leds.c

00001 /*
00002  * Copyright (c) 2005, Swedish Institute of Computer Science
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  * 1. Redistributions of source code must retain the above copyright
00009  *    notice, this list of conditions and the following disclaimer.
00010  * 2. Redistributions in binary form must reproduce the above copyright
00011  *    notice, this list of conditions and the following disclaimer in the
00012  *    documentation and/or other materials provided with the distribution.
00013  * 3. Neither the name of the Institute nor the names of its contributors
00014  *    may be used to endorse or promote products derived from this software
00015  *    without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
00018  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
00021  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00022  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00023  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00024  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00025  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00026  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00027  * SUCH DAMAGE.
00028  *
00029  * This file is part of the Contiki operating system.
00030  *
00031  * @(#)$Id: leds.c,v 1.7 2009/02/24 21:30:20 adamdunkels Exp $
00032  */
00033 
00034 #include "dev/leds.h"
00035 #include "sys/clock.h"
00036 #include "sys/energest.h"
00037 
00038 static unsigned char leds, invert;
00039 /*---------------------------------------------------------------------------*/
00040 static void
00041 show_leds(unsigned char changed)
00042 {
00043   if(changed & LEDS_GREEN) {
00044     /* Green did change */
00045     if((invert ^ leds) & LEDS_GREEN) {
00046       ENERGEST_ON(ENERGEST_TYPE_LED_GREEN);
00047     } else {
00048       ENERGEST_OFF(ENERGEST_TYPE_LED_GREEN);
00049     }
00050   }
00051   if(changed & LEDS_YELLOW) {
00052     if((invert ^ leds) & LEDS_YELLOW) {
00053       ENERGEST_ON(ENERGEST_TYPE_LED_YELLOW);
00054     } else {
00055       ENERGEST_OFF(ENERGEST_TYPE_LED_YELLOW);
00056     }
00057   }
00058   if(changed & LEDS_RED) {
00059     if((invert ^ leds) & LEDS_RED) {
00060       ENERGEST_ON(ENERGEST_TYPE_LED_RED);
00061     } else {
00062       ENERGEST_OFF(ENERGEST_TYPE_LED_RED);
00063     }
00064   }
00065   leds_arch_set(leds ^ invert);
00066 }
00067 /*---------------------------------------------------------------------------*/
00068 void
00069 leds_init(void)
00070 {
00071   leds_arch_init();
00072   leds = invert = 0;
00073 }
00074 /*---------------------------------------------------------------------------*/
00075 void
00076 leds_blink(void)
00077 {
00078   /* Blink all leds. */
00079   unsigned char inv;
00080   inv = ~(leds ^ invert);
00081   leds_invert(inv);
00082 
00083   clock_delay(400);
00084 
00085   leds_invert(inv);
00086 }
00087 /*---------------------------------------------------------------------------*/
00088 unsigned char
00089 leds_get(void) {
00090   return leds_arch_get();
00091 }
00092 /*---------------------------------------------------------------------------*/
00093 void
00094 leds_on(unsigned char ledv)
00095 {
00096   unsigned char changed;
00097   changed = (~leds) & ledv;
00098   leds |= ledv;
00099   show_leds(changed);
00100 }
00101 /*---------------------------------------------------------------------------*/
00102 void
00103 leds_off(unsigned char ledv)
00104 {
00105   unsigned char changed;
00106   changed = leds & ledv;
00107   leds &= ~ledv;
00108   show_leds(changed);
00109 }
00110 /*---------------------------------------------------------------------------*/
00111 void
00112 leds_toggle(unsigned char ledv)
00113 {
00114   leds_invert(ledv);
00115 }
00116 /*---------------------------------------------------------------------------*/
00117 /*   invert the invert register using the leds parameter */
00118 void
00119 leds_invert(unsigned char ledv) {
00120   invert = invert ^ ledv;
00121   show_leds(ledv);
00122 }
00123 /*---------------------------------------------------------------------------*/

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