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Minimalistic plug in replacement for the leds package.

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bg- 2006-09-27 09:32:08 +00:00
parent e117830406
commit 752fa92657
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cpu/msp430/minileds.c Normal file
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/*
* Copyright (c) 2006, 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.
*
* @(#)$Id: minileds.c,v 1.1 2006/09/27 09:32:08 bg- Exp $
*/
/*
* Minileds is intended to substitute the full leds package when only
* a small portion of the full functionality is required. It is
* intended to be syntactically compatible but with a simplified
* semantics. The semantic difference lies in not counting the number
* of leds_on and leds_off:s. It saves a substantial amount of RAM
* (820 bytes on a msp430).
*/
#include <io.h>
#include "contiki.h"
#include "dev/leds.h"
void
leds_init(void)
{
LEDS_PxDIR |= (LEDS_CONF_RED | LEDS_CONF_GREEN | LEDS_CONF_YELLOW);
LEDS_PxOUT |= (LEDS_CONF_RED | LEDS_CONF_GREEN | LEDS_CONF_YELLOW);
}
static const unsigned char l2p[LEDS_ALL + 1] = {
0,
LEDS_CONF_GREEN,
LEDS_CONF_YELLOW,
LEDS_CONF_YELLOW | LEDS_CONF_GREEN,
LEDS_CONF_RED,
LEDS_CONF_RED | LEDS_CONF_GREEN,
LEDS_CONF_RED | LEDS_CONF_YELLOW,
LEDS_CONF_RED | LEDS_CONF_YELLOW | LEDS_CONF_GREEN
};
void
leds_on(unsigned char leds)
{
LEDS_PxOUT &= ~l2p[leds & LEDS_ALL];
}
void
leds_off(unsigned char leds)
{
LEDS_PxOUT |= l2p[leds & LEDS_ALL];
}
void
leds_toggle(unsigned char leds)
{
/*
* Synonym: void leds_invert(unsigned char leds);
*/
asm(".global leds_invert\nleds_invert:\n");
LEDS_PxOUT ^= l2p[leds & LEDS_ALL];
}