kscience/controls-kt
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Add Pi serial port

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This commit is contained in:
Alexander Nozik 2023-05-19 20:27:08 +03:00
parent 28cb9af267
commit a5a2edc81a
3 changed files with 70 additions and 11 deletions
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4
controls-core/src/jvmMain/kotlin/space/kscience/controls/ports/ChannelPort.kt
View File

@ -15,7 +15,7 @@ import java.nio.channels.DatagramChannel
import java.nio.channels.SocketChannel
import kotlin.coroutines.CoroutineContext
internal fun ByteBuffer.readArray(limit: Int = limit()): ByteArray {
public fun ByteBuffer.toArray(limit: Int = limit()): ByteArray {
rewind()
val response = ByteArray(limit)
get(response)
@ -48,7 +48,7 @@ public class ChannelPort (
try {
val num = channel.read(buffer)
if (num > 0) {
receive(buffer.readArray(num))
receive(buffer.toArray(num))
}
if (num < 0) cancel("The input channel is exhausted")
} catch (ex: Exception) {

19
controls-pi/src/main/kotlin/space/kscience/controls/pi/PiPlugin.kt Normal file
View File

@ -0,0 +1,19 @@
package space.kscience.controls.pi
import space.kscience.dataforge.context.AbstractPlugin
import space.kscience.dataforge.context.Context
import space.kscience.dataforge.context.PluginFactory
import space.kscience.dataforge.context.PluginTag
import space.kscience.dataforge.meta.Meta
public class PiPlugin : AbstractPlugin() {
override val tag: PluginTag get() = Companion.tag
public companion object : PluginFactory<PiPlugin> {
override val tag: PluginTag = PluginTag("controls.ports.pi", group = PluginTag.DATAFORGE_GROUP)
override fun build(context: Context, meta: Meta): PiPlugin = PiPlugin()
}
}

56
controls-pi/src/main/kotlin/space/kscience/controls/pi/PiSerialPort.kt
View File

@ -1,14 +1,19 @@
package space.kscience.controls.pi
import com.pi4j.io.serial.FlowControl
import com.pi4j.io.serial.Parity
import com.pi4j.Pi4J
import com.pi4j.io.serial.Serial
import com.pi4j.io.serial.StopBits
import com.pi4j.ktx.io.open
import com.pi4j.ktx.io.piGpioSerialProvider
import com.pi4j.io.serial.SerialConfigBuilder
import com.pi4j.ktx.io.serial
import kotlinx.coroutines.*
import space.kscience.controls.ports.AbstractPort
import space.kscience.controls.ports.Port
import space.kscience.controls.ports.PortFactory
import space.kscience.controls.ports.toArray
import space.kscience.dataforge.context.Context
import space.kscience.dataforge.context.error
import space.kscience.dataforge.context.logger
import space.kscience.dataforge.meta.Meta
import java.nio.ByteBuffer
import kotlin.coroutines.CoroutineContext
public class PiSerialPort(
@ -17,9 +22,44 @@ public class PiSerialPort(
public val serialBuilder: () -> Serial,
) : AbstractPort(context, coroutineContext) {
private val serial by lazy { serialBuilder() }
private val serial: Serial by lazy { serialBuilder() }
override suspend fun write(data: ByteArray) {
TODO()
private val listenerJob = this.scope.launch(Dispatchers.IO) {
val buffer = ByteBuffer.allocate(1024)
while (isActive) {
try {
val num = serial.read(buffer)
if (num > 0) {
receive(buffer.toArray(num))
}
if (num < 0) cancel("The input channel is exhausted")
} catch (ex: Exception) {
logger.error(ex) { "Channel read error" }
delay(1000)
}
}
}
override suspend fun write(data: ByteArray): Unit = withContext(Dispatchers.IO) {
serial.write(data)
}
override fun close() {
listenerJob.cancel()
serial.close()
}
public companion object : PortFactory {
override val type: String get() = "pi"
public fun open(context: Context, device: String, block: SerialConfigBuilder.() -> Unit): PiSerialPort =
PiSerialPort(context) { Pi4J.newAutoContext().serial(device, block) }
override fun build(context: Context, meta: Meta): Port = PiSerialPort(context) {
Pi4J.newAutoContext().serial()
}
}
}