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Faster display updates on recorder, 36ms instead of 54ms

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@1441 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Linus Nielsen Feltzing 2002-07-25 06:32:23 +00:00
parent 86f7e93a2b
commit f8e017be8f
1 changed files with 96 additions and 7 deletions
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103
firmware/drivers/lcd.c
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@ -24,10 +24,12 @@
#include <string.h>
#include <stdlib.h>
#include "file.h"
#include "debug.h"
#include "system.h"
/*** definitions ***/
#define LCDR (PBDR+1)
#define LCDR (PBDR_ADDR+1)
/* PA14 : /LCD-BL --- backlight */
#define LCD_BL 6
@ -170,7 +172,7 @@ static int scroll_count = 0;
*
*/
#define ASM_IMPLEMENTATION
static void lcd_write(bool command, int byte)
@ -196,11 +198,12 @@ static void lcd_write(bool command, int byte)
:
: /* %0 */ "r"(((unsigned)byte)<<16),
/* %1 */ "r"(8),
/* %2 */ "I"(~(LCD_SC|LCD_SD)),
/* %2 */ "I"(~(LCD_SC|LCD_SD|LCD_DS)),
/* %3 */ "I"(LCD_SD),
/* %4 */ "I"(LCD_SC|LCD_DS),
/* %4 */ "I"(LCD_SC),
/* %5 */ "z"(LCDR));
else
#if 0
asm ("shll8 %0\n"
"0: \n\t"
"and.b %2, @(r0,gbr)\n\t"
@ -215,10 +218,69 @@ static void lcd_write(bool command, int byte)
:
: /* %0 */ "r"(((unsigned)byte)<<16),
/* %1 */ "r"(8),
/* %2 */ "I"(~(LCD_SC|LCD_DS|LCD_SD)),
/* %3 */ "I"(LCD_SD),
/* %4 */ "I"(LCD_SC),
/* %2 */ "I"(~(LCD_SC|LCD_SD)),
/* %3 */ "I"(LCD_SD|LCD_DS),
/* %4 */ "I"(LCD_SC|LCD_DS),
/* %5 */ "z"(LCDR));
#else
asm ("shll8 %0\n"
"0: \n\t"
"and.b %2, @(r0,gbr)\n\t"
"shll %0\n\t"
"bf 1f\n\t"
"or.b %3, @(r0,gbr)\n"
"1: \n\t"
"or.b %4, @(r0,gbr)\n"
"and.b %2, @(r0,gbr)\n\t"
"shll %0\n\t"
"bf 1f\n\t"
"or.b %3, @(r0,gbr)\n"
"1: \n\t"
"or.b %4, @(r0,gbr)\n"
"and.b %2, @(r0,gbr)\n\t"
"shll %0\n\t"
"bf 1f\n\t"
"or.b %3, @(r0,gbr)\n"
"1: \n\t"
"or.b %4, @(r0,gbr)\n"
"and.b %2, @(r0,gbr)\n\t"
"shll %0\n\t"
"bf 1f\n\t"
"or.b %3, @(r0,gbr)\n"
"1: \n\t"
"or.b %4, @(r0,gbr)\n"
"and.b %2, @(r0,gbr)\n\t"
"shll %0\n\t"
"bf 1f\n\t"
"or.b %3, @(r0,gbr)\n"
"1: \n\t"
"or.b %4, @(r0,gbr)\n"
"and.b %2, @(r0,gbr)\n\t"
"shll %0\n\t"
"bf 1f\n\t"
"or.b %3, @(r0,gbr)\n"
"1: \n\t"
"or.b %4, @(r0,gbr)\n"
"and.b %2, @(r0,gbr)\n\t"
"shll %0\n\t"
"bf 1f\n\t"
"or.b %3, @(r0,gbr)\n"
"1: \n\t"
"or.b %4, @(r0,gbr)\n"
"and.b %2, @(r0,gbr)\n\t"
"shll %0\n\t"
"bf 1f\n\t"
"or.b %3, @(r0,gbr)\n"
"1: \n\t"
"or.b %4, @(r0,gbr)\n"
:
: /* %0 */ "r"(((unsigned)byte)<<16),
/* %1 */ "r"(8),
/* %2 */ "I"(~(LCD_SC|LCD_SD)),
/* %3 */ "I"(LCD_SD|LCD_DS),
/* %4 */ "I"(LCD_SC|LCD_DS),
/* %5 */ "z"(LCDR));
#endif
asm("or.b %0, @(r0,gbr)"
:
@ -496,6 +558,17 @@ void lcd_init (void)
PBCR2 &= 0xff00; /* MD = 00 */
PBIOR |= 0x000f; /* IOR = 1 */
/* We are using timer 2 */
TSTR &= ~0x04; /* Stop the timer */
TSNC &= ~0x04; /* No synchronization */
TMDR &= ~0x04; /* Operate normally */
TCNT2 = 0; /* Start counting at 0 */
TCR2 = 0x03; /* sysclock/8 */
TSTR |= 0x04; /* Start timer 2 */
lcd_clear_display();
lcd_update();
create_thread(scroll_thread, scroll_stack,
@ -509,7 +582,15 @@ void lcd_init (void)
void lcd_update (void)
{
int x, y;
#ifdef DEBUG
int t1;
int t;
int i, d;
int tk1, tk2;
TCNT2 = 0;
tk1 = current_tick;
#endif
/* Copy display bitmap to hardware */
for (y = 0; y < LCD_HEIGHT/8; y++)
{
@ -520,6 +601,14 @@ void lcd_update (void)
for (x = 0; x < LCD_WIDTH; x++)
lcd_write (false, display[x][y]);
}
#ifdef DEBUG
tk2 = current_tick;
t1 = TCNT2;
t = (t1 * 10) / (FREQ/8000);
i = t / 10;
d = t % 10;
DEBUGF("TCNT2: %d, (%d.%d ms), %d\n", t1, i, d, tk2-tk1);
#endif
}
#endif /* SIMULATOR */