Adafruit CharlieWing
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// board. The board has following LEDs matrix layout:
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//
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// "o" - connected (soldered) LEDs
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// "x" - not connected LEDs
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//
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// + - - - - - - - - - - - - - - +
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// | + - - - - - - - - - - - - + |
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// | | | |
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// | | v v
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// +---------------------------------+
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// | o o o o o o o o o o o o o o o x |
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// | o o o o o o o o o o o o o o o x |
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// | o o o o o o o o o o o o o o o x |
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// | o o o o o o o o o o o o o o o x |
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// | o o o o o o o o o o o o o o o x |
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// | o o o o o o o o o o o o o o o x |
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// | o o o o o o o o o o o o o o o x |
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// | x x x x x x x x x x x x x x x x |
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// +---------------------------------+
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// ^ ^ | |
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// | | ... - - + |
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// | + - - - - - - - - - - - - - +
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// |
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// start (address 0x00)
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//
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func (d *DeviceAdafruitCharlieWing15x7) enableLEDs() (err error) {
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for frame := FRAME_0; frame <= FRAME_7; frame++ {
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err = d.selectCommand(frame)
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if err != nil {
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return err
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}
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// Enable left half
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for i := uint8(0); i < 16; i += 2 {
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err = d.bus.WriteRegister(d.Address, i, []byte{0b11111110})
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if err != nil {
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return err
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}
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}
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// Enable right half
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for i := uint8(3); i < 16; i += 2 {
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err = d.bus.WriteRegister(d.Address, i, []byte{0b01111111})
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if err != nil {
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return err
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}
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}
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// Disable invisible column on the right side
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err = d.bus.WriteRegister(d.Address, 1, []byte{0b00000000})
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if err != nil {
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return err
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}
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}
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return nil
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}
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// DrawPixelXY draws a single pixel on the selected frame by its XY coordinates
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// with provided PWM value [0-255]
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func (d *DeviceAdafruitCharlieWing15x7) DrawPixelXY(frame, x, y, value uint8) (err error) {
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var index uint8
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if x >= 15 {
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return fmt.Errorf("invalid value: X is out of range [0, 15]")
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} else if y >= 7 {
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return fmt.Errorf("invalid value: Y is out of range [0, 7]")
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}
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// Board is one pixel shorter (7 vs 8 supported pixels)
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if x < 8 {
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index = 16*x + y + 1
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} else {
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index = 16*(16-x) - y - 1 - 1
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}
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return d.setPixelPWD(frame, index, value)
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}
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// NewAdafruitCharlieWing15x7 creates a new driver with Adafruit 15x7
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// CharliePlex LED Matrix FeatherWing (CharlieWing) layout.
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// Available addresses:
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// - 0x74 (default)
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// - 0x77 (when the address jumper soldered)
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func NewAdafruitCharlieWing15x7(bus drivers.I2C, address uint8) DeviceAdafruitCharlieWing15x7 {
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return DeviceAdafruitCharlieWing15x7{
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Device: Device{
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Address: address,
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bus: bus,
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},
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}
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}
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