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|
/****************************************************************************
* arch/arm/src/sama5/sam_lcd.c
*
* Copyright (C) 2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/fb.h>
#include <arch/board/board.h>
#include "up_arch.h"
#include "chip/sam_syscon.h"
#include "sam_gpio.h"
#include "sam_lcd.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
#define SAM_LCD_CLK_PER_LINE \
(CONFIG_SAM_LCD_HWIDTH + CONFIG_SAM_LCD_HPULSE + \
CONFIG_SAM_LCD_HFRONTPORCH + CONFIG_SAM_LCD_HBACKPORCH)
#define SAM_LCD_LINES_PER_FRAME \
(CONFIG_SAM_LCD_VHEIGHT + CONFIG_SAM_LCD_VPULSE + \
CONFIG_SAM_LCD_VFRONTPORCH + CONFIG_SAM_LCD_VBACKPORCH)
#define SAM_LCD_PIXEL_CLOCK \
(SAM_LCD_CLK_PER_LINE * SAM_LCD_LINES_PER_FRAME * \
CONFIG_SAM_LCD_REFRESH_FREQ)
/* Framebuffer characteristics in bytes */
#if defined(CONFIG_SAM_LCD_BPP1)
# define SAM_STRIDE ((CONFIG_SAM_LCD_HWIDTH * 1 + 7) / 8)
#elif defined(CONFIG_SAM_LCD_BPP2)
# define SAM_STRIDE ((CONFIG_SAM_LCD_HWIDTH * 2 + 7) / 8)
#elif defined(CONFIG_SAM_LCD_BPP4)
# define SAM_STRIDE ((CONFIG_SAM_LCD_HWIDTH * 4 + 7) / 8)
#elif defined(CONFIG_SAM_LCD_BPP8)
# define SAM_STRIDE ((CONFIG_SAM_LCD_HWIDTH * 8 + 7) / 8)
#elif defined(CONFIG_SAM_LCD_BPP16)
# define SAM_STRIDE ((CONFIG_SAM_LCD_HWIDTH * 16 + 7) / 8)
#elif defined(CONFIG_SAM_LCD_BPP24)
# define SAM_STRIDE ((CONFIG_SAM_LCD_HWIDTH * 32 + 7) / 8)
#elif defined(CONFIG_SAM_LCD_BPP16_565)
# define SAM_STRIDE ((CONFIG_SAM_LCD_HWIDTH * 16 + 7) / 8)
#else /* defined(CONFIG_SAM_LCD_BPP12_444) */
# define SAM_STRIDE ((CONFIG_SAM_LCD_HWIDTH * 16 + 7) / 8)
#endif
#define SAM_FBSIZE (SAM_STRIDE * CONFIG_SAM_LCD_VHEIGHT)
/* Delays */
#define SAM_LCD_PWRDIS_DELAY 10000
#define SAM_LCD_PWREN_DELAY 10000
/****************************************************************************
* Private Types
****************************************************************************/
/* This structure provides the overall state of the LCDC */
struct sam_lcdc_s
{
struct fb_vtable_s fboject; /* The framebuffer object */
#ifdef CONFIG_FB_HWCURSOR
struct fb_cursorpos_s cpos; /* Current cursor position */
#ifdef CONFIG_FB_HWCURSORSIZE
struct fb_cursorsize_s csize; /* Current cursor size */
#endif
#endif
/* Debug stuff */
#ifdef CONFIG_SAMA5_GMAC_REGDEBUG
bool wrlast; /* True: Last access was a write */
uintptr_t addrlast; /* Last address accessed */
uint32_t vallast; /* Last value read or written */
int ntimes; /* Number of consecutive accesses */
#endif
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* Register operations ******************************************************/
#if defined(CONFIG_SAMA5_LCDC_REGDEBUG) && defined(CONFIG_DEBUG)
static bool sam_checkreg(bool wr, uint32_t regval, uintptr_t address);
static uint32_t sam_getreg(uintptr_t addr);
static void sam_putreg(uintptr_t addr, uint32_t val);
#else
# define sam_getreg(addr) getreg32(addr)
# define sam_putreg(addr,val) putreg32(val,addr)
#endif
/* Get information about the video controller configuration and the
* configuration of each color plane.
*/
static int sam_getvideoinfo(FAR struct fb_vtable_s *vtable,
FAR struct fb_videoinfo_s *vinfo);
static int sam_getplaneinfo(FAR struct fb_vtable_s *vtable, int planeno,
FAR struct fb_planeinfo_s *pinfo);
/* The following is provided only if the video hardware supports RGB color
* mapping
*/
#ifdef CONFIG_FB_CMAP
static int sam_getcmap(FAR struct fb_vtable_s *vtable,
FAR struct fb_cmap_s *cmap);
static int sam_putcmap(FAR struct fb_vtable_s *vtable,
FAR const struct fb_cmap_s *cmap);
#endif
/* The following is provided only if the video hardware supports a hardware
* cursor
*/
#ifdef CONFIG_FB_HWCURSOR
static int sam_getcursor(FAR struct fb_vtable_s *vtable,
FAR struct fb_cursorattrib_s *attrib);
static int sam_setcursor(FAR struct fb_vtable_s *vtable,
FAR struct fb_setcursor_s *setttings);
#endif
/****************************************************************************
* Private Data
****************************************************************************/
/* This structure describes the simulated video controller */
static const struct fb_videoinfo_s g_videoinfo =
{
.fmt = SAM_COLOR_FMT,
.xres = CONFIG_SAM_LCD_HWIDTH,
.yres = CONFIG_SAM_LCD_VHEIGHT,
.nplanes = 1,
};
/* This structure describes the single, simulated color plane */
static const struct fb_planeinfo_s g_planeinfo =
{
.fbmem = (FAR void *)CONFIG_SAM_LCD_VRAMBASE,
.fblen = SAM_FBSIZE,
.stride = SAM_STRIDE,
.bpp = SAM_BPP,
};
/* This structure provides the overall state of the LCDC */
struct sam_lcdc_s g_lcdc;
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: sam_checkreg
*
* Description:
* Check if the current register access is a duplicate of the preceding.
*
* Input Parameters:
* regval - The value to be written
* address - The address of the register to write to
*
* Returned Value:
* true: This is the first register access of this type.
* flase: This is the same as the preceding register access.
*
****************************************************************************/
#ifdef CONFIG_SAMA5_LCDC_REGDEBUG
static bool sam_checkreg(bool wr, uint32_t regval, uintptr_t address)
{
if (wr == g_lcdc.wrlast && /* Same kind of access? */
regval == g_lcdc.vallast && /* Same value? */
address == g_lcdc.addrlast) /* Same address? */
{
/* Yes, then just keep a count of the number of times we did this. */
g_lcdc.ntimes++;
return false;
}
else
{
/* Did we do the previous operation more than once? */
if (g_lcdc.ntimes > 0)
{
/* Yes... show how many times we did it */
lldbg("...[Repeats %d times]...\n", g_lcdc.ntimes);
}
/* Save information about the new access */
g_lcdc.wrlast = wr;
g_lcdc.vallast = regval;
g_lcdc.addrlast = address;
g_lcdc.ntimes = 0;
}
/* Return true if this is the first time that we have done this operation */
return true;
}
#endif
/****************************************************************************
* Name: sam_getreg
*
* Description:
* Read any 32-bit register using an absolute
*
****************************************************************************/
#ifdef CONFIG_SAMA5_LCDC_REGDEBUG
static uint32_t sam_getreg(uintptr_t address)
{
uint32_t regval = getreg32(address);
if (sam_checkreg(false, regval, address))
{
lldbg("%08x->%08x\n", address, regval);
}
return regval;
}
#endif
/****************************************************************************
* Name: sam_putreg
*
* Description:
* Write to any 32-bit register using an absolute address
*
****************************************************************************/
#ifdef CONFIG_SAMA5_LCDC_REGDEBUG
static void sam_putreg(uintptr_t address, uint32_t regval)
{
if (sam_checkreg(true, regval, address))
{
lldbg("%08x<-%08x\n", address, regval);
}
putreg32(regval, address);
}
#endif
/****************************************************************************
* Name: sam_getvideoinfo
****************************************************************************/
static int sam_getvideoinfo(FAR struct fb_vtable_s *vtable,
FAR struct fb_videoinfo_s *vinfo)
{
gvdbg("vtable=%p vinfo=%p\n", vtable, vinfo);
if (vtable && vinfo)
{
memcpy(vinfo, &g_videoinfo, sizeof(struct fb_videoinfo_s));
return OK;
}
gdbg("Returning EINVAL\n");
return -EINVAL;
}
/****************************************************************************
* Name: sam_getplaneinfo
****************************************************************************/
static int sam_getplaneinfo(FAR struct fb_vtable_s *vtable, int planeno,
FAR struct fb_planeinfo_s *pinfo)
{
gvdbg("vtable=%p planeno=%d pinfo=%p\n", vtable, planeno, pinfo);
if (vtable && planeno == 0 && pinfo)
{
memcpy(pinfo, &g_planeinfo, sizeof(struct fb_planeinfo_s));
return OK;
}
gdbg("Returning EINVAL\n");
return -EINVAL;
}
/****************************************************************************
* Name: sam_getcmap
****************************************************************************/
#ifdef CONFIG_FB_CMAP
static int sam_getcmap(FAR struct fb_vtable_s *vtable,
FAR struct fb_cmap_s *cmap)
{
uint32_t *pal;
uint32_t rgb;
int last;
int i;
gvdbg("vtable=%p cmap=%p first=%d len=%d\n",
vtable, cmap, cmap->first, cmap->len);
DEBUGASSERT(vtable && cmap &&
cmap->first < 256 && (cmap->first + cmap->len) < 256);
pal = (uint32_t *)SAM_LCD_PAL(cmap->first >> 1);
last = cmap->first + cmap->len;
/* Handle the case where the first color starts on an odd boundary */
i = cmap->first;
if ((i & 1) != 0)
{
rgb = *pal++;
i++;
/* Save the odd palette value */
cmap->red[i] = (rgb & LCD_PAL_R1_MASK) >> LCD_PAL_R1_SHIFT;
cmap->green[i] = (rgb & LCD_PAL_G1_MASK) >> LCD_PAL_G1_SHIFT;
cmap->blue[i] = (rgb & LCD_PAL_B1_MASK) >> LCD_PAL_B1_SHIFT;
#ifdef CONFIG_FB_TRANSPARENCY
cmap->transp[i] = 0;
#endif
}
/* Handle even colors */
for (; i < last; i += 2)
{
rgb = *pal++;
/* Save the even palette value */
cmap->red[i] = (rgb & LCD_PAL_R0_MASK) >> LCD_PAL_R0_SHIFT;
cmap->green[i] = (rgb & LCD_PAL_G0_MASK) >> LCD_PAL_G0_SHIFT;
cmap->blue[i] = (rgb & LCD_PAL_B0_MASK) >> LCD_PAL_B0_SHIFT;
#ifdef CONFIG_FB_TRANSPARENCY
cmap->transp[i] = 0;
#endif
/* Handle the case where the len ends on an odd boudary */
if ((i + 1) < last)
{
/* Save the even palette value */
cmap->red[i+1] = (rgb & LCD_PAL_R1_MASK) >> LCD_PAL_R1_SHIFT;
cmap->green[i+1] = (rgb & LCD_PAL_G1_MASK) >> LCD_PAL_G1_SHIFT;
cmap->blue[i+1] = (rgb & LCD_PAL_B1_MASK) >> LCD_PAL_B1_SHIFT;
#ifdef CONFIG_FB_TRANSPARENCY
cmap->transp[i+1] = 0;
#endif
}
}
return OK;
}
#endif
/****************************************************************************
* Name: sam_putcmap
****************************************************************************/
#ifdef CONFIG_FB_CMAP
static int sam_putcmap(FAR struct fb_vtable_s *vtable,
FAR const struct fb_cmap_s *cmap)
{
uint32_t *pal;
uint32_t rgb0;
uint32_t rgb1;
int last;
int i;
gvdbg("vtable=%p cmap=%p first=%d len=%d\n",
vtable, cmap, cmap->first, cmap->len);
DEBUGASSERT(vtable && cmap);
pal = (uint32_t *)SAM_LCD_PAL(cmap->first >> 1);
last = cmap->first + cmap->len;
/* Handle the case where the first color starts on an odd boundary */
i = cmap->first;
if ((i & 1) != 0)
{
rgb0 = *pal;
rgb0 &= (LCD_PAL_R0_MASK | LCD_PAL_G0_MASK | LCD_PAL_B0_MASK | LCD_PAL_I0);
rgb1 |= ((uint32_t)cmap->red[i] << LCD_PAL_R0_SHIFT |
(uint32_t)cmap->green[i] << LCD_PAL_G0_SHIFT |
(uint32_t)cmap->blue[i] << LCD_PAL_B0_SHIFT);
/* Save the new palette value */
*pal++ = (rgb0 | rgb1);
i++;
}
/* Handle even colors */
for (; i < last; i += 2)
{
uint32_t rgb0 = ((uint32_t)cmap->red[i] << LCD_PAL_R0_SHIFT |
(uint32_t)cmap->green[i] << LCD_PAL_G0_SHIFT |
(uint32_t)cmap->blue[i] << LCD_PAL_B0_SHIFT);
/* Handle the case where the len ends on an odd boudary */
if ((i + 1) >= last)
{
rgb1 = *pal;
rgb1 &= (LCD_PAL_R1_MASK | LCD_PAL_G1_MASK | LCD_PAL_B1_MASK | LCD_PAL_I1);
}
else
{
rgb1 = ((uint32_t)cmap->red[i+1] << LCD_PAL_R1_SHIFT |
(uint32_t)cmap->green[i+1] << LCD_PAL_G1_SHIFT |
(uint32_t)cmap->blue[i+1] << LCD_PAL_B1_SHIFT);
}
/* Save the new pallete value */
*pal++ = (rgb0 | rgb1);
}
return OK;
}
#endif
/****************************************************************************
* Name: sam_getcursor
****************************************************************************/
#ifdef CONFIG_FB_HWCURSOR
static int sam_getcursor(FAR struct fb_vtable_s *vtable,
FAR struct fb_cursorattrib_s *attrib)
{
gvdbg("vtable=%p attrib=%p\n", vtable, attrib);
if (vtable && attrib)
{
#ifdef CONFIG_FB_HWCURSORIMAGE
attrib->fmt = SAM_COLOR_FMT;
#endif
gvdbg("pos: (x=%d, y=%d)\n", g_lcdc.cpos.x, g_lcdc.cpos.y);
attrib->pos = g_lcdc.cpos;
#ifdef CONFIG_FB_HWCURSORSIZE
attrib->mxsize.h = CONFIG_SAM_LCD_VHEIGHT;
attrib->mxsize.w = CONFIG_SAM_LCD_HWIDTH;
gvdbg("size: (h=%d, w=%d)\n", g_lcdc.csize.h, g_lcdc.csize.w);
attrib->size = g_lcdc.csize;
#endif
return OK;
}
gdbg("Returning EINVAL\n");
return -EINVAL;
}
#endif
/****************************************************************************
* Name: sam_setcursor
****************************************************************************/
#ifdef CONFIG_FB_HWCURSOR
static int sam_setcursor(FAR struct fb_vtable_s *vtable,
FAR struct fb_setcursor_s *setttings)
{
gvdbg("vtable=%p setttings=%p\n", vtable, setttings);
if (vtable && setttings)
{
gvdbg("flags: %02x\n", settings->flags);
if ((flags & FB_CUR_SETPOSITION) != 0)
{
g_lcdc.cpos = settings->pos;
gvdbg("pos: (h:%d, w:%d)\n", g_lcdc.cpos.x, g_lcdc.cpos.y);
}
#ifdef CONFIG_FB_HWCURSORSIZE
if ((flags & FB_CUR_SETSIZE) != 0)
{
g_lcdc.csize = settings->size;
gvdbg("size: (h:%d, w:%d)\n", g_lcdc.csize.h, g_lcdc.csize.w);
}
#endif
#ifdef CONFIG_FB_HWCURSORIMAGE
if ((flags & FB_CUR_SETIMAGE) != 0)
{
gvdbg("image: (h:%d, w:%d) @ %p\n",
settings->img.height, settings->img.width,
settings->img.image);
}
#endif
return OK;
}
gdbg("Returning EINVAL\n");
return -EINVAL;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: sam_fbinitialize
*
* Description:
* Initialize the framebuffer video hardware
*
****************************************************************************/
int up_fbinitialize(void)
{
uint32_t regval;
int i;
gvdbg("Entry\n");
/* Configure PIO pins */
/* Video data */
gvdbg("Configuring pins\n");
sam_configgpio(GPIO_LCD_VD0);
sam_configgpio(GPIO_LCD_VD1);
sam_configgpio(GPIO_LCD_VD2);
sam_configgpio(GPIO_LCD_VD3);
sam_configgpio(GPIO_LCD_VD4);
sam_configgpio(GPIO_LCD_VD5);
sam_configgpio(GPIO_LCD_VD6);
sam_configgpio(GPIO_LCD_VD7);
sam_configgpio(GPIO_LCD_VD8);
sam_configgpio(GPIO_LCD_VD9);
sam_configgpio(GPIO_LCD_VD10);
sam_configgpio(GPIO_LCD_VD11);
sam_configgpio(GPIO_LCD_VD12);
sam_configgpio(GPIO_LCD_VD13);
sam_configgpio(GPIO_LCD_VD14);
sam_configgpio(GPIO_LCD_VD15);
#if SAM_BPP > 16
sam_configgpio(GPIO_LCD_VD16);
sam_configgpio(GPIO_LCD_VD17);
sam_configgpio(GPIO_LCD_VD18);
sam_configgpio(GPIO_LCD_VD19);
sam_configgpio(GPIO_LCD_VD20);
sam_configgpio(GPIO_LCD_VD21);
sam_configgpio(GPIO_LCD_VD22);
sam_configgpio(GPIO_LCD_VD23);
#endif
/* Other pins */
sam_configgpio(GPIO_LCD_DCLK);
sam_configgpio(GPIO_LCD_LP);
sam_configgpio(GPIO_LCD_FP);
sam_configgpio(GPIO_LCD_ENABM);
sam_configgpio(GPIO_LCD_PWR);
/* Turn on LCD clock */
#warning Missing lobi
gvdbg("Configuring the LCD controller\n");
/* Disable the cursor */
#warning Missing logic
/* Clear any pending interrupts */
#warning Missing logic
/* Disable LCDC controller */
#warning Missing logic
/* Initialize pixel clock */
#warning Missing logic
/* Set the bits per pixel */
#warning Missing logic
#if defined(CONFIG_SAM_LCD_BPP1)
# warning Missing logic /* 1 bpp */
#elif defined(CONFIG_SAM_LCD_BPP2)
# warning Missing logic /* 2 bpp */
#elif defined(CONFIG_SAM_LCD_BPP4)
# warning Missing logic /* 4 bpp */
#elif defined(CONFIG_SAM_LCD_BPP8)
# warning Missing logic /* 8 bpp */
#elif defined(CONFIG_SAM_LCD_BPP16)
# warning Missing logic /* 16 bpp */
#elif defined(CONFIG_SAM_LCD_BPP24)
# warning Missing logic /* 24-bit TFT panel only */
#elif defined(CONFIG_SAM_LCD_BPP16_565)
# warning Missing logic /* 16 bpp, 5:6:5 mode */
#else /* defined(CONFIG_SAM_LCD_BPP12_444) */
# warning Missing logic /* 12 bpp, 4:4:4 mode */
#endif
/* TFT panel */
#warning Missing logic
/* Select monochrome or color LCD */
#ifdef CONFIG_SAM_LCD_MONOCHROME
#warning Missing logic
#else
/* Select color LCD */
#warning Missing logic
#endif /* CONFIG_SAM_LCD_MONOCHROME */
/* Initialize horizontal timing */
#warning Missing logic
/* Initialize vertical timing */
#warning Missing logic
/* Initialize clock and signal polarity */
#warning Missing logic
/* Clear the display */
#warning Missing logic
sam_lcdclear(CONFIG_SAM_LCD_BACKCOLOR);
#ifdef CONFIG_SAM_LCD_BACKLIGHT
/* Turn on the back light */
sam_backlight(true);
#endif
/* Enable LCD */
gvdbg("Enabling the display\n");
#warning Missing logic
/* Enable LCD power */
#warning Missing logic
return OK;
}
/****************************************************************************
* Name: sam_fbgetvplane
*
* Description:
* Return a a reference to the framebuffer object for the specified video
* plane.
*
* Input parameters:
* None
*
* Returned value:
* Reference to the framebuffer object (NULL on failure)
*
***************************************************************************/
FAR struct fb_vtable_s *up_fbgetvplane(int vplane)
{
gvdbg("vplane: %d\n", vplane);
if (vplane == 0)
{
return &g_lcdc.fboject;
}
else
{
return NULL;
}
}
/****************************************************************************
* Name: sam_fbinitialize
*
* Description:
* Unitialize the framebuffer support
*
****************************************************************************/
void fb_uninitialize(void)
{
uint32_t regval;
int i;
/* We assume there is only one use of the LCD and so we do not need to
* worry about mutually exclusive access to the LCD hardware.
*/
#ifdef CONFIG_SAM_LCD_BACKLIGHT
/* Turn off the back light */
sam_backlight(false);
#endif
/* Disable the LCD controller */
#warning Missing logic
/* Initialize the g_lcdc data structure */
g_lcdc.fbobject.getvideoinfo = sam_getvideoinfo;
g_lcdc.fbobject.getplaneinfo = sam_getplaneinfo;
#ifdef CONFIG_FB_CMAP
g_lcdc.fbobject.getcmap = sam_getcmap;
g_lcdc.fbobject.putcmap = sam_putcmap;
#endif
#ifdef CONFIG_FB_HWCURSOR
g_lcdc.fbobject.getcursor = sam_getcursor;
g_lcdc.fbobject.setcursor = sam_setcursor;
#endif
/* Turn off clocking to the LCD. modifyreg32() can do this atomically. */
modifyreg32(SAM_SYSCON_PCONP, SYSCON_PCONP_PCLCD, 0);
return OK;
}
/************************************************************************************
* Name: sam_lcdclear
*
* Description:
* This is a non-standard LCD interface just for the SAMA5. Clearing the display
* in the normal way by writing a sequences of runs that covers the entire display
* can be slow. Here the display is cleared by simply setting all VRAM memory to
* the specified color.
*
************************************************************************************/
void sam_lcdclear(nxgl_mxpixel_t color)
{
int i;
#if SAM_BPP > 16
uint32_t *dest = (uint32_t*)CONFIG_SAM_LCD_VRAMBASE;
gvdbg("Clearing display: color=%08x VRAM=%08x size=%d\n",
color, CONFIG_SAM_LCD_VRAMBASE,
CONFIG_SAM_LCD_HWIDTH * CONFIG_SAM_LCD_VHEIGHT * sizeof(uint32_t));
#else
uint16_t *dest = (uint16_t*)CONFIG_SAM_LCD_VRAMBASE;
gvdbg("Clearing display: color=%08x VRAM=%08x size=%d\n",
color, CONFIG_SAM_LCD_VRAMBASE,
CONFIG_SAM_LCD_HWIDTH * CONFIG_SAM_LCD_VHEIGHT * sizeof(uint16_t));
#endif
for (i = 0; i < (CONFIG_SAM_LCD_HWIDTH * CONFIG_SAM_LCD_VHEIGHT); i++)
{
*dest++ = color;
}
}
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