269 lines
9.6 KiB
C
269 lines
9.6 KiB
C
/****************************************************************************
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* include/nuttx/lcd/lcd.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __INCLUDE_NUTTX_LCD_LCD_H
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#define __INCLUDE_NUTTX_LCD_LCD_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <sys/types.h>
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#include <stdint.h>
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#include <nuttx/video/fb.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Friendlier names */
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#define LCD_FULL_OFF (0)
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#define LCD_FULL_ON CONFIG_LCD_MAXPOWER
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#define LCD_MIN_CONTRAST (0)
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#define LCD_MAX_CONTRAST CONFIG_LCD_MAXCONTRAST
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/****************************************************************************
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* Type Definitions
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****************************************************************************/
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struct lcd_dev_s;
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/* This structure describes one color plane. Some YUV formats may support
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* up to 4 planes (although they probably wouldn't be used on LCD hardware).
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* The framebuffer driver provides the video memory address in its
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* corresponding fb_planeinfo_s structure. The LCD driver, instead, provides
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* methods to transfer data to/from the LCD color plane.
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*/
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struct lcd_planeinfo_s
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{
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/* LCD Data Transfer ******************************************************/
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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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* dev - LCD interface to write to
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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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int (*putrun)(FAR struct lcd_dev_s *dev, fb_coord_t row, fb_coord_t col,
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FAR const uint8_t *buffer, size_t npixels);
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/* This method can be used to write a rectangular area to the LCD:
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*
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* dev - LCD interface to write to
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* row_start - Starting row to write to (range: 0 <= row < yres)
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* row_end - Ending row to write to (range: row_start <= row < yres)
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* col_start - Starting column to write to (range: 0 <= col <= xres)
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* col_end - Ending column to write to
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* (range: col_start <= col_end < xres)
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* buffer - The buffer containing the area to be written to the LCD
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* stride - Length of a line in bytes. This parameter may be necessary
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* to allow the LCD driver to calculate the offset for partial
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* writes when the buffer needs to be splited for row-by-row
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* writing.
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*
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* NOTE: this operation may not be supported by the device, in which case
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* the callback pointer will be NULL. In that case, putrun() should be
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* used.
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*/
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int (*putarea)(FAR struct lcd_dev_s *dev, fb_coord_t row_start,
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fb_coord_t row_end, fb_coord_t col_start,
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fb_coord_t col_end, FAR const uint8_t *buffer,
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fb_coord_t stride);
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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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* dev - LCD interface to read from
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* row - Starting row to read from (range: 0 <= row < yres)
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* col - Starting column to read read
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* (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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int (*getrun)(FAR struct lcd_dev_s *dev, fb_coord_t row,
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fb_coord_t col, FAR uint8_t *buffer, size_t npixels);
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/* This method can be used to read a rectangular area from the LCD:
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*
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* dev - LCD interface to read from
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* row_start - Starting row to read from (range: 0 <= row < yres)
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* row_end - Ending row to read from (range: row_start <= row < yres)
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* col_start - Starting column to read from (range: 0 <= col <= xres)
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* col_end - Ending column to read from
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* (range: col_start <= col_end < xres)
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* buffer - The buffer where the data will be written
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* stride - Length of a line in bytes.
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*
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* NOTE: this operation may not be supported by the device, in which case
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* the callback pointer will be NULL. In that case, getrun() should be
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* used.
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*/
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int (*getarea)(FAR struct lcd_dev_s *dev, fb_coord_t row_start,
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fb_coord_t row_end, fb_coord_t col_start,
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fb_coord_t col_end, FAR uint8_t *buffer,
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fb_coord_t stride);
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/* This method can be used to redraw display's content.
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*
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* dev - LCD interface to redraw its memory content
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*
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* NOTE: In case of non e-ink dispalys redrawing is cheap and can be done
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* after each memory modification. Redrawing e-ink display is time and
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* energy consuming.
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* In order to avoid such operation (time and energy consumption) we can
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* implement callback function putrun without redrawing the screen.
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* Function putrun is called many times unless the function putarea is
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* implemented.
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*/
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int (*redraw)(FAR struct lcd_dev_s *dev);
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/* Plane color characteristics ********************************************/
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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
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* data. 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
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* buffers.
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*/
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FAR uint8_t *buffer;
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/* This is the number of bits in one pixel. This may be one of {1, 2, 4,
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* 8, 16, 24, or 32} unless support for one or more of those resolutions
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* has been disabled.
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*/
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uint8_t bpp;
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/* This is the LCD interface corresponding to which this color plane
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* belongs.
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*/
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FAR struct lcd_dev_s *dev;
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};
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/* This structure defines an LCD interface */
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struct lcd_dev_s
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{
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/* LCD Configuration ******************************************************/
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/* Get information about the LCD video controller configuration and the
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* configuration of each LCD color plane.
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*/
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int (*getvideoinfo)(FAR struct lcd_dev_s *dev,
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FAR struct fb_videoinfo_s *vinfo);
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int (*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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/* The following are provided only if the video hardware supports RGB color
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* mapping
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*/
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#ifdef CONFIG_FB_CMAP
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int (*getcmap)(FAR struct lcd_dev_s *dev, FAR struct fb_cmap_s *cmap);
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int (*putcmap)(FAR struct lcd_dev_s *dev,
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FAR const struct fb_cmap_s *cmap);
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#endif
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/* Cursor Controls ********************************************************/
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/* The following are provided only if the video hardware supports a
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* hardware cursor
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*/
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#ifdef CONFIG_FB_HWCURSOR
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int (*getcursor)(FAR struct lcd_dev_s *dev,
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FAR struct fb_cursorattrib_s *attrib);
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int (*setcursor)(FAR struct lcd_dev_s *dev,
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FAR struct fb_setcursor_s *settings);
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#endif
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/* LCD Specific Controls **************************************************/
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/* Get the LCD panel power status (0: full off - CONFIG_LCD_MAXPOWER: full
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* on). On backlit LCDs, this setting may correspond to the backlight
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* setting.
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*/
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int (*getpower)(struct lcd_dev_s *dev);
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/* Enable/disable LCD panel power (0: full off - CONFIG_LCD_MAXPOWER: full
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* on). On backlit LCDs, this setting may correspond to the backlight
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* setting.
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*/
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int (*setpower)(struct lcd_dev_s *dev, int power);
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/* Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST) */
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int (*getcontrast)(struct lcd_dev_s *dev);
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/* Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST) */
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int (*setcontrast)(struct lcd_dev_s *dev, unsigned int contrast);
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/* Set LCD panel frame rate (0: disable refresh) */
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int (*setframerate)(struct lcd_dev_s *dev, int rate);
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/* Get LCD panel frame rate (0: disable refresh) */
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int (*getframerate)(struct lcd_dev_s *dev);
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};
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __INCLUDE_NUTTX_LCD_LCD_H */
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