Serge NOEL
90 lines
2.2 KiB
Python
90 lines
2.2 KiB
Python
# Try to send and receive some bytes via a serial port
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#
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# Author: Bob Jacobsen, copyright 2009
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# Part of the JMRI distribution
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#
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#
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# We use an Automat object to create a separate thread
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# that can sit there, waiting for each character to
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# arrive. Sending characters, on the other hand,
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# happens immediately.
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#
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import jarray
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import jmri
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import purejavacomm
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class SerialPortTest(jmri.jmrit.automat.AbstractAutomaton) :
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# ctor starts up the serial port
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def __init__(self, portname) :
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# find the port info and open the port
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print "opening ",portname
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self.portID = purejavacomm.CommPortIdentifier.getPortIdentifier(portname)
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self.port = self.portID.open("JMRI", 50)
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# set options on port
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baudrate = 9600
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self.port.setSerialPortParams(baudrate, purejavacomm.SerialPort.DATABITS_8,
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purejavacomm.SerialPort.STOPBITS_1, purejavacomm.SerialPort.PARITY_NONE)
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# get I/O connections for later
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self.inputStream = self.port.getInputStream()
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self.outputStream = self.port.getOutputStream()
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print "Port opened OK"
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return
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# init() is the place for your initialization
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def init(self) :
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return
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# handle() is called repeatedly until it returns false.
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#
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# Modify this to do your calculation.
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def handle(self) :
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# get next character
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next = self.inputStream.read()
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# this sample doesn't do anything with that character except echo it
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print "rcv", next
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# and continue around again
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return 1 # to continue
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def write(self, data) :
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# now send
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self.outputStream.write(data)
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return
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def flush(self) :
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self.outputStream.flush()
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return
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# end of class definition
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# create one of these; provide the name of the serial port
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a = SerialPortTest("COM1")
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# set the thread name, so easy to cancel if needed
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a.setName("SerialPortTest sample script")
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# start running
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a.start();
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# setup now complete, try to send some bytes
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a.write('H')
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a.write('e')
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a.write('l')
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a.write('l')
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a.write('o')
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a.write('!')
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a.write(0x0D)
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a.flush()
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print "End of Script"
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