Hello everybody,
I've tried to use graphic window in the LCD controller built in the K70, but I have some troubles.
Screen in the graphic window is shifted by 1px (horizontally) and the last pixel of each line wrap around GW and appears at the start of the line.
Picture explains what I mean:
This problem doesn't depend on the size and position of the GW. It is not possible to eliminate it by address offset.
I use 800x480 24BPP display, but I've tested at 480x272 24 BPP display - same problem.
Here is my initialization of the LCDC, near standard code from Freescale examples:
void lcdc_init_screen()
{
int * pointer32;
int i;
LCDC_MemMapPtr lcd;
//Enable BL
lwgpio_init(&lcd_backlight, LCD_BACKLIGHT, LWGPIO_DIR_OUTPUT, LWGPIO_VALUE_NOCHANGE);
lwgpio_set_functionality(&lcd_backlight, LWGPIO_MUX_A11_GPIO);
lwgpio_set_value(&lcd_backlight, LWGPIO_VALUE_HIGH);
//Reset LCD
lwgpio_init(&lcd_reset, LCD_RESET, LWGPIO_DIR_OUTPUT, LWGPIO_VALUE_NOCHANGE);
lwgpio_set_functionality(&lcd_reset, LWGPIO_MUX_B16_GPIO);
/* Attempt reset */
lwgpio_set_value(&lcd_reset, LWGPIO_VALUE_LOW);
_time_delay_ticks (10);
/* Disable reset */
lwgpio_set_value(&lcd_reset, LWGPIO_VALUE_HIGH);
lcd = (LCDC_MemMapPtr) LCDC_BASE_PTR;
// set LCD Screen Start Address
lcd->LSSAR = FRAME_ADDR(0);
// set LCD Size. The XMAX bitfield is the screen x-size/16.
lcd->LSR = LCDC_LSR_XMAX( (SCREEN_XSIZE / 16) ) | LCDC_LSR_YMAX( SCREEN_YSIZE );
// set LCD virtual page width
lcd->LVPWR = LCDC_LVPWR_VPW (PAGE_XSIZE);
// set LCD cursor positon & settings (turn off)
lcd->LCPR = 0;
lcd->LCWHB = 0;
// set LCD panel configuration. Use endianess to work with TWR-LCD-RGB lines.
lcd->LPCR =
LCDC_LPCR_TFT_MASK | //TFT Screen
LCDC_LPCR_COLOR_MASK | //Color
LCDC_LPCR_BPIX(0x7) | //24 bpp
LCDC_LPCR_CLKPOL_MASK | //falling edge
LCDC_LPCR_FLMPOL_MASK | //first line marker active low
LCDC_LPCR_LPPOL_MASK | //line pulse active low
LCDC_LPCR_END_SEL_MASK | //Use big-endian mode (0xFFAA5500 means R=AA,G=55,B=00).
LCDC_LPCR_SWAP_SEL_MASK | //Set so that the LCD data lines match up correctly with the TWR-LCD-RGB
LCDC_LPCR_SCLKIDLE_MASK | //Enalbe LSCLK when vsync is idle
LCDC_LPCR_SCLKSEL_MASK | //Always enable clock
LCDC_LPCR_PCD(0x4); //Divide 150MHz PLL0 clock (default clock) by (4+1)=5 to get 30MHz clock
// set LCD horizontal configuration based on panel data (Figure 3-3 in Seiko datasheet)
lcd->LHCR =
LCDC_LHCR_H_WIDTH(19) | //(19+1)=20 SCLK period for HSYNC activated
LCDC_LHCR_H_WAIT_1(15) | //(15+1)=16 SCLK period between end of OE and beginning of HSYNC
LCDC_LHCR_H_WAIT_2(23); //(23+3)=26 SCLK periods between end of HSYNC and beginning of OE
// set LCD vertical configuration based on panel data (Figure 3-3 in Seiko datasheet)
lcd->LVCR =
LCDC_LVCR_V_WIDTH(10) | //15 SCLK period for VSYNC activated
LCDC_LVCR_V_WAIT_1(7) | //22 SCLK period between end of OE and beginning of VSYNC
LCDC_LVCR_V_WAIT_2(13); //15 SCLK periods between end of VSYNC and beginning of OE
// set the LCD panning offset (not used in 24bpp mode)
lcd->LPOR = 0;
// set LCD interrupt configuration register (interrupt on loading last data of frame from memory)
lcd->LICR = 0;
//Enable end of frame interrupts LCDC interrupts
lcd->LIER =
LCDC_LIER_EOF_EN_MASK;
//LCDC_LIER_GW_EOF_EN_MASK;
//Disable the graphic window. See the "color" and "fsl" demos for examples of
// using the graphic window feature
lcd->LGWCR &=~LCDC_LGWCR_GWE_MASK;
lcd->LDCR &= ~LCDC_LDCR_TM_MASK;
lcd->LDCR &= ~LCDC_LDCR_HM_MASK;
lcd->LDCR |= LCDC_LDCR_TM(0x7D);
lcd->LDCR |= LCDC_LDCR_HM(0x03);
//Set background plane DMA to burst mode
lcd->LDCR&=~LCDC_LDCR_BURST_MASK;
lcd->LGWDCR &= ~LCDC_LGWDCR_GWTM_MASK;
lcd->LGWDCR &= ~LCDC_LGWDCR_GWHM_MASK;
lcd->LGWDCR |= LCDC_LGWDCR_GWTM(0x7D);
lcd->LGWDCR |= LCDC_LGWDCR_GWHM(0x03);
//Set graphic window DMA to burst mode
lcd->LGWDCR&=~LCDC_LGWDCR_GWBT_MASK;
lcd->LGWSAR = GW_START_ADDRESS(0);
// set LCD graphic window size to be as big as the LCD display
lcd->LGWSR =
LCDC_LGWSR_GWW(GW_XSIZE/16) |
LCDC_LGWSR_GWH(GW_YSIZE);
// set LCD graphic window virtual page width
lcd->LGWVPWR = PAGE_XSIZE;
// set LCD graphic window panning offset
lcd->LGWPOR = 0;
// set LCD graphic window position to start in the upper left corner
lcd->LGWPR =
LCDC_LGWPR_GWXP(0) |
LCDC_LGWPR_GWYP(0);
// set LCD graphic window control
lcd->LGWCR =
LCDC_LGWCR_GWAV(0x00); //| // alpha-transparent (0xFF means opaque)
LCDC_LGWCR_GWE_MASK; // enable */
//set LCD cursor
lcd->LCPR = 0;
lcd->LCWHB =
LCDC_LCWHB_CH(26) |
LCDC_LCWHB_CW(1)|
LCDC_LCWHB_BD(20) |
LCDC_LCWHB_BK_EN_MASK;
lcd->LCCMR = 0;
//Start LCDC
SIM_MCR |= SIM_MCR_LCDSTART_MASK;
}
Thanks,
Slawek
