Micropython TPYBoard V10X系列之四位数码管显示实验
上节讲到一位数码管的显示实验,这节讲一下四位数码管显示实验。总体思路大同小异,现在让我们开始吧。
所需原器件
1 TPYBoard v102 一块
2 四位数码管一个
3 杜邦线若干
4 面包板一块(为了接线方便,可不用)
四位数码管引脚图
开发板与四位数码管针脚对应:
数码管引脚 | a | b | c | d | e | f | g | dp | 1 | 2 | 3 | 4 |
TPYBoard开发板 | X1 | X2 | X3 | X4 | X5 | X6 | X7 | X8 | Y9 | Y10 | Y11 | Y12 |
程序源代码:
import pyb from pyb import Pin #数码管a~g dp对应的开发板引脚 d_Pins=[Pin(i,Pin.OUT_PP) for i in ['X1','X2','X3','X4','X5','X6','X7','X8']] #数码管位段1 2 3 4对应的引脚 w_Pins=[Pin(i,Pin.OUT_PP) for i in ['Y9','Y10','Y11','Y12']] number={ '0': [0,0,0,0,0,0,1,1],#0 '1': [1,1,1,1,0,0,1,1],#1 '2': [0,0,1,0,0,1,0,1],#2 '3': [0,0,0,0,1,1,0,1],#3 '4': [1,0,0,1,1,0,0,1],#4 '5': [0,1,0,0,1,0,0,1],#5 '6': [0,1,0,0,0,0,0,1],#6 '7': [0,0,0,1,1,1,1,1],#7 '8': [0,0,0,0,0,0,0,1],#8 '9': [0,0,0,0,1,0,0,1],#9 } def display(num,dp): global number count=0 for pin in d_Pins:#显示num的值 pin.value(number[num][count]) count+=1 if dp==1: d_Pins[7].value(0) def clear(): for i in w_Pins: i.value(0) for i in d_Pins: i.value(1) def showData(num): #分割出数值的百位、千位、个位和小数位的值 d_num=num location=d_num.find('.') if location>0: d_num=d_num.replace('.','') while len(d_num)<4: d_num='0'+d_num for i in range(0,4): pyb.udelay(2000) clear() w_Pins[3-i].value(1) if i==location-1: display(d_num[i],1) else: display(d_num[i],0) if location<0: for i in range(0,4): pyb.udelay(2000) clear() w_Pins[3-i].value(1) display(d_num[i],0) while True: num='9016' showData(num)