树莓派wiringPi库详解

#include<iostream>
#include<cstdlib>
#include<wiringPi.h>   

const int LEDpin = 1;

int main()
{
      if(-1==wiringPiSetup())
      {
             cerr<<"setup error\n";
             exit(-1);
      }
      pinMode(LEDpin,OUTPUT);      


      for(size_t i=0;i<10;++i)
      {
                digitalWrite(LEDpin,HIGH); 
                delay(600);
                digitalWrite(LEDpin,LOW);
                delay(600);
   
      }
        
      cout<<"------------bye-------------"<<endl;
      return 0;   
}

#include<iostream>
#include<wiringPi.h>
#include<cstdlib>
using namespace std;


const int PWMpin = 1;   //只有wiringPi编号下的1脚（BCM标号下的18脚）支持
void setup();

int main()
{

    setup();
    int val = 0;
    int step = 2;
    while(true)
    {
        if(val>1024)
        {
            step = -step;    
            val = 1024;
        }
        else if(val<0)
        {
            step = -step;
            val = 0;
        }

        pwmWrite(PWMpin,val);
        val+=step;
        delay(10);
    }

    return 0;
}

void setup()
{
    if(-1==wiringPiSetup())
    {
        cerr<<"setup error\n";
        exit(-1);
    }
    pinMode(PWMpin,PWM_OUTPUT);
}

#include<iostream>
#include<wiringPi.h>
#include<cstdlib>
using namespace std;

void ButtonPressed(void);
void setup();

/********************************/
const int LEDPin = 11;
const int ButtonPin = 1;
/*******************************/

int main()
{

    setup();

    //注册中断处理函数
    if(0>wiringPiISR(ButtonPin,INT_EDGE_FALLING,ButtonPressed))
    {
        cerr<<"interrupt function register failure"<<endl;
        exit(-1);
    }


    while(1)
    ;

    return 0;
}

void setup()
{
    if(-1==wiringPiSetup())
    {
        cerr<<"wiringPi setup error"<<endl;
        exit(-1);
    }
    
    pinMode(LEDPin,OUTPUT);    //配置11脚为控制LED的输出模式
    digitalWrite(LEDPin,LOW);  //初始化为低电平

    pinMode(ButtonPin,INPUT);            //配置1脚为输入
    pullUpDnControl(ButtonPin,PUD_UP);  //将1脚上拉到3.3v

}


//中断处理函数：反转LED的电平
void ButtonPressed(void)
{

    digitalWrite(LEDPin,  (HIGH==digitalRead(LEDPin))?LOW:HIGH );

}

#include<reg52.h>
#include"serial.h"

/**********function****************/
bit isOpenPressed(void);
bit isClosePressed(void);
void delay(unsigned int t);
/*********************************/

sbit closeButton = P2^0;   //与关闭按键相连的引脚
sbit openButton  = P2^1;   //与打开按键相连的引脚

void main(void)
{

      closeButton = 1;      //拉高
      openButton  = 1;      //拉高
      
      EA =1;              //打开总中断
      serial_init(9600);  //初始化51串口
              
      while(1)
      {
          if(isClosePressed())     //如果关闭按钮按下
          {
                  serial_write(0);  //发送数据 0给树莓派
                delay(10);
          }
    
          else if(isOpenPressed()) //如果打开按钮按下
          {
                  serial_write(1);     //发送数据 1给树莓派
                delay(10);
          }
      }
}


bit isOpenPressed(void)
{
       bit press =0;

       if(0==openButton)
       {
               delay(5);
            if(0==openButton)
            {
                 while(!openButton)
                 ;
                 press = 1;
            }
       }
        
       return press;    
}

bit isClosePressed(void)
{
       bit press =0;

       if(0==closeButton)
       {
               delay(5);
            if(0==closeButton)
            {
                 while(!closeButton)
                 ;
                  press = 1;
            }
       }
        
       return press;    
}


void delay(unsigned int t)
{
    unsigned int  i    ;
    unsigned char j;
    for(i = t;i>0;i--)
        for(j=120;j>0;j--)
            ;
}

#include<iostream>
#include<cstdlib>
#include<wiringPi.h>
#include<wiringSerial.h>
using namespace std;


void setup();
const int LEDPin = 11;

int main()
{
    setup();
    
    int fd; //Linux 的思想是：将一切IO设备，都看做 文件，fd就是代表串口抽象出来的文件
    
    if((fd = serialOpen("/dev/ttyAMA0",9600))==-1)    //初始化串口，波特率9600
    {
        
        cerr<<"serial open error"<<endl;
        exit(-1);

    }

    while(true)
    {
    
        if(serialDataAvail(fd) >= 1)    //如果串口缓存中有数据
        {
            int data = serialGetchar(fd);

            if(data==0)   //接受到51发送的 数据 0
            {
                // close led
                digitalWrite(LEDPin,LOW);

            }
            else if(data==1)  //接受到51发送的 数据 1
            {
                //open led
                digitalWrite(LEDPin,HIGH);
            }
        }
    

    }

    return 0;
}


void setup()
{
    if(-1==wiringPiSetup())
    {
        cerr<<"set up error"<<endl;
        exit(-1);
    }
    
    pinMode(LEDPin,OUTPUT);
    digitalWrite(LEDPin,HIGH);

}

#include<iostream>
#include<wiringPi.h>
#include <wiringShift.h>
#include<cstdlib>
using namespace std;

const int SERpin = 1;   //serial data input
const int SCKpin = 2;   //shift register clock
const int RCKpin = 3;   // storage register clock
/************************/
void setup();

/*************************/

int main()
{
    setup();
    
    for(int i=0;i<8;++i)
    {
        digitalWrite(RCKpin,LOW);

               shiftOut(SERpin,SCKpin,LSBFIRST,1<<i);
        digitalWrite(RCKpin,HIGH);

               delay(800);
    }
    return 0;
    
}


void setup()
{
    if(-1==wiringPiSetup())
    {
        cerr<<"setup error\n";
        exit(-1);
    }
    
    pinMode(SERpin,OUTPUT);
    pinMode(RCKpin,OUTPUT);
    pinMode(SCKpin,OUTPUT);
    
    
}