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Merge pull request #59 from kurbatov/fix/37-digital-pin-value-message
Fix/37 digital pin value message
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106 changes: 106 additions & 0 deletions
106
src/main/java/org/firmata4j/transport/JSSCTransport.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| /* | ||
| * The MIT License (MIT) | ||
| * | ||
| * Copyright (c) 2014-2021 Oleg Kurbatov (o.v.kurbatov@gmail.com) | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in | ||
| * all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| * THE SOFTWARE. | ||
| */ | ||
| package org.firmata4j.transport; | ||
|
|
||
| import java.io.IOException; | ||
| import jssc.SerialPort; | ||
| import jssc.SerialPortEvent; | ||
| import jssc.SerialPortEventListener; | ||
| import jssc.SerialPortException; | ||
| import org.firmata4j.Parser; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
||
| /** | ||
| * Transfers data via serial port using jssc library. | ||
| * | ||
| * @author Ali Kia | ||
| */ | ||
| public class JSSCTransport implements TransportInterface, SerialPortEventListener { | ||
| private Parser parser; | ||
|
|
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| private final SerialPort port; | ||
|
|
||
| private static final Logger LOGGER = LoggerFactory.getLogger(JSSCTransport.class); | ||
|
|
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| public JSSCTransport(String portName) { | ||
| this.port = new SerialPort(portName); | ||
| } | ||
|
|
||
| @Override | ||
| public void start() throws IOException { | ||
| if (!port.isOpened()) { | ||
| try { | ||
| port.openPort(); | ||
| port.setParams( | ||
| SerialPort.BAUDRATE_57600, | ||
| SerialPort.DATABITS_8, | ||
| SerialPort.STOPBITS_1, | ||
| SerialPort.PARITY_NONE); | ||
| port.setEventsMask(SerialPort.MASK_RXCHAR); | ||
| port.addEventListener(this); | ||
| } catch (SerialPortException ex) { | ||
| throw new IOException("Cannot start firmata device", ex); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public void stop() throws IOException { | ||
| try { | ||
| if (port.isOpened()) { | ||
| port.purgePort(SerialPort.PURGE_RXCLEAR | SerialPort.PURGE_TXCLEAR); | ||
| port.closePort(); | ||
| } | ||
| } catch (SerialPortException ex) { | ||
| throw new IOException("Cannot properly stop firmata device", ex); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public void write(byte[] bytes) throws IOException { | ||
| try { | ||
| port.writeBytes(bytes); | ||
| } catch (SerialPortException ex) { | ||
| throw new IOException("Cannot send message to device", ex); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public void setParser(Parser parser) { | ||
| this.parser = parser; | ||
| } | ||
|
|
||
| @Override | ||
| public void serialEvent(SerialPortEvent event) { | ||
| // queueing data from input buffer to processing by FSM logic | ||
| if (event.isRXCHAR() && event.getEventValue() > 0) { | ||
| try { | ||
| parser.parse(port.readBytes()); | ||
| } catch (SerialPortException ex) { | ||
| LOGGER.error("Cannot read from device", ex); | ||
| } | ||
| } | ||
| } | ||
| } |
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