Minimalistic plug in replacement for the leds package.

2006-09-27 09:32:08 +00:00 · 2006-09-27 09:32:08 +00:00 · 752fa92657
commit 752fa92657
parent e117830406
1 changed files with 87 additions and 0 deletions
--- a/cpu/msp430/minileds.c
+++ b/cpu/msp430/minileds.c
@ -0,0 +1,87 @@
+/*
+ * 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];
+}