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7f48057b9e
The leds API did not work in some cases. E.g. with the following sequence: leds_off(LEDS_ALL); leds_toggle(LEDS_GREEN); leds_off(LEDS_ALL); the green LED was remaining on after the last call. This was caused by the toggle feature made synonymous with the invert feature, although it is unrelated. leds_toggle() is indeed supposed to toggle an LED, while leds_invert() is supposed to change the active level of an LED. However, all users of leds_invert() actually meant leds_toggle(), and the invert feature does not make sense in this module because it is not handy due to successive calls to leds_invert() changing the intended behavior, and hardware active levels should be managed in leds_arch_set() (e.g. by XORing the passed value with a hardware-specific constant before setting the output levels of the pins). Consequently, this change: - removes the leds_invert() function, - makes leds_toggle() behave as expected relatively to leds_off() / leds_on(), - sanitizes the code in the leds module. Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
95 lines
2.7 KiB
C
95 lines
2.7 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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*/
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/**
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* \addtogroup dev
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* @{
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*/
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/**
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* \defgroup leds LEDs API
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*
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* The LEDs API defines a set of functions for accessing LEDs for
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* Contiki plaforms with LEDs.
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*
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* A platform with LED support must implement this API.
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* @{
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*/
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#ifndef LEDS_H_
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#define LEDS_H_
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/* Allow platform to override LED numbering */
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#include "contiki-conf.h"
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void leds_init(void);
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/**
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* Blink all LEDs.
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*/
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void leds_blink(void);
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#ifndef LEDS_GREEN
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#define LEDS_GREEN 1
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#endif /* LEDS_GREEN */
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#ifndef LEDS_YELLOW
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#define LEDS_YELLOW 2
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#endif /* LEDS_YELLOW */
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#ifndef LEDS_RED
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#define LEDS_RED 4
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#endif /* LEDS_RED */
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#ifndef LEDS_BLUE
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#define LEDS_BLUE LEDS_YELLOW
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#endif /* LEDS_BLUE */
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#ifdef LEDS_CONF_ALL
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#define LEDS_ALL LEDS_CONF_ALL
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#else /* LEDS_CONF_ALL */
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#define LEDS_ALL 7
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#endif /* LEDS_CONF_ALL */
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/**
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* Returns the current status of all leds
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*/
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unsigned char leds_get(void);
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void leds_on(unsigned char leds);
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void leds_off(unsigned char leds);
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void leds_toggle(unsigned char leds);
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/**
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* Leds implementation
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*/
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void leds_arch_init(void);
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unsigned char leds_arch_get(void);
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void leds_arch_set(unsigned char leds);
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#endif /* LEDS_H_ */
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