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https://github.com/tinygo-org/drivers.git
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soypat
109 lines
2.5 KiB
Go
109 lines
2.5 KiB
Go
// Package ft6336 provides a driver for the FT6336 I2C Self-Capacitive touch
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// panel controller.
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//
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// Datasheet: https://focuslcds.com/content/FT6236.pdf
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package ft6336
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import (
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"machine"
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"tinygo.org/x/drivers"
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"tinygo.org/x/drivers/internal/legacy"
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"tinygo.org/x/drivers/touch"
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)
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// Device wraps FT6336 I2C Self-Capacitive touch
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type Device struct {
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bus drivers.I2C
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buf []byte
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Address uint8
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intPin machine.Pin
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}
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// New returns FT6336 device for the provided I2C bus using default address.
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func New(i2c drivers.I2C, intPin machine.Pin) *Device {
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return &Device{
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bus: i2c,
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buf: make([]byte, 11),
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Address: Address,
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intPin: intPin,
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}
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}
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// Config contains settings for FT6636.
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type Config struct {
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}
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// Configure the FT6336 device.
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func (d *Device) Configure(config Config) error {
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d.write1Byte(0xA4, 0x00)
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d.intPin.Configure(machine.PinConfig{Mode: machine.PinInputPulldown})
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return nil
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}
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// SetGMode sets interrupt mode.
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//
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// 0x00 : Interrupt Polling mode
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// 0x01 : Interrupt Trigger mode (default)
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func (d *Device) SetGMode(v uint8) {
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d.write1Byte(RegGMode, v)
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}
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// GetGMode gets interrupt mode.
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func (d *Device) GetGMode() uint8 {
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return d.read8bit(RegGMode)
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}
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// SetPeriodActive sets report rate in Active mode.
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func (d *Device) SetPeriodActive(v uint8) {
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d.write1Byte(RegPeriodActive, v)
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}
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// GetPeriodActive gets report rate in Active mode.
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func (d *Device) GetPeriodActive() uint8 {
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return d.read8bit(RegPeriodActive)
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}
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// GetFirmwareID gets firmware version.
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func (d *Device) GetFirmwareID() uint8 {
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return d.read8bit(RegFirmid)
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}
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// Read reads the registers.
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func (d *Device) Read() []byte {
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d.bus.Tx(uint16(d.Address), []byte{0x02}, d.buf[:])
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return d.buf[:]
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}
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// ReadTouchPoint reads a single touch.Point from the device. The maximum value
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// for each touch.Point is 0xFFFF.
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func (d *Device) ReadTouchPoint() touch.Point {
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d.Read()
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z := 0xFFFFF
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if d.buf[0] == 0 {
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z = 0
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}
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//Scale X&Y to 16 bit for consistency across touch drivers
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return touch.Point{
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X: (int(d.buf[1]&0x0F)<<8 + int(d.buf[2])) * ((1 << 16) / 320),
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Y: (int(d.buf[3]&0x0F)<<8 + int(d.buf[4])) * ((1 << 16) / 270),
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Z: z,
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}
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}
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// Touched returns if touched or not.
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func (d *Device) Touched() bool {
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p := d.ReadTouchPoint()
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return p.Z > 0
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}
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func (d *Device) write1Byte(reg, data uint8) {
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legacy.WriteRegister(d.bus, d.Address, reg, []byte{data})
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}
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func (d *Device) read8bit(reg uint8) uint8 {
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legacy.ReadRegister(d.bus, d.Address, reg, d.buf[:1])
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return d.buf[0]
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}
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