Difference between revisions of "BakeBit - Button"

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(Introduction)
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==Introduction==
 
==Introduction==
 
[[File:BakeBit - Button01.jpg|thumb|Button]]
 
[[File:BakeBit - Button01.jpg|thumb|Button]]
*BakeBit - Button是一个瞬时(非自锁)按钮开关模块,用于检测按键事件,按钮被释放后自动恢复到常态。
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* The BakeBit - Button is an instant button module and it is used to detect button events. When the button is released the module goes back to its default state.
*在按钮未被按下时模块输出高电平,按钮被按下后输出低电平。
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* If the button is not pressed the module will output high otherwise it will output low.
  
 
==特性==
 
==特性==

Revision as of 14:50, 12 December 2016

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1 Introduction

Button
  • The BakeBit - Button is an instant button module and it is used to detect button events. When the button is released the module goes back to its default state.
  • If the button is not pressed the module will output high otherwise it will output low.

2 特性

  • 使用标准的2.0mm 4 Pin BakeBit接口
  • 数字信号输出
  • PCB尺寸(mm):20x24

BakeBit - Button.PCB

  • 引脚说明:
名称 描述
GND
5V 电源5V
NC
SIG 信号

3 示例程序:Button And Buzzer

本示例需要配合蜂鸣器使用。

3.1 硬件连接

简单的将 蜂鸣器 模块插入 D3接口,将 按键 插入 D4 接口,如下面这样:

Button And Buzzer-1.jpg Button And Buzzer-2.jpg

3.2 示例源代码

import bakebit
import time
# Connect the BakeBit Ultrasonic Ranger to digital port D4
# SIG,NC,VCC,GND
ultrasonic_ranger = 4
 
# Connect the BakeBit LED to digital port D3
led = 3                                                                      
 
bakebit.pinMode(led,"OUTPUT")
light = 0
 
while True:
    try:
        # Read distance value from Ultrasonic
	distance = bakebit.ultrasonicRead(ultrasonic_ranger)
        print(distance)
	if distance > 0:
		if distance<10: 
			if light == 0:
				print("\ton")
				bakebit.digitalWrite(led,1)
				light = 1
		else:
			if light == 1:
				print("\toff")
				bakebit.digitalWrite(led,0)
				light = 0
	time.sleep(.2)
 
    except KeyboardInterrupt:
	bakebit.digitalWrite(led,0)
        break
 
    except TypeError:
        print ("Error")
    except IOError:
        print ("Error")

Github

3.3 运行示例

假设你已经参考bakebit教程安装了BakeBit源代码,
要运行示例程序,可以在开发板上进入 BakeBit/Software/Python目录,运行bakebit_prj_Button_And_Buzzer.py:

cd ~/BakeBit/Software/Python
sudo python bakebit_prj_Button_And_Buzzer.py

3.4 运行结果

当按下按键时,蜂鸣器会响起,松开按键时,蜂鸣器停止。

4 相关资料