树梅派学习 10. 倾斜传感器使用

电路图

接线图

程序代码

#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;
}

编译运行

gcc tilt_switch.c -o tilt_switch -lwiringPi -lpthread
./tilt_switch

运行效果：

发生倾斜时，倾斜传感器绿灯亮，三色LED变色。