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deadprogram
113 lines
2.8 KiB
Go
113 lines
2.8 KiB
Go
//go:build microbit
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// +build microbit
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// Package microbitmatrix implements a driver for the BBC micro:bit's LED matrix.
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//
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// Schematic: https://github.com/bbcmicrobit/hardware/blob/master/SCH_BBC-Microbit_V1.3B.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, 3}, {0, 1}, {1, 4}, {0, 2}},
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{{2, 3}, {2, 4}, {2, 5}, {2, 6}, {2, 7}},
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{{1, 1}, {0, 8}, {1, 2}, {2, 8}, {1, 0}},
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{{0, 7}, {0, 6}, {0, 5}, {0, 4}, {0, 3}},
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{{2, 2}, {1, 6}, {2, 0}, {1, 5}, {2, 1}},
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},
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{ // 90 CCW
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{{0, 2}, {2, 7}, {1, 0}, {0, 3}, {2, 1}},
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{{1, 4}, {2, 6}, {2, 8}, {0, 4}, {1, 5}},
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{{0, 1}, {2, 5}, {1, 2}, {0, 5}, {2, 0}},
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{{1, 3}, {2, 4}, {0, 8}, {0, 6}, {1, 6}},
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{{0, 0}, {2, 3}, {1, 1}, {0, 7}, {2, 2}},
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},
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{ // 180
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{{2, 1}, {1, 5}, {2, 0}, {1, 6}, {2, 2}},
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{{0, 3}, {0, 4}, {0, 5}, {0, 6}, {0, 7}},
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{{1, 0}, {2, 8}, {1, 2}, {0, 8}, {1, 1}},
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{{2, 7}, {2, 6}, {2, 5}, {2, 4}, {2, 3}},
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{{0, 2}, {1, 4}, {0, 1}, {1, 3}, {0, 0}},
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},
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{ // 270
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{{2, 2}, {0, 7}, {1, 1}, {2, 3}, {0, 0}},
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{{1, 6}, {0, 6}, {0, 8}, {2, 4}, {1, 3}},
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{{2, 0}, {0, 5}, {1, 2}, {2, 5}, {0, 1}},
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{{1, 5}, {0, 4}, {2, 8}, {2, 6}, {1, 4}},
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{{2, 1}, {0, 3}, {1, 0}, {2, 7}, {0, 2}},
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},
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}
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type Device struct {
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pin [12]machine.Pin
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buffer [3][9]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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for i := machine.LED_COL_1; i <= machine.LED_ROW_3; i++ {
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d.pin[i-machine.LED_COL_1] = i
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d.pin[i-machine.LED_COL_1].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 row := 0; row < 3; row++ {
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d.DisableAll()
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d.pin[9+row].High()
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for col := 0; col < 9; col++ {
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if d.buffer[row][col] {
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d.pin[col].Low()
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}
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}
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time.Sleep(time.Millisecond * 2)
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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 < 3; row++ {
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for col := 0; col < 9; 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 := machine.LED_COL_1; i <= machine.LED_COL_9; i++ {
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d.pin[i-machine.LED_COL_1].High()
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}
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for i := machine.LED_ROW_1; i <= machine.LED_ROW_3; i++ {
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d.pin[i-machine.LED_COL_1].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 := machine.LED_COL_1; i <= machine.LED_COL_9; i++ {
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d.pin[i-machine.LED_COL_1].Low()
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}
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for i := machine.LED_ROW_1; i <= machine.LED_ROW_3; i++ {
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d.pin[i-machine.LED_COL_1].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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