Contiki-NG
minileds.c
1 /*
2  * Copyright (c) 2006, Swedish Institute of Computer Science
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the Institute nor the names of its contributors
14  * may be used to endorse or promote products derived from this software
15  * without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  */
30 
31 /*
32  * Minileds is intended to substitute the full leds package when only
33  * a small portion of the full functionality is required. It is
34  * intended to be syntactically compatible but with a simplified
35  * semantics. The semantic difference lies in not counting the number
36  * of leds_on and leds_off:s. It saves a substantial amount of RAM
37  * (820 bytes on a msp430).
38  */
39 
40 #include "contiki.h"
41 #include "dev/leds.h"
42 
43 void
44 leds_init(void)
45 {
46  LEDS_PxDIR |= (LEDS_CONF_RED | LEDS_CONF_GREEN | LEDS_CONF_YELLOW);
47  LEDS_PxOUT |= (LEDS_CONF_RED | LEDS_CONF_GREEN | LEDS_CONF_YELLOW);
48 }
49 
50 static const unsigned char l2p[LEDS_ALL + 1] = {
51  0,
52  LEDS_CONF_GREEN,
53  LEDS_CONF_YELLOW,
54  LEDS_CONF_YELLOW | LEDS_CONF_GREEN,
55  LEDS_CONF_RED,
56  LEDS_CONF_RED | LEDS_CONF_GREEN,
57  LEDS_CONF_RED | LEDS_CONF_YELLOW,
58  LEDS_CONF_RED | LEDS_CONF_YELLOW | LEDS_CONF_GREEN
59 };
60 
61 
62 void
63 leds_on(unsigned char leds)
64 {
65  LEDS_PxOUT &= ~l2p[leds & LEDS_ALL];
66 }
67 
68 void
69 leds_off(unsigned char leds)
70 {
71  LEDS_PxOUT |= l2p[leds & LEDS_ALL];
72 }
73 
74 void
75 leds_toggle(unsigned char leds)
76 {
77  LEDS_PxOUT ^= l2p[leds & LEDS_ALL];
78 }
void leds_init(void)
Initialise the LED HAL.
Definition: minileds.c:44
void leds_on(unsigned char leds)
Turn on multiple LEDs.
Definition: minileds.c:63
#define LEDS_ALL
The OR mask representation of all device LEDs.
Definition: leds.h:195
void leds_off(unsigned char leds)
Turn off multiple LEDs.
Definition: minileds.c:69
void leds_toggle(unsigned char leds)
Toggle multiple LEDs.
Definition: minileds.c:75
Header file for the LED HAL.