Python串口操作纸币器1

　　公司需要纸币器开发，参考纸币器文档和网上的一篇vb版本，代码如下：

# -*- coding:utf-8 -*-
# Author: Pete Yim<xpHook@gmail.com>
# Date  : 13-7-31

import threading
import serial
from time import sleep

GLOBAL_COUNT = 0

GLOBAL_OUT_INIT_NUM     =   0
GLOBAL_OUT_CHECK_NUM    =   0
COMMAND_INIT_FLAG       =   False
COMMAND_CHECK_FLAG      =   False
COMMAND_OUTPUT          =   ''
GLOBAL_CASH_1           =   0
GLOBAL_CASH_5           =   0
GLOBAL_CASH_10          =   0
GLOBAL_CASH_20          =   0
GLOBAL_CASH_50          =   0

SERIAL_SETTING = {
    'PORT'      :   4,
    'BAUDRATE'  :   9600,
    'BYTESIZE'  :   serial.EIGHTBITS,
    'PARITY'    :   serial.PARITY_NONE,
    'STOPBITS'  :   serial.STOPBITS_TWO
}

DATA_OUT_DIC = {
    'DATA_OUT_1'    :   '7F8001116582',
    'DATA_OUT_2'    :   '7F000123C988',
    'DATA_OUT_3'    :   '7F800226FC3B56',
    'DATA_OUT_4'    :   '7F000125DD88',
    'DATA_OUT_5'    :   '7F0004240301126757',
    'DATA_OUT_6'    :   '7F0001051E08',
    'DATA_OUT_7'    :   '7F8001195602',
    'DATA_OUT_8'    :   '7F0001093608',
    'DATA_OUT_9'    :   '7F8001071202',
    'DATA_OUT_10'   :   '7F0003029F0021DA',
    'DATA_OUT_11'   :   '7F80010A3F82',
    'DATA_OUT_12'   :   '7F0001071188',
    'DATA_OUT_13'   :   '7F8003029F002266',
    'DATA_OUT_14'   :   '7F00010A3C08'
}

class CashSerial(threading.Thread):
    def __init__(self):
        threading.Thread.__init__(self)
        self.__terminate = False

    def open(self, settings):
        try:
            self.serial = serial.Serial(port=SERIAL_SETTING['PORT'],
                                        baudrate=SERIAL_SETTING['BAUDRATE'],
                                        bytesize=SERIAL_SETTING['BYTESIZE'],
                                        parity=SERIAL_SETTING['PARITY'],
                                        stopbits=SERIAL_SETTING['STOPBITS'])
            self.serial.flushInput()
            self.serial.flushOutput()
            global COMMAND_INIT_FLAG
            COMMAND_INIT_FLAG = True
        except Exception, msg:
            return False, msg.message.decode("gbk")

        return True, "success"

    def resetArduino(self):
        self.serial.setDTR(0)
        sleep(0.1)
        self.serial.setDTR(1)

    def terminate(self):
        self.__terminate = True

    def send(self, data):
        self.serial.write(data)

    def recv(self):
        data, quit = '', False
        while not self.__terminate:
            try:
                n = self.serial.inWaiting()
                if n:
                    data += self.serial.read(n)
                    # for l in xrange(len(data)):
                    #     print '%02X' % ord(data[l])
                    return data.encode('hex')

            except Exception as ex:
                print str(ex)

        return data

    def close(self):
        if self.serial.isOpen():
            self.serial.close()

    def run(self):
        running = True
        i = 0
        while running:
            sleep(0.5)
            # print '*******>> ' + str(i)
            GLOBAL_COUNT = i
            i = i + 1
            #----------------------

            self.exec_command_init()
            sleep(0.02)
            self.exec_command_check()

            global COMMAND_CHECK_FLAG
            if COMMAND_CHECK_FLAG:
                recvdata = self.recv()
                # print "received data >>> " + str(recvdata)
                self.exec_count_cash(recvdata)

    def exec_command_init(self):
        global  COMMAND_INIT_FLAG, GLOBAL_OUT_INIT_NUM, COMMAND_CHECK_FLAG
        if COMMAND_INIT_FLAG:
            GLOBAL_OUT_INIT_NUM += 1

            if GLOBAL_OUT_INIT_NUM == 1:
                send_data = str(DATA_OUT_DIC['DATA_OUT_1']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 2:
                send_data = str(DATA_OUT_DIC['DATA_OUT_1']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 3:
                send_data = str(DATA_OUT_DIC['DATA_OUT_1']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 4:
                send_data = str(DATA_OUT_DIC['DATA_OUT_2']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 5:
                send_data = str(DATA_OUT_DIC['DATA_OUT_3']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 6:
                send_data = str(DATA_OUT_DIC['DATA_OUT_4']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 7:
                send_data = str(DATA_OUT_DIC['DATA_OUT_1']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 8:
                send_data = str(DATA_OUT_DIC['DATA_OUT_5']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 9:
                send_data = str(DATA_OUT_DIC['DATA_OUT_1']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 10:
                send_data = str(DATA_OUT_DIC['DATA_OUT_6']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 11:
                send_data = str(DATA_OUT_DIC['DATA_OUT_7']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 12:
                send_data = str(DATA_OUT_DIC['DATA_OUT_1']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 13:
                send_data = str(DATA_OUT_DIC['DATA_OUT_8']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 14:
                send_data = str(DATA_OUT_DIC['DATA_OUT_9']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 15:
                send_data = str(DATA_OUT_DIC['DATA_OUT_10']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 16:
                send_data = str(DATA_OUT_DIC['DATA_OUT_11']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 17:
                send_data = str(DATA_OUT_DIC['DATA_OUT_12']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 18:
                send_data = str(DATA_OUT_DIC['DATA_OUT_13']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 19:
                send_data = str(DATA_OUT_DIC['DATA_OUT_14']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 20:
                send_data = str(DATA_OUT_DIC['DATA_OUT_9']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 21:
                send_data = str(DATA_OUT_DIC['DATA_OUT_12']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_INIT_NUM == 22:
                send_data = str(DATA_OUT_DIC['DATA_OUT_9']).decode('hex')
                GLOBAL_OUT_INIT_NUM = 0
                COMMAND_INIT_FLAG = False
                COMMAND_CHECK_FLAG = True
                self.send(send_data)

    def exec_command_check(self):
        global COMMAND_CHECK_FLAG, GLOBAL_OUT_CHECK_NUM
        if COMMAND_CHECK_FLAG:
            GLOBAL_OUT_CHECK_NUM += 1

            if GLOBAL_OUT_CHECK_NUM == 1:
                send_data = str(DATA_OUT_DIC['DATA_OUT_12']).decode('hex')
                self.send(send_data)
            elif GLOBAL_OUT_CHECK_NUM == 2:
                send_data = str(DATA_OUT_DIC['DATA_OUT_9']).decode('hex')
                GLOBAL_OUT_CHECK_NUM = 0
                self.send(send_data)

    def exec_count_cash(self, recvdata=''):
        if recvdata:
            cach_data = recvdata[8:12]
            if cach_data == 'ef01':
                global GLOBAL_CASH_1
                GLOBAL_CASH_1 += 1
                print '1块钱：' + str(GLOBAL_CASH_1) + '张。'
            if cach_data == 'ef02':
                global GLOBAL_CASH_5
                GLOBAL_CASH_5 += 1
                print '5块钱：' + str(GLOBAL_CASH_5) + '张。'
            if cach_data == 'ef03':
                global GLOBAL_CASH_10
                GLOBAL_CASH_10 += 1
                print '10块钱：' + str(GLOBAL_CASH_10) + '张。'
            if cach_data == 'ef04':
                global GLOBAL_CASH_20
                GLOBAL_CASH_20 += 1
                print '20块钱：' + str(GLOBAL_CASH_20) + '张。'
            if cach_data == 'ef05':
                global GLOBAL_CASH_50
                GLOBAL_CASH_50 += 1
                print '50块钱：' + str(GLOBAL_CASH_50) + '张。'

if __name__ == '__main__':
    cserial = CashSerial()
    result_status = cserial.open(SERIAL_SETTING)

    if result_status:
        cserial.start()

    # data = "7F8001116582"
    # hexdata = data.decode("hex")
    #
    # myserial.send(hexdata, _type=None)
    #

　　插入1元、5元纸币，识别结果为：

1块钱：1张。
5块钱：1张。