From 80ad6d155c1b974590f0c96b6291b0baa70b09d5 Mon Sep 17 00:00:00 2001
From: reinelt <>
Date: Thu, 24 Jul 2003 04:48:09 +0000
Subject: [lcd4linux @ 2003-07-24 04:48:09 by reinelt] 'soft clear' needed for
virtual rows
---
HD44780.c | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)
(limited to 'HD44780.c')
diff --git a/HD44780.c b/HD44780.c
index 5367ac2..a35d7b5 100644
--- a/HD44780.c
+++ b/HD44780.c
@@ -1,4 +1,4 @@
-/* $Id: HD44780.c,v 1.28 2003/04/07 06:02:58 reinelt Exp $
+/* $Id: HD44780.c,v 1.29 2003/07/24 04:48:09 reinelt Exp $
*
* driver for display modules based on the HD44780 chip
*
@@ -20,6 +20,9 @@
*
*
* $Log: HD44780.c,v $
+ * Revision 1.29 2003/07/24 04:48:09 reinelt
+ * 'soft clear' needed for virtual rows
+ *
* Revision 1.28 2003/04/07 06:02:58 reinelt
* further parallel port abstraction
*
@@ -247,7 +250,7 @@ static void HD_define_char (int ascii, char *buffer)
}
-int HD_clear (void)
+int HD_clear (int full)
{
int row, col;
@@ -260,8 +263,12 @@ int HD_clear (void)
bar_clear();
GPO=0;
- HD_setGPO (GPO); // All GPO's off
- HD_command (0x01, 1640); // clear display
+
+ if (full) {
+ HD_command (0x01, 1640); // clear display
+ HD_setGPO (GPO); // All GPO's off
+ }
+
return 0;
}
@@ -325,7 +332,7 @@ int HD_init (LCD *Self)
bar_add_segment( 0, 0,255, 32); // ASCII 32 = blank
bar_add_segment(255,255,255,255); // ASCII 255 = block
- HD_clear();
+ HD_clear(1);
return 0;
}
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