树莓派共阳数码管

转:http://blog.mangolovecarrot.net/archives

http://www.shumeipai.net/thread-27591-1-1.html?_dsign=ddf4ac66

http://www.tuicool.com/articles/RbAfqy

数码管段数字编号 -》数码管段字母编号 -》小派wPi引脚编号
1 ——》E——》21
2——》D——》22
3——》DP——》23
4——》C——》24
5——》G——》25
7——》B——》0
10——》F——》2
11——》A——》3
（共阳端口的链接）
数码管数字编号 -》wPi引脚编号
6——》26
8——》27
9——》28
12——》29

#!/usr/bin/env python

# encoding: utf-8

import RPi.GPIO
import time

# 定义单个数码管各段led对应的GPIO口
LED_A = 26
LED_B = 19
LED_C = 13
LED_D = 6
LED_E = 5
LED_F = 11
LED_G = 9
LED_DP = 10

# 定义1到4号数码管阳极对应的GPIO口
DIGIT1 = 12
DIGIT2 = 16
DIGIT3 = 20
DIGIT4 = 21

# 定义按钮输入的GPIO口
btn = 27

RPi.GPIO.setmode(RPi.GPIO.BCM)

RPi.GPIO.setup(LED_A, RPi.GPIO.OUT)
RPi.GPIO.setup(LED_B, RPi.GPIO.OUT)
RPi.GPIO.setup(LED_C, RPi.GPIO.OUT)
RPi.GPIO.setup(LED_D, RPi.GPIO.OUT)
RPi.GPIO.setup(LED_E, RPi.GPIO.OUT)
RPi.GPIO.setup(LED_F, RPi.GPIO.OUT)
RPi.GPIO.setup(LED_G, RPi.GPIO.OUT)
RPi.GPIO.setup(LED_DP, RPi.GPIO.OUT)
RPi.GPIO.setup(DIGIT1, RPi.GPIO.OUT)
RPi.GPIO.setup(DIGIT2, RPi.GPIO.OUT)
RPi.GPIO.setup(DIGIT3, RPi.GPIO.OUT)
RPi.GPIO.setup(DIGIT4, RPi.GPIO.OUT)

RPi.GPIO.output(DIGIT1, True)
RPi.GPIO.output(DIGIT2, True)
RPi.GPIO.output(DIGIT3, True)
RPi.GPIO.output(DIGIT4, True)

RPi.GPIO.setup(btn, RPi.GPIO.IN, pull_up_down=RPi.GPIO.PUD_UP)

# 指定no(1-4)号数码管显示数字num(0-9)，第三个参数是显示不显示小数点（true/false）
def showDigit(no, num, showDotPoint):
    # 先将正极拉低，关掉显示
RPi.GPIO.output(DIGIT1, False)
RPi.GPIO.output(DIGIT2, False)
RPi.GPIO.output(DIGIT3, False)
RPi.GPIO.output(DIGIT4, False)

if (num == 0) :
RPi.GPIO.output(LED_A, False)
RPi.GPIO.output(LED_B, False)
RPi.GPIO.output(LED_C, False)
RPi.GPIO.output(LED_D, False)
RPi.GPIO.output(LED_E, False)
RPi.GPIO.output(LED_F, False)
RPi.GPIO.output(LED_G, True)
RPi.GPIO.output(LED_DP, not showDotPoint)
elif (num == 1) :
RPi.GPIO.output(LED_A, True)
RPi.GPIO.output(LED_B, False)
RPi.GPIO.output(LED_C, False)
RPi.GPIO.output(LED_D, True)
RPi.GPIO.output(LED_E, True)
RPi.GPIO.output(LED_F, True)
RPi.GPIO.output(LED_G, True)
RPi.GPIO.output(LED_DP, not showDotPoint)
elif (num == 2) :
RPi.GPIO.output(LED_A, False)
RPi.GPIO.output(LED_B, False)
RPi.GPIO.output(LED_C, True)
RPi.GPIO.output(LED_D, False)
RPi.GPIO.output(LED_E, False)
RPi.GPIO.output(LED_F, True)
RPi.GPIO.output(LED_G, False)
RPi.GPIO.output(LED_DP, not showDotPoint)
elif (num == 3) :
RPi.GPIO.output(LED_A, False)
RPi.GPIO.output(LED_B, False)
RPi.GPIO.output(LED_C, False)
RPi.GPIO.output(LED_D, False)
RPi.GPIO.output(LED_E, True)
RPi.GPIO.output(LED_F, True)
RPi.GPIO.output(LED_G, False)
RPi.GPIO.output(LED_DP, not showDotPoint)
elif (num == 4) :
RPi.GPIO.output(LED_A, True)
RPi.GPIO.output(LED_B, False)
RPi.GPIO.output(LED_C, False)
RPi.GPIO.output(LED_D, True)
RPi.GPIO.output(LED_E, True)
RPi.GPIO.output(LED_F, False)
RPi.GPIO.output(LED_G, False)
RPi.GPIO.output(LED_DP, not showDotPoint)
elif (num == 5) :
RPi.GPIO.output(LED_A, False)
RPi.GPIO.output(LED_B, True)
RPi.GPIO.output(LED_C, False)
RPi.GPIO.output(LED_D, False)
RPi.GPIO.output(LED_E, True)
RPi.GPIO.output(LED_F, False)
RPi.GPIO.output(LED_G, False)
RPi.GPIO.output(LED_DP, not showDotPoint)
elif (num == 6) :
RPi.GPIO.output(LED_A, False)
RPi.GPIO.output(LED_B, True)
RPi.GPIO.output(LED_C, False)
RPi.GPIO.output(LED_D, False)
RPi.GPIO.output(LED_E, False)
RPi.GPIO.output(LED_F, False)
RPi.GPIO.output(LED_G, False)
RPi.GPIO.output(LED_DP, not showDotPoint)
elif (num == 7) :
RPi.GPIO.output(LED_A, False)
RPi.GPIO.output(LED_B, False)
RPi.GPIO.output(LED_C, False)
RPi.GPIO.output(LED_D, True)
RPi.GPIO.output(LED_E, True)
RPi.GPIO.output(LED_F, True)
RPi.GPIO.output(LED_G, True)
RPi.GPIO.output(LED_DP, not showDotPoint)
elif (num == 8) :
RPi.GPIO.output(LED_A, False)
RPi.GPIO.output(LED_B, False)
RPi.GPIO.output(LED_C, False)
RPi.GPIO.output(LED_D, False)
RPi.GPIO.output(LED_E, False)
RPi.GPIO.output(LED_F, False)
RPi.GPIO.output(LED_G, False)
RPi.GPIO.output(LED_DP, not showDotPoint)
elif (num == 9) :
RPi.GPIO.output(LED_A, False)
RPi.GPIO.output(LED_B, False)
RPi.GPIO.output(LED_C, False)
RPi.GPIO.output(LED_D, False)
RPi.GPIO.output(LED_E, True)
RPi.GPIO.output(LED_F, False)
RPi.GPIO.output(LED_G, False)
RPi.GPIO.output(LED_DP, not showDotPoint)

if (no == 1) :
RPi.GPIO.output(DIGIT1, True)
elif (no == 2) :
RPi.GPIO.output(DIGIT2, True)
elif (no == 3) :
RPi.GPIO.output(DIGIT3, True)
elif (no == 4) :
RPi.GPIO.output(DIGIT4, True)

try:
t=0.005
while True:
# 按钮按下时显示日期，否则显示时间
# 为了区别左右的数字，让第二个数码管的小数点显示出来
#（本来应该是一个冒号，我们这个数码管没有，就用小数点代替了）
if (RPi.GPIO.input(btn) == 1):
time.sleep(t)
showDigit(1, int(time.strftime("%H",time.localtime(time.time()))) / 10, False)
time.sleep(t)
showDigit(2, int(time.strftime("%H",time.localtime(time.time()))) % 10, True)
time.sleep(t)
showDigit(3, int(time.strftime("%M",time.localtime(time.time()))) / 10, False)
time.sleep(t)
showDigit(4, int(time.strftime("%M",time.localtime(time.time()))) % 10, False)
else:
time.sleep(t)
showDigit(1, int(time.strftime("%m",time.localtime(time.time()))) / 10, False)
time.sleep(t)
showDigit(2, int(time.strftime("%m",time.localtime(time.time()))) % 10, True)
time.sleep(t)
showDigit(3, int(time.strftime("%d",time.localtime(time.time()))) / 10, False)
time.sleep(t)
showDigit(4, int(time.strftime("%d",time.localtime(time.time()))) % 10, False)

except KeyboardInterrupt:
pass

# 最后清理GPIO口（不做也可以，建议每次程序结束时清理一下，好习惯）
RPi.GPIO.cleanup()