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<== Date ==> <== Thread ==>

Subject: Question about PV name by using pcaspy
From: lzf neu <[email protected]>
To: "[email protected]" <[email protected]>
Date: Wed, 29 Mar 2017 07:37:58 +0000

Hi,


I want to fulfill a goal that when running camonitor command, PV name TEST:PING in the terminal window print "Disconnect!" or "OK!" alternatively.


However, I failed, "self.setParam('PING',a)"  seems only run once in the code and in terminal window only print one result.

I have posted the code in the following lines.

Could you give me some suggestions and any help will be appreciated.


Zhefu


#===============================

#!/usr/bin/env python
import os
import threading
import time

from pcaspy import Driver, SimpleServer
prefix = 'TEST:'
pvdb = {
    'PING' : {
         'type':'enum',
         'enums':['Disconnect!','OK!']
    },
}

class myDriver(Driver):
    def __init__(self):
        super(myDriver, self).__init__()
        tid=threading.Thread(target=self.determine)
        tid.setDaemon(True)
        tid.start()

    def determine(self):
        a=os.system("ping -c 1 -w 1 127.0.0.1")
        if (a==0):
          while True:
             self.setParam('PING',a)
             a=not a
             time.sleep(5)

if __name__ == '__main__':
    server = SimpleServer()
    server.createPV(prefix, pvdb)
    driver = myDriver()

    # process CA transactions
    while True:
        server.process(0.1)


Replies:
Re: Question about PV name by using pcaspy Kasemir, Kay

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