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Sansa e200v2: Some LCD driver changes (none with functional changes):

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1) put window addressing in a seperate function like on the fuze
2) use fb_data instead of unsigned short
3) change clipping a bit

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20051 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2009-02-19 20:40:00 +00:00
parent 807fd0d363
commit 1ad58f9757
1 changed files with 32 additions and 33 deletions
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65
firmware/target/arm/as3525/sansa-e200v2/lcd-e200v2.c
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@ -145,7 +145,7 @@ void lcd_write_data(const fb_data* p_bytes, int count)
static void lcd_write_reg(int reg, int value)
{
unsigned short data = value;
fb_data data = value;
lcd_write_cmd(reg);
lcd_write_data(&data, 1);
@ -363,6 +363,18 @@ void lcd_blit_yuv(unsigned char * const src[3],
(void)height;
}
static void lcd_window_x(int xmin, int xmax)
{
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (xmax << 8) | xmin);
}
static void lcd_window_y(int ymin, int ymax)
{
ymin += y_offset;
ymax += y_offset;
lcd_write_reg(R_VERT_RAM_ADDR_POS, (ymax << 8) | ymin);
lcd_write_reg(R_RAM_ADDR_SET, ymin << 8);
}
/* Update the display.
This must be called after all other LCD functions that change the display. */
void lcd_update(void)
@ -374,14 +386,12 @@ void lcd_update(void)
lcd_busy = true;
/* Set start position and window */
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (LCD_WIDTH-1) << 8);
lcd_write_reg(R_VERT_RAM_ADDR_POS,
((y_offset + LCD_HEIGHT-1) << 8) | y_offset);
lcd_write_reg(R_RAM_ADDR_SET, (y_offset) << 8);
lcd_window_x(0, LCD_WIDTH-1);
lcd_window_x(0, LCD_HEIGHT-1);
lcd_write_cmd(R_WRITE_DATA_2_GRAM);
lcd_write_data((unsigned short *)lcd_framebuffer, LCD_WIDTH*LCD_HEIGHT);
lcd_write_data((fb_data*)lcd_framebuffer, LCD_WIDTH*LCD_HEIGHT);
lcd_busy = false;
} /* lcd_update */
@ -390,46 +400,42 @@ void lcd_update(void)
/* Update a fraction of the display. */
void lcd_update_rect(int x, int y, int width, int height)
{
const fb_data *ptr;
int ymax;
const unsigned short *ptr;
if (!display_on)
return;
if (x + width > LCD_WIDTH)
width = LCD_WIDTH - x; /* Clip right */
if (x + width >= LCD_WIDTH)
width = LCD_WIDTH - x -1; /* Clip right */
if (x < 0)
width += x, x = 0; /* Clip left */
if (width <= 0)
return; /* nothing left to do */
ymax = y + height;
if (ymax > LCD_HEIGHT)
ymax = LCD_HEIGHT; /* Clip bottom */
if (y + height >= LCD_HEIGHT)
height = LCD_HEIGHT - y - 1; /* Clip bottom */
if (y < 0)
y = 0; /* Clip top */
if (y >= ymax)
height += y; y = 0; /* Clip top */
if (height <= 0)
return; /* nothing left to do */
ymax = y+height;
lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_HORZ);
lcd_busy = true;
/* Set start position and window */
lcd_write_reg(R_HORIZ_RAM_ADDR_POS,
((x + width-1) << 8) | x);
lcd_write_reg(R_VERT_RAM_ADDR_POS,
((y_offset + y + height - 1) << 8) | (y_offset + y));
lcd_write_reg(R_RAM_ADDR_SET, ((y + y_offset) << 8) | x);
lcd_write_cmd(R_WRITE_DATA_2_GRAM);
lcd_window_x(x, x + width);
lcd_window_y(y, ymax);
ptr = (unsigned short *)&lcd_framebuffer[y][x];
ptr = &lcd_framebuffer[y][x];
do
{
lcd_write_data(ptr, width);
ptr += LCD_WIDTH;
}
while (++y < ymax);
while (++y <= ymax);
lcd_busy = false;
} /* lcd_update_rect */
@ -437,25 +443,18 @@ void lcd_update_rect(int x, int y, int width, int height)
/* writes one read pixel outside the visible area, needed for correct dbop reads */
bool lcd_button_support(void)
{
int x=LCD_HEIGHT+1;
int y=LCD_WIDTH+1;
int width=1;
int height=1;
unsigned short data = (0xf<<12);
fb_data data = (0xf<<12);
if (lcd_busy)
return false;
lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_HORZ);
/* Set start position and window */
lcd_write_reg(R_HORIZ_RAM_ADDR_POS,
((x + width-1) << 8) | x);
lcd_write_reg(R_VERT_RAM_ADDR_POS,
((y_offset + y + height - 1) << 8) | (y_offset + y));
lcd_write_reg(R_RAM_ADDR_SET, ((y + y_offset) << 8) | x);
lcd_window_x(LCD_WIDTH+1, 1);
lcd_window_y(LCD_HEIGHT+1, 1);
lcd_write_cmd(R_WRITE_DATA_2_GRAM);
lcd_write_data(&data, width);
lcd_write_data(&data, 1);
return true;
}