led.c

阿根廷教授编写的嵌入式internet的实验教程的高质量代码

/******************************************************************************************
   Led.c (v1.0)
-------------------------------------------------------------------------------------
This code is from the book:
"Embedded Internet: TCP/IP Basics, Implementation and Applications" by Sergio Scaglia
[Pearson Education, 2006 - ISBN: 0-32-130638-4]

This code is copyright (c) 2006 by Sergio Scaglia, and it may only be used for educational
purposes.  For commercial use, please contact me at [e-mail]
For more information and updates, please visit www.embeddedinternet.org
******************************************************************************************/

#include "Led.h"
#include "hardware.h"
#include "timer.h"
#include <iolpc2129.h>

char led;
char led_enable=1;

void ledOn(void) {

  IO0CLR = LED;
}

void ledOff(void) {

  IO0SET = LED;
}

void led_init() {

  led=0;
  IO0DIR |= LED;
  ledOff();
  timer_start(ledtimer, 1000);
}


void led_process(void) {

  if (timer_expired(ledtimer) && led_enable) {
    if (led) {
      led=0;
      ledOff();
    }else {
      led=1;
      ledOn();
    }
    timer_start(ledtimer, 500);
  }
  if (!led_enable && led) {
    ledOff();
    led=0;
  }
}