mangavalk/lcdproc
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- Added HD44780 incremental LCD update.

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- Minor fix to 4bit.
This commit is contained in:
robijn
2001-11-15 19:30:17 +00:00
parent a2ffbde152
commit 392506b384
2 changed files with 40 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files
server/drivers/hd44780-4bit.c
+8 -1
View File
@@ -117,9 +117,9 @@ hd_init_4bit (HD44780_functions * hd44780_functions, lcd_logical_driver * driver
enableLines |= EN3;
port_out (lptPort + 2, 0 ^ OUTMASK);
}
port_out (lptPort, 0x03);
if( delayBus ) hd44780_functions->uPause (1);
port_out (lptPort, enableLines | 0x03);
if (extIF)
port_out (lptPort + 2, ALLEXT ^ OUTMASK);
@@ -148,6 +148,9 @@ hd_init_4bit (HD44780_functions * hd44780_functions, lcd_logical_driver * driver
hd44780_functions->uPause (40);
// now in 8-bit mode... set 4-bit mode
port_out (lptPort, 0x02);
if( delayBus ) hd44780_functions->uPause (1);
port_out (lptPort, enableLines | 0x02);
if (extIF)
port_out (lptPort + 2, ALLEXT ^ OUTMASK);
@@ -157,6 +160,10 @@ hd_init_4bit (HD44780_functions * hd44780_functions, lcd_logical_driver * driver
port_out (lptPort + 2, 0 ^ OUTMASK);
hd44780_functions->uPause (40);
// Set up two-line, small character (5x8) mode
hd44780_functions->senddata (0, RS_INSTR, FUNCSET | TWOLINE | SMALLCHAR );
hd44780_functions->uPause (40);
common_init ();
if (have_keypad) {
server/drivers/hd44780.c
+32 -9
View File
@@ -151,6 +151,9 @@ static char pressed_key = 0;
static int pressed_key_repetitions = 0;
static struct timeval pressed_key_time;
// for incremental updates store last lcd contents
static char * lcd_contents = (char *) 0;
// function declarations
void HD44780_close ();
void HD44780_flush ();
@@ -272,6 +275,15 @@ HD44780_init (lcd_logical_driver * driver, char *args)
//HD44780_close();
return -1;
}
// Allocate and clear the buffer for incremental updates
lcd_contents = (unsigned char *) malloc (HD44780->wid * HD44780->hgt);
if (!lcd_contents) {
return -1;
}
memset(lcd_contents, ' ', HD44780->wid * HD44780->hgt);
// Set the functions the driver supports...
// These are the default HD44780 functions
driver->init = HD44780_init;
@@ -384,6 +396,8 @@ uPause (int usecs)
//
void HD44780_close()
{
free( HD44780->framebuf );
free( lcd_contents );
}
/////////////////////////////////////////////////////////////////
@@ -813,21 +827,30 @@ void
HD44780_draw_frame (char *dat)
{
int x, y;
int wid = HD44780->wid;
char drawing;
if (!dat)
return;
for (y = 0; y < HD44780->hgt; y++) {
//printf("\n%d :",y);
for (x = 0; x < HD44780->wid; x++) {
if( x % 8 == 0 )
HD44780_position (x, y);
hd44780_functions->senddata (spanList[y], RS_DATA, HD44780_charmap[(unsigned char)dat[(y * HD44780->wid) + x]]);
hd44780_functions->uPause (40); // Minimum exec time for all commands
// Update LCD incrementally by comparing with last contents
for (y=0; y<HD44780->hgt; y++) {
drawing = 0;
for (x=0 ; x<wid; x++) {
if( dat[(y*wid)+x] != lcd_contents[(y*wid)+x] ) {
if( !drawing || x % 8 == 0 ) { // x%8 for 16x1 displays
drawing = 1;
HD44780_position(x,y);
}
hd44780_functions->senddata( spanList[y], RS_DATA, HD44780_charmap[(unsigned char)dat[(y * wid) + x]]);
hd44780_functions->uPause (40); // Minimum exec time for all commands
lcd_contents[(y*wid)+x] = dat[(y*wid)+x];
}
else {
drawing = 0;
}
}
}
}
/////////////////////////////////////////////////////////////