429 lines
14 KiB
C
429 lines
14 KiB
C
/****************************************************************************
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* arch/sim/src/up_lcd.c
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*
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* Copyright (C) 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include <nuttx/lcd/lcd.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* Check contrast selection */
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#if !defined(CONFIG_LCD_MAXCONTRAST)
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# define CONFIG_LCD_MAXCONTRAST 100
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#endif
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/* Check power setting */
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#if !defined(CONFIG_LCD_MAXPOWER)
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# define CONFIG_LCD_MAXPOWER 100
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#endif
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/* Simulated LCD geometry and color format */
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#ifndef CONFIG_SIM_FBWIDTH
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# define CONFIG_SIM_FBWIDTH 320 /* Framebuffer width in pixels */
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#endif
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#ifndef CONFIG_SIM_FBHEIGHT
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# define CONFIG_SIM_FBHEIGHT 240 /* Framebuffer height in pixels */
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#endif
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#ifndef CONFIG_SIM_FBBPP
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# define CONFIG_SIM_FBBPP 16 /* Framebuffer bytes per pixel (RGB) */
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#endif
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#define FB_STRIDE ((CONFIG_SIM_FBBPP * CONFIG_SIM_FBWIDTH + 7) >> 3)
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#undef CONFIG_SIM_FBFMT
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#if CONFIG_SIM_FBBPP == 1
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# define FB_FMT FB_FMT_RGB1
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#elif CONFIG_SIM_FBBPP == 4
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# define FB_FMT FB_FMT_RGB4
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#elif CONFIG_SIM_FBBPP == 8
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# define FB_FMT FB_FMT_RGB8
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#elif CONFIG_SIM_FBBPP == 16
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# define FB_FMT FB_FMT_RGB16_565
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#elif CONFIG_SIM_FBBPP == 24
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# define FB_FMT FB_FMT_RGB24
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#elif CONFIG_SIM_FBBPP == 32
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# define FB_FMT FB_FMT_RGB32
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#else
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# error "Unsupported BPP"
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#endif
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/* Debug ********************************************************************/
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/* Define CONFIG_DEBUG_LCD to enable detailed LCD debug output. Verbose debug must
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* also be enabled.
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*/
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#ifndef CONFIG_DEBUG
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# undef CONFIG_DEBUG_VERBOSE
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# undef CONFIG_DEBUG_GRAPHICS
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# undef CONFIG_DEBUG_LCD
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#endif
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#ifndef CONFIG_DEBUG_VERBOSE
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# undef CONFIG_DEBUG_LCD
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#endif
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#ifdef CONFIG_DEBUG_LCD
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# define lcddbg(format, arg...) vdbg(format, ##arg)
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#else
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# define lcddbg(x...)
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#endif
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/****************************************************************************
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* Private Type Definition
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****************************************************************************/
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/* This structure describes the state of this driver */
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struct sim_dev_s
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{
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/* Publically visible device structure */
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struct lcd_dev_s dev;
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/* Private LCD-specific information follows */
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uint8_t power; /* Current power setting */
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};
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/****************************************************************************
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* Private Function Protototypes
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****************************************************************************/
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/* LCD Data Transfer Methods */
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static int sim_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer,
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size_t npixels);
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static int sim_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer,
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size_t npixels);
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/* LCD Configuration */
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static int sim_getvideoinfo(FAR struct lcd_dev_s *dev,
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FAR struct fb_videoinfo_s *vinfo);
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static int sim_getplaneinfo(FAR struct lcd_dev_s *dev, unsigned int planeno,
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FAR struct lcd_planeinfo_s *pinfo);
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/* LCD RGB Mapping */
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#ifdef CONFIG_FB_CMAP
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# error "RGB color mapping not supported by this driver"
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#endif
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/* Cursor Controls */
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#ifdef CONFIG_FB_HWCURSOR
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# error "Cursor control not supported by this driver"
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#endif
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/* LCD Specific Controls */
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static int sim_getpower(struct lcd_dev_s *dev);
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static int sim_setpower(struct lcd_dev_s *dev, int power);
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static int sim_getcontrast(struct lcd_dev_s *dev);
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static int sim_setcontrast(struct lcd_dev_s *dev, unsigned int contrast);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* This is working memory allocated by the LCD driver for each LCD device
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* and for each color plane. This memory will hold one raster line of data.
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* The size of the allocated run buffer must therefore be at least
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* (bpp * xres / 8). Actual alignment of the buffer must conform to the
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* bitwidth of the underlying pixel type.
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*
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* If there are multiple planes, they may share the same working buffer
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* because different planes will not be operate on concurrently. However,
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* if there are multiple LCD devices, they must each have unique run buffers.
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*/
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static uint8_t g_runbuffer[FB_STRIDE];
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/* This structure describes the overall LCD video controller */
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static const struct fb_videoinfo_s g_videoinfo =
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{
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.fmt = FB_FMT, /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */
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.xres = CONFIG_SIM_FBWIDTH, /* Horizontal resolution in pixel columns */
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.yres = CONFIG_SIM_FBHEIGHT, /* Vertical resolution in pixel rows */
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.nplanes = 1, /* Number of color planes supported */
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};
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/* This is the standard, NuttX Plane information object */
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static const struct lcd_planeinfo_s g_planeinfo =
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{
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.putrun = sim_putrun, /* Put a run into LCD memory */
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.getrun = sim_getrun, /* Get a run from LCD memory */
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.buffer = (uint8_t*)g_runbuffer, /* Run scratch buffer */
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.bpp = CONFIG_SIM_FBBPP, /* Bits-per-pixel */
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};
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/* This is the standard, NuttX LCD driver object */
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static struct sim_dev_s g_lcddev =
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{
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.dev =
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{
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/* LCD Configuration */
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.getvideoinfo = sim_getvideoinfo,
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.getplaneinfo = sim_getplaneinfo,
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/* LCD RGB Mapping -- Not supported */
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/* Cursor Controls -- Not supported */
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/* LCD Specific Controls */
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.getpower = sim_getpower,
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.setpower = sim_setpower,
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.getcontrast = sim_getcontrast,
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.setcontrast = sim_setcontrast,
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},
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sim_putrun
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*
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* Description:
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* This method can be used to write a partial raster line to the LCD:
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*
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* row - Starting row to write to (range: 0 <= row < yres)
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* col - Starting column to write to (range: 0 <= col <= xres-npixels)
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* buffer - The buffer containing the run to be written to the LCD
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* npixels - The number of pixels to write to the LCD
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* (range: 0 < npixels <= xres-col)
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*
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****************************************************************************/
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static int sim_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer,
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size_t npixels)
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{
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lcddbg("row: %d col: %d npixels: %d\n", row, col, npixels);
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return OK;
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}
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/****************************************************************************
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* Name: sim_getrun
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*
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* Description:
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* This method can be used to read a partial raster line from the LCD:
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*
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* row - Starting row to read from (range: 0 <= row < yres)
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* col - Starting column to read read (range: 0 <= col <= xres-npixels)
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* buffer - The buffer in which to return the run read from the LCD
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* npixels - The number of pixels to read from the LCD
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* (range: 0 < npixels <= xres-col)
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*
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****************************************************************************/
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static int sim_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer,
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size_t npixels)
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{
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lcddbg("row: %d col: %d npixels: %d\n", row, col, npixels);
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return -ENOSYS;
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}
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/****************************************************************************
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* Name: sim_getvideoinfo
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*
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* Description:
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* Get information about the LCD video controller configuration.
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*
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****************************************************************************/
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static int sim_getvideoinfo(FAR struct lcd_dev_s *dev,
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FAR struct fb_videoinfo_s *vinfo)
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{
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DEBUGASSERT(dev && vinfo);
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gvdbg("fmt: %d xres: %d yres: %d nplanes: %d\n",
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g_videoinfo.fmt, g_videoinfo.xres, g_videoinfo.yres, g_videoinfo.nplanes);
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memcpy(vinfo, &g_videoinfo, sizeof(struct fb_videoinfo_s));
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return OK;
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}
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/****************************************************************************
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* Name: sim_getplaneinfo
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*
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* Description:
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* Get information about the configuration of each LCD color plane.
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*
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****************************************************************************/
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static int sim_getplaneinfo(FAR struct lcd_dev_s *dev, unsigned int planeno,
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FAR struct lcd_planeinfo_s *pinfo)
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{
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DEBUGASSERT(dev && pinfo && planeno == 0);
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gvdbg("planeno: %d bpp: %d\n", planeno, g_planeinfo.bpp);
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memcpy(pinfo, &g_planeinfo, sizeof(struct lcd_planeinfo_s));
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return OK;
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}
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/****************************************************************************
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* Name: sim_getpower
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*
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* Description:
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* Get the LCD panel power status (0: full off - CONFIG_LCD_MAXPOWER:
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* full on). On backlit LCDs, this setting may correspond to the backlight setting.
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*
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****************************************************************************/
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static int sim_getpower(struct lcd_dev_s *dev)
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{
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gvdbg("power: %d\n", 0);
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return g_lcddev.power;
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}
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/****************************************************************************
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* Name: sim_setpower
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*
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* Description:
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* Enable/disable LCD panel power (0: full off - CONFIG_LCD_MAXPOWER:
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* full on). On backlit LCDs, this setting may correspond to the backlight
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* setting.
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*
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****************************************************************************/
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static int sim_setpower(struct lcd_dev_s *dev, int power)
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{
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gvdbg("power: %d\n", power);
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DEBUGASSERT(power <= CONFIG_LCD_MAXPOWER);
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/* Set new power level */
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g_lcddev.power = power;
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return OK;
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}
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/****************************************************************************
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* Name: sim_getcontrast
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*
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* Description:
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* Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST).
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*
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****************************************************************************/
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static int sim_getcontrast(struct lcd_dev_s *dev)
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{
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gvdbg("Not implemented\n");
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return -ENOSYS;
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}
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/****************************************************************************
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* Name: sim_setcontrast
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*
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* Description:
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* Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST).
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*
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****************************************************************************/
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static int sim_setcontrast(struct lcd_dev_s *dev, unsigned int contrast)
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{
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gvdbg("contrast: %d\n", contrast);
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return -ENOSYS;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_lcdinitialize
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*
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* Description:
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* Initialize the LCD video hardware. The initial state of the LCD is
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* fully initialized, display memory cleared, and the LCD ready to use,
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* but with the power setting at 0 (full off).
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*
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****************************************************************************/
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int up_lcdinitialize(void)
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{
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gvdbg("Initializing\n");
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return OK;
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}
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/****************************************************************************
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* Name: up_lcdgetdev
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*
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* Description:
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* Return a a reference to the LCD object for the specified LCD. This
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* allows support for multiple LCD devices.
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*
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****************************************************************************/
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FAR struct lcd_dev_s *up_lcdgetdev(int lcddev)
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{
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DEBUGASSERT(lcddev == 0);
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return &g_lcddev.dev;
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}
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/****************************************************************************
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* Name: up_lcduninitialize
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*
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* Description:
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* Unitialize the LCD support
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*
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****************************************************************************/
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void up_lcduninitialize(void)
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{
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}
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