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iPod greyscale LCD driver: Slight speedup and correct greylevels for other targets than 1st/2nd gen. * Code cleanup.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14240 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2007-08-08 07:57:34 +00:00
parent d7d2e69092
commit 92abed78cc
1 changed files with 10 additions and 18 deletions
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24
firmware/target/arm/ipod/lcd-gray.c
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@ -30,27 +30,20 @@
#include "system.h" #include "system.h"
/* check if number of useconds has past */
static inline bool timer_check(int clock_start, int usecs)
{
return ((int)(USEC_TIMER - clock_start)) >= usecs;
}
/*** hardware configuration ***/ /*** hardware configuration ***/
#if CONFIG_CPU == PP5002 #if CONFIG_CPU == PP5002
#define IPOD_LCD_BASE 0xc0001000 #define IPOD_LCD_BASE 0xc0001000
#define IPOD_LCD_BUSY_MASK 0x80000000
#else /* PP502x */ #else /* PP502x */
#define IPOD_LCD_BASE 0x70003000 #define IPOD_LCD_BASE 0x70003000
#define IPOD_LCD_BUSY_MASK 0x00008000
#endif #endif
/* LCD command codes for HD66753 */ #define LCD_BUSY_MASK 0x00008000
#define LCD_CMD 0x08 #define LCD_CMD 0x08
#define LCD_DATA 0x10 #define LCD_DATA 0x10
/* LCD command codes for HD66753 */
#define R_START_OSC 0x00 #define R_START_OSC 0x00
#define R_DRV_OUTPUT_CONTROL 0x01 #define R_DRV_OUTPUT_CONTROL 0x01
#define R_DRV_WAVEFORM_CONTROL 0x02 #define R_DRV_WAVEFORM_CONTROL 0x02
@ -89,11 +82,10 @@ static const unsigned char dibits[16] ICONST_ATTR = {
/* wait for LCD with timeout */ /* wait for LCD with timeout */
static inline void lcd_wait_write(void) static inline void lcd_wait_write(void)
{ {
int start = USEC_TIMER; long timeout = USEC_TIMER + 1000; /* 1 ms */
do { while ((inl(IPOD_LCD_BASE) & LCD_BUSY_MASK)
if ((inl(IPOD_LCD_BASE) & 0x8000) == 0) break; && TIME_BEFORE(USEC_TIMER, timeout));
} while (timer_check(start, 1000) == 0);
} }
@ -199,9 +191,9 @@ void lcd_set_backlight_inversion(bool yesno)
void lcd_set_invert_display(bool yesno) void lcd_set_invert_display(bool yesno)
{ {
if (yesno) if (yesno)
lcd_cmd_and_data(R_DISPLAY_CONTROL, 0x0023); lcd_cmd_and_data(R_DISPLAY_CONTROL, 0x0017);
else else
lcd_cmd_and_data(R_DISPLAY_CONTROL, 0x0009); lcd_cmd_and_data(R_DISPLAY_CONTROL, 0x0015);
} }
#endif #endif