Added a naive clock implementation based on main loop counting for the Apple2 as it doesn't have a hardware clock.

platform/apple2enh/clock.c

@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2007, 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.
+ * 
+ * Author: Oliver Schmidt <ol.sc@web.de>
+ *
+ * $Id: clock.c,v 1.1 2007/08/10 13:30:02 oliverschmidt Exp $
+ */
+
+#include <apple2.h>
+
+#include "contiki.h"
+
+/* The enhanced Apple//e doesn't have a hardware clock whatsoever. Therefore the
+ * cc65 C-library for this target doesn't include an implementation of clock().
+ */
+
+static unsigned char tick = 14;
+static clock_time_t time;
+
+#include <stdio.h>
+
+/*-----------------------------------------------------------------------------------*/
+void
+clock_init(void)
+{
+  if(get_ostype() >= APPLE_IIGS) {
+    if(*(signed char *)0xC036 < 0) {
+      /* 5 / 14 = 1.0MHz / 2.8MHz */
+      tick = 5;
+    }
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+void
+clock_update(void)
+{
+  static unsigned int count;
+
+  count += tick;
+  if(count > 2500) {
+    count = 0;
+    ++time;
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+clock_time_t
+clock_time(void)
+{
+  return time;
+}
+/*-----------------------------------------------------------------------------------*/

platform/apple2enh/contiki-main.c

@@ -30,7 +30,7 @@
  * 
  * Author: Oliver Schmidt <ol.sc@web.de>
  *
- * $Id: contiki-main.c,v 1.2 2007/05/29 22:02:37 oliverschmidt Exp $
+ * $Id: contiki-main.c,v 1.3 2007/08/10 13:30:02 oliverschmidt Exp $
  */
 
 #include <stdio.h>
@@ -40,6 +40,8 @@
 PROCINIT(&etimer_process,
 	 &tcpip_process);
 
+void clock_update(void);
+
 /*-----------------------------------------------------------------------------------*/
 void
 uip_log(char *message)
@@ -79,10 +81,14 @@ main(void)
   }
 #endif
 
+  clock_init();
+
   printf("Contiki initiated, now starting process scheduling\n");
   
   while(1) {
 
+    clock_update();
+
     if(process_run() < 2) {
 
       etimer_request_poll();