37种传感器

37种传感器

C语言编程

倾斜传感器利用传感器倾斜程度，实现开关功能，原理如同轻触开关，我们代码的主要任务也是利用引脚接收到高低信号，然后根据接收结果控制两个输出电位高低，控制双色LED。

#include <wiringPi.h>
#include <stdio.h>#define TiltPin		0
#define Gpin		1
#define Rpin		2void LED(char* color)
{pinMode(Gpin, OUTPUT);pinMode(Rpin, OUTPUT);if (color == "RED"){digitalWrite(Rpin, HIGH);digitalWrite(Gpin, LOW);}else if (color == "GREEN"){digitalWrite(Rpin, LOW);digitalWrite(Gpin, HIGH);}elseprintf("LED Error");
}int main(void)
{if(wiringPiSetup() == -1){ //when initialize wiring failed,print messageto screenprintf("setup wiringPi failed !");return 1; }pinMode(TiltPin, INPUT);LED("GREEN");while(1){if(0 == digitalRead(TiltPin)){delay(10);if(0 == digitalRead(TiltPin)){LED("RED");printf("Tilt!n");}}else if(1 == digitalRead(TiltPin)){delay(10);if(1 == digitalRead(TiltPin)){while(!digitalRead(TiltPin));LED("GREEN");}}}return 0;
}

Python编程

#!/usr/bin/env python
import RPi.GPIO as GPIOTiltPin = 11
Gpin   = 12
Rpin   = 13def setup():GPIO.setmode(GPIO.BOARD)       # Numbers GPIOs by physical locationGPIO.setup(Gpin, GPIO.OUT)     # Set Green Led Pin mode to outputGPIO.setup(Rpin, GPIO.OUT)     # Set Red Led Pin mode to outputGPIO.setup(TiltPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)    # Set BtnPin's mode is input, and pull up to high level(3.3V)GPIO.add_event_detect(TiltPin, GPIO.BOTH, callback=detect, bouncetime=200)def Led(x):if x == 0:GPIO.output(Rpin, 1)GPIO.output(Gpin, 0)if x == 1:GPIO.output(Rpin, 0)GPIO.output(Gpin, 1)def Print(x):if x == 0:print '    *************'print '    *   Tilt!   *'print '    *************'def detect(chn):Led(GPIO.input(TiltPin))Print(GPIO.input(TiltPin))def loop():while True:passdef destroy():GPIO.output(Gpin, GPIO.HIGH)       # Green led offGPIO.output(Rpin, GPIO.HIGH)       # Red led offGPIO.cleanup()                     # Release resourceif __name__ == '__main__':     # Program start from heresetup()try:loop()except KeyboardInterrupt:  # When 'Ctrl+C' is pressed, the child program destroy() will be  executed.destroy()

**PS：**python编程也如之前的轻触开关一样，也是用电为升降，不过python中利用了GPIO.add_event_detect函数比较高级而已