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incubator-nuttx/drivers/lcd/ssd1306_base.c

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/****************************************************************************
* drivers/lcd/ssd1306_base.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.
*
****************************************************************************/
/* Driver for Univision UG-2864HSWEG01 OLED display or UG-2832HSWEG04 both
* with the Univision SSD1306 controller in SPI mode and Densitron
* DD-12864WO-4A with SSD1309 in SPI mode.
*
* References:
* 1. Product Specification, Part Name: OEL Display Module, Part ID:
* UG-2864HSWEG01, Doc No: SAS1-9046-B, Univision Technology Inc.
* 2. Product Specification, Part Name: OEL Display Module, Part ID:
* UG-2832HSWEG04, Doc No.: SAS1-B020-B, Univision Technology Inc.
* 3. SSD1306, 128 X 64 Dot Matrix OLED/PLED, Preliminary Segment/Common
* Driver with Controller, Solomon Systech
* 4. SSD1309, 128 x 64 Dot Matrix OLED/PLED Segment/Common Driver with
* Controller, Solomon Systech
*/
/****************************************************************************
* Device memory organization:
*
* +----------------------------+
* | Column |
* --------+----+---+---+---+-...-+-----+
* Page | 0 | 1 | 2 | 3 | ... | 127 |
* --------+----+---+---+---+-...-+-----+
* Page 0 | D0 | X | | | | |
* | D1 | X | | | | |
* | D2 | X | | | | |
* | D3 | X | | | | |
* | D4 | X | | | | |
* | D5 | X | | | | |
* | D6 | X | | | | |
* | D7 | X | | | | |
* --------+----+---+---+---+-...-+-----+
* Page 1 | | | | | | |
* --------+----+---+---+---+-...-+-----+
* Page 2 | | | | | | |
* --------+----+---+---+---+-...-+-----+
* Page 3 | | | | | | |
* --------+----+---+---+---+-...-+-----+
* Page 4 | | | | | | |
* --------+----+---+---+---+-...-+-----+
* Page 5 | | | | | | |
* --------+----+---+---+---+-...-+-----+
* Page 6 | | | | | | |
* --------+----+---+---+---+-...-+-----+
* Page 7 | | | | | | |
* --------+----+---+---+---+-...-+-----+
*
* ----------------------------------+--------------------------------------
* Landscape Display: | Reverse Landscape Display:
* --------+----------------------+ | --------+--------------------------+
* | Column | | | Column |
* --------+---+---+---+-..-+-----+ | --------+-----+-----+-----+-..-+---+
* Page 0 | 0 | 1 | 2 | | 127 | | Page 7 | 127 | 126 | 125 | | 0 |
* --------+---+---+---+-..-+-----+ | --------+-----+-----+-----+-..-+---+
* Page 1 | V | | Page 6 | ^ |
* --------+---+---+---+-..-+-----+ | --------+-----+-----+-----+-..-+---+
* Page 2 | V | | Page 5 | ^ |
* --------+---+---+---+-..-+-----+ | --------+-----+-----+-----+-..-+---+
* Page 3 | V | | Page 4 | ^ |
* --------+---+---+---+-..-+-----+ | --------+-----+-----+-----+-..-+---+
* Page 4 | V | | Page 3 | ^ |
* --------+---+---+---+-..-+-----+ | --------+-----+-----+-----+-..-+---+
* Page 5 | V | | Page 2 | ^ |
* --------+---+---+---+-..-+-----+ | --------+-----+-----+-----+-..-+---+
* Page 6 | V | | Page 1 | ^ |
* --------+---+---+---+-..-+-----+ | --------+-----+-----+-----+-..-+---+
* Page 7 | V | | Page 0 | ^ |
* --------+---+---+---+-..-+-----+ | --------+-----+-----+-----+-..-+---+
* ----------------------------------+--------------------------------------
*
* -----------------------------------+-------------------------------------
* Portrait Display: | Reverse Portrait Display:
* -----------+---------------------+ | -----------+---------------------+
* | Page | | | Page |
* -----------+---+---+---+-...-+---+ | -----------+---+---+---+-...-+---+
* Column 0 | 0 | 1 | 2 | | 7 | | Column 127 | 7 | 6 | 5 | | 0 |
* -----------+---+---+---+-...-+---+ | -----------+---+---+---+-...-+---+
* Column 1 | > > > > > | | Column 126 | |
* -----------+---+---+---+-...-+---+ | -----------+---+---+---+-...-+---+
* Column 2 | | | Column 125 | |
* -----------+---+---+---+-...-+---+ | -----------+---+---+---+-...-+---+
* ... | | | ... | |
* -----------+---+---+---+-...-+---+ | -----------+---+---+---+-...-+---+
* Column 127 | | | Column 0 | < < < < < |
* -----------+---+---+---+-...-+---+ | -----------+---+---+---+-...-+---+
* -----------------------------------+-------------------------------------
****************************************************************************/
/****************************************************************************
* 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/i2c/i2c_master.h>
#include <nuttx/spi/spi.h>
#include <nuttx/lcd/lcd.h>
#include <nuttx/lcd/ssd1306.h>
#include <nuttx/signal.h>
#include <arch/irq.h>
#include "ssd1306.h"
#ifdef CONFIG_LCD_SSD1306
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* LCD Data Transfer Methods */
static int ssd1306_putrun(FAR struct lcd_dev_s *dev, fb_coord_t row,
fb_coord_t col, FAR const uint8_t *buffer,
size_t npixels);
static int ssd1306_getrun(FAR struct lcd_dev_s *dev, fb_coord_t row,
fb_coord_t col, FAR uint8_t *buffer,
size_t npixels);
/* LCD Configuration */
static int ssd1306_getvideoinfo(FAR struct lcd_dev_s *dev,
FAR struct fb_videoinfo_s *vinfo);
static int ssd1306_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 ssd1306_getpower(struct lcd_dev_s *dev);
static int ssd1306_setpower(struct lcd_dev_s *dev, int power);
static int ssd1306_getcontrast(struct lcd_dev_s *dev);
static int ssd1306_setcontrast(struct lcd_dev_s *dev,
unsigned int contrast);
static int ssd1306_do_disponoff(struct ssd1306_dev_s *priv, bool on);
static int ssd1306_configuredisplay(struct ssd1306_dev_s *priv);
static int ssd1306_redrawfb(struct ssd1306_dev_s *priv);
/****************************************************************************
* Private Data
****************************************************************************/
/* This structure describes the overall LCD video controller */
static const struct fb_videoinfo_s g_videoinfo =
{
.fmt = SSD1306_DEV_COLORFMT, /* Color format: B&W */
.xres = SSD1306_DEV_XRES, /* Horizontal resolution in pixel columns */
.yres = SSD1306_DEV_YRES, /* Vertical resolution in pixel rows */
.nplanes = 1, /* Number of color planes supported */
};
/* This is the outside visible interface for the OLED driver */
static const struct lcd_dev_s g_oleddev_dev =
{
/* LCD Configuration */
.getvideoinfo = ssd1306_getvideoinfo,
.getplaneinfo = ssd1306_getplaneinfo,
/* LCD RGB Mapping -- Not supported */
/* Cursor Controls -- Not supported */
/* LCD Specific Controls */
.getpower = ssd1306_getpower,
.setpower = ssd1306_setpower,
.getcontrast = ssd1306_getcontrast,
.setcontrast = ssd1306_setcontrast,
};
/* This is the OLED driver instance. Only a single device is supported
* for now.
*/
static struct ssd1306_dev_s g_oleddev[CONFIG_SSD1306_NUMDEVS];
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: ssd1306_putrun
*
* Description:
* This method can be used to write a partial raster line to the LCD.
*
* Input Parameters:
* 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)
*
****************************************************************************/
#if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
static int ssd1306_putrun(FAR struct lcd_dev_s *dev, fb_coord_t row,
fb_coord_t col, FAR const uint8_t *buffer,
size_t npixels)
{
FAR struct ssd1306_dev_s *priv = (FAR struct ssd1306_dev_s *)dev;
FAR uint8_t *fbptr;
FAR uint8_t *ptr;
uint8_t devcol;
uint8_t fbmask;
uint8_t page;
uint8_t usrmask;
int pixlen;
uint8_t i;
int ret;
lcdinfo("row: %d col: %d npixels: %d\n", row, col, npixels);
DEBUGASSERT(buffer);
/* Clip the run to the display */
pixlen = npixels;
if ((unsigned int)col + (unsigned int)pixlen >
(unsigned int)SSD1306_DEV_XRES)
{
pixlen = (int)SSD1306_DEV_XRES - (int)col;
}
/* Verify that some portion of the run remains on the display */
if (pixlen <= 0 || row > SSD1306_DEV_YRES)
{
return OK;
}
/* 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;
col -= (pixlen - 1);
#endif
/* 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 SSD1306_DEV_REVERSEX
ptr = fbptr + (pixlen - 1);
#else
ptr = fbptr;
#endif
#ifdef CONFIG_LCD_PACKEDMSFIRST
usrmask = MS_BIT;
#else
usrmask = LS_BIT;
#endif
for (i = 0; i < pixlen; i++)
{
/* Set or clear the corresponding bit */
#ifdef SSD1306_DEV_REVERSEX
if ((*buffer & usrmask) != 0)
{
*ptr-- |= fbmask;
}
else
{
*ptr-- &= ~fbmask;
}
#else
if ((*buffer & usrmask) != 0)
{
*ptr++ |= fbmask;
}
else
{
*ptr++ &= ~fbmask;
}
#endif
/* Inc/Decrement to the next source pixel */
#ifdef CONFIG_LCD_PACKEDMSFIRST
if (usrmask == LS_BIT)
{
buffer++;
usrmask = MS_BIT;
}
else
{
usrmask >>= 1;
}
#else
if (usrmask == MS_BIT)
{
buffer++;
usrmask = LS_BIT;
}
else
{
usrmask <<= 1;
}
#endif
}
/* Offset the column position to account for smaller horizontal
* display range.
*/
devcol = col + SSD1306_DEV_XOFFSET;
/* Lock and select device */
ssd1306_select(priv, true);
/* Select command transfer */
ssd1306_cmddata(priv, true);
/* Set the starting position for the run */
/* Set the column address to the XOFFSET value */
ret = ssd1306_sendbyte(priv, SSD1306_SETCOLL(devcol & 0x0f));
if (ret < 0)
{
return ret;
}
ret = ssd1306_sendbyte(priv, SSD1306_SETCOLH(devcol >> 4));
if (ret < 0)
{
return ret;
}
/* Set the page address */
ret = ssd1306_sendbyte(priv, SSD1306_PAGEADDR(page));
if (ret < 0)
{
return ret;
}
/* Select data transfer */
ssd1306_cmddata(priv, false);
/* Then transfer all of the data */
ret = ssd1306_sendblk(priv, fbptr, pixlen);
if (ret < 0)
{
return ret;
}
/* De-select and unlock the device */
ssd1306_select(priv, false);
return OK;
}
#else
# error "Configuration not implemented"
#endif
/****************************************************************************
* Name: ssd1306_getrun
*
* Description:
* This method can be used to read a partial raster line from the LCD.
*
* Description:
* This method can be used to write a partial raster line to 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)
*
****************************************************************************/
#if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
static int ssd1306_getrun(FAR struct lcd_dev_s *dev, fb_coord_t row,
fb_coord_t col, FAR uint8_t *buffer,
size_t npixels)
{
FAR struct ssd1306_dev_s *priv = (FAR struct ssd1306_dev_s *)dev;
FAR uint8_t *fbptr;
uint8_t page;
uint8_t fbmask;
uint8_t usrmask;
int pixlen;
uint8_t i;
lcdinfo("row: %d col: %d npixels: %d\n", row, col, npixels);
DEBUGASSERT(buffer);
/* Clip the run to the display */
pixlen = npixels;
if ((unsigned int)col + (unsigned int)pixlen >
(unsigned int)SSD1306_DEV_XRES)
{
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_LCD_PACKEDMSFIRST
usrmask = MS_BIT;
#else
usrmask = LS_BIT;
#endif
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;
}
else
{
*buffer &= ~usrmask;
}
/* Inc/Decrement to the next destination pixel. */
#ifdef CONFIG_LCD_PACKEDMSFIRST
if (usrmask == LS_BIT)
{
buffer++;
usrmask = MS_BIT;
}
else
{
usrmask >>= 1;
}
#else
if (usrmask == MS_BIT)
{
buffer++;
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);
lcdinfo("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)
{
FAR struct ssd1306_dev_s *priv = (FAR struct ssd1306_dev_s *)dev;
DEBUGASSERT(pinfo && planeno == 0);
lcdinfo("planeno: %d bpp: %d\n", planeno, SSD1306_DEV_BPP);
memset(pinfo, 0, sizeof(struct lcd_planeinfo_s));
pinfo->putrun = ssd1306_putrun;
pinfo->getrun = ssd1306_getrun;
pinfo->bpp = SSD1306_DEV_BPP;
pinfo->buffer = (FAR uint8_t *)priv->runbuffer;
pinfo->dev = dev;
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);
lcdinfo("power: %s\n", priv->on ? "ON" : "OFF");
return priv->on ? CONFIG_LCD_MAXPOWER : 0;
}
/****************************************************************************
* Name: ssd1306_do_disponoff
*
* Description:
* Enable/disable LCD panel power
*
****************************************************************************/
static int ssd1306_do_disponoff(struct ssd1306_dev_s *priv, bool on)
{
int ret;
/* Lock and select device */
ssd1306_select(priv, true);
/* Select command transfer */
ssd1306_cmddata(priv, true);
/* Turn the display on/off */
ret = ssd1306_sendbyte(priv, (on ? SSD1306_DISPON : SSD1306_DISPOFF));
/* De-select and unlock the device */
ssd1306_cmddata(priv, false);
ssd1306_select(priv, false);
return ret;
}
/****************************************************************************
* 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;
int ret;
DEBUGASSERT(priv);
lcdinfo("power: %d [%d]\n", power, priv->on ? CONFIG_LCD_MAXPOWER : 0);
DEBUGASSERT((unsigned)power <= CONFIG_LCD_MAXPOWER);
if (power <= 0)
{
/* Turn the display off */
ret = ssd1306_do_disponoff(priv, false);
if (ret < 0)
{
return ret;
}
priv->on = false;
#ifdef CONFIG_SSD1306_POWEROFF_RECONFIGURE
/* Display is not configured anymore. */
priv->is_conf = false;
#else
/* Try turn off power completely */
if (priv->board_priv && priv->board_priv->set_vcc)
{
/* Do power off. */
if (priv->board_priv->set_vcc(false))
{
/* Display is completely powered off, not configured anymore. */
priv->is_conf = false;
}
}
#endif
}
else
{
if (priv->board_priv && priv->board_priv->set_vcc)
{
/* Do power on. */
priv->board_priv->set_vcc(true);
}
if (!priv->is_conf)
{
/* Configure display and turn the display on */
ret = ssd1306_configuredisplay(priv);
if (ret < 0)
{
return ret;
}
/* Draw the framebuffer */
ret = ssd1306_redrawfb(priv);
}
else
{
/* Turn the display on */
ret = ssd1306_do_disponoff(priv, true);
}
if (ret < 0)
{
return ret;
}
priv->on = true;
}
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);
lcdinfo("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;
int ret;
lcdinfo("contrast: %d\n", contrast);
DEBUGASSERT(priv);
/* Verify the contrast value */
#ifdef CONFIG_DEBUG_FEATURES
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 */
ret = ssd1306_sendbyte(priv, SSD1306_CONTRAST_MODE); /* Set contrast control register */
if (ret < 0)
{
return ret;
}
ret = ssd1306_sendbyte(priv, SSD1306_CONTRAST(scaled)); /* Data 1: Set 1 of 256 contrast steps */
if (ret < 0)
{
return ret;
}
priv->contrast = contrast;
/* De-select and unlock the device */
ssd1306_select(priv, false);
return OK;
}
/****************************************************************************
* Name: ssd1306_configuredisplay
*
* Description:
* Setup LCD display.
*
****************************************************************************/
static int ssd1306_configuredisplay(struct ssd1306_dev_s *priv)
{
int ret;
/* 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 */
nxsig_usleep(5000);
/* Configure the device */
#ifdef IS_SSD1309
/* Unlock driver IC */
ret = ssd1306_sendbyte(priv, SSD1309_PROTOFF);
if (ret < 0)
{
return ret;
}
/* Display off 0xae */
ret = ssd1306_sendbyte(priv, SSD1306_DISPOFF);
if (ret < 0)
{
return ret;
}
/* Set page addressing mode: 0x0, 0x01 or 0x02 */
ret = ssd1306_sendbyte(priv, SSD1309_SETMEMORY);
if (ret < 0)
{
return ret;
}
ret = ssd1306_sendbyte(priv, SSD1309_MEMADDR(0x02));
if (ret < 0)
{
return ret;
}
/* Set lower column address 0x00 */
ret = ssd1306_sendbyte(priv, SSD1306_SETCOLL(0));
if (ret < 0)
{
return ret;
}
/* Set higher column address 0x10 */
ret = ssd1306_sendbyte(priv, SSD1306_SETCOLH(0));
if (ret < 0)
{
return ret;
}
/* Set display start line 0x40 */
ret = ssd1306_sendbyte(priv, SSD1306_STARTLINE(0));
if (ret < 0)
{
return ret;
}
/* Set page address (Can ignore) */
ret = ssd1306_sendbyte(priv, SSD1306_PAGEADDR(0));
if (ret < 0)
{
return ret;
}
/* Contrast control 0x81 */
ret = ssd1306_sendbyte(priv, SSD1306_CONTRAST_MODE);
if (ret < 0)
{
return ret;
}
/* Default contrast 0xff */
ret = ssd1306_sendbyte(priv, SSD1306_CONTRAST(SSD1309_DEV_CONTRAST));
if (ret < 0)
{
return ret;
}
/* Set segment remap left 95 to 0 | 0xa1 */
ret = ssd1306_sendbyte(priv, SSD1306_REMAPPLEFT);
if (ret < 0)
{
return ret;
}
/* Normal display off 0xa4 (Can ignore) */
ret = ssd1306_sendbyte(priv, SSD1306_EDISPOFF);
if (ret < 0)
{
return ret;
}
/* Normal (un-reversed) display mode 0xa6 */
ret = ssd1306_sendbyte(priv, SSD1306_NORMAL);
if (ret < 0)
{
return ret;
}
/* Multiplex ratio 0xa8 */
ret = ssd1306_sendbyte(priv, SSD1306_MRATIO_MODE);
if (ret < 0)
{
return ret;
}
/* Duty = 1/64 or 1/32 */
ret = ssd1306_sendbyte(priv, SSD1306_MRATIO(SSD1306_DEV_DUTY));
if (ret < 0)
{
return ret;
}
/* Com scan direction: Scan from COM[0] to COM[n-1] */
ret = ssd1306_sendbyte(priv, SSD1306_SCANFROMCOM0);
if (ret < 0)
{
return ret;
}
/* Set display offset 0xd3 */
ret = ssd1306_sendbyte(priv, SSD1306_DISPOFFS_MODE);
if (ret < 0)
{
return ret;
}
ret = ssd1306_sendbyte(priv, SSD1306_DISPOFFS(0));
if (ret < 0)
{
return ret;
}
/* Set clock divider 0xd5 */
ret = ssd1306_sendbyte(priv, SSD1306_CLKDIV_SET);
if (ret < 0)
{
return ret;
}
/* 0x70 */
ret = ssd1306_sendbyte(priv, SSD1306_CLKDIV(7, 0));
if (ret < 0)
{
return ret;
}
/* Set pre-charge period 0xd9 */
ret = ssd1306_sendbyte(priv, SSD1306_CHRGPER_SET);
if (ret < 0)
{
return ret;
}
/* 0xfa: Fh cycles for discharge and Ah cycles for pre-charge */
ret = ssd1306_sendbyte(priv, SSD1306_CHRGPER(0x0f, 0x0a));
if (ret < 0)
{
return ret;
}
/* Set common pads / set com pins hardware configuration 0xda */
ret = ssd1306_sendbyte(priv, SSD1306_CMNPAD_CONFIG);
if (ret < 0)
{
return ret;
}
/* 0x12 or 0x02 */
ret = ssd1306_sendbyte(priv, SSD1306_CMNPAD(SSD1306_DEV_CMNPAD));
if (ret < 0)
{
return ret;
}
/* set vcomh 0xdb */
ret = ssd1306_sendbyte(priv, SSD1306_VCOM_SET);
if (ret < 0)
{
return ret;
}
ret = ssd1306_sendbyte(priv, SSD1306_VCOM(0x3c));
if (ret < 0)
{
return ret;
}
#else
/* Display off 0xae */
ret = ssd1306_sendbyte(priv, SSD1306_DISPOFF);
if (ret < 0)
{
return ret;
}
/* Set lower column address 0x00 */
ret = ssd1306_sendbyte(priv, SSD1306_SETCOLL(0));
if (ret < 0)
{
return ret;
}
/* Set higher column address 0x10 */
ret = ssd1306_sendbyte(priv, SSD1306_SETCOLH(0));
if (ret < 0)
{
return ret;
}
/* Set display start line 0x40 */
ret = ssd1306_sendbyte(priv, SSD1306_STARTLINE(0));
if (ret < 0)
{
return ret;
}
/* Contrast control 0x81 */
ret = ssd1306_sendbyte(priv, SSD1306_CONTRAST_MODE);
if (ret < 0)
{
return ret;
}
/* Default contrast 0xcf */
ret = ssd1306_sendbyte(priv, SSD1306_CONTRAST(SSD1306_DEV_CONTRAST));
if (ret < 0)
{
return ret;
}
/* Set segment remap left 95 to 0 | 0xa1 */
ret = ssd1306_sendbyte(priv, SSD1306_REMAPPLEFT);
if (ret < 0)
{
return ret;
}
/* Normal (un-reversed) display mode 0xa6 */
ret = ssd1306_sendbyte(priv, SSD1306_NORMAL);
if (ret < 0)
{
return ret;
}
/* Multiplex ratio 0xa8 */
ret = ssd1306_sendbyte(priv, SSD1306_MRATIO_MODE);
if (ret < 0)
{
return ret;
}
/* Duty = 1/64 or 1/32 */
ret = ssd1306_sendbyte(priv, SSD1306_MRATIO(SSD1306_DEV_DUTY));
if (ret < 0)
{
return ret;
}
/* Set display offset 0xd3 */
ret = ssd1306_sendbyte(priv, SSD1306_DISPOFFS_MODE);
if (ret < 0)
{
return ret;
}
ret = ssd1306_sendbyte(priv, SSD1306_DISPOFFS(0));
if (ret < 0)
{
return ret;
}
/* Set clock divider 0xd5 */
ret = ssd1306_sendbyte(priv, SSD1306_CLKDIV_SET);
if (ret < 0)
{
return ret;
}
/* 0x80 */
ret = ssd1306_sendbyte(priv, SSD1306_CLKDIV(8, 0));
if (ret < 0)
{
return ret;
}
/* Set pre-charge period 0xd9 */
ret = ssd1306_sendbyte(priv, SSD1306_CHRGPER_SET);
if (ret < 0)
{
return ret;
}
/* 0xf1 or 0x22 Enhanced mode */
ret = ssd1306_sendbyte(priv, SSD1306_CHRGPER(0x0f, 1));
if (ret < 0)
{
return ret;
}
/* Set common pads / set com pins hardware configuration 0xda */
ret = ssd1306_sendbyte(priv, SSD1306_CMNPAD_CONFIG);
if (ret < 0)
{
return ret;
}
/* 0x12 or 0x02 */
ret = ssd1306_sendbyte(priv, SSD1306_CMNPAD(SSD1306_DEV_CMNPAD));
if (ret < 0)
{
return ret;
}
/* set vcomh 0xdb */
ret = ssd1306_sendbyte(priv, SSD1306_VCOM_SET);
if (ret < 0)
{
return ret;
}
ret = ssd1306_sendbyte(priv, SSD1306_VCOM(0x40));
if (ret < 0)
{
return ret;
}
/* Set Charge Pump enable/disable 0x8d ssd1306 */
ret = ssd1306_sendbyte(priv, SSD1306_CHRPUMP_SET);
if (ret < 0)
{
return ret;
}
/* 0x14 close 0x10 */
ret = ssd1306_sendbyte(priv, SSD1306_CHRPUMP_ON);
if (ret < 0)
{
return ret;
}
#endif
/* Display ON 0xaf */
ret = ssd1306_sendbyte(priv, SSD1306_DISPON);
if (ret < 0)
{
return ret;
}
/* De-select and unlock the device */
ssd1306_select(priv, false);
nxsig_usleep(100000);
priv->is_conf = true;
return OK;
}
/****************************************************************************
* Name: ssd1306_redrawfb
*
* Description:
* Redraw full framebuffer to display
*
* Input Parameters:
* priv - Reference to private driver structure
*
* Assumptions:
* Caller has selected the OLED section.
*
****************************************************************************/
static int ssd1306_redrawfb(struct ssd1306_dev_s *priv)
{
unsigned int page;
int ret;
/* 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 */
ret = ssd1306_sendbyte(priv, SSD1306_SETCOLL(SSD1306_DEV_XOFFSET));
if (ret < 0)
{
return ret;
}
ret = ssd1306_sendbyte(priv, SSD1306_SETCOLH(0));
if (ret < 0)
{
return ret;
}
/* Set the page address */
ret = ssd1306_sendbyte(priv, SSD1306_PAGEADDR(page));
if (ret < 0)
{
return ret;
}
/* Select data transfer */
ssd1306_cmddata(priv, false);
/* Transfer one page of the selected color */
ret = ssd1306_sendblk(priv, &priv->fb[page * SSD1306_DEV_XRES],
SSD1306_DEV_XRES);
if (ret < 0)
{
return ret;
}
}
/* De-select and unlock the device */
ssd1306_select(priv, false);
return OK;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: ssd1306_initialize
*
* Description:
* Initialize the 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:
*
* dev - A reference to the SPI/I2C driver instance.
* board_priv - Board specific structure.
* devno - A device number when there are multiple OLED devices.
* Currently must be zero.
*
* 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,
FAR const struct ssd1306_priv_s *board_priv,
unsigned int devno)
#else
FAR struct lcd_dev_s *ssd1306_initialize(FAR struct i2c_master_s *dev,
FAR const struct ssd1306_priv_s *board_priv,
unsigned int devno)
#endif
{
FAR struct ssd1306_dev_s *priv = &g_oleddev[devno];
priv->dev = g_oleddev_dev;
DEBUGASSERT(dev && devno < CONFIG_SSD1306_NUMDEVS);
priv->devno = (uint8_t)devno;
priv->on = false;
priv->is_conf = false;
/* Register board specific functions */
priv->board_priv = board_priv;
#ifdef CONFIG_LCD_SSD1306_SPI
priv->spi = dev;
/* Configure the SPI */
ssd1306_configspi(priv->spi);
#else
/* Remember the I2C configuration */
priv->i2c = dev;
priv->addr = CONFIG_SSD1306_I2CADDR;
#endif
/* Initialize the framebuffer */
memset(priv->fb, SSD1306_Y1_BLACK & 1 ? 0xff : 0x00, SSD1306_DEV_FBSIZE);
/* Power on and configure display */
ssd1306_setpower(&priv->dev, true);
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:
* dev - Reference to LCD object
* color - Desired color
*
* Assumptions:
* Caller has selected the OLED section.
*
****************************************************************************/
int ssd1306_fill(FAR struct lcd_dev_s *dev, uint8_t color)
{
FAR struct ssd1306_dev_s *priv = (struct ssd1306_dev_s *)dev;
/* 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);
/* Draw the framebuffer */
return ssd1306_redrawfb(priv);
}
#endif /* CONFIG_LCD_SSD1306 */
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