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Commit FS#10043 by Michael Chicoine for the Sansa e200v2. Implements LCD sleeping, cleans up unused GPIOs and implements LCD flipping/invert.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20670 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Giacomelli 2009-04-10 01:44:05 +00:00
parent 361f87f1c6
commit b94b12cd20
1 changed files with 37 additions and 30 deletions
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65
firmware/target/arm/as3525/sansa-e200v2/lcd-e200v2.c
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@ -84,9 +84,16 @@ static volatile bool lcd_busy = false;
#define R_HORIZ_RAM_ADDR_POS 0x44
#define R_VERT_RAM_ADDR_POS 0x45
#define R_ENTRY_MODE_HORZ 0x7030
#define R_ENTRY_MODE_HORZ_NORMAL 0x7030
#define R_ENTRY_MODE_HORZ_FLIPPED 0x7000
#define R_ENTRY_MODE_VERT 0x7038
#define R_ENTRY_MODE_SOLID_VERT 0x1038
static unsigned short r_entry_mode = R_ENTRY_MODE_HORZ_NORMAL;
/* Reverse Flag */
#define R_DISP_CONTROL_NORMAL 0x0004
#define R_DISP_CONTROL_REV 0x0000
static unsigned short r_disp_control_rev = R_DISP_CONTROL_NORMAL;
/* TODO: Implement this function */
static void lcd_delay(int x)
@ -160,32 +167,41 @@ void lcd_set_contrast(int val)
void lcd_set_invert_display(bool yesno)
{
(void)yesno;
}
r_disp_control_rev = yesno ? R_DISP_CONTROL_REV :
R_DISP_CONTROL_NORMAL;
static void flip_lcd(bool yesno)
{
(void)yesno;
}
if (display_on)
{
lcd_write_reg(R_DISP_CONTROL1, 0x0033 | r_disp_control_rev);
}
}
/* turn the display upside down (call lcd_update() afterwards) */
void lcd_set_flip(bool yesno)
{
display_flipped = yesno;
y_offset = yesno ? 4 : 0; /* FIXME: Is a y_offset needed? */
if (display_on)
flip_lcd(yesno);
r_entry_mode = yesno ? R_ENTRY_MODE_HORZ_FLIPPED :
R_ENTRY_MODE_HORZ_NORMAL;
}
static void lcd_window(int xmin, int ymin, int xmax, int ymax)
{
ymin += y_offset;
ymax += y_offset;
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (xmax << 8) | xmin);
lcd_write_reg(R_VERT_RAM_ADDR_POS, (ymax << 8) | ymin);
lcd_write_reg(R_RAM_ADDR_SET, (ymin << 8) | xmin);
if (!display_flipped)
{
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (xmax << 8) | xmin);
lcd_write_reg(R_VERT_RAM_ADDR_POS, (ymax << 8) | ymin);
lcd_write_reg(R_RAM_ADDR_SET, (ymin << 8) | xmin);
}
else
{
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, ((LCD_WIDTH-1 - xmin) << 8) | (LCD_WIDTH-1 - xmax));
lcd_write_reg(R_VERT_RAM_ADDR_POS, ((LCD_HEIGHT-1 - ymin) << 8) | (LCD_HEIGHT-1 - ymax));
lcd_write_reg(R_RAM_ADDR_SET, ((LCD_HEIGHT-1 - ymin) << 8) | (LCD_WIDTH-1 - xmin));
}
}
static void _display_on(void)
@ -205,13 +221,13 @@ static void _display_on(void)
/* Address counter updated in horizontal direction; left to right;
* vertical increment horizontal increment.
* data format for 8bit transfer or spi = 65k (5,6,5) */
lcd_write_reg(R_ENTRY_MODE, 0x0030);
lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
/* Replace data on writing to GRAM */
lcd_write_reg(R_COMPARE_REG1, 0);
lcd_write_reg(R_COMPARE_REG2, 0);
lcd_write_reg(R_DISP_CONTROL1, 0x0000); /* GON = 0, DTE = 0, D1-0 = 00b */
lcd_write_reg(R_DISP_CONTROL1, 0x0000 | r_disp_control_rev); /* GON = 0, DTE = 0, D1-0 = 00b */
/* Front porch lines: 2; Back porch lines: 2; */
lcd_write_reg(R_DISP_CONTROL2, 0x0203);
@ -285,7 +301,7 @@ static void _display_on(void)
lcd_write_reg(R_1ST_SCR_DRV_POS, (LCD_HEIGHT-1) << 8);
lcd_write_reg(R_2ND_SCR_DRV_POS, (LCD_HEIGHT-1) << 8);
lcd_write_reg(R_DISP_CONTROL1, 0x0037);
lcd_write_reg(R_DISP_CONTROL1, 0x0033 | r_disp_control_rev);
display_on=true; /* must be done before calling lcd_update() */
lcd_update();
@ -301,17 +317,8 @@ void lcd_init_device(void)
GPIOA_DIR |= (1<<5);
GPIOA_PIN(5) = 0;
GPIOA_PIN(3) = (1<<3);
GPIOA_DIR |= (3<<3);
GPIOA_PIN(3) = (1<<3);
GPIOA_PIN(4) = 0; /*c80b0040 := 0;*/
GPIOA_DIR |= (1<<7);
GPIOA_PIN(7) = 0;
lcd_delay(1);
GPIOA_PIN(5) = (1<<5);
@ -333,8 +340,8 @@ void lcd_enable(bool on)
}
else
{
/* TODO: Implement off sequence */
display_on=false;
lcd_write_reg(R_POWER_CONTROL1, 0x0001);
}
}
}
@ -375,7 +382,7 @@ void lcd_update(void)
if (!display_on)
return;
lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_HORZ);
lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
lcd_busy = true;
/* Set start position and window */
@ -417,7 +424,7 @@ void lcd_update_rect(int x, int y, int width, int height)
if (y >= ymax)
return; /* nothing left to do */
lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_HORZ);
lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
lcd_busy = true;
lcd_window(x, y, xmax, ymax);
lcd_write_cmd(R_WRITE_DATA_2_GRAM);
@ -442,7 +449,7 @@ bool lcd_button_support(void)
if (lcd_busy)
return false;
lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_HORZ);
lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
/* Set start position and window */
lcd_window(LCD_WIDTH+1, LCD_HEIGHT+1, LCD_WIDTH+2, LCD_HEIGHT+2);