First version

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@1152 a1c6a512-1295-4272-9138-f99709370657

firmware/backlight.c

@@ -0,0 +1,96 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Linus Nielsen Feltzing
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "config.h"
+#include <stdlib.h>
+#include "sh7034.h"
+#include "kernel.h"
+#include "thread.h"
+#include "i2c.h"
+#include "debug.h"
+#include "rtc.h"
+#include "settings.h"
+
+#define BACKLIGHT_ON 1
+#define BACKLIGHT_OFF 2
+
+static void backlight_thread(void);
+static char backlight_stack[0x100];
+static struct event_queue backlight_queue;
+
+static int backlight_timer;
+
+void backlight_thread(void)
+{
+    struct event ev;
+    
+    while(1)
+    {
+        queue_wait(&backlight_queue, &ev);
+        switch(ev.id)
+        {
+            case BACKLIGHT_ON:
+                backlight_timer = HZ*global_settings.backlight;
+                if(backlight_timer)
+                {
+#ifdef HAVE_RTC
+                    rtc_write(0x13, 0x10);
+#else
+                    PAIOR |= 0x40;
+#endif
+                }
+                break;
+            case BACKLIGHT_OFF:
+#ifdef HAVE_RTC
+                rtc_write(0x13, 0x00);
+#else
+                PAIOR &= 0xbf;
+#endif                
+                break;
+        }
+    }
+}
+
+void backlight_on(void)
+{
+    queue_post(&backlight_queue, BACKLIGHT_ON, NULL);
+}
+
+void backlight_off(void)
+{
+    queue_post(&backlight_queue, BACKLIGHT_OFF, NULL);
+}
+
+void backlight_tick(void)
+{
+    if(backlight_timer)
+    {
+        backlight_timer--;
+        if(backlight_timer == 0)
+        {
+            backlight_off();
+        }
+    }
+}
+
+void backlight_init(void)
+{
+    queue_init(&backlight_queue);
+    create_thread(backlight_thread, backlight_stack, sizeof(backlight_stack));
+    backlight_on();
+}

firmware/backlight.h

@@ -0,0 +1,27 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Daniel Stenberg
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#ifndef BACKLIGHT_H
+#define BACKLIGHT_H
+
+void backlight_init(void);
+void backlight_on(void);
+void backlight_off(void);
+void backlight_tick(void);
+
+#endif