136 lines
4.1 KiB
C
136 lines
4.1 KiB
C
/*
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* Copyright (c) 2005, Swedish Institute of Computer Science
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* @(#)$Id: leds.c,v 1.1 2006/06/17 22:41:16 adamdunkels Exp $
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*/
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#include "dev/leds.h"
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#include "sys/clock.h"
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static struct {
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char green:4, yellow:4, red:4;
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} leds;
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static struct {
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char green:2, yellow:2, red:2; /* These bit fields should really be
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only one bit wide, but that
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crashed gcc... */
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} invert;
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/*---------------------------------------------------------------------------*/
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static void
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show_leds(void)
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{
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leds_arch_set((((leds.green > 0) ^ invert.green) ? LEDS_GREEN : 0) |
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(((leds.yellow > 0) ^ invert.yellow) ? LEDS_YELLOW : 0) |
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(((leds.red > 0) ^ invert.red) ? LEDS_RED : 0));
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}
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/*---------------------------------------------------------------------------*/
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void
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leds_init(void)
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{
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leds.green = leds.red = leds.yellow = 0;
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invert.green = invert.red = invert.yellow = 0;
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leds_arch_init();
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show_leds();
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}
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/*---------------------------------------------------------------------------*/
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void
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leds_blink(void)
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{
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/* Blink all leds. */
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leds_arch_set(LEDS_ALL);
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clock_delay(400);
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show_leds();
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}
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/*---------------------------------------------------------------------------*/
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unsigned char
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leds_get(void) {
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return leds_arch_get();
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}
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/*---------------------------------------------------------------------------*/
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void
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leds_on(unsigned char l)
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{
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if((l & LEDS_GREEN) && leds.green < 15) {
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++leds.green;
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}
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if((l & LEDS_YELLOW) && leds.yellow < 15) {
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++leds.yellow;
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}
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if((l & LEDS_RED) && leds.red < 15) {
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++leds.red;
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}
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show_leds();
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}
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/*---------------------------------------------------------------------------*/
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void
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leds_off(unsigned char l)
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{
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if((l & LEDS_GREEN) && leds.green > 0) {
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--leds.green;
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}
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if((l & LEDS_YELLOW) && leds.yellow > 0) {
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--leds.yellow;
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}
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if((l & LEDS_RED) && leds.red > 0) {
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--leds.red;
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}
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show_leds();
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}
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/*---------------------------------------------------------------------------*/
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void
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leds_toggle(unsigned char leds)
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{
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leds_invert(leds);
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}
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/* invert the <20>nvert register using the leds parameter */
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void leds_invert(unsigned char l) {
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if(l & LEDS_GREEN) {
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invert.green = 1 - invert.green;
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}
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if(l & LEDS_YELLOW) {
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invert.yellow = 1 - invert.yellow;
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}
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if(l & LEDS_RED) {
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invert.red = 1 - invert.red;
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}
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show_leds();
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}
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/*---------------------------------------------------------------------------*/
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void leds_green(int o) { o?leds_on(LEDS_GREEN):leds_off(LEDS_GREEN); }
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void leds_yellow(int o) { o?leds_on(LEDS_YELLOW):leds_off(LEDS_YELLOW); }
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void leds_red(int o) { o?leds_on(LEDS_RED):leds_off(LEDS_RED); }
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