树莓派 python 按键红绿交替闪烁测试

树莓派 python 按键红绿交替闪烁测试代码注释

# 测试按键，结果红绿交替闪烁
import RPi.GPIO as GPIO
import time

BtnPin = 19
Gpin    = 5 # 绿色接在管脚5
Rpin    = 6 # 红色接在管脚6

def setup():
    GPIO.setwarnings(False)      #关闭警告
    GPIO.setmode(GPIO.BCM)       # Numbers GPIOs by physical location按物理位置对GPIO编号
    # 输出模式
    GPIO.setup(Gpin, GPIO.OUT)     # Set Green Led Pin mode to output将绿色Led引脚模式设置为输出
    GPIO.setup(Rpin, GPIO.OUT)     # Set Red Led Pin mode to output将红色Led引脚模式设置为输出
    # 按键输入模式
    GPIO.setup(BtnPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)    # Set BtnPin's mode is input, and pull up to high level(3.3V)设置BtnPin的模式为输入，并向上拉至高电平（3.3V） 

    
if __name__ == '__main__':     # Program start from here
    setup()
    try:
        while True:
            # 检测按键为高电平
            if GPIO.input(BtnPin) == True:
                time.sleep(0.01)
                if GPIO.input(BtnPin)==True:
                    GPIO.output(Rpin,1)
                    GPIO.output(Gpin,0)
            elif GPIO.input(BtnPin) == False:
                 time.sleep(0.01)
                 
                 if  GPIO.input(BtnPin) == False:
                    # 按键按下交替闪烁
                    while GPIO.input(BtnPin) ==True:
                        pass
                    GPIO.output(Rpin,0)
                    GPIO.output(Gpin,1)   #绿亮                                           
    except KeyboardInterrupt:  # When 'Ctrl+C' is pressed, the child program destroy() will be  executed.
        GPIO.cleanup()

标签：树莓,output,python,setup,BtnPin,按键,input,GPIO,红绿
来源： https://blog.csdn.net/dujuancao11/article/details/113095922