mangavalk/lcdproc
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Only flush modified defined characters.

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This commit is contained in:
robijn
2002-01-14 21:50:48 +00:00
parent 92fb6382be
commit f244d66500
2 changed files with 86 additions and 13 deletions
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server/drivers/hd44780-low.h
+14
View File
@@ -29,6 +29,14 @@ enum ifWidth { IF_4bit, IF_8bit };
#define KEYPAD_MAXX 5
#define KEYPAD_MAXY 11
/* Constants for userdefchar_mode */
#define NUM_UDCs 8 /* number of characters */
#define UDCMODE_STANDARD 0 /* only char 0 is used for heartbeat */
#define UDCMODE_VBAR 1
#define UDCMODE_HBAR 2
#define UDCMODE_BIGNUM 3
#define UDCMODE_BIGCHAR 4
typedef struct ConnectionMapping {
char *name;
int (*init_fn) (Driver *drvthis);
@@ -48,6 +56,10 @@ typedef struct driver_private_data {
// For incremental updates store last lcd contents
char *lcd_contents;
// The defineable characters
char *udc_buf;
char *udc_dirty;
// Connection type data
int connectiontype_index;
struct hwDependentFns *hd44780_functions;
@@ -89,6 +101,8 @@ typedef struct driver_private_data {
int backlight_bit;
int udcmode;
} PrivateData;
// Structures holding pointers to HD44780 specific functions
server/drivers/hd44780.c
+72 -13
View File
@@ -72,6 +72,7 @@
#include "shared/str.h"
#include "lcd.h"
#include "hd44780.h"
#include "report.h"
#include "port.h"
#include "timing.h"
@@ -140,8 +141,9 @@ HD44780_init (Driver * drvthis, char *args)
// Clear data struct
memset( p, 0, sizeof(*p) );
p->cellheight = 8;
p->cellheight = 8; /* Do not change this !!! This is a controller property, not a display property !!! */
p->cellwidth = 5;
p->udcmode = UDCMODE_STANDARD;
//// READ THE CONFIG FILE
@@ -229,7 +231,16 @@ HD44780_init (Driver * drvthis, char *args)
if (!p->lcd_contents) {
return -1;
}
memset(p->lcd_contents, ' ', p->width * p->height);
memset(p->lcd_contents, 0, p->width * p->height);
// Allocate and clear the buffer for defineable characters
p->udc_buf = (unsigned char *) malloc (NUM_UDCs * p->cellheight);
p->udc_dirty = (unsigned char *) malloc (NUM_UDCs);
if (!p->udc_buf || !p->udc_dirty) {
return -1;
}
memset(p->udc_buf, 0, NUM_UDCs * p->cellheight);
memset(p->udc_dirty, 1, NUM_UDCs); /* all udcs dirty */
// Backlight ?
if ( p->have_backlight ) {
@@ -432,8 +443,12 @@ HD44780_flush (Driver *drvthis)
int wid = p->width;
char ch;
char drawing;
int row;
int i;
int count;
// Update LCD incrementally by comparing with last contents
count = 0;
for (y=0; y<p->height; y++) {
drawing = 0;
for (x=0 ; x<wid; x++) {
@@ -446,12 +461,35 @@ HD44780_flush (Driver *drvthis)
p->hd44780_functions->senddata (p, p->spanList[y], RS_DATA, HD44780_charmap[(unsigned char)ch]);
p->hd44780_functions->uPause (p, 40); // Minimum exec time for all commands
p->lcd_contents[(y*wid)+x] = ch;
count ++;
}
else {
drawing = 0;
}
}
}
debug( RPT_DEBUG, "HD44780: flushed %d chars", count );
/* Check which defineable chars we need to update */
count = 0;
for( i = 0; i < NUM_UDCs; i ++ ) {
if( p->udc_dirty[i] ) {
/* Tell the HD44780 we will redefine char number i */
p->hd44780_functions->senddata (p, 0, RS_INSTR, SETCHAR | i * 8);
p->hd44780_functions->uPause (p, 40); // Minimum exec time for all commands
/* Send the subsequent rows */
for (row = 0; row < p->cellheight; row++) {
p->hd44780_functions->senddata (p, 0, RS_DATA, p->udc_buf[i*p->cellheight+row]);
p->hd44780_functions->uPause (p, 40); /* Minimum exec time for all commands */
}
/* Mark as not dirty anymore */
p->udc_dirty[i] = 0;
count ++;
}
}
debug( RPT_DEBUG, "HD44780: flushed %d udc's", count );
}
/////////////////////////////////////////////////////////////////
@@ -462,6 +500,7 @@ HD44780_clear (Driver *drvthis)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
memset(p->framebuf, ' ', p->width * p->height);
p->udcmode = UDCMODE_STANDARD;
}
/////////////////////////////////////////////////////////////////
@@ -513,7 +552,7 @@ HD44780_backlight (Driver *drvthis, int on)
MODULE_EXPORT void
HD44780_init_vbar (Driver *drvthis)
{
//PrivateData *p = (PrivateData *) drvthis->private_data;
PrivateData *p = (PrivateData *) drvthis->private_data;
char a[] = {
0, 0, 0, 0, 0,
@@ -586,6 +625,18 @@ HD44780_init_vbar (Driver *drvthis)
1, 1, 1, 1, 1,
};
if( p->udcmode == UDCMODE_VBAR ) {
/* Work already done */
return;
}
if( p->udcmode != UDCMODE_STANDARD ) {
/* Not supported (yet) */
report( RPT_WARNING, "HD44780_init_vbar: Cannot combine two modes using user defined characters" );
return;
}
p->udcmode = UDCMODE_VBAR;
HD44780_set_char (drvthis, 1, a);
HD44780_set_char (drvthis, 2, b);
HD44780_set_char (drvthis, 3, c);
@@ -601,7 +652,7 @@ HD44780_init_vbar (Driver *drvthis)
MODULE_EXPORT void
HD44780_init_hbar (Driver *drvthis)
{
//PrivateData *p = (PrivateData *) drvthis->private_data;
PrivateData *p = (PrivateData *) drvthis->private_data;
char a[] = {
1, 0, 0, 0, 0,
@@ -644,6 +695,18 @@ HD44780_init_hbar (Driver *drvthis)
1, 1, 1, 1, 0,
};
if( p->udcmode == UDCMODE_HBAR ) {
/* Work already done */
return;
}
if( p->udcmode != UDCMODE_STANDARD ) {
/* Not supported (yet) */
report( RPT_WARNING, "HD44780_init_hbar: Cannot combine two modes using user defined characters" );
return;
}
p->udcmode = UDCMODE_HBAR;
HD44780_set_char (drvthis, 1, a);
HD44780_set_char (drvthis, 2, b);
HD44780_set_char (drvthis, 3, c);
@@ -698,7 +761,6 @@ HD44780_hbar (Driver *drvthis, int x, int y, int len)
MODULE_EXPORT void
HD44780_init_num (Driver *drvthis)
{
}
/////////////////////////////////////////////////////////////////
@@ -707,9 +769,6 @@ HD44780_init_num (Driver *drvthis)
MODULE_EXPORT void
HD44780_num (Driver *drvthis, int x, int num)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
int offset = p->width * ( p->height / 2 );
p->framebuf[x+offset] = num + '0';
}
/////////////////////////////////////////////////////////////
@@ -719,6 +778,7 @@ MODULE_EXPORT void
HD44780_heartbeat (Driver *drvthis, int type)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
static int timer = 0;
int whichIcon;
static int saved_type = HEARTBEAT_ON;
@@ -764,17 +824,16 @@ HD44780_set_char (Driver *drvthis, int n, char *dat)
if (!dat)
return;
p->hd44780_functions->senddata (p, 0, RS_INSTR, SETCHAR | n * 8);
p->hd44780_functions->uPause (p, 40); // Minimum exec time for all commands
for (row = 0; row < p->cellheight; row++) {
letter = 0;
for (col = 0; col < p->cellwidth; col++) {
letter <<= 1;
letter |= (dat[(row * p->cellwidth) + col] > 0);
}
p->hd44780_functions->senddata (p, 0, RS_DATA, letter);
p->hd44780_functions->uPause (p, 40); // Minimum exec time for all commands
if( p->udc_buf[n*p->cellheight+row] != letter ) {
p->udc_dirty[n] = 1; /* only mark as dirty if really different */
}
p->udc_buf[n*p->cellheight+row] = letter;
}
}