2018年山西省电子设计大赛-电子秤上位机Python程序及下位机arduino程序

# ！/usr/bin/env python # coding:utf-8 __author__ = "liyanhe" import time import threading import serial from tkinter import * import decimal,math,string ####################################################################################################################### """ arduino数据采集 """ ser = serial.Serial( #下面这些参数根据情况修改 port='COM8', baudrate=38400, parity=serial.PARITY_ODD, stopbits=serial.STOPBITS_TWO, bytesize=serial.SEVENBITS) hx711 = 0.0 tare = 0.0 data1 = 0.0 def get_data(): global scale,b scale = 228 b = 1 global hx711,tare,data1 hx711 = ser.readline() data1 = float(str(hx711)[2:-5]) x = data1 y = x/ scale + b - tare data.set('%.2f'%y) total = float(unit) * float(y) totalPrice.set('%.2f'%total) global timer timer = threading.Timer(0.5,get_data) timer.start() timer = threading.Timer(0.5,get_data) timer.start() ####################################################################################################################### root = Tk() root.title("电子秤") ####################################################################################################################### global cuncu, display, result, fuhao result = fuhao = None display = StringVar() cuncu = [] class anjianzhi: global cuncu, display, result, fuhao def __init__(self,anjian): self.anjian = anjian def jia(self): cuncu.append(self.anjian) display.set( ''.join(cuncu)) def clear(self): cuncu.clear() data.set('0') totalPrice.set('0') display.set('0') global unit,tare tare = 0 unit = 0 result = None fuhao = None def tare(self): cuncu.clear() data.set('0') totalPrice.set('0') display.set('0') global tare,unit,scale,b tare = data1/scale + b unit = 0 def zhengfu(self): if cuncu[0]: if cuncu[0] == '-': cuncu[0] = '+' elif cuncu[0] == '+': cuncu[0] = '-' else: cuncu.insert(0, '-') display.set(''.join(cuncu)) def xiaoshudian(self): if cuncu.count('.') >= 1: pass else: if cuncu == [] : cuncu.append('0') cuncu.append('.') display.set(''.join(cuncu)) print(fuhao) print(result) display.set(str(result)) cuncu.clear() ####################################################################################################################### unit = 0 def get_entry(): global unit unit = unit_price.get() print(unit) ######################################################################################################################## ''' 容器fm1 文本显示框组件 ''' fm1 = Frame(root) display = StringVar() totalPrice = StringVar() data = StringVar() Label(fm1,text = " 重量 ").grid(row = 0,column = 0,sticky = W + E) Label(fm1,text = " 单价 ").grid(row = 1,column = 0,sticky = W + E) Label(fm1,text = " 总价 ").grid(row = 2,column = 0,sticky = W + E) Label(fm1,text = " g ").grid(row = 0,column = 2,sticky = W + E) Label(fm1,text = " 元/g ").grid(row = 1,column = 2,sticky = W + E) Label(fm1,text = " 元 ").grid(row = 2,column = 2,sticky = W + E) weight = Entry(fm1,textvariable= data) weight.grid(row = 0,column = 1) unit_price = Entry(fm1,textvariable=display) unit_price.grid(row = 1,column = 1) total_price = Entry(fm1,textvariable = totalPrice) total_price.grid(row = 2,column = 1) ######################################################################################################################## ####################################################################################################################### """ 容器fm2 按键组件 """ fm2 = Frame(root) button1 = Button(fm2,text = " 1 ",command = anjianzhi('1').jia) button1.grid(row = 5,column = 0,sticky = N + S + W + E) button2 = Button(fm2,text = " 2 ",command = anjianzhi('2').jia) button2.grid(row = 5,column = 1,sticky = N + S + W + E) button3 = Button(fm2,text = " 3 ",command = anjianzhi('3').jia) button3.grid(row = 5,column = 2,sticky = N + S + W + E) button4 = Button(fm2,text = " 4 ",command = anjianzhi('4').jia) button4.grid(row = 4,column = 0,sticky = N + S + W + E) button5 = Button(fm2,text = " 5 ",command = anjianzhi('5').jia) button5.grid(row = 4,column = 1,sticky = N + S + W + E) button6 = Button(fm2,text = " 6 ",command = anjianzhi('6').jia) button6.grid(row = 4,column = 2,sticky = N + S + W + E) button7 = Button(fm2,text = " 7 ",command = anjianzhi('7').jia) button7.grid(row = 3,column = 0,sticky = N + S + W + E) button8 = Button(fm2,text = " 8 ",command = anjianzhi('8').jia) button8.grid(row = 3,column = 1,sticky = N + S + W + E) button9 = Button(fm2,text = " 9 ",command = anjianzhi('9').jia) button9.grid(row = 3,column = 2,sticky = N + S + W + E) button0 = Button(fm2,text = " 0 ",command = anjianzhi('0').jia) button0.grid(row = 6,column = 0,columnspan = 2,sticky = E + W) buttonDot = Button(fm2,text = " . ",command = anjianzhi('.').jia) buttonDot.grid(row = 6,column = 2,sticky = E + W) buttonClear = Button(fm2,text = "清零",command = anjianzhi('c').clear) buttonClear.grid(row = 3,column = 4,rowspan = 2,sticky = N + S + W + E) buttonTare = Button(fm2,text = "去皮",command = anjianzhi('c').tare) buttonTare.grid(row = 5,column = 4,rowspan = 2,sticky = N + S + W + E) buttonSet = Button(fm2,text = " Enter ",command = get_entry).grid(row = 3,column = 3,rowspan = 4,sticky = N + S + W + E) ######################################################################################################################## ######################################################################################################################## """ 菜单栏组件 """ menu=Menu(root) submenu1=Menu(menu,tearoff=0) menu.add_cascade(label='查看',menu=submenu1) submenu2 = Menu(menu, tearoff=0) submenu2.add_command(label='复制') submenu2.add_command(label='粘贴') menu.add_cascade(label='编辑',menu=submenu2) submenu = Menu(menu, tearoff=0) submenu.add_command(label='查看帮助') submenu.add_separator() submenu.add_command(label='关于电子秤') menu.add_cascade(label='帮助',menu=submenu) root.config(menu=menu) ######################################################################################################################## ''' 组件显示 ''' fm1.pack() fm2.pack() root.mainloop()