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
开发板与四位数码管针脚对应：
程序源代码:[code brush:python;toolbar:false;]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,1)
else:
display(d_num,0)
if location<0:
for i in range(0,4):
pyb.udelay(2000)
clear()
w_Pins[3-i].value(1)
display(d_num,0)
while True:
num='9016'
showData(num)[/code] |
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