用python虚拟串口

在linux下调试串口程序，无奈下面的硬件还没到位，所以，想着自己模拟一个串口用用。试了下下面这段代码：

#!/usr/bin/env python
    #coding=utf-8

    import pty
    import os
    import select

    def mkpty():
    #Open a new tty
            master1, slave = pty.openpty()
            slaveName1 = os.ttyname(slave)
            master2, slave = pty.openpty()
            slaveName2 = os.ttyname(slave)

            print '\nslave device names:', slaveName1, slaveName2
            return master1, master2

    if __name__ == "__main__":

            master1, master2 = mkpty()
            while True:
            #       rl=read list, wait until ready to reading 
            #       wl=write list, wait until ready to writing
            #       el=exception list, wait for an "exceptional condition"
            #       timeout = 1s
                    rl, wl, el = select.select([master1, master2], [], [], 1)
                    for device in rl:
                            data = os.read(device, 128)
                            print "read %d data."%len(data)
                            if device == master1:
                                    os.write(master2, data)
                            else:
                                    os.write(master1, data)

pty是假串口的意思，但是支持硬件串口的所有操作。so。。。

另外一个，模拟同事通过串口发来的数据。所有写到master的数据，都被自动的发往slave。所以，我们在slave这边就可以收到想要的数据。

#!/usr/bin/env python
    #coding=utf-8

    import pty
    import os
    import time
    import array
    import random

    def mkpty():
        #make pair of pseudo tty
        master, slave = pty.openpty()
        slaveName = os.ttyname(slave)

        print '\nslave device names:', slaveName
        return master

    if __name__ == "__main__":
        master = mkpty()
        buf = array.array('B', [0] * 7)
        buf[0] = 0x00
        buf[1] = 0x02
        buf[2] = 0x8a
        buf[3] = 0x2d
        buf[4] = 0xc5
        buf[5] = 0x3f
        buf[6] = 0x00

        while True:
            if buf[1] < 40:
                buf[1] = buf[1] + 1
            else:
                buf[1] = 1
                buf[0] = buf[0] + 1

            if buf[0] == 255:
                buf[0] = 0

    #        buf[5] = random.randint(40,50)
            buf[2] = random.randint(0,250)
            buf[6] = ( buf[0]+buf[1]+buf[2]+buf[3]+buf[4]+buf[5]) %256
            os.write(master,  buf)
    #        print buf
            time.sleep(0.02)

原文链接：https://www.cnblogs.com/pied/p/4147094.html

用python虚拟串口

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