985 lines
32 KiB
C
985 lines
32 KiB
C
/**************************************************************************************
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* drivers/lcd/ssd1306.c
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* Driver for Univision UG-2864HSWEG01 OLED display or UG-2832HSWEG04 both with the
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* Univision SSD1306 controller in SPI mode
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*
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* Copyright (C) 2012-2013, 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* References:
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* 1. Product Specification (Preliminary), Part Name: OEL Display Module, Part ID:
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* UG-2864HSWEG01, Doc No: SAS1-9046-B, Univision Technology Inc.
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* 2. Product Specification, Part Name: OEL Display Module, Part ID: UG-2832HSWEG04,
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* Doc No.: SAS1-B020-B, Univision Technology Inc.
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* 3. SSD1306, 128 X 64 Dot Matrix OLED/PLED, Preliminary Segment/Common Driver with
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* Controller, Solomon Systech
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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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* Device memory organization:
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*
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* +----------------------------+
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* | Column |
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* --------+----+---+---+---+-...-+-----+
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* Page | 0 | 1 | 2 | 3 | ... | 127 |
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* --------+----+---+---+---+-...-+-----+
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* Page 0 | D0 | X | | | | |
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* | D1 | X | | | | |
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* | D2 | X | | | | |
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* | D3 | X | | | | |
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* | D4 | X | | | | |
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* | D5 | X | | | | |
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* | D6 | X | | | | |
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* | D7 | X | | | | |
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* --------+----+---+---+---+-...-+-----+
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* Page 1 | | | | | | |
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* --------+----+---+---+---+-...-+-----+
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* Page 2 | | | | | | |
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* --------+----+---+---+---+-...-+-----+
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* Page 3 | | | | | | |
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* --------+----+---+---+---+-...-+-----+
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* Page 4 | | | | | | |
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* --------+----+---+---+---+-...-+-----+
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* Page 5 | | | | | | |
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* --------+----+---+---+---+-...-+-----+
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* Page 6 | | | | | | |
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* --------+----+---+---+---+-...-+-----+
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* Page 7 | | | | | | |
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* --------+----+---+---+---+-...-+-----+
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*
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* -----------------------------------+---------------------------------------
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* Landscape Display: | Reverse Landscape Display:
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* --------+-----------------------+ | --------+---------------------------+
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* | Column | | | Column |
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* --------+---+---+---+-...-+-----+ | --------+-----+-----+-----+-...-+---+
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* Page 0 | 0 | 1 | 2 | | 127 | | Page 7 | 127 | 126 | 125 | | 0 |
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* --------+---+---+---+-...-+-----+ | --------+-----+-----+-----+-...-+---+
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* Page 1 | V | | Page 6 | ^ |
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* --------+---+---+---+-...-+-----+ | --------+-----+-----+-----+-...-+---+
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* Page 2 | V | | Page 5 | ^ |
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* --------+---+---+---+-...-+-----+ | --------+-----+-----+-----+-...-+---+
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* Page 3 | V | | Page 4 | ^ |
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* --------+---+---+---+-...-+-----+ | --------+-----+-----+-----+-...-+---+
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* Page 4 | V | | Page 3 | ^ |
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* --------+---+---+---+-...-+-----+ | --------+-----+-----+-----+-...-+---+
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* Page 5 | V | | Page 2 | ^ |
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* --------+---+---+---+-...-+-----+ | --------+-----+-----+-----+-...-+---+
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* Page 6 | V | | Page 1 | ^ |
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* --------+---+---+---+-...-+-----+ | --------+-----+-----+-----+-...-+---+
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* Page 7 | V | | Page 0 | ^ |
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* --------+---+---+---+-...-+-----+ | --------+-----+-----+-----+-...-+---+
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* -----------------------------------+---------------------------------------
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*
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* -----------------------------------+---------------------------------------
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* Portrait Display: | Reverse Portrait Display:
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* -----------+---------------------+ | -----------+---------------------+
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* | Page | | | Page |
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* -----------+---+---+---+-...-+---+ | -----------+---+---+---+-...-+---+
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* Column 0 | 0 | 1 | 2 | | 7 | | Column 127 | 7 | 6 | 5 | | 0 |
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* -----------+---+---+---+-...-+---+ | -----------+---+---+---+-...-+---+
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* Column 1 | > > > > > | | Column 126 | |
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* -----------+---+---+---+-...-+---+ | -----------+---+---+---+-...-+---+
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* Column 2 | | | Column 125 | |
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* -----------+---+---+---+-...-+---+ | -----------+---+---+---+-...-+---+
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* ... | | | ... | |
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* -----------+---+---+---+-...-+---+ | -----------+---+---+---+-...-+---+
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* Column 127 | | | Column 0 | < < < < < |
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* -----------+---+---+---+-...-+---+ | -----------+---+---+---+-...-+---+
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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/i2c.h>
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#include <nuttx/spi/spi.h>
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#include <nuttx/lcd/lcd.h>
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#include <nuttx/lcd/ssd1306.h>
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#include <arch/irq.h>
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#include "ssd1306.h"
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#ifdef CONFIG_LCD_SSD1306
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/**************************************************************************************
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* Private Function Prototypes
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**************************************************************************************/
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/* LCD Data Transfer Methods */
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static int ssd1306_putrun(fb_coord_t row, fb_coord_t col,
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FAR const uint8_t *buffer, size_t npixels);
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static int ssd1306_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 ssd1306_getvideoinfo(FAR struct lcd_dev_s *dev,
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FAR struct fb_videoinfo_s *vinfo);
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static int ssd1306_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 ssd1306_getpower(struct lcd_dev_s *dev);
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static int ssd1306_setpower(struct lcd_dev_s *dev, int power);
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static int ssd1306_getcontrast(struct lcd_dev_s *dev);
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static int ssd1306_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[SSD1306_DEV_ROWSIZE];
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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 = SSD1306_DEV_COLORFMT, /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */
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.xres = SSD1306_DEV_XRES, /* Horizontal resolution in pixel columns */
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.yres = SSD1306_DEV_YRES, /* 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 = ssd1306_putrun, /* Put a run into LCD memory */
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.getrun = ssd1306_getrun, /* Get a run from LCD memory */
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.buffer = (FAR uint8_t *)g_runbuffer, /* Run scratch buffer */
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.bpp = SSD1306_DEV_BPP, /* Bits-per-pixel */
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};
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/* This is the OLED driver instance (only a single device is supported for now) */
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static struct ssd1306_dev_s g_oleddev =
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{
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.dev =
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{
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/* LCD Configuration */
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.getvideoinfo = ssd1306_getvideoinfo,
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.getplaneinfo = ssd1306_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 = ssd1306_getpower,
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.setpower = ssd1306_setpower,
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.getcontrast = ssd1306_getcontrast,
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.setcontrast = ssd1306_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: ssd1306_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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* Input Parameters:
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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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#if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
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static int ssd1306_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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/* Because of this line of code, we will only be able to support a single UG device */
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FAR struct ssd1306_dev_s *priv = (FAR struct ssd1306_dev_s *)&g_oleddev;
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FAR uint8_t *fbptr;
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FAR uint8_t *ptr;
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uint8_t devcol;
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uint8_t fbmask;
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uint8_t page;
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uint8_t usrmask;
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int pixlen;
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uint8_t i;
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lcdvdbg("row: %d col: %d npixels: %d\n", row, col, npixels);
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DEBUGASSERT(buffer);
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/* Clip the run to the display */
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pixlen = npixels;
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if ((unsigned int)col + (unsigned int)pixlen > (unsigned int)SSD1306_DEV_XRES)
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{
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pixlen = (int)SSD1306_DEV_XRES - (int)col;
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}
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/* Verify that some portion of the run remains on the display */
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if (pixlen <= 0 || row > SSD1306_DEV_YRES)
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{
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return OK;
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}
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/* Perform coordinate conversion for reverse landscape mode.
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* If the rows are reversed then rows are are a mirror reflection of
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* top to bottom.
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*/
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#ifdef SSD1306_DEV_REVERSEY
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row = (SSD1306_DEV_YRES-1) - row;
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#endif
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/* If the column is switched then the start of the run is the mirror of
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* the end of the run.
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*
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* col+pixlen-1
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* col |
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* 0 | | XRES
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* . S>>>>>>E .
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* . E<<<<<<S .
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* | |
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* | `-(XRES-1)-col
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* ` (XRES-1)-col-(pixlen-1)
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*/
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#ifdef SSD1306_DEV_REVERSEX
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col = (SSD1306_DEV_XRES-1) - col;
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col -= (pixlen - 1);
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#endif
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/* Get the page number. The range of 64 lines is divided up into eight
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* pages of 8 lines each.
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*/
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page = row >> 3;
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/* Update the shadow frame buffer memory. First determine the pixel
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* position in the frame buffer memory. Pixels are organized like
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* this:
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*
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* --------+---+---+---+---+-...-+-----+
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* Segment | 0 | 1 | 2 | 3 | ... | 131 |
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* --------+---+---+---+---+-...-+-----+
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* D0 | | X | | | | |
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* D1 | | X | | | | |
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* D2 | | X | | | | |
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* D3 | | X | | | | |
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* D4 | | X | | | | |
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* D5 | | X | | | | |
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* D6 | | X | | | | |
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* D7 | | X | | | | |
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* --------+---+---+---+---+-...-+-----+
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*
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* So, in order to draw a white, horizontal line, at row 45. we
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* would have to modify all of the bytes in page 45/8 = 5. We
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* would have to set bit 45%8 = 5 in every byte in the page.
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*/
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fbmask = 1 << (row & 7);
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fbptr = &priv->fb[page * SSD1306_DEV_XRES + col];
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#ifdef SSD1306_DEV_REVERSEX
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ptr = fbptr + (pixlen - 1);
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#else
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ptr = fbptr;
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#endif
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#ifdef CONFIG_NX_PACKEDMSFIRST
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usrmask = MS_BIT;
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#else
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usrmask = LS_BIT;
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#endif
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for (i = 0; i < pixlen; i++)
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{
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/* Set or clear the corresponding bit */
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#ifdef SSD1306_DEV_REVERSEX
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if ((*buffer & usrmask) != 0)
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{
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*ptr-- |= fbmask;
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}
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else
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{
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*ptr-- &= ~fbmask;
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}
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#else
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if ((*buffer & usrmask) != 0)
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{
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*ptr++ |= fbmask;
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}
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else
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{
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*ptr++ &= ~fbmask;
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}
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#endif
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/* Inc/Decrement to the next source pixel */
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#ifdef CONFIG_NX_PACKEDMSFIRST
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if (usrmask == LS_BIT)
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{
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buffer++;
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usrmask = MS_BIT;
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}
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else
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{
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usrmask >>= 1;
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}
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#else
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if (usrmask == MS_BIT)
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{
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buffer++;
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usrmask = LS_BIT;
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}
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else
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{
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usrmask <<= 1;
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}
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#endif
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}
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/* Offset the column position to account for smaller horizontal
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* display range.
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*/
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devcol = col + SSD1306_DEV_XOFFSET;
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/* Lock and select device */
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ssd1306_select(priv, true);
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/* Select command transfer */
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ssd1306_cmddata(priv, true);
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/* Set the starting position for the run */
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/* Set the column address to the XOFFSET value */
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ssd1306_sendbyte(priv, SSD1306_SETCOLL(devcol & 0x0f));
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ssd1306_sendbyte(priv, SSD1306_SETCOLH(devcol >> 4));
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/* Set the page address */
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ssd1306_sendbyte(priv, SSD1306_PAGEADDR(page));
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/* Select data transfer */
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ssd1306_cmddata(priv, false);
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/* Then transfer all of the data */
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ssd1306_sendblk(priv, fbptr, pixlen);
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/* De-select and unlock the device */
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ssd1306_select(priv, false);
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return OK;
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}
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#else
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# error "Configuration not implemented"
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#endif
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|
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/**************************************************************************************
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* Name: ssd1306_getrun
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*
|
|
* Description:
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|
* This method can be used to read a partial raster line from the LCD.
|
|
*
|
|
* Description:
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|
* This method can be used to write a partial raster line to the LCD.
|
|
*
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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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|
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#if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
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static int ssd1306_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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/* Because of this line of code, we will only be able to support a single UG device */
|
|
|
|
FAR struct ssd1306_dev_s *priv = &g_oleddev;
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FAR uint8_t *fbptr;
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uint8_t page;
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uint8_t fbmask;
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uint8_t usrmask;
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int pixlen;
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uint8_t i;
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lcdvdbg("row: %d col: %d npixels: %d\n", row, col, npixels);
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DEBUGASSERT(buffer);
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|
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/* Clip the run to the display */
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|
|
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pixlen = npixels;
|
|
if ((unsigned int)col + (unsigned int)pixlen > (unsigned int)SSD1306_DEV_XRES)
|
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{
|
|
pixlen = (int)SSD1306_DEV_XRES - (int)col;
|
|
}
|
|
|
|
/* Verify that some portion of the run is actually the display */
|
|
|
|
if (pixlen <= 0 || row > SSD1306_DEV_YRES)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Perform coordinate conversion for reverse landscape mode.
|
|
* If the rows are reversed then rows are are a mirror reflection of
|
|
* top to bottom.
|
|
*/
|
|
|
|
#ifdef SSD1306_DEV_REVERSEY
|
|
row = (SSD1306_DEV_YRES-1) - row;
|
|
#endif
|
|
|
|
/* If the column is switched then the start of the run is the mirror of
|
|
* the end of the run.
|
|
*
|
|
* col+pixlen-1
|
|
* col |
|
|
* 0 | | XRES
|
|
* . S>>>>>>E .
|
|
* . E<<<<<<S .
|
|
* | |
|
|
* | `-(XRES-1)-col
|
|
* ` (XRES-1)-col-(pixlen-1)
|
|
*/
|
|
|
|
#ifdef SSD1306_DEV_REVERSEX
|
|
col = (SSD1306_DEV_XRES-1) - col;
|
|
#endif
|
|
|
|
/* Then transfer the display data from the shadow frame buffer memory */
|
|
/* Get the page number. The range of 64 lines is divided up into eight
|
|
* pages of 8 lines each.
|
|
*/
|
|
|
|
page = row >> 3;
|
|
|
|
/* Update the shadow frame buffer memory. First determine the pixel
|
|
* position in the frame buffer memory. Pixels are organized like
|
|
* this:
|
|
*
|
|
* --------+---+---+---+---+-...-+-----+
|
|
* Segment | 0 | 1 | 2 | 3 | ... | 131 |
|
|
* --------+---+---+---+---+-...-+-----+
|
|
* D0 | | X | | | | |
|
|
* D1 | | X | | | | |
|
|
* D2 | | X | | | | |
|
|
* D3 | | X | | | | |
|
|
* D4 | | X | | | | |
|
|
* D5 | | X | | | | |
|
|
* D6 | | X | | | | |
|
|
* D7 | | X | | | | |
|
|
* --------+---+---+---+---+-...-+-----+
|
|
*
|
|
* So, in order to draw a white, horizontal line, at row 45. we
|
|
* would have to modify all of the bytes in page 45/8 = 5. We
|
|
* would have to set bit 45%8 = 5 in every byte in the page.
|
|
*/
|
|
|
|
fbmask = 1 << (row & 7);
|
|
fbptr = &priv->fb[page * SSD1306_DEV_XRES + col];
|
|
|
|
#ifdef CONFIG_NX_PACKEDMSFIRST
|
|
usrmask = MS_BIT;
|
|
#else
|
|
usrmask = LS_BIT;
|
|
#endif
|
|
|
|
*buffer = 0;
|
|
for (i = 0; i < pixlen; i++)
|
|
{
|
|
/* Set or clear the corresponding bit */
|
|
|
|
#ifdef SSD1306_DEV_REVERSEX
|
|
uint8_t byte = *fbptr--;
|
|
#else
|
|
uint8_t byte = *fbptr++;
|
|
#endif
|
|
if ((byte & fbmask) != 0)
|
|
{
|
|
*buffer |= usrmask;
|
|
}
|
|
|
|
/* Inc/Decrement to the next destination pixel. Hmmmm. It looks like
|
|
* this logic could write past the end of the user buffer. Revisit
|
|
* this!
|
|
*/
|
|
|
|
#ifdef CONFIG_NX_PACKEDMSFIRST
|
|
if (usrmask == LS_BIT)
|
|
{
|
|
buffer++;
|
|
*buffer = 0;
|
|
usrmask = MS_BIT;
|
|
}
|
|
else
|
|
{
|
|
usrmask >>= 1;
|
|
}
|
|
#else
|
|
if (usrmask == MS_BIT)
|
|
{
|
|
buffer++;
|
|
*buffer = 0;
|
|
usrmask = LS_BIT;
|
|
}
|
|
else
|
|
{
|
|
usrmask <<= 1;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
#else
|
|
# error "Configuration not implemented"
|
|
#endif
|
|
|
|
/**************************************************************************************
|
|
* Name: ssd1306_getvideoinfo
|
|
*
|
|
* Description:
|
|
* Get information about the LCD video controller configuration.
|
|
*
|
|
**************************************************************************************/
|
|
|
|
static int ssd1306_getvideoinfo(FAR struct lcd_dev_s *dev,
|
|
FAR struct fb_videoinfo_s *vinfo)
|
|
{
|
|
DEBUGASSERT(dev && vinfo);
|
|
lcdvdbg("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: ssd1306_getplaneinfo
|
|
*
|
|
* Description:
|
|
* Get information about the configuration of each LCD color plane.
|
|
*
|
|
**************************************************************************************/
|
|
|
|
static int ssd1306_getplaneinfo(FAR struct lcd_dev_s *dev, unsigned int planeno,
|
|
FAR struct lcd_planeinfo_s *pinfo)
|
|
{
|
|
DEBUGASSERT(pinfo && planeno == 0);
|
|
lcdvdbg("planeno: %d bpp: %d\n", planeno, g_planeinfo.bpp);
|
|
memcpy(pinfo, &g_planeinfo, sizeof(struct lcd_planeinfo_s));
|
|
return OK;
|
|
}
|
|
|
|
/**************************************************************************************
|
|
* Name: ssd1306_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 ssd1306_getpower(FAR struct lcd_dev_s *dev)
|
|
{
|
|
FAR struct ssd1306_dev_s *priv = (FAR struct ssd1306_dev_s *)dev;
|
|
DEBUGASSERT(priv);
|
|
|
|
lcdvdbg("power: %s\n", priv->on ? "ON" : "OFF");
|
|
return priv->on ? CONFIG_LCD_MAXPOWER : 0;
|
|
}
|
|
|
|
/**************************************************************************************
|
|
* Name: ssd1306_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 ssd1306_setpower(FAR struct lcd_dev_s *dev, int power)
|
|
{
|
|
struct ssd1306_dev_s *priv = (struct ssd1306_dev_s *)dev;
|
|
DEBUGASSERT(priv && (unsigned)power <= CONFIG_LCD_MAXPOWER);
|
|
|
|
lcdvdbg("power: %d [%d]\n", power, priv->on ? CONFIG_LCD_MAXPOWER : 0);
|
|
|
|
/* Lock and select device */
|
|
|
|
ssd1306_select(priv, true);
|
|
|
|
if (power <= 0)
|
|
{
|
|
/* Turn the display off */
|
|
|
|
(void)ssd1306_sendbyte(priv, SSD1306_DISPOFF);
|
|
priv->on = false;
|
|
}
|
|
else
|
|
{
|
|
/* Turn the display on */
|
|
|
|
(void)ssd1306_sendbyte(priv, SSD1306_DISPON);
|
|
priv->on = true;
|
|
}
|
|
|
|
/* De-select and unlock the device */
|
|
|
|
ssd1306_select(priv, false);
|
|
return OK;
|
|
}
|
|
|
|
/**************************************************************************************
|
|
* Name: ssd1306_getcontrast
|
|
*
|
|
* Description:
|
|
* Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST).
|
|
*
|
|
**************************************************************************************/
|
|
|
|
static int ssd1306_getcontrast(struct lcd_dev_s *dev)
|
|
{
|
|
struct ssd1306_dev_s *priv = (struct ssd1306_dev_s *)dev;
|
|
DEBUGASSERT(priv);
|
|
|
|
lcdvdbg("contrast: %d\n", priv->contrast);
|
|
return priv->contrast;
|
|
}
|
|
|
|
/**************************************************************************************
|
|
* Name: ssd1306_setcontrast
|
|
*
|
|
* Description:
|
|
* Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST).
|
|
*
|
|
**************************************************************************************/
|
|
|
|
static int ssd1306_setcontrast(struct lcd_dev_s *dev, unsigned int contrast)
|
|
{
|
|
struct ssd1306_dev_s *priv = (struct ssd1306_dev_s *)dev;
|
|
unsigned int scaled;
|
|
|
|
lcdvdbg("contrast: %d\n", contrast);
|
|
DEBUGASSERT(priv);
|
|
|
|
/* Verify the contrast value */
|
|
|
|
#ifdef CONFIG_DEBUG
|
|
if (contrast > CONFIG_LCD_MAXCONTRAST)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
#endif
|
|
|
|
/* Scale contrast: newcontrast = 255 * contrast / CONFIG_LCD_MAXCONTRAST
|
|
* Where contrast is in the range {1,255}
|
|
*/
|
|
|
|
#if CONFIG_LCD_MAXCONTRAST != 255
|
|
scaled = ((contrast << 8) - 1) / CONFIG_LCD_MAXCONTRAST;
|
|
#else
|
|
scaled = contrast;
|
|
#endif
|
|
|
|
/* Lock and select device */
|
|
|
|
ssd1306_select(priv, true);
|
|
|
|
/* Select command transfer */
|
|
|
|
ssd1306_cmddata(priv, true);
|
|
|
|
/* Set the contrast */
|
|
|
|
(void)ssd1306_sendbyte(priv, SSD1306_CONTRAST_MODE); /* Set contrast control register */
|
|
(void)ssd1306_sendbyte(priv, SSD1306_CONTRAST(scaled)); /* Data 1: Set 1 of 256 contrast steps */
|
|
priv->contrast = contrast;
|
|
|
|
/* De-select and unlock the device */
|
|
|
|
ssd1306_select(priv, false);
|
|
return OK;
|
|
}
|
|
|
|
/**************************************************************************************
|
|
* Public Functions
|
|
**************************************************************************************/
|
|
|
|
/**************************************************************************************
|
|
* Name: ssd1306_initialize
|
|
*
|
|
* Description:
|
|
* Initialize the UG-2864HSWEG01 video hardware. The initial state of the
|
|
* OLED is fully initialized, display memory cleared, and the OLED ready
|
|
* to use, but with the power setting at 0 (full off == sleep mode).
|
|
*
|
|
* Input Parameters:
|
|
*
|
|
* spi - A reference to the SPI driver instance.
|
|
* devno - A value in the range of 0 through CONFIG_SSD1306_NINTERFACES-1.
|
|
* This allows support for multiple OLED devices.
|
|
*
|
|
* Returned Value:
|
|
*
|
|
* On success, this function returns a reference to the LCD object for
|
|
* the specified OLED. NULL is returned on any failure.
|
|
*
|
|
**************************************************************************************/
|
|
|
|
#ifdef CONFIG_LCD_SSD1306_SPI
|
|
FAR struct lcd_dev_s *ssd1306_initialize(FAR struct spi_dev_s *dev, unsigned int devno)
|
|
#else
|
|
FAR struct lcd_dev_s *ssd1306_initialize(FAR struct i2c_dev_s *dev, unsigned int devno)
|
|
#endif
|
|
{
|
|
FAR struct ssd1306_dev_s *priv = &g_oleddev;
|
|
|
|
lcdvdbg("Initializing\n");
|
|
DEBUGASSERT(spi && devno == 0);
|
|
|
|
#ifdef CONFIG_LCD_SSD1306_SPI
|
|
priv->spi = dev;
|
|
|
|
/* If this SPI bus is not shared, then we can config it now.
|
|
* If it is shared, then other device could change our config,
|
|
* then just configure before sending data.
|
|
*/
|
|
|
|
# ifdef CONFIG_SPI_OWNBUS
|
|
/* Configure SPI */
|
|
|
|
SPI_SETMODE(priv->spi, CONFIG_SSD1306_SPIMODE);
|
|
SPI_SETBITS(priv->spi, 8);
|
|
SPI_SETFREQUENCY(priv->spi, CONFIG_SSD1306_FREQUENCY);
|
|
# else
|
|
/* Configure the SPI */
|
|
|
|
ssd1306_configspi(priv->spi);
|
|
# endif
|
|
|
|
#else
|
|
/* Remember the I2C configuration */
|
|
|
|
priv->i2c = dev;
|
|
priv->addr = CONFIG_SSD1306_I2CADDR;
|
|
|
|
/* Set the I2C address and frequency. REVISIT: This logic would be
|
|
* insufficient if we share the I2C bus with any other devices that also
|
|
* modify the address and frequency.
|
|
*/
|
|
|
|
I2C_SETADDRESS(priv->i2c, CONFIG_SSD1306_I2CADDR, 7);
|
|
I2C_SETFREQUENCY(priv->i2c, CONFIG_SSD1306_I2CFREQ);
|
|
#endif
|
|
|
|
/* Lock and select device */
|
|
|
|
ssd1306_select(priv, true);
|
|
|
|
/* Select command transfer */
|
|
|
|
ssd1306_cmddata(priv, true);
|
|
|
|
/* Configure OLED SPI or I/O, must be delayed 1-10ms */
|
|
|
|
up_mdelay(5);
|
|
|
|
/* Configure the device */
|
|
|
|
ssd1306_sendbyte(priv, SSD1306_DISPOFF); /* Display off 0xae */
|
|
ssd1306_sendbyte(priv, SSD1306_SETCOLL(0)); /* Set lower column address 0x00 */
|
|
ssd1306_sendbyte(priv, SSD1306_SETCOLH(0)); /* Set higher column address 0x10 */
|
|
ssd1306_sendbyte(priv, SSD1306_STARTLINE(0)); /* Set display start line 0x40 */
|
|
//ssd1306_sendbyte(priv, SSD1306_PAGEADDR(0)); /* Set page address (Can ignore) */
|
|
ssd1306_sendbyte(priv, SSD1306_CONTRAST_MODE); /* Contrast control 0x81 */
|
|
ssd1306_sendbyte(priv, SSD1306_CONTRAST(SSD1306_DEV_CONTRAST)); /* Default contrast 0xCF */
|
|
ssd1306_sendbyte(priv, SSD1306_REMAPPLEFT); /* Set segment remap left 95 to 0 | 0xa1 */
|
|
//ssd1306_sendbyte(priv, SSD1306_EDISPOFF); /* Normal display off 0xa4 (Can ignore) */
|
|
ssd1306_sendbyte(priv, SSD1306_NORMAL); /* Normal (un-reversed) display mode 0xa6 */
|
|
ssd1306_sendbyte(priv, SSD1306_MRATIO_MODE); /* Multiplex ratio 0xa8 */
|
|
ssd1306_sendbyte(priv, SSD1306_MRATIO(SSD1306_DEV_DUTY)); /* Duty = 1/64 or 1/32 */
|
|
//ssd1306_sendbyte(priv, SSD1306_SCANTOCOM0); /* Com scan direction: Scan from COM[n-1] to COM[0] (Can ignore) */
|
|
ssd1306_sendbyte(priv, SSD1306_DISPOFFS_MODE); /* Set display offset 0xd3 */
|
|
ssd1306_sendbyte(priv, SSD1306_DISPOFFS(0));
|
|
ssd1306_sendbyte(priv, SSD1306_CLKDIV_SET); /* Set clock divider 0xd5 */
|
|
ssd1306_sendbyte(priv, SSD1306_CLKDIV(8, 0)); /* 0x80 */
|
|
|
|
ssd1306_sendbyte(priv, SSD1306_CHRGPER_SET); /* Set pre-charge period 0xd9 */
|
|
ssd1306_sendbyte(priv, SSD1306_CHRGPER(0x0f, 1)); /* 0xf1 or 0x22 Enhanced mode */
|
|
|
|
ssd1306_sendbyte(priv, SSD1306_CMNPAD_CONFIG); /* Set common pads / set com pins hardware configuration 0xda */
|
|
ssd1306_sendbyte(priv, SSD1306_CMNPAD(SSD1306_DEV_CMNPAD)); /* 0x12 or 0x02 */
|
|
|
|
ssd1306_sendbyte(priv, SSD1306_VCOM_SET); /* set vcomh 0xdb */
|
|
ssd1306_sendbyte(priv, SSD1306_VCOM(0x40));
|
|
|
|
ssd1306_sendbyte(priv, SSD1306_CHRPUMP_SET); /* Set Charge Pump enable/disable 0x8d ssd1306 */
|
|
ssd1306_sendbyte(priv, SSD1306_CHRPUMP_ON); /* 0x14 close 0x10 */
|
|
|
|
//ssd1306_sendbyte(priv, SSD1306_DCDC_MODE); /* DC/DC control mode: on (SSD1306 Not supported) */
|
|
//ssd1306_sendbyte(priv, SSD1306_DCDC_ON);
|
|
|
|
ssd1306_sendbyte(priv, SSD1306_DISPON); /* Display ON 0xaf */
|
|
|
|
/* De-select and unlock the device */
|
|
|
|
ssd1306_select(priv, false);
|
|
|
|
/* Clear the display */
|
|
|
|
up_mdelay(100);
|
|
ssd1306_fill(&priv->dev, SSD1306_Y1_BLACK);
|
|
return &priv->dev;
|
|
}
|
|
|
|
/**************************************************************************************
|
|
* Name: ssd1306_fill
|
|
*
|
|
* Description:
|
|
* This non-standard method can be used to clear the entire display by writing one
|
|
* color to the display. This is much faster than writing a series of runs.
|
|
*
|
|
* Input Parameters:
|
|
* priv - Reference to private driver structure
|
|
*
|
|
* Assumptions:
|
|
* Caller has selected the OLED section.
|
|
*
|
|
**************************************************************************************/
|
|
|
|
void ssd1306_fill(FAR struct lcd_dev_s *dev, uint8_t color)
|
|
{
|
|
FAR struct ssd1306_dev_s *priv = &g_oleddev;
|
|
unsigned int page;
|
|
|
|
/* Make an 8-bit version of the selected color */
|
|
|
|
if (color & 1)
|
|
{
|
|
color = 0xff;
|
|
}
|
|
else
|
|
{
|
|
color = 0;
|
|
}
|
|
|
|
/* Initialize the framebuffer */
|
|
|
|
memset(priv->fb, color, SSD1306_DEV_FBSIZE);
|
|
|
|
/* Lock and select device */
|
|
|
|
ssd1306_select(priv, true);
|
|
|
|
/* Visit each page */
|
|
|
|
for (page = 0; page < SSD1306_DEV_PAGES; page++)
|
|
{
|
|
/* Select command transfer */
|
|
|
|
ssd1306_cmddata(priv, true);
|
|
|
|
/* Set the column address to the XOFFSET value */
|
|
|
|
ssd1306_sendbyte(priv, SSD1306_SETCOLL(SSD1306_DEV_XOFFSET));
|
|
ssd1306_sendbyte(priv, SSD1306_SETCOLH(0));
|
|
|
|
/* Set the page address */
|
|
|
|
ssd1306_sendbyte(priv, SSD1306_PAGEADDR(page));
|
|
|
|
/* Select data transfer */
|
|
|
|
ssd1306_cmddata(priv, false);
|
|
|
|
/* Transfer one page of the selected color */
|
|
|
|
ssd1306_sendblk(priv, &priv->fb[page * SSD1306_DEV_XRES],
|
|
SSD1306_DEV_XRES);
|
|
}
|
|
|
|
/* De-select and unlock the device */
|
|
|
|
ssd1306_select(priv, false);
|
|
}
|
|
|
|
#endif /* CONFIG_LCD_SSD1306 */
|