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keyboard.go
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keyboard.go
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//go:build tinygo
package keyboard
import (
"bytes"
"context"
"machine"
k "machine/usb/hid/keyboard"
"machine/usb/hid/mouse"
"time"
"github.com/sago35/tinygo-keyboard/keycodes"
"github.com/sago35/tinygo-keyboard/keycodes/jp"
"golang.org/x/exp/slices"
)
type Device struct {
Keyboard UpDowner
Mouse Mouser
Override [][]Keycode
Macros [2048]byte
Debug bool
flashCh chan bool
flashCnt int
kb []KBer
layer int
layerStack []int
baseLayer int
pressed []uint32
repeat map[uint32]time.Time
}
type KBer interface {
Get() []State
Key(layer, index int) Keycode
SetKeycode(layer, index int, key Keycode)
GetKeyCount() int
Init() error
Callback(layer, index int, state State)
}
type UpDowner interface {
Up(c k.Keycode) error
Down(c k.Keycode) error
Write(b []byte) (n int, err error)
}
type State uint8
const (
None State = iota
NoneToPress
Press
PressToRelease
)
type Callback func(layer, index int, state State)
func New() *Device {
kb := &Keyboard{
Port: k.Port(),
}
d := &Device{
Keyboard: kb,
Mouse: mouse.Port(),
pressed: make([]uint32, 0, 10),
flashCh: make(chan bool, 10),
layerStack: make([]int, 0, 6),
repeat: map[uint32]time.Time{},
}
SetDevice(d)
return d
}
func (d *Device) OverrideCtrlH() {
d.Keyboard = &Keyboard{
Port: k.Port(),
overrideCtrlH: true,
}
}
func (d *Device) Init() error {
for _, k := range d.kb {
err := k.Init()
if err != nil {
return err
}
}
d.flashCnt = 0
// TODO: Allow change to match keyboard
layers := LayerCount
keyboards := len(d.kb)
keys := d.GetMaxKeyCount()
// TODO: refactor
rbuf := make([]byte, 4+layers*keyboards*keys*2+len(device.Macros))
_, err := machine.Flash.ReadAt(rbuf, 0)
if err != nil {
return err
}
sz := (int64(rbuf[0]) << 24) + (int64(rbuf[1]) << 16) + (int64(rbuf[2]) << 8) + int64(rbuf[3])
if sz != machine.Flash.Size() {
// No settings are saved
return nil
}
offset := 4
for layer := 0; layer < layers; layer++ {
for keyboard := 0; keyboard < keyboards; keyboard++ {
for key := 0; key < keys; key++ {
kc := Keycode(rbuf[offset+2*key+0]) << 8
kc += Keycode(rbuf[offset+2*key+1])
device.SetKeycode(layer, keyboard, key, kc)
}
offset += keys * 2
}
}
for i, b := range rbuf[offset:] {
if b == 0xFF {
b = 0
}
device.Macros[i] = b
}
//copy(device.Macros[:], rbuf[offset:])
return nil
}
func (d *Device) GetMaxKeyCount() int {
cnt := 0
for _, k := range d.kb {
if cnt < k.GetKeyCount() {
cnt = k.GetKeyCount()
}
}
return cnt
}
func (d *Device) Tick() error {
pressToRelease := []uint32{}
select {
case <-d.flashCh:
d.flashCnt = 1
default:
if d.flashCnt >= 5000 {
d.flashCnt = 0
err := Save()
if err != nil {
return err
}
} else if d.flashCnt > 0 {
d.flashCnt++
}
}
// read from key matrix
noneToPresse := []uint32{}
for kbidx, k := range d.kb {
state := k.Get()
for i := range state {
switch state[i] {
case None:
// skip
case NoneToPress:
x := encKey(kbidx, d.layer, i)
found := false
for _, p := range d.pressed {
if x == p {
found = true
}
}
if !found {
noneToPresse = append(noneToPresse, x)
d.pressed = append(d.pressed, x)
}
case Press:
case PressToRelease:
x := encKey(kbidx, d.layer, i)
for i, p := range d.pressed {
if (x & 0xFF00FFFF) == (p & 0xFF00FFFF) {
d.pressed = append(d.pressed[:i], d.pressed[i+1:]...)
pressToRelease = append(pressToRelease, p)
}
}
}
}
}
for _, xx := range noneToPresse {
kbidx, layer, index := decKey(xx)
x := d.kb[kbidx].Key(layer, index)
if x&keycodes.ModKeyMask == keycodes.ModKeyMask {
d.layer = int(x) & 0x0F
if x&keycodes.ToKeyMask == keycodes.ToKeyMask {
d.baseLayer = d.layer
} else {
d.layerStack = append(d.layerStack, d.layer)
}
} else if x == keycodes.KeyRestoreDefaultKeymap {
// restore default keymap for QMK
machine.Flash.EraseBlocks(0, 1)
} else if x&0xFF00 == keycodes.TypeMacroKey {
no := uint8(x & 0x00FF)
d.RunMacro(no)
} else if x&0xF000 == 0xD000 {
switch x & 0x00FF {
case 0x01, 0x02, 0x04, 0x08, 0x10:
d.Mouse.Press(mouse.Button(x & 0x00FF))
case 0x20:
d.Mouse.WheelDown()
d.repeat[xx] = time.Now().Add(500 * time.Millisecond)
case 0x40:
d.Mouse.WheelUp()
d.repeat[xx] = time.Now().Add(500 * time.Millisecond)
}
} else {
d.Keyboard.Down(k.Keycode(x))
}
d.kb[kbidx].Callback(layer, index, Press)
}
for xx, v := range d.repeat {
if 0 < v.Unix() && v.Sub(time.Now()) < 0 {
kbidx, layer, index := decKey(xx)
x := d.kb[kbidx].Key(layer, index)
if x&0xF000 == 0xD000 {
switch x & 0x00FF {
case 0x20:
d.Mouse.WheelDown()
d.repeat[xx] = time.Now().Add(100 * time.Millisecond)
case 0x40:
d.Mouse.WheelUp()
d.repeat[xx] = time.Now().Add(100 * time.Millisecond)
}
}
}
}
for _, xx := range pressToRelease {
kbidx, layer, index := decKey(xx)
x := d.kb[kbidx].Key(layer, index)
if x&keycodes.ModKeyMask == keycodes.ModKeyMask {
if x&keycodes.ToKeyMask != keycodes.ToKeyMask {
layer = int(x) & 0x0F
idx := slices.Index(d.layerStack, layer)
slices.Delete(d.layerStack, idx, idx+1)
d.layerStack = d.layerStack[:len(d.layerStack)-1]
if len(d.layerStack) == 0 {
d.layer = d.baseLayer
} else {
d.layer = d.layerStack[len(d.layerStack)-1]
}
}
} else if x&0xF000 == 0xD000 {
switch x & 0x00FF {
case 0x01, 0x02, 0x04, 0x08, 0x10:
d.Mouse.Release(mouse.Button(x & 0x00FF))
case 0x20:
//d.Mouse.WheelDown()
d.repeat[xx] = time.Time{}
case 0x40:
//d.Mouse.WheelUp()
d.repeat[xx] = time.Time{}
}
} else {
d.Keyboard.Up(k.Keycode(x))
}
d.kb[kbidx].Callback(layer, index, PressToRelease)
}
return nil
}
func (d *Device) RunMacro(no uint8) error {
macros := bytes.SplitN(d.Macros[:], []byte{0x00}, 16)
macro := macros[no]
for i := 0; i < len(macro); {
if macro[i] == 0x01 {
p := macro[i:]
if p[1] == 0x04 {
// delayMs
delayMs := int(p[2]) + int(p[3]-1)*255
time.Sleep(time.Duration(delayMs) * time.Millisecond)
i += 4
} else {
kc := keycodeViaToTGK(Keycode(p[2]))
sz := 3
if p[1] > 0x04 {
kc = Keycode(p[2]) + Keycode(p[3])<<8
sz += 1
}
i += sz
kc = keycodeViaToTGK(kc)
switch p[1] {
case 0x01, 0x05:
k.Keyboard.Down(k.Keycode(kc))
k.Keyboard.Up(k.Keycode(kc))
case 0x02, 0x06:
k.Keyboard.Down(k.Keycode(kc))
case 0x03, 0x07:
k.Keyboard.Up(k.Keycode(kc))
}
}
} else {
idx := bytes.Index(macro[i:], []byte{0x01})
if idx == -1 {
idx = len(macro)
} else {
idx = i + idx
}
k.Keyboard.Write(macro[i:idx])
i = idx
}
}
return nil
}
func encKey(kb, layer, index int) uint32 {
return (uint32(kb) << 24) | (uint32(layer) << 16) | uint32(index)
}
func decKey(k uint32) (int, int, int) {
kbidx := k >> 24
layer := (k >> 16) & 0xFF
index := k & 0x0000FFFF
return int(kbidx), int(layer), int(index)
}
func (d *Device) Loop(ctx context.Context) error {
err := d.Init()
if err != nil {
return err
}
ticker := time.Tick(1 * time.Millisecond)
cont := true
for cont {
select {
case <-ctx.Done():
cont = false
continue
case <-ticker:
default:
}
err := d.Tick()
if err != nil {
return err
}
}
return nil
}
func (d *Device) Key(layer, kbIndex, index int) Keycode {
if kbIndex >= len(d.kb) {
return 0
}
return d.kb[kbIndex].Key(layer, index)
}
func (d *Device) KeyVia(layer, kbIndex, index int) Keycode {
//fmt.Printf(" KeyVia(%d, %d, %d)\n", layer, kbIndex, index)
if kbIndex >= len(d.kb) {
return 0
}
kc := d.kb[kbIndex].Key(layer, index)
switch kc {
case jp.MouseLeft:
kc = 0x00D1
case jp.MouseRight:
kc = 0x00D2
case jp.MouseMiddle:
kc = 0x00D3
case jp.MouseBack:
kc = 0x00D4
case jp.MouseForward:
kc = 0x00D5
case jp.WheelUp:
kc = 0x00D9
case jp.WheelDown:
kc = 0x00DA
case jp.KeyMediaVolumeInc:
kc = 0x00A9
case jp.KeyMediaVolumeDec:
kc = 0x00AA
case 0xFF10, 0xFF11, 0xFF12, 0xFF13, 0xFF14, 0xFF15:
// TO(x)
kc = 0x5200 | (kc & 0x000F)
case 0xFF00, 0xFF01, 0xFF02, 0xFF03, 0xFF04, 0xFF05:
// MO(x)
kc = 0x5220 | (kc & 0x000F)
case keycodes.KeyRestoreDefaultKeymap:
// restore default keymap for QMK
kc = keycodes.KeyRestoreDefaultKeymap
default:
if kc&0xFF00 == keycodes.TypeMacroKey {
// skip
} else {
kc = kc & 0x0FFF
}
}
return kc
}
func (d *Device) SetKeycode(layer, kbIndex, index int, key Keycode) {
if kbIndex >= len(d.kb) {
return
}
d.kb[kbIndex].SetKeycode(layer, index, key)
}
func (d *Device) SetKeycodeVia(layer, kbIndex, index int, key Keycode) {
if kbIndex >= len(d.kb) {
return
}
//fmt.Printf("SetKeycodeVia(%d, %d, %d, %04X)\n", layer, kbIndex, index, key)
kc := keycodeViaToTGK(key)
d.kb[kbIndex].SetKeycode(layer, index, kc)
}
func keycodeViaToTGK(key Keycode) Keycode {
kc := key | 0xF000
switch key {
case 0x00D1:
kc = jp.MouseLeft
case 0x00D2:
kc = jp.MouseRight
case 0x00D3:
kc = jp.MouseMiddle
case 0x00D4:
kc = jp.MouseBack
case 0x00D5:
kc = jp.MouseForward
case 0x00D9:
kc = jp.WheelUp
case 0x00DA:
kc = jp.WheelDown
case 0x00A9:
kc = jp.KeyMediaVolumeInc
case 0x00AA:
kc = jp.KeyMediaVolumeDec
case 0x5200, 0x5201, 0x5202, 0x5203, 0x5204, 0x5205:
// TO(x)
kc = 0xFF10 | (kc & 0x000F)
case 0x5220, 0x5221, 0x5222, 0x5223, 0x5224, 0x5225:
// MO(x)
kc = 0xFF00 | (kc & 0x000F)
case keycodes.KeyRestoreDefaultKeymap:
kc = keycodes.KeyRestoreDefaultKeymap
default:
if key&0xFF00 == keycodes.TypeMacroKey {
kc = key
}
}
return kc
}
func (d *Device) Layer() int {
return d.layer
}
type Keycode k.Keycode
type Keyboard struct {
pressed []k.Keycode
override []k.Keycode
Port UpDowner
overrideCtrlH bool
}
func (k *Keyboard) Up(c k.Keycode) error {
if len(k.override) > 0 {
for _, p := range k.override {
k.Port.Up(p)
}
k.override = k.override[:0]
for _, p := range k.pressed {
// When overriding, do not press the last key again
if c != p && p != k.pressed[len(k.pressed)-1] {
k.Port.Down(p)
}
}
}
for i, p := range k.pressed {
if c == p {
k.pressed = append(k.pressed[:i], k.pressed[i+1:]...)
return k.Port.Up(c)
}
}
return nil
}
func (k *Keyboard) Down(c k.Keycode) error {
found := false
for _, p := range k.pressed {
if c == p {
found = true
}
}
if !found {
k.pressed = append(k.pressed, c)
if k.overrideCtrlH && len(k.pressed) == 2 && k.pressed[0] == keycodes.KeyLeftCtrl && k.pressed[1] == keycodes.KeyH {
for _, p := range k.pressed {
k.Port.Up(p)
}
k.override = append(k.override, keycodes.KeyBackspace)
return k.Port.Down(keycodes.KeyBackspace)
} else {
if len(k.override) > 0 {
for _, p := range k.override {
k.Port.Up(p)
}
k.override = k.override[:0]
for _, p := range k.pressed {
k.Port.Down(p)
}
}
return k.Port.Down(c)
}
}
return nil
}
func (k *Keyboard) Write(b []byte) (n int, err error) {
return k.Port.Write(b)
}
// UartTxKeyboard is a keyboard that simply sends row/col corresponding to key
// placement via UART. For instructions on how to set it up, see bellow.
//
// ./target/sgkb/right
type UartTxKeyboard struct {
pressed []k.Keycode
Uart *machine.UART
}
func (k *UartTxKeyboard) Up(c k.Keycode) error {
for i, p := range k.pressed {
if c == p {
k.pressed = append(k.pressed[:i], k.pressed[i+1:]...)
row := byte(c >> 8)
col := byte(c)
_, err := k.Uart.Write([]byte{0x55, byte(row), byte(col)})
return err
}
}
return nil
}
func (k *UartTxKeyboard) Down(c k.Keycode) error {
found := false
for _, p := range k.pressed {
if c == p {
found = true
}
}
if !found {
k.pressed = append(k.pressed, c)
row := byte(c >> 8)
col := byte(c)
_, err := k.Uart.Write([]byte{0xAA, byte(row), byte(col)})
return err
}
return nil
}
func (k *UartTxKeyboard) Write(b []byte) (n int, err error) {
return len(b), nil
}