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小小的森 发布于2018-06-19 16:28
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Micropython实例之TPYBoardv102位数码管显示实验

楼层直达
    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)


    接线图
    四位数码管引脚图

图片:1.jpg



图片:2.jpg





    开发板与四位数码管针脚对应:

图片:3.png





    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)
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