python实现串口控制

使用RS232串口线或者是RS232转USB的这一类的接口，会需要com口作为接口来进行输入输出调式，

写了个脚本来控制COM口，用到了Python内建的serial库

代码如下：

    # coding=utf-8
     
    import serial
    import time
     
    def setTout(t):
        print "Old Timeout is:[%s]" % po1.getTimeout()
        po1.setTimeout(t)
        print "New Timeout is:[%s]" % po1.getTimeout()
     
    def sendShell(sp,cmd):
        sp.write(cmd+"\n")
        print "send shell cmd:[%s]" % cmd
        str = sp.readall()
        return str
     
    def shell_io(sp,cmd,sleepTime):
        str = sendShell(sp,cmd)
        print str
        time.sleep(sleepTime)
        
    po1 = serial.Serial('com1',115200)
    timeStart = time.time()
    portnow = po1.portstr         
    print "COM port now is:[%s]" % portnow
    setTout(5)
     
    shell_io(po1,"ls",2)
     
    shell_io(po1,"pwd",2)
     
    shell_io(po1,"ls -l",2)
     
    po1.close()