[树莓派]控制发光二极管

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pi@raspberrypi /home/apinglai $ sudo apt-get install libi2c-dev

pi@raspberrypi /home/apinglai $ sudo apt-get install i2c-tools

pi@raspberrypi /home/apinglai $ sudo apt-get install python-smbus

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pi@raspberrypi /home/apinglai/down $ wget http://project-downloads.drogon.net/files/wiringPi.tgz

pi@raspberrypi /home/apinglai/down $ tar xf wiringPi.tgz

[email protected] /home/apinglai/down $ cd wiringPi/wiringPi/

[email protected] /home/apinglai/down/wiringPi/wiringPi $ sudo make uninstall

[email protected] /home/apinglai/down/wiringPi/wiringPi $ sudo make

[email protected] /home/apinglai/down/wiringPi/wiringPi $ sudo make install

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[email protected] /home/apinglai $ sudo vim led.c

#include <wiringPi.h>

#include <stdio.h>

#include <stdlib.h>

int main (int argc,char* argv[])

{

  if (argc < 2) {

    printf("Usage example: ./led 4 \n");

    return 1;

  }

  int pinNumber = atoi(argv[1]);

  if (-1 == wiringPiSetup()) {

    printf("Setup wiringPi failed!");

    return 1;

  }

  pinMode(pinNumber, OUTPUT); // set mode to output

  while(1) {

    digitalWrite(pinNumber, 1); // output a high level

    delay(800);

    digitalWrite(pinNumber, 0); // output a low level

    delay(800);

  }

  return 0;

}

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[email protected] /home/apinglai $ gcc led.c -o led -lwiringPi

[email protected] /home/apinglai $ ls

led  led.c

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[email protected] /home/apinglai $ sudo ./led 4