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[lcd4linux @ 2004-01-21 06:39:27 by reinelt]

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HD44780 missed the "clear display' sequence
asc255bug handling added
HD44780 tested, works here!

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@328 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
This commit is contained in:
reinelt
2004-01-21 06:39:27 +00:00
parent d29b8c45e9
commit 83df846028
2 changed files with 17 additions and 3 deletions
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drv_HD44780.c
+16 -3
View File
@@ -1,4 +1,4 @@
/* $Id: drv_HD44780.c,v 1.1 2004/01/20 15:32:49 reinelt Exp $
/* $Id: drv_HD44780.c,v 1.2 2004/01/21 06:39:27 reinelt Exp $
*
* new style driver for HD44780-based displays
*
@@ -29,6 +29,11 @@
*
*
* $Log: drv_HD44780.c,v $
* Revision 1.2 2004/01/21 06:39:27 reinelt
* HD44780 missed the "clear display' sequence
* asc255bug handling added
* HD44780 tested, works here!
*
* Revision 1.1 2004/01/20 15:32:49 reinelt
* first version of Next Generation HD44780 (untested! but it compiles...)
* some cleanup in the other drivers
@@ -347,7 +352,9 @@ static int drv_HD_start (char *section)
drv_HD_command (0x03, 0x08, T_EXEC); // Display off, cursor off, blink off
drv_HD_command (0x03, 0x0c, T_CLEAR); // Display on, cursor off, blink off, wait 1.64 ms
drv_HD_command (0x03, 0x06, T_EXEC); // curser moves to right, no shift
drv_HD_command (0x03, 0x01, T_CLEAR); // clear *both* displays
drv_HD_command (0x03, 0x03, T_CLEAR); // return home
return 0;
}
@@ -424,6 +431,7 @@ int drv_HD_list (void)
int drv_HD_init (char *section)
{
WIDGET_CLASS wc;
int asc255bug;
int ret;
XRES=5;
@@ -443,8 +451,13 @@ int drv_HD_init (char *section)
return ret;
// add fixed chars to the bar driver
// most displays have a full block on ascii 255, but some have kind of
// an 'inverted P'. If you specify 'asc255bug 1 in the config, this
// char will not be used, but rendered by the bar driver
cfg_number(section, "asc255bug", 0, 0, 1, &asc255bug);
drv_generic_text_bar_add_segment ( 0, 0,255, 32); // ASCII 32 = blank
drv_generic_text_bar_add_segment (255,255,255,255); // ASCII 255 = block
if (!asc255bug)
drv_generic_text_bar_add_segment (255,255,255,255); // ASCII 255 = block
// register text widget
wc=Widget_Text;
lcd4linux.conf.sample
+1
View File
@@ -14,6 +14,7 @@ Display myHD44780 {
# Port '0x378'
Bits '8'
Size '20x4'
asc255bug 1
Wire {
RW 'GND'
RS 'AUTOFD'