mirror of
https://github.com/tinygo-org/drivers.git
synced 2026-07-26 10:38:41 +00:00
Lucas Bremgartner
122 lines
2.8 KiB
Go
122 lines
2.8 KiB
Go
//go:build microbit_v2
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// +build microbit_v2
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// Package microbitmatrix implements a driver for the BBC micro:bit version 2 LED matrix.
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//
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// Schematic: https://github.com/microbit-foundation/microbit-v2-hardware/blob/main/V2.00/MicroBit_V2.0.0_S_schematic.PDF
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package microbitmatrix // import "tinygo.org/x/drivers/microbitmatrix"
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import (
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"machine"
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"time"
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)
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var matrixRotations = [4][5][5][2]uint8{
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{ // 0
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{{0, 0}, {1, 0}, {2, 0}, {3, 0}, {4, 0}},
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{{0, 1}, {1, 1}, {2, 1}, {3, 1}, {4, 1}},
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{{0, 2}, {1, 2}, {2, 2}, {3, 2}, {4, 2}},
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{{0, 3}, {1, 3}, {2, 3}, {3, 3}, {4, 3}},
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{{0, 4}, {1, 4}, {2, 4}, {3, 4}, {4, 4}},
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},
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{ // 90 CCW
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{{4, 0}, {4, 1}, {4, 2}, {4, 3}, {4, 4}},
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{{3, 0}, {3, 1}, {3, 2}, {3, 3}, {3, 4}},
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{{2, 0}, {2, 1}, {2, 2}, {2, 3}, {2, 4}},
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{{1, 0}, {1, 1}, {1, 2}, {1, 3}, {1, 4}},
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{{0, 0}, {0, 1}, {0, 2}, {0, 3}, {0, 4}},
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},
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{ // 180
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{{4, 4}, {3, 4}, {2, 4}, {1, 4}, {0, 4}},
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{{4, 3}, {3, 3}, {2, 3}, {1, 3}, {0, 3}},
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{{4, 2}, {3, 2}, {2, 2}, {1, 2}, {0, 2}},
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{{4, 1}, {3, 1}, {2, 1}, {1, 1}, {0, 1}},
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{{4, 0}, {3, 0}, {2, 0}, {1, 0}, {0, 0}},
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},
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{ // 270
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{{0, 4}, {0, 3}, {0, 2}, {0, 1}, {0, 0}},
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{{1, 4}, {1, 3}, {1, 2}, {1, 1}, {1, 0}},
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{{2, 4}, {2, 3}, {2, 2}, {2, 1}, {2, 0}},
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{{3, 4}, {3, 3}, {3, 2}, {3, 1}, {3, 0}},
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{{4, 4}, {4, 3}, {4, 2}, {4, 1}, {4, 0}},
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},
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}
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type Device struct {
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pin [10]machine.Pin
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buffer [5][5]bool
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rotation uint8
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}
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// Configure sets up the device.
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func (d *Device) Configure(cfg Config) {
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d.SetRotation(cfg.Rotation)
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d.pin[0] = machine.LED_COL_1
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d.pin[1] = machine.LED_COL_2
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d.pin[2] = machine.LED_COL_3
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d.pin[3] = machine.LED_COL_4
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d.pin[4] = machine.LED_COL_5
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d.pin[5] = machine.LED_ROW_1
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d.pin[6] = machine.LED_ROW_2
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d.pin[7] = machine.LED_ROW_3
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d.pin[8] = machine.LED_ROW_4
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d.pin[9] = machine.LED_ROW_5
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for i := 0; i < 10; i++ {
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d.pin[i].Configure(machine.PinConfig{Mode: machine.PinOutput})
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}
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d.ClearDisplay()
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d.DisableAll()
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}
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// Display sends the buffer (if any) to the screen.
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func (d *Device) Display() error {
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for x := 0; x < 5; x++ {
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d.DisableAll()
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d.pin[x].Low()
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for y := 0; y < 5; y++ {
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if d.buffer[x][y] {
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d.pin[5+y].High()
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} else {
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d.pin[5+y].Low()
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}
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}
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time.Sleep(time.Millisecond * 4)
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}
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return nil
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}
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// ClearDisplay erases the internal buffer
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func (d *Device) ClearDisplay() {
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for row := 0; row < 5; row++ {
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for col := 0; col < 5; col++ {
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d.buffer[row][col] = false
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}
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}
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}
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// DisableAll disables all the LEDs without modifying the buffer
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func (d *Device) DisableAll() {
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for i := 0; i < 5; i++ {
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d.pin[i].High()
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d.pin[5+i].Low()
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}
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}
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// EnableAll enables all the LEDs without modifying the buffer
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func (d *Device) EnableAll() {
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for i := 0; i < 5; i++ {
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d.pin[i].Low()
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d.pin[5+i].High()
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}
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}
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// Size returns the current size of the display.
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func (d *Device) Size() (w, h int16) {
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return 5, 5
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}
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