nes-proj/core/dev/leds.c

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/*
* Copyright (c) 2005, Swedish Institute of Computer Science
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*/
#include "dev/leds.h"
#include "sys/clock.h"
#include "sys/energest.h"
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static unsigned char leds, invert;
/*---------------------------------------------------------------------------*/
static void
show_leds(unsigned char changed)
{
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if(changed & LEDS_GREEN) {
/* Green did change */
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if((invert ^ leds) & LEDS_GREEN) {
ENERGEST_ON(ENERGEST_TYPE_LED_GREEN);
} else {
ENERGEST_OFF(ENERGEST_TYPE_LED_GREEN);
}
}
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if(changed & LEDS_YELLOW) {
if((invert ^ leds) & LEDS_YELLOW) {
ENERGEST_ON(ENERGEST_TYPE_LED_YELLOW);
} else {
ENERGEST_OFF(ENERGEST_TYPE_LED_YELLOW);
}
}
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if(changed & LEDS_RED) {
if((invert ^ leds) & LEDS_RED) {
ENERGEST_ON(ENERGEST_TYPE_LED_RED);
} else {
ENERGEST_OFF(ENERGEST_TYPE_LED_RED);
}
}
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leds_arch_set(leds ^ invert);
}
/*---------------------------------------------------------------------------*/
void
leds_init(void)
{
leds_arch_init();
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leds = invert = 0;
}
/*---------------------------------------------------------------------------*/
void
leds_blink(void)
{
/* Blink all leds. */
unsigned char inv;
inv = ~(leds ^ invert);
leds_invert(inv);
clock_delay(400);
leds_invert(inv);
}
/*---------------------------------------------------------------------------*/
unsigned char
leds_get(void) {
return leds_arch_get();
}
/*---------------------------------------------------------------------------*/
void
leds_on(unsigned char ledv)
{
unsigned char changed;
changed = (~leds) & ledv;
leds |= ledv;
show_leds(changed);
}
/*---------------------------------------------------------------------------*/
void
leds_off(unsigned char ledv)
{
unsigned char changed;
changed = leds & ledv;
leds &= ~ledv;
show_leds(changed);
}
/*---------------------------------------------------------------------------*/
void
leds_toggle(unsigned char ledv)
{
leds_invert(ledv);
}
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/*---------------------------------------------------------------------------*/
/* invert the invert register using the leds parameter */
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void
leds_invert(unsigned char ledv) {
invert = invert ^ ledv;
show_leds(ledv);
}
/*---------------------------------------------------------------------------*/