129 lines
2.8 KiB
Go
129 lines
2.8 KiB
Go
//go:build thumby
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package board
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import (
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"machine"
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"math/bits"
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"time"
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"tinygo.org/x/drivers/pixel"
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"tinygo.org/x/drivers/ssd1306"
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)
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const (
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Name = "pybadge"
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)
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var (
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Power = dummyBattery{state: UnknownBattery}
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Sensors = baseSensors{}
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Display = mainDisplay{}
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Buttons = &gpioButtons{}
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)
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type mainDisplay struct{}
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func (d mainDisplay) PPI() int {
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return 192 // 72px wide display / 3/8 of an inch wide display
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}
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func (d mainDisplay) Configure() Displayer[pixel.Monochrome] {
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machine.SPI0.Configure(machine.SPIConfig{})
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display := ssd1306.NewSPI(machine.SPI0, machine.THUMBY_DC_PIN, machine.THUMBY_RESET_PIN, machine.THUMBY_CS_PIN)
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display.Configure(ssd1306.Config{
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Width: 72,
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Height: 40,
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ResetCol: ssd1306.ResetValue{28, 99},
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ResetPage: ssd1306.ResetValue{0, 5},
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})
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return &display
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}
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func (d mainDisplay) MaxBrightness() int {
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return 1
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}
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func (d mainDisplay) SetBrightness(level int) {
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// Nothing to do here.
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}
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func (d mainDisplay) WaitForVBlank(defaultInterval time.Duration) {
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dummyWaitForVBlank(defaultInterval)
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}
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func (d mainDisplay) ConfigureTouch() TouchInput {
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return noTouch{}
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}
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type gpioButtons struct {
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state uint8
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previousState uint8
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}
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func (b *gpioButtons) Configure() {
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machine.THUMBY_BTN_A_PIN.Configure(machine.PinConfig{Mode: machine.PinInput})
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machine.THUMBY_BTN_B_PIN.Configure(machine.PinConfig{Mode: machine.PinInput})
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machine.THUMBY_BTN_UDPAD_PIN.Configure(machine.PinConfig{Mode: machine.PinInput})
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machine.THUMBY_BTN_LDPAD_PIN.Configure(machine.PinConfig{Mode: machine.PinInput})
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machine.THUMBY_BTN_DDPAD_PIN.Configure(machine.PinConfig{Mode: machine.PinInput})
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machine.THUMBY_BTN_RDPAD_PIN.Configure(machine.PinConfig{Mode: machine.PinInput})
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}
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func (b *gpioButtons) ReadInput() {
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state := uint8(0)
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if !machine.THUMBY_BTN_A_PIN.Get() {
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state |= 1
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}
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if !machine.THUMBY_BTN_B_PIN.Get() {
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state |= 2
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}
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if !machine.THUMBY_BTN_UDPAD_PIN.Get() {
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state |= 4
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}
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if !machine.THUMBY_BTN_LDPAD_PIN.Get() {
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state |= 8
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}
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if !machine.THUMBY_BTN_DDPAD_PIN.Get() {
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state |= 16
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}
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if !machine.THUMBY_BTN_RDPAD_PIN.Get() {
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state |= 32
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}
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b.state = state
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}
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var codes = [8]Key{
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KeyA,
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KeyB,
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KeyUp,
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KeyLeft,
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KeyDown,
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KeyRight,
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}
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func (b *gpioButtons) NextEvent() KeyEvent {
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// The xor between the previous state and the current state is the buttons
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// that changed.
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change := b.state ^ b.previousState
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if change == 0 {
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return NoKeyEvent
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}
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// Find the index of the button with the lowest index that changed state.
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index := bits.TrailingZeros32(uint32(change))
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e := KeyEvent(codes[index])
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if b.state&(1<<index) == 0 {
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// The button state change was from 1 to 0, so it was released.
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e |= keyReleased
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}
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// This button event was read, so mark it as such.
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// By toggling the bit, the bit will be set to the value that is currently
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// in b.state.
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b.previousState ^= (1 << index)
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return e
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}
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