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commonMain.devices.waveshare.Paj7620U2.kt Maven / Gradle / Ivy
package ch.softappeal.konapi.devices.waveshare
import ch.softappeal.konapi.I2cDevice
/*
Gesture Recognition Sensor
https://www.pixart.com/products-detail/37/PAJ7620U2
https://www.waveshare.com/wiki/PAJ7620U2_Gesture_Sensor
https://www.waveshare.com/wiki/File:PAJ7620U2-Gesture-Sensor-Demo-Code.7z
https://www.waveshare.com/wiki/File:PAJ7620U2_GDS-R1.0_29032016_41002AEN.pdf
*/
public class Paj7620U2(private val device: I2cDevice) {
init {
fun checkPartId() = check(device.read(0x00U).toInt() == 32) { "device isn't a Paj7620U2" }
try {
checkPartId()
} catch (ignored: Exception) {
checkPartId() // seems to fail often on first try
}
with(device) {
// ------------------------------------- select register bank 0
write(0xEFU, 0x00U)
// Cursor Mode Controls
write(0x37U, 0x07U)
write(0x38U, 0x17U)
write(0x39U, 0x06U)
write(0x8BU, 0x01U)
// AE/AG Controls
write(0x46U, 0x2DU)
write(0x47U, 0x0FU)
write(0x4AU, 0x1EU)
write(0x4CU, 0x20U)
write(0x48U, 0x3CU)
write(0x49U, 0x00U)
write(0x51U, 0x10U)
// Clock Controls
write(0x5EU, 0x10U)
write(0x60U, 0x27U)
// GPIO Setting
write(0x80U, 0x42U)
write(0x81U, 0x44U)
write(0x82U, 0x04U)
// Gesture Mode Controls
write(0x90U, 0x06U)
write(0x95U, 0x0AU)
write(0x96U, 0x0CU)
write(0x97U, 0x05U)
write(0x9AU, 0x14U)
write(0x9CU, 0x3FU)
write(0xA5U, 0x19U)
write(0xCCU, 0x19U)
write(0xCDU, 0x0BU)
write(0xCEU, 0x13U)
write(0xCFU, 0x64U)
write(0xD0U, 0x21U)
write(0x83U, 0x20U)
write(0x9FU, 0xF9U)
// ------------------------------------- select register bank 1
write(0xEFU, 0x01U)
// Lens Shading Compensation
write(0x25U, 0x01U)
write(0x27U, 0x39U)
write(0x28U, 0x7FU)
write(0x29U, 0x08U)
// Reserved Registers List
write(0x3EU, 0xFFU)
write(0x5EU, 0x3DU)
write(0x77U, 0x01U)
write(0x41U, 0x40U)
write(0x43U, 0x30U)
// Sleep Mode
write(0x72U, 0x01U)
write(0x73U, 0x35U)
write(0x65U, 0x96U)
write(0x66U, 0x00U)
write(0x67U, 0x97U)
write(0x68U, 0x01U)
write(0x69U, 0xCDU)
write(0x6AU, 0x01U)
write(0x6BU, 0xB0U)
write(0x6CU, 0x04U)
write(0x6DU, 0x2CU)
write(0x6EU, 0x01U)
write(0x74U, 0x00U)
// Image Size Setting
write(0x01U, 0x1EU)
write(0x02U, 0x0FU)
write(0x03U, 0x10U)
write(0x04U, 0x02U)
// ------------------------------------- select register bank 0
write(0xEFU, 0x00U)
// enable interrupts for all gestures
write(0x41U, 0xFFU)
write(0x42U, 0x01U)
}
gesture() // seems to be necessary so that interrupts work
}
public enum class Gesture(internal val value: Int) {
Up(0x01),
Down(0x02),
Left(0x04),
Right(0x08),
Forward(0x10),
Backward(0x20),
Clockwise(0x40),
AntiClockwise(0x80),
Wave(0x100),
}
public fun gesture(): Gesture? {
val gesture = (device.read(0x44U).toInt() shl 8) + device.read(0x43U).toInt()
return Paj7620U2.Gesture.entries.firstOrNull { it.value == gesture }
}
}
