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Get rid of disabling irq. Simply blocking does it too, it also caused problems (particulary with scrolling lines).

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20040 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2009-02-18 16:38:16 +00:00
parent 6a3779b543
commit 30255d53da
2 changed files with 26 additions and 21 deletions
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29
firmware/target/arm/as3525/sansa-e200v2/lcd-e200v2.c
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@ -36,6 +36,10 @@
static bool display_on = false; /* is the display turned on? */
static bool display_flipped = false;
static int y_offset = 0; /* needed for flip */
/* we need to write a red pixel for correct button reads
* (see lcd_button_support()), but that must not happen while the lcd is updating
* so block lcd_button_support the during updates */
static volatile bool lcd_busy = false;
/* register defines */
#define R_START_OSC 0x00
@ -365,12 +369,10 @@ void lcd_update(void)
{
if (!display_on)
return;
/* we must disable interrupts because buttondriver also writes to lcd */
disable_irq();
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, (LCD_WIDTH-1) << 8);
lcd_write_reg(R_VERT_RAM_ADDR_POS,
@ -381,7 +383,7 @@ void lcd_update(void)
lcd_write_data((unsigned short *)lcd_framebuffer, LCD_WIDTH*LCD_HEIGHT);
enable_irq();
lcd_busy = false;
} /* lcd_update */
@ -393,7 +395,7 @@ void lcd_update_rect(int x, int y, int width, int height)
if (!display_on)
return;
if (x + width > LCD_WIDTH)
width = LCD_WIDTH - x; /* Clip right */
if (x < 0)
@ -409,10 +411,8 @@ void lcd_update_rect(int x, int y, int width, int height)
if (y >= ymax)
return; /* nothing left to do */
/* we must disable interrupts because buttondriver also writes to lcd */
disable_irq();
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);
@ -430,8 +430,8 @@ void lcd_update_rect(int x, int y, int width, int height)
ptr += LCD_WIDTH;
}
while (++y < ymax);
enable_irq();
lcd_busy = false;
} /* lcd_update_rect */
/* writes one read pixel outside the visible area, needed for correct dbop reads */
@ -440,9 +440,12 @@ void lcd_button_support(void)
int x=LCD_HEIGHT+1;
int y=LCD_WIDTH+1;
int width=1;
int height=1;
int height=1;
unsigned short data = (0xf<<12);
if (lcd_busy)
return;
lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_HORZ);
/* Set start position and window */
lcd_write_reg(R_HORIZ_RAM_ADDR_POS,