root/XilinxTools/xst_io.py

import os
import subprocess
import sys
from threading import Thread


class Timeout(Thread):
    run = True
    runs = 1
    run_forever = 0
    timeout = 0
    def kill(self):
        self.run = False
    def set_runs(self, runs):
        self.runs = runs
    def set_run_forever(self):
        self.run_forever = 1
    def set_timeout(self,x):
        self.timeout = x
    def run(self):
        while self.runs > 0 and self.run:
            Thread.run(self)
            if(self.timeout):
                time.sleep(self.timeout)
            self.runs = self.runs + self.run_forever - 1

xst = subprocess.Popen('xst', stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)


def LogPrint(Port,File):
    ln = Port.readline()
    print ln
    File.write(ln)

logfile = open('logfile','w')

xst_io = Timeout(target=LogPrint, args=[xst.stdout,logfile])
xst_io.set_run_forever()
xst_io.start()
xst.stdin.write('help -arch virtex5 -command run\n')

##
##xst_io.kill()
##
##xst.stdin.write('quit\n')
##
##logfile.close()