python实现控制COM口的示例

Z时代
2024-01-10
分类：综合

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()