1 files changed, 70 insertions, 0 deletions

diff --git a/firmware/drivers/led.c b/firmware/drivers/led.c
new file mode 100644
index 0000000000..d01c9de612
--- /dev/null
+++ b/firmware/drivers/led.c
@@ -0,0 +1,70 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Alan Korr
+ *
+ * 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 <led.h>
+
+#define turn_on() \
+  set_bit (LEDB,PBDR_ADDR+1)
+
+#define turn_off() \
+  clear_bit (LEDB,PBDR_ADDR+1)
+
+#define start_timer() \
+  set_bit (2,TSTR_ADDR)
+
+#define stop_timer() \
+  clear_bit (2,TSTR_ADDR)
+
+#define eoi(subinterrupt) \
+  clear_bit (subinterrupt,TSR2_ADDR)
+
+#define set_volume(volume) \
+  GRA2 = volume & 0x7FFF
+
+
+void led_set_volume (unsigned short volume)
+{
+    volume <<= 10;
+    if (volume == 0)
+        led_turn_off ();
+    else if (volume == 0x8000) 
+        led_turn_on ();
+    else
+    {
+        set_volume (volume);
+        start_timer ();
+    }
+}
+
+#pragma interrupt
+void IMIA2 (void)
+{
+    turn_off ();
+    eoi (0);
+}
+
+#pragma interrupt
+void OVI2 (void)
+{
+    turn_on ();
+    eoi (2);
+}
+