len0rd/rockbox
1
0
Fork 1
mirror of https://github.com/Rockbox/rockbox.git synced 2025-12-08 12:45:26 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

Sansa c200v1 & c200v2 LCD: higher performance when writing pixels

Browse source 
c200v1: use a loop similar to r21320 and before to get almost the same performance (49.x fps while r21320 had 50.7 fps)
c200v2: better use of the DBOP fifo (taken from r21190) : 30% more fps
rename lcd_send_data to lcd_write_data now that it has the same prototype

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21427 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Rafaël Carré 2009-06-20 22:49:04 +00:00
parent 1f07151110
commit cb2c947b1b
1 changed files with 23 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

38
firmware/target/arm/lcd-c200_c200v2.c
View file

@ -78,15 +78,19 @@ static inline void lcd_wait_write(void)
}
/* send LCD data */
static void lcd_send_data(const fb_data *data, int width)
static void lcd_send_pixel(const fb_data data)
{
while(width--)
{
lcd_wait_write();
LCD1_DATA = *data >> 8;
lcd_wait_write();
LCD1_DATA = *data++ & 0xff;
}
lcd_wait_write();
LCD1_DATA = data >> 8;
lcd_wait_write();
LCD1_DATA = data & 0xff;
}
inline void lcd_write_data(const fb_data *data, int width)
{
do {
lcd_send_pixel(*data++);
} while(--width);
}
/* send LCD command */
@ -129,14 +133,18 @@ static inline void lcd_delay(int delay)
}
/* send LCD data */
static void lcd_send_data(const fb_data *data, int width)
void lcd_write_data(const fb_data *data, int width)
{
while(width--)
{
do {
DBOP_DOUT = *data << 8 | *data >> 8;
data++;
while ((DBOP_STAT & (1<<10)) == 0);
}
/* Wait if push fifo is full */
while ((DBOP_STAT & (1<<6)) != 0);
} while(--width);
/* While push fifo is not empty */
while ((DBOP_STAT & (1<<10)) == 0);
}
/* send LCD command */
@ -184,7 +192,7 @@ bool lcd_button_support(void)
lcd_send_command(R_Y_ADDR_AREA, 0);
lcd_send_command(1, 0);
lcd_send_data(&data, 1);
lcd_write_data(&data, 1);
return true;
}
@ -445,7 +453,7 @@ void lcd_update_rect(int x, int y, int width, int height)
lcd_send_command(y + height - 1 + 0x1a, 0);
do {
lcd_send_data(addr, width);
lcd_write_data(addr, width);
addr += LCD_WIDTH;
} while (--height > 0);