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apache / nuttx / 1528b8dccab30450bf82e1363145c6679a64fd10 / . / drivers / lcd / ug-9664hswag01.c
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/****************************************************************************
* drivers/lcd/ug-9664hswag01.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 the Univision UG-9664HSWAG01 Display with the Solomon Systech
* SSD1305 LCD controller.
*
* Reference:
* "Product Specification, OEL Display Module, UG-9664HSWAG01", Univision
* Technology Inc., SAS1-6020-B, January 3, 2008.
*/
/****************************************************************************
* 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 <nuttx/lcd/ug-9664hswag01.h>
#include "ssd1305.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* UG-9664HSWAG01 Configuration Settings:
*
* CONFIG_UG9664HSWAG01_SPIMODE - Controls the SPI mode
* CONFIG_UG9664HSWAG01_FREQUENCY - Define to use a different bus frequency
* CONFIG_UG9664HSWAG01_NINTERFACES - Specifies the number of physical
* UG-9664HSWAG01 devices that will be supported. NOTE: At present, this
* must be undefined or defined to be 1.
* CONFIG_UG9664HSWAG01_POWER
* If the hardware supports a controllable OLED a power supply, this
* configuration should be defined. (See ug_power() below).
*
* Required LCD driver settings:
* CONFIG_LCD_UG9664HSWAG01 - Enable UG-9664HSWAG01 support
* CONFIG_LCD_MAXCONTRAST should be 255, but any value >0 and <=255
* will be accepted.
* CONFIG_LCD_MAXPOWER should be 2: 0=off, 1=dim, 2=normal
*
* Required SPI driver settings:
* CONFIG_SPI_CMDDATA - Include support for cmd/data selection.
*/
/* Verify that all configuration requirements have been met */
/* The UG-9664HSWAG01 spec says that is supports SPI mode 0,0 only.
* However, sometimes you need to tinker with these things.
*/
#ifndef CONFIG_UG9664HSWAG01_SPIMODE
# define CONFIG_UG9664HSWAG01_SPIMODE SPIDEV_MODE0
#endif
/* SPI frequency */
#ifndef CONFIG_UG9664HSWAG01_FREQUENCY
# define CONFIG_UG9664HSWAG01_FREQUENCY 3500000
#endif
/* CONFIG_UG9664HSWAG01_NINTERFACES determines the number of physical
* interfaces that will be supported.
*/
#ifndef CONFIG_UG9664HSWAG01_NINTERFACES
# define CONFIG_UG9664HSWAG01_NINTERFACES 1
#endif
#if CONFIG_UG9664HSWAG01_NINTERFACES != 1
# warning "Only a single UG-9664HSWAG01 interface is supported"
# undef CONFIG_UG9664HSWAG01_NINTERFACES
# define CONFIG_UG9664HSWAG01_NINTERFACES 1
#endif
/* Orientation */
#if defined(CONFIG_LCD_PORTRAIT) || defined(CONFIG_LCD_RPORTRAIT)
# warning "No support for portrait modes"
# define CONFIG_LCD_LANDSCAPE 1
# undef CONFIG_LCD_PORTRAIT
# undef CONFIG_LCD_RLANDSCAPE
# undef CONFIG_LCD_RPORTRAIT
#endif
/* Check contrast selection */
#ifndef CONFIG_LCD_MAXCONTRAST
# define CONFIG_LCD_MAXCONTRAST 255
#endif
#if CONFIG_LCD_MAXCONTRAST <= 0 || CONFIG_LCD_MAXCONTRAST > 255
# error "CONFIG_LCD_MAXCONTRAST exceeds supported maximum"
#endif
#if CONFIG_LCD_MAXCONTRAST < 255
# warning "Optimal setting of CONFIG_LCD_MAXCONTRAST is 255"
#endif
/* Check power setting */
#if !defined(CONFIG_LCD_MAXPOWER)
# define CONFIG_LCD_MAXPOWER 2
#endif
#if CONFIG_LCD_MAXPOWER != 2
# warning "CONFIG_LCD_MAXPOWER should be 2"
# undef CONFIG_LCD_MAXPOWER
# define CONFIG_LCD_MAXPOWER 2
#endif
/* The OLED requires CMD/DATA SPI support */
#ifndef CONFIG_SPI_CMDDATA
# error "CONFIG_SPI_CMDDATA must be defined in your NuttX configuration"
#endif
/* Color Properties *********************************************************/
/* The SSD1305 display controller can handle a resolution of 132x64. The OLED
* on the base board is 96x64.
*/
#define UG_DEV_XRES 132
#define UG_XOFFSET 18
/* Display Resolution */
#define UG_LCD_XRES 96
#define UG_LCD_YRES 64
#if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
# define UG_XRES UG_LCD_XRES
# define UG_YRES UG_LCD_YRES
#else
# define UG_XRES UG_LCD_YRES
# define UG_YRES UG_LCD_XRES
#endif
/* Color depth and format */
#define UG_BPP 1
#define UG_COLORFMT FB_FMT_Y1
/* Bytes per logical row and actual device row */
#define UG_XSTRIDE (UG_XRES >> 3) /* Pixels arrange "horizontally for user" */
#define UG_YSTRIDE (UG_YRES >> 3) /* But actual device arrangement is "vertical" */
/* The size of the shadow frame buffer */
#define UG_FBSIZE (UG_XRES * UG_YSTRIDE)
/* Orientation */
#if defined(CONFIG_LCD_LANDSCAPE)
# undef UG_LCD_REVERSEX
# undef UG_LCD_REVERSEY
#elif defined(CONFIG_LCD_RLANDSCAPE)
# define UG_LCD_REVERSEX 1
# define UG_LCD_REVERSEY 1
#endif
/* Bit helpers */
#define LS_BIT (1 << 0)
#define MS_BIT (1 << 7)
/****************************************************************************
* Private Type Definition
****************************************************************************/
/* This structure describes the state of this driver */
struct ug_dev_s
{
/* Publicly visible device structure */
struct lcd_dev_s dev;
/* Private LCD-specific information follows */
FAR struct spi_dev_s *spi;
uint8_t contrast;
uint8_t powered;
/* The SSD1305 does not support reading from the display memory in SPI
* mode.Since there is 1 BPP and access is byte-by-byte, it is
* necessary to keep a shadow copy of the framebuffer memory.
*/
uint8_t fb[UG_FBSIZE];
};
/****************************************************************************
* Private Function Protototypes
****************************************************************************/
/* SPI helpers */
static void ug_select(FAR struct spi_dev_s *spi);
static void ug_deselect(FAR struct spi_dev_s *spi);
/* LCD Data Transfer Methods */
static int ug_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 ug_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 ug_getvideoinfo(FAR struct lcd_dev_s *dev,
FAR struct fb_videoinfo_s *vinfo);
static int ug_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 ug_getpower(struct lcd_dev_s *dev);
static int ug_setpower(struct lcd_dev_s *dev, int power);
static int ug_getcontrast(struct lcd_dev_s *dev);
static int ug_setcontrast(struct lcd_dev_s *dev, unsigned int contrast);
/* Initialization */
static inline void up_clear(FAR struct ug_dev_s *priv);
/****************************************************************************
* 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 uint8_t g_runbuffer[UG_XSTRIDE + 1];
/* This structure describes the overall LCD video controller */
static const struct fb_videoinfo_s g_videoinfo =
{
.fmt = UG_COLORFMT, /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */
.xres = UG_XRES, /* Horizontal resolution in pixel columns */
.yres = UG_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 = ug_putrun, /* Put a run into LCD memory */
.getrun = ug_getrun, /* Get a run from LCD memory */
.buffer = (FAR uint8_t *)g_runbuffer, /* Run scratch buffer */
.bpp = UG_BPP, /* Bits-per-pixel */
};
/* This is the standard, NuttX LCD driver object */
static struct ug_dev_s g_ugdev =
{
.dev =
{
/* LCD Configuration */
.getvideoinfo = ug_getvideoinfo,
.getplaneinfo = ug_getplaneinfo,
/* LCD RGB Mapping -- Not supported */
/* Cursor Controls -- Not supported */
/* LCD Specific Controls */
.getpower = ug_getpower,
.setpower = ug_setpower,
.getcontrast = ug_getcontrast,
.setcontrast = ug_setcontrast,
},
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: ug_powerstring
*
* Description:
* Convert the power setting to a string.
*
****************************************************************************/
static inline FAR const char *ug_powerstring(uint8_t power)
{
if (power == UG_POWER_OFF)
{
return "OFF";
}
else if (power == UG_POWER_DIM)
{
return "DIM";
}
else if (power == UG_POWER_ON)
{
return "ON";
}
else
{
return "ERROR";
}
}
/****************************************************************************
* Name: ug_select
*
* Description:
* Select the SPI, locking and re-configuring if necessary
*
* Input Parameters:
* spi - Reference to the SPI driver structure
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
static void ug_select(FAR struct spi_dev_s *spi)
{
/* Select UG-9664HSWAG01 chip (locking the SPI bus in case there are
* multiple devices competing for the SPI bus
*/
SPI_LOCK(spi, true);
SPI_SELECT(spi, SPIDEV_DISPLAY(0), true);
/* Now make sure that the SPI bus is configured for the UG-9664HSWAG01 (it
* might have gotten configured for a different device while unlocked)
*/
SPI_SETMODE(spi, CONFIG_UG9664HSWAG01_SPIMODE);
SPI_SETBITS(spi, 8);
SPI_HWFEATURES(spi, 0);
#ifdef CONFIG_UG9664HSWAG01_FREQUENCY
SPI_SETFREQUENCY(spi, CONFIG_UG9664HSWAG01_FREQUENCY);
#endif
}
/****************************************************************************
* Name: ug_deselect
*
* Description:
* De-select the SPI
*
* Input Parameters:
* spi - Reference to the SPI driver structure
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
static void ug_deselect(FAR struct spi_dev_s *spi)
{
/* De-select UG-9664HSWAG01 chip and relinquish the SPI bus. */
SPI_SELECT(spi, SPIDEV_DISPLAY(0), false);
SPI_LOCK(spi, false);
}
/****************************************************************************
* Name: ug_putrun
*
* Description:
* This method can be used to write a partial raster line to the LCD:
*
* dev - The lcd device
* 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 ug_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 ug_dev_s *priv = (FAR struct ug_dev_s *)dev;
FAR uint8_t *fbptr;
FAR uint8_t *ptr;
uint8_t devcol;
uint8_t fbmask;
uint8_t page;
uint8_t usrmask;
uint8_t i;
int pixlen;
ginfo("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)UG_XRES)
{
pixlen = (int)UG_XRES - (int)col;
}
/* Verify that some portion of the run remains on the display */
if (pixlen <= 0 || row > UG_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 UG_LCD_REVERSEY
row = (UG_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 UG_LCD_REVERSEX
col = (UG_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 |
* --------+---+---+---+---+-...-+-----+
* Bit 0 | | X | | | | |
* Bit 1 | | X | | | | |
* Bit 2 | | X | | | | |
* Bit 3 | | X | | | | |
* Bit 4 | | X | | | | |
* Bit 5 | | X | | | | |
* Bit 6 | | X | | | | |
* Bit 7 | | 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 * UG_XRES + col];
#ifdef UG_LCD_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 UG_LCD_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 + UG_XOFFSET;
/* Select and lock the device */
ug_select(priv->spi);
/* Select command transfer */
SPI_CMDDATA(priv->spi, SPIDEV_DISPLAY(0), true);
/* Set the starting position for the run */
SPI_SEND(priv->spi, SSD1305_SETPAGESTART + page); /* Set the page start */
SPI_SEND(priv->spi, SSD1305_SETCOLL + (devcol & 0x0f)); /* Set the low column */
SPI_SEND(priv->spi, SSD1305_SETCOLH + (devcol >> 4)); /* Set the high column */
/* Select data transfer */
SPI_CMDDATA(priv->spi, SPIDEV_DISPLAY(0), false);
/* Then transfer all of the data */
SPI_SNDBLOCK(priv->spi, fbptr, pixlen);
/* Unlock and de-select the device */
ug_deselect(priv->spi);
return OK;
}
/****************************************************************************
* Name: ug_getrun
*
* Description:
* This method can be used to read a partial raster line from the LCD.
*
* dev - The lcd device
* 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 ug_getrun(FAR struct lcd_dev_s *dev,
fb_coord_t row, fb_coord_t col,
FAR uint8_t *buffer,
size_t npixels)
{
FAR struct ug_dev_s *priv = (FAR struct ug_dev_s *)dev;
FAR uint8_t *fbptr;
uint8_t page;
uint8_t fbmask;
uint8_t usrmask;
uint8_t i;
int pixlen;
ginfo("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)UG_XRES)
{
pixlen = (int)UG_XRES - (int)col;
}
/* Verify that some portion of the run is actually the display */
if (pixlen <= 0 || row > UG_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 UG_LCD_REVERSEY
row = (UG_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 UG_LCD_REVERSEX
col = (UG_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 |
* --------+---+---+---+---+-...-+-----+
* Bit 0 | | X | | | | |
* Bit 1 | | X | | | | |
* Bit 2 | | X | | | | |
* Bit 3 | | X | | | | |
* Bit 4 | | X | | | | |
* Bit 5 | | X | | | | |
* Bit 6 | | X | | | | |
* Bit 7 | | 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 * UG_XRES + col];
#ifdef CONFIG_LCD_PACKEDMSFIRST
usrmask = MS_BIT;
#else
usrmask = LS_BIT;
#endif
*buffer = 0;
for (i = 0; i < pixlen; i++)
{
/* Set or clear the corresponding bit */
#ifdef UG_LCD_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_LCD_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;
}
/****************************************************************************
* Name: ug_getvideoinfo
*
* Description:
* Get information about the LCD video controller configuration.
*
****************************************************************************/
static int ug_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: ug_getplaneinfo
*
* Description:
* Get information about the configuration of each LCD color plane.
*
****************************************************************************/
static int ug_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));
pinfo->dev = dev;
return OK;
}
/****************************************************************************
* Name: ug_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 ug_getpower(struct lcd_dev_s *dev)
{
struct ug_dev_s *priv = (struct ug_dev_s *)dev;
DEBUGASSERT(priv);
ginfo("powered: %s\n", ug_powerstring(priv->powered));
return priv->powered;
}
/****************************************************************************
* Name: ug_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 ug_setpower(struct lcd_dev_s *dev, int power)
{
struct ug_dev_s *priv = (struct ug_dev_s *)dev;
DEBUGASSERT(priv && (unsigned)power <= CONFIG_LCD_MAXPOWER);
ginfo("power: %s powered: %s\n",
ug_powerstring(power), ug_powerstring(priv->powered));
/* Select and lock the device */
ug_select(priv->spi);
if (power <= UG_POWER_OFF)
{
/* Turn the display off */
SPI_SEND(priv->spi, SSD1305_DISPOFF); /* Display off */
/* Remove power to the device */
ug_power(0, false);
priv->powered = UG_POWER_OFF;
}
else
{
/* Turn the display on, dim or normal */
if (power == UG_POWER_DIM)
{
SPI_SEND(priv->spi, SSD1305_DISPONDIM); /* Display on, dim mode */
}
else /* if (power > UG_POWER_DIM) */
{
SPI_SEND(priv->spi, SSD1305_DISPON); /* Display on, normal mode */
power = UG_POWER_ON;
}
SPI_SEND(priv->spi, SSD1305_DISPRAM); /* Resume to RAM content display */
/* Restore power to the device */
ug_power(0, true);
priv->powered = power;
}
ug_deselect(priv->spi);
return OK;
}
/****************************************************************************
* Name: ug_getcontrast
*
* Description:
* Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST).
*
****************************************************************************/
static int ug_getcontrast(struct lcd_dev_s *dev)
{
struct ug_dev_s *priv = (struct ug_dev_s *)dev;
DEBUGASSERT(priv);
return (int)priv->contrast;
}
/****************************************************************************
* Name: ug_setcontrast
*
* Description:
* Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST).
*
****************************************************************************/
static int ug_setcontrast(struct lcd_dev_s *dev, unsigned int contrast)
{
struct ug_dev_s *priv = (struct ug_dev_s *)dev;
ginfo("contrast: %d\n", contrast);
DEBUGASSERT(priv);
if (contrast > 255)
{
return -EINVAL;
}
/* Select and lock the device */
ug_select(priv->spi);
/* Select command transfer */
SPI_CMDDATA(priv->spi, SPIDEV_DISPLAY(0), true);
/* Set the contrast */
SPI_SEND(priv->spi, SSD1305_SETCONTRAST); /* Set contrast control register */
SPI_SEND(priv->spi, contrast); /* Data 1: Set 1 of 256 contrast steps */
priv->contrast = contrast;
/* Unlock and de-select the device */
ug_deselect(priv->spi);
return OK;
}
/****************************************************************************
* Name: up_clear
*
* Description:
* Clear the display.
*
****************************************************************************/
static inline void up_clear(FAR struct ug_dev_s *priv)
{
FAR struct spi_dev_s *spi = priv->spi;
int page;
int i;
/* Clear the framebuffer */
memset(priv->fb, UG_Y1_BLACK, UG_FBSIZE);
/* Select and lock the device */
ug_select(priv->spi);
/* Go through all 8 pages */
for (page = 0, i = 0; i < 8; i++)
{
/* Select command transfer */
SPI_CMDDATA(spi, SPIDEV_DISPLAY(0), true);
/* Set the starting position for the run */
SPI_SEND(priv->spi, SSD1305_SETPAGESTART + i);
SPI_SEND(priv->spi, SSD1305_SETCOLL + (UG_XOFFSET & 0x0f));
SPI_SEND(priv->spi, SSD1305_SETCOLH + (UG_XOFFSET >> 4));
/* Select data transfer */
SPI_CMDDATA(spi, SPIDEV_DISPLAY(0), false);
/* Then transfer all 96 columns of data */
SPI_SNDBLOCK(priv->spi, &priv->fb[page * UG_XRES], UG_XRES);
}
/* Unlock and de-select the device */
ug_deselect(spi);
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: ug_initialize
*
* Description:
* Initialize the UG-9664HSWAG01 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_UG9664HSWAG01_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.
*
****************************************************************************/
FAR struct lcd_dev_s *ug_initialize(FAR struct spi_dev_s *spi,
unsigned int devno)
{
/* Configure and enable LCD */
FAR struct ug_dev_s *priv = &g_ugdev;
ginfo("Initializing\n");
DEBUGASSERT(spi && devno == 0);
/* Save the reference to the SPI device */
priv->spi = spi;
/* Select and lock the device */
ug_select(spi);
/* Make sure that the OLED off */
ug_power(0, false);
/* Select command transfer */
SPI_CMDDATA(spi, SPIDEV_DISPLAY(0), true);
/* Configure the device */
SPI_SEND(spi, SSD1305_SETCOLL + 2); /* Set low column address */
SPI_SEND(spi, SSD1305_SETCOLH + 2); /* Set high column address */
SPI_SEND(spi, SSD1305_SETSTARTLINE + 0); /* Display start set */
SPI_SEND(spi, SSD1305_SCROLL_STOP); /* Stop horizontal scroll */
SPI_SEND(spi, SSD1305_SETCONTRAST); /* Set contrast control register */
SPI_SEND(spi, 0x32); /* Data 1: Set 1 of 256 contrast steps */
SPI_SEND(spi, SSD1305_SETBRIGHTNESS); /* Brightness for color bank */
SPI_SEND(spi, 0x80); /* Data 1: Set 1 of 256 contrast steps */
SPI_SEND(spi, SSD1305_MAPCOL131); /* Set segment re-map */
SPI_SEND(spi, SSD1305_DISPNORMAL); /* Set normal display */
/* (void)SPI_SEND(spi, SSD1305_DISPINVERTED); */ /* Set inverse display */
SPI_SEND(spi, SSD1305_SETMUX); /* Set multiplex ratio */
SPI_SEND(spi, 0x3f); /* Data 1: MUX ratio -1: 15-63 */
SPI_SEND(spi, SSD1305_SETOFFSET); /* Set display offset */
SPI_SEND(spi, 0x40); /* Data 1: Vertical shift by COM: 0-63 */
SPI_SEND(spi, SSD1305_MSTRCONFIG); /* Set dc-dc on/off */
SPI_SEND(spi, SSD1305_MSTRCONFIG_EXTVCC); /* Data 1: Select external Vcc */
SPI_SEND(spi, SSD1305_SETCOMREMAPPED); /* Set com output scan direction */
SPI_SEND(spi, SSD1305_SETDCLK); /* Set display clock divide
* ratio/oscillator/frequency */
SPI_SEND(spi, 15 << SSD1305_DCLKFREQ_SHIFT | 0 << SSD1305_DCLKDIV_SHIFT);
SPI_SEND(spi, SSD1305_SETCOLORMODE); /* Set area color mode on/off & low power
* display mode */
SPI_SEND(spi, SSD1305_COLORMODE_MONO | SSD1305_POWERMODE_LOW);
SPI_SEND(spi, SSD1305_SETPRECHARGE); /* Set pre-charge period */
SPI_SEND(spi, 15 << SSD1305_PHASE2_SHIFT | 1 << SSD1305_PHASE1_SHIFT);
SPI_SEND(spi, SSD1305_SETCOMCONFIG); /* Set COM configuration */
SPI_SEND(spi, SSD1305_COMCONFIG_ALT); /* Data 1, Bit 4: 1=Alternative COM pin configuration */
SPI_SEND(spi, SSD1305_SETVCOMHDESEL); /* Set VCOMH deselect level */
SPI_SEND(spi, SSD1305_VCOMH_X7P7); /* Data 1: ~0.77 x Vcc */
SPI_SEND(spi, SSD1305_SETLUT); /* Set look up table for area color */
SPI_SEND(spi, 0x3f); /* Data 1: Pulse width: 31-63 */
SPI_SEND(spi, 0x3f); /* Data 2: Color A: 31-63 */
SPI_SEND(spi, 0x3f); /* Data 3: Color B: 31-63 */
SPI_SEND(spi, 0x3f); /* Data 4: Color C: 31-63 */
SPI_SEND(spi, SSD1305_DISPON); /* Display on, normal mode */
SPI_SEND(spi, SSD1305_DISPRAM); /* Resume to RAM content display */
/* Let go of the SPI lock and de-select the device */
ug_deselect(spi);
/* Clear the framebuffer */
up_mdelay(100);
up_clear(priv);
return &priv->dev;
}