From d239998175a99bf8f074ce6f39c4153e368d1a09 Mon Sep 17 00:00:00 2001
From: adamdunkels <adamdunkels>
Date: Fri, 6 Oct 2006 07:47:02 +0000
Subject: [PATCH] Node IDs are stored in EEPROM and restored on bootup

---
 platform/esb/node-id.c | 72 ++++++++++++++++++++++++++++++++++++++++++
 platform/esb/node-id.h |  7 ++--
 2 files changed, 77 insertions(+), 2 deletions(-)
 create mode 100644 platform/esb/node-id.c

diff --git a/platform/esb/node-id.c b/platform/esb/node-id.c
new file mode 100644
index 000000000..86f9ebc53
--- /dev/null
+++ b/platform/esb/node-id.c
@@ -0,0 +1,72 @@
+/*
+ * 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.
+ *
+ * This file is part of the Contiki operating system.
+ *
+ * $Id: node-id.c,v 1.1 2006/10/06 07:47:02 adamdunkels Exp $
+ */
+
+/**
+ * \file
+ *         A brief description of what this file is.
+ * \author
+ *         Adam Dunkels <adam@sics.se>
+ */
+
+#include "node-id.h"
+#include "contiki-conf.h"
+#include "dev/eeprom.h"
+
+unsigned short node_id = 0;
+/*---------------------------------------------------------------------------*/
+void
+node_id_restore(void)
+{
+  unsigned char buf[2];
+  eeprom_read(NODE_ID_EEPROM_OFFSET, buf, 2);
+  if(buf[0] == 0xad &&
+     buf[1] == 0xde) {
+    eeprom_read(NODE_ID_EEPROM_OFFSET + 2, buf, 2);
+    node_id = (buf[0] << 8) | buf[1];
+  } else {
+    node_id = 0;
+  }
+}
+/*---------------------------------------------------------------------------*/
+void
+node_id_burn(unsigned short id)
+{
+  unsigned char buf[2];
+  buf[0] = 0xad;
+  buf[1] = 0xde;
+  eeprom_write(NODE_ID_EEPROM_OFFSET, buf, 2);
+  buf[0] = id >> 8;
+  buf[1] = id & 0xff;
+  eeprom_write(NODE_ID_EEPROM_OFFSET + 2, buf, 2);
+}
+/*---------------------------------------------------------------------------*/
diff --git a/platform/esb/node-id.h b/platform/esb/node-id.h
index a90b24cec..6784939e4 100644
--- a/platform/esb/node-id.h
+++ b/platform/esb/node-id.h
@@ -30,12 +30,15 @@
  *
  * Author: Adam Dunkels <adam@sics.se>
  *
- * $Id: node-id.h,v 1.1 2006/06/17 22:41:27 adamdunkels Exp $
+ * $Id: node-id.h,v 1.2 2006/10/06 07:47:03 adamdunkels Exp $
  */
 
 #ifndef __NODE_ID_H__
 #define __NODE_ID_H__
 
-extern const unsigned short node_id;
+void node_id_restore(void);
+void node_id_burn(unsigned short node_id);
+
+extern unsigned short node_id;
 
 #endif /* __NODE_ID_H__ */