/****************************************************************************
* drivers/lcd/skeleton.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/spi/spi.h>
#include <nuttx/lcd/lcd.h>
#include "up_arch.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* Verify that all configuration requirements have been met */
/* Debug ********************************************************************/
/* Define the following to enable register-level debug output */
#undef CONFIG_LCD_SKELDEBUG
/* Verbose debug must also be enabled */
#ifndef CONFIG_DEBUG_FEATURES
# undef CONFIG_DEBUG_INFO
# undef CONFIG_DEBUG_GRAPHICS
#endif
#ifndef CONFIG_DEBUG_INFO
# undef CONFIG_LCD_SKELDEBUG
#endif
/* Color Properties *********************************************************/
/* Display Resolution */
#define SKEL_XRES 320
#define SKEL_YRES 240
/* Color depth and format */
#define SKEL_BPP 16
#define SKEL_COLORFMT FB_FMT_RGB16_565
/* Debug ********************************************************************/
#ifdef CONFIG_LCD_SKELDEBUG
# define skelerr(format, ...) _err(format, ##__VA_ARGS__)
# define skelwarn(format, ...) _warn(format, ##__VA_ARGS__)
# define skelinfo(format, ...) _info(format, ##__VA_ARGS__)
#else
# define skelerr(x...)
# define skelwarn(x...)
# define skelinfo(x...)
#endif
/****************************************************************************
* Private Type Definition
****************************************************************************/
/* This structure describes the state of this driver */
struct skel_dev_s
{
/* Publicly visible device structure */
struct lcd_dev_s dev;
/* Private LCD-specific information follows */
};
/****************************************************************************
* Private Function Protototypes
****************************************************************************/
/* LCD Data Transfer Methods */
static int skel_putrun(fb_coord_t row, fb_coord_t col,
FAR const uint8_t *buffer,
size_t npixels);
static int skel_getrun(fb_coord_t row, fb_coord_t col,
FAR uint8_t *buffer,
size_t npixels);
/* LCD Configuration */
static int skel_getvideoinfo(FAR struct lcd_dev_s *dev,
FAR struct fb_videoinfo_s *vinfo);
static int skel_getplaneinfo(FAR struct lcd_dev_s *dev,
unsigned int planeno,
FAR struct lcd_planeinfo_s *pinfo);
/* LCD RGB Mapping */
#ifdef CONFIG_FB_CMAP
# error "RGB color mapping not supported by this driver"
#endif
/* Cursor Controls */
#ifdef CONFIG_FB_HWCURSOR
# error "Cursor control not supported by this driver"
#endif
/* LCD Specific Controls */
static int skel_getpower(struct lcd_dev_s *dev);
static int skel_setpower(struct lcd_dev_s *dev, int power);
static int skel_getcontrast(struct lcd_dev_s *dev);
static int skel_setcontrast(struct lcd_dev_s *dev,
unsigned int contrast);
/****************************************************************************
* Private Data
****************************************************************************/
/* This is working memory allocated by the LCD driver for each LCD device
* and for each color plane. This memory will hold one raster line of data.
* The size of the allocated run buffer must therefore be at least
* (bpp * xres / 8). Actual alignment of the buffer must conform to the
* bitwidth of the underlying pixel type.
*
* If there are multiple planes, they may share the same working buffer
* because different planes will not be operate on concurrently. However,
* if there are multiple LCD devices, they must each have unique run buffers.
*/
static uint16_t g_runbuffer[SKEL_XRES];
/* This structure describes the overall LCD video controller */
static const struct fb_videoinfo_s g_videoinfo =
{
.fmt = SKEL_COLORFMT, /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */
.xres = SKEL_XRES, /* Horizontal resolution in pixel columns */
.yres = SKEL_YRES, /* Vertical resolution in pixel rows */
.nplanes = 1, /* Number of color planes supported */
};
/* This is the standard, NuttX Plane information object */
static const struct lcd_planeinfo_s g_planeinfo =
{
.putrun = skel_putrun, /* Put a run into LCD memory */
.getrun = skel_getrun, /* Get a run from LCD memory */
.buffer = (FAR uint8_t *)g_runbuffer, /* Run scratch buffer */
.bpp = SKEL_BPP, /* Bits-per-pixel */
};
/* This is the standard, NuttX LCD driver object */
static struct skel_dev_s g_lcddev =
{
.dev =
{
/* LCD Configuration */
.getvideoinfo = skel_getvideoinfo,
.getplaneinfo = skel_getplaneinfo,
/* LCD RGB Mapping -- Not supported */
/* Cursor Controls -- Not supported */
/* LCD Specific Controls */
.getpower = skel_getpower,
.setpower = skel_setpower,
.getcontrast = skel_getcontrast,
.setcontrast = skel_setcontrast,
},
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: skel_putrun
*
* Description:
* This method can be used to write a partial raster line to the LCD:
*
* row - Starting row to write to (range: 0 <= row < yres)
* col - Starting column to write to (range: 0 <= col <= xres-npixels)
* buffer - The buffer containing the run to be written to the LCD
* npixels - The number of pixels to write to the LCD
* (range: 0 < npixels <= xres-col)
*
****************************************************************************/
static int skel_putrun(fb_coord_t row, fb_coord_t col,
FAR const uint8_t *buffer,
size_t npixels)
{
/* Buffer must be provided and aligned to a 16-bit address boundary */
ginfo("row: %d col: %d npixels: %d\n", row, col, npixels);
DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0);
/* Set up to write the run. */
/* Write the run to GRAM. */
#warning "Missing logic"
return OK;
}
/****************************************************************************
* Name: skel_getrun
*
* Description:
* This method can be used to read a partial raster line from the LCD:
*
* row - Starting row to read from (range: 0 <= row < yres)
* col - Starting column to read read (range: 0 <= col <= xres-npixels)
* buffer - The buffer in which to return the run read from the LCD
* npixels - The number of pixels to read from the LCD
* (range: 0 < npixels <= xres-col)
*
****************************************************************************/
static int skel_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer,
size_t npixels)
{
/* Buffer must be provided and aligned to a 16-bit address boundary */
ginfo("row: %d col: %d npixels: %d\n", row, col, npixels);
DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0);
#warning "Missing logic"
return -ENOSYS;
}
/****************************************************************************
* Name: skel_getvideoinfo
*
* Description:
* Get information about the LCD video controller configuration.
*
****************************************************************************/
static int skel_getvideoinfo(FAR struct lcd_dev_s *dev,
FAR struct fb_videoinfo_s *vinfo)
{
DEBUGASSERT(dev && vinfo);
ginfo("fmt: %d xres: %d yres: %d nplanes: %d\n",
g_videoinfo.fmt, g_videoinfo.xres,
g_videoinfo.yres, g_videoinfo.nplanes);
memcpy(vinfo, &g_videoinfo, sizeof(struct fb_videoinfo_s));
return OK;
}
/****************************************************************************
* Name: skel_getplaneinfo
*
* Description:
* Get information about the configuration of each LCD color plane.
*
****************************************************************************/
static int skel_getplaneinfo(FAR struct lcd_dev_s *dev,
unsigned int planeno,
FAR struct lcd_planeinfo_s *pinfo)
{
DEBUGASSERT(dev && pinfo && planeno == 0);
ginfo("planeno: %d bpp: %d\n", planeno, g_planeinfo.bpp);
memcpy(pinfo, &g_planeinfo, sizeof(struct lcd_planeinfo_s));
return OK;
}
/****************************************************************************
* Name: skel_getpower
*
* Description:
* Get the LCD panel power status
* (0: full off - CONFIG_LCD_MAXPOWER: full on).
* On backlit LCDs, this setting may correspond to the backlight setting.
*
****************************************************************************/
static int skel_getpower(struct lcd_dev_s *dev)
{
struct skel_dev_s *priv = (struct skel_dev_s *)dev;
ginfo("power: %d\n", 0);
#warning "Missing logic"
return 0;
}
/****************************************************************************
* Name: skel_setpower
*
* Description:
* Enable/disable LCD panel power
* (0: full off - CONFIG_LCD_MAXPOWER: full on).
* On backlit LCDs, this setting may correspond to the backlight setting.
*
****************************************************************************/
static int skel_setpower(struct lcd_dev_s *dev, int power)
{
struct skel_dev_s *priv = (struct skel_dev_s *)dev;
ginfo("power: %d\n", power);
DEBUGASSERT(power <= CONFIG_LCD_MAXPOWER);
/* Set new power level */
#warning "Missing logic"
return OK;
}
/****************************************************************************
* Name: skel_getcontrast
*
* Description:
* Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST).
*
****************************************************************************/
static int skel_getcontrast(struct lcd_dev_s *dev)
{
ginfo("Not implemented\n");
#warning "Missing logic"
return -ENOSYS;
}
/****************************************************************************
* Name: skel_setcontrast
*
* Description:
* Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST).
*
****************************************************************************/
static int skel_setcontrast(struct lcd_dev_s *dev, unsigned int contrast)
{
ginfo("contrast: %d\n", contrast);
#warning "Missing logic"
return -ENOSYS;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_oledinitialize
*
* Description:
* Initialize the LCD video hardware.
* The initial state of the LCD is fully initialized, display memory
* cleared, and the LCD ready to use, but with the power setting at 0
* (full off).
*
****************************************************************************/
FAR struct lcd_dev_s *up_oledinitialize(FAR struct spi_dev_s *spi)
{
ginfo("Initializing\n");
/* Configure GPIO pins */
#warning "Missing logic"
/* Enable clocking */
#warning "Missing logic"
/* Configure and enable LCD */
#warning "Missing logic"
return &g_lcddev.dev;
}