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px4-firmware/nuttx/drivers/lcd/p14201.c

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/**************************************************************************************
* drivers/lcd/p14201.c
* Driver for RiT P14201 series display (wih sd1329 IC controller)
*
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
**************************************************************************************/
/**************************************************************************************
* Included Files
**************************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/spi.h>
#include <nuttx/lcd/lcd.h>
#include <nuttx/lcd/p14201.h>
#include <arch/irq.h>
#include "sd1329.h"
#ifdef CONFIG_LCD_P14201
/**************************************************************************************
* Pre-processor Definitions
**************************************************************************************/
/* Configuration **********************************************************************/
/* P14201 Configuration Settings:
*
* CONFIG_P14201_SPIMODE - Controls the SPI mode
* CONFIG_P14201_FREQUENCY - Define to use a different bus frequency
* CONFIG_P14201_NINTERFACES - Specifies the number of physical P14201 devices that
* will be supported.
* CONFIG_P14201_FRAMEBUFFER - If defined, accesses will be performed using an in-memory
* copy of the OLEDs GDDRAM. This cost of this buffer is 128 * 96 / 2 = 6Kb. If this
* is defined, then the driver will be fully functional. If not, then it will have the
* following limitations:
*
* - Reading graphics memory cannot be supported, and
* - All pixel writes must be aligned to byte boundaries.
*
* The latter limitation effectively reduces the 128x96 disply to 64x96.
*
* Required LCD driver settings:
* CONFIG_LCD_P14201 - Enable P14201 support
* CONFIG_LCD_MAXCONTRAST should be 255, but any value >0 and <=255 will be accepted.
* CONFIG_LCD_MAXPOWER must be 1
*
* Required SPI driver settings:
* CONFIG_SPI_CMDDATA - Include support for cmd/data selection.
*/
#ifndef CONFIG_SPI_CMDDATA
# error "CONFIG_SPI_CMDDATA must be defined in your NuttX configuration"
#endif
/* The P14201 spec says that is supports SPI mode 0,0 only. However,
* somtimes you need to tinker with these things.
*/
#ifndef CONFIG_P14201_SPIMODE
# define CONFIG_P14201_SPIMODE SPIDEV_MODE2
#endif
/* CONFIG_P14201_NINTERFACES determines the number of physical interfaces
* that will be supported.
*/
#ifndef CONFIG_P14201_NINTERFACES
# define CONFIG_P14201_NINTERFACES 1
#endif
#if CONFIG_P14201_NINTERFACES != 1
# error "This implementation supports only a single OLED device"
#endif
/* Check contrast selection */
#if !defined(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
/* Check power setting */
#if !defined(CONFIG_LCD_MAXPOWER)
# define CONFIG_LCD_MAXPOWER 1
#endif
#if CONFIG_LCD_MAXPOWER != 1
# warning "CONFIG_LCD_MAXPOWER exceeds supported maximum"
# undef CONFIG_LCD_MAXPOWER
# define CONFIG_LCD_MAXPOWER 1
#endif
/* Color is 4bpp greyscale with leftmost column contained in bits 7:4 */
#if defined(CONFIG_NX_DISABLE_4BPP) || !defined(CONFIG_NX_PACKEDMSFIRST)
# warning "4-bit, big-endian pixel support needed"
#endif
/* Define the CONFIG_LCD_RITDEBUG to enable detailed debug output (stuff you would
* never want to see unless you are debugging this file).
*
* Verbose debug must also be enabled
*/
#ifndef CONFIG_DEBUG
# undef CONFIG_DEBUG_VERBOSE
# undef CONFIG_DEBUG_GRAPHICS
#endif
#ifndef CONFIG_DEBUG_VERBOSE
# undef CONFIG_LCD_RITDEBUG
#endif
/* Color Properties *******************************************************************/
/* Display Resolution */
#define RIT_XRES 128
#define RIT_YRES 96
/* Color depth and format */
#define RIT_BPP 4
#define RIT_COLORFMT FB_FMT_Y4
/* Default contrast */
#define RIT_CONTRAST ((23 * (CONFIG_LCD_MAXCONTRAST+1) / 32) - 1)
/* Helper Macros **********************************************************************/
#define rit_sndcmd(p,b,l) rit_sndbytes(p,b,l,true);
#define rit_snddata(p,b,l) rit_sndbytes(p,b,l,false);
/* Debug ******************************************************************************/
#ifdef CONFIG_LCD_RITDEBUG
# define ritdbg(format, arg...) vdbg(format, ##arg)
#else
# define ritdbg(x...)
#endif
/**************************************************************************************
* Private Type Definition
**************************************************************************************/
/* This structure describes the state of this driver */
struct rit_dev_s
{
struct lcd_dev_s dev; /* Publically visible device structure */
FAR struct spi_dev_s *spi; /* Cached SPI device reference */
uint8_t contrast; /* Current contrast setting */
bool on; /* true: display is on */
};
/**************************************************************************************
* Private Function Protototypes
**************************************************************************************/
/* Low-level SPI helpers */
static inline void rit_configspi(FAR struct spi_dev_s *spi);
#ifdef CONFIG_SPI_OWNBUS
static inline void rit_select(FAR struct spi_dev_s *spi);
static inline void rit_deselect(FAR struct spi_dev_s *spi);
#else
static void rit_select(FAR struct spi_dev_s *spi);
static void rit_deselect(FAR struct spi_dev_s *spi);
#endif
static void rit_sndbytes(FAR struct rit_dev_s *priv, FAR const uint8_t *buffer,
size_t buflen, bool cmd);
static void rit_sndcmds(FAR struct rit_dev_s *priv, FAR const uint8_t *table);
/* LCD Data Transfer Methods */
static int rit_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer,
size_t npixels);
static int rit_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer,
size_t npixels);
/* LCD Configuration */
static int rit_getvideoinfo(FAR struct lcd_dev_s *dev,
FAR struct fb_videoinfo_s *vinfo);
static int rit_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 rit_getpower(struct lcd_dev_s *dev);
static int rit_setpower(struct lcd_dev_s *dev, int power);
static int rit_getcontrast(struct lcd_dev_s *dev);
static int rit_setcontrast(struct lcd_dev_s *dev, unsigned int contrast);
/**************************************************************************************
* Private Data
**************************************************************************************/
/* This is working memory allocated by the LCD driver for each LCD device
* and for each color plane. This memory will hold one raster line of data.
* The size of the allocated run buffer must therefore be at least
* (bpp * xres / 8). Actual alignment of the buffer must conform to the
* bitwidth of the underlying pixel type.
*
* If there are multiple planes, they may share the same working buffer
* because different planes will not be operate on concurrently. However,
* if there are multiple LCD devices, they must each have unique run buffers.
*/
static uint8_t g_runbuffer[RIT_XRES / 2];
/* CONFIG_P14201_FRAMEBUFFER - If defined, accesses will be performed using an in-memory
* copy of the OLEDs GDDRAM. This cost of this buffer is 128 * 64 / 2 = 4Kb. If this
* is defined, then the driver will be full functioned. If not, then:
*
* - Reading graphics memory cannot be supported, and
* - All pixel writes must be aligned to byte boundaries.
*/
#ifdef CONFIG_P14201_FRAMEBUFFER
static uint8_t g_framebuffer[RIT_YRES * RIT_XRES / 2];
#endif
/* This structure describes the overall LCD video controller */
static const struct fb_videoinfo_s g_videoinfo =
{
.fmt = RIT_COLORFMT, /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */
.xres = RIT_XRES, /* Horizontal resolution in pixel columns */
.yres = RIT_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 = rit_putrun, /* Put a run into LCD memory */
.getrun = rit_getrun, /* Get a run from LCD memory */
.buffer = (uint8_t*)g_runbuffer, /* Run scratch buffer */
.bpp = RIT_BPP, /* Bits-per-pixel */
};
/* This is the OLED driver instance (only a single device is supported for now) */
static struct rit_dev_s g_oleddev =
{
.dev =
{
/* LCD Configuration */
.getvideoinfo = rit_getvideoinfo,
.getplaneinfo = rit_getplaneinfo,
/* LCD RGB Mapping -- Not supported */
/* Cursor Controls -- Not supported */
/* LCD Specific Controls */
.getpower = rit_getpower,
.setpower = rit_setpower,
.getcontrast = rit_getcontrast,
.setcontrast = rit_setcontrast,
},
};
/* A table of magic initialization commands. This initialization sequence is
* derived from RiT Application Note for the P14201 (with a few tweaked values
* as discovered in some Luminary code examples).
*/
static const uint8_t g_initcmds[] =
{
3, SSD1329_CMD_LOCK, /* Set lock command */
SSD1329_LOCK_OFF, /* Disable locking */
SSD1329_NOOP,
2, SSD1329_SLEEP_ON, /* Matrix display OFF */
SSD1329_NOOP,
3, SSD1329_ICON_ALL, /* Set all ICONs to OFF */
SSD1329_ICON_OFF, /* OFF selection */
SSD1329_NOOP,
3, SSD1329_MUX_RATIO, /* Set MUX ratio */
95, /* 96 MUX */
SSD1329_NOOP,
3, SSD1329_SET_CONTRAST, /* Set contrast */
RIT_CONTRAST, /* Default contrast */
SSD1329_NOOP,
3, SSD1329_PRECHRG2_SPEED, /* Set second pre-charge speed */
(31 << 1) | SSD1329_PRECHRG2_DBL, /* Pre-charge speed == 32, doubled */
SSD1329_NOOP,
3, SSD1329_GDDRAM_REMAP, /* Set GDDRAM re-map */
(SSD1329_COM_SPLIT| /* Enable COM slip even/odd */
SSD1329_COM_REMAP| /* Enable COM re-map */
SSD1329_NIBBLE_REMAP), /* Enable nibble re-map */
SSD1329_NOOP,
3, SSD1329_VERT_START, /* Set Display Start Line */
0, /* Line = 0 */
SSD1329_NOOP,
3, SSD1329_VERT_OFFSET, /* Set Display Offset */
0, /* Offset = 0 */
SSD1329_NOOP,
2, SSD1329_DISP_NORMAL, /* Display mode normal */
SSD1329_NOOP,
3, SSD1329_PHASE_LENGTH, /* Set Phase Length */
1 | /* Phase 1 period = 1 DCLK */
(1 << 4), /* Phase 2 period = 1 DCLK */
SSD1329_NOOP,
3, SSD1329_FRAME_FREQ,
35, /* 35 DCLK's per row */
SSD1329_NOOP,
3, SSD1329_DCLK_DIV, /* Set Front Clock Divider / Oscillator Frequency */
2 | /* Divide ration = 3 */
(14 << 4), /* Oscillator Frequency, FOSC, setting */
SSD1329_NOOP,
17, SSD1329_GSCALE_LOOKUP, /* Look Up Table for Gray Scale Pulse width */
1, 2, 3, 4, 5, /* Value for GS1-5 level Pulse width */
6, 8, 10, 12, 14, /* Value for GS6-10 level Pulse width */
16, 19, 22, 26, 30, /* Value for GS11-15 level Pulse width */
SSD1329_NOOP,
3, SSD1329_PRECHRG2_PERIOD, /* Set Second Pre-charge Period */
1, /* 1 DCLK */
SSD1329_NOOP,
3, SSD1329_PRECHRG1_VOLT, /* Set First Precharge voltage, VP */
0x3f, /* 1.00 x Vcc */
SSD1329_NOOP,
0 /* Zero length command terminates table */
};
/* Turn the maxtrix display on (sleep mode off) */
static const uint8_t g_sleepoff[] =
{
SSD1329_SLEEP_OFF, /* Matrix display ON */
SSD1329_NOOP,
};
/* Turn the maxtrix display off (sleep mode on) */
static const uint8_t g_sleepon[] =
{
SSD1329_SLEEP_ON, /* Matrix display OFF */
SSD1329_NOOP,
};
/* Set horizontal increment mode */
static const uint8_t g_horzinc[] =
{
SSD1329_GDDRAM_REMAP,
(SSD1329_COM_SPLIT|SSD1329_COM_REMAP|SSD1329_NIBBLE_REMAP),
};
/* The following set a window that covers the entire display */
static const uint8_t g_setallcol[] =
{
SSD1329_SET_COLADDR,
0,
(RIT_XRES/2)-1
};
static const uint8_t g_setallrow[] =
{
SSD1329_SET_ROWADDR,
0,
RIT_YRES-1
};
/**************************************************************************************
* Private Functions
**************************************************************************************/
/**************************************************************************************
* Function: rit_configspi
*
* Description:
* Configure the SPI for use with the P14201
*
* Parameters:
* spi - Reference to the SPI driver structure
*
* Returned Value:
* None
*
* Assumptions:
*
**************************************************************************************/
static inline void rit_configspi(FAR struct spi_dev_s *spi)
{
#ifdef CONFIG_P14201_FREQUENCY
ritdbg("Mode: %d Bits: 8 Frequency: %d\n",
CONFIG_P14201_SPIMODE, CONFIG_P14201_FREQUENCY);
#else
ritdbg("Mode: %d Bits: 8\n", CONFIG_P14201_SPIMODE);
#endif
/* Configure SPI for the P14201. But only if we own the SPI bus. Otherwise, don't
* bother because it might change.
*/
#ifdef CONFIG_SPI_OWNBUS
SPI_SETMODE(spi, CONFIG_P14201_SPIMODE);
SPI_SETBITS(spi, 8);
#ifdef CONFIG_P14201_FREQUENCY
SPI_SETFREQUENCY(spi, CONFIG_P14201_FREQUENCY)
#endif
#endif
}
/**************************************************************************************
* Function: rit_select
*
* Description:
* Select the SPI, locking and re-configuring if necessary
*
* Parameters:
* spi - Reference to the SPI driver structure
*
* Returned Value:
* None
*
* Assumptions:
*
**************************************************************************************/
#ifdef CONFIG_SPI_OWNBUS
static inline void rit_select(FAR struct spi_dev_s *spi)
{
/* We own the SPI bus, so just select the chip */
SPI_SELECT(spi, SPIDEV_DISPLAY, true);
}
#else
static void rit_select(FAR struct spi_dev_s *spi)
{
/* Select P14201 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, true);
/* Now make sure that the SPI bus is configured for the P14201 (it
* might have gotten configured for a different device while unlocked)
*/
SPI_SETMODE(spi, CONFIG_P14201_SPIMODE);
SPI_SETBITS(spi, 8);
#ifdef CONFIG_P14201_FREQUENCY
SPI_SETFREQUENCY(spi, CONFIG_P14201_FREQUENCY);
#endif
}
#endif
/**************************************************************************************
* Function: rit_deselect
*
* Description:
* De-select the SPI
*
* Parameters:
* spi - Reference to the SPI driver structure
*
* Returned Value:
* None
*
* Assumptions:
*
**************************************************************************************/
#ifdef CONFIG_SPI_OWNBUS
static inline void rit_deselect(FAR struct spi_dev_s *spi)
{
/* We own the SPI bus, so just de-select the chip */
SPI_SELECT(spi, SPIDEV_DISPLAY, false);
}
#else
static void rit_deselect(FAR struct spi_dev_s *spi)
{
/* De-select P14201 chip and relinquish the SPI bus. */
SPI_SELECT(spi, SPIDEV_DISPLAY, false);
SPI_LOCK(spi, false);
}
#endif
/**************************************************************************************
* Function: rit_sndbytes
*
* Description:
* Send a sequence of command or data bytes to the SSD1329 controller.
*
* Parameters:
* spi - Reference to the SPI driver structure
* buffer - A reference to memory containing the command bytes to be sent.
* buflen - The number of command bytes in buffer to be sent
*
* Returned Value:
* None
*
* Assumptions:
* The caller as selected the OLED device.
*
**************************************************************************************/
static void rit_sndbytes(FAR struct rit_dev_s *priv, FAR const uint8_t *buffer,
size_t buflen, bool cmd)
{
FAR struct spi_dev_s *spi = priv->spi;
uint8_t tmp;
ritdbg("buflen: %d cmd: %s [%02x %02x %02x]\n",
buflen, cmd ? "YES" : "NO", buffer[0], buffer[1], buffer[2] );
DEBUGASSERT(spi);
/* Clear/set the D/Cn bit to enable command or data mode */
(void)SPI_CMDDATA(spi, SPIDEV_DISPLAY, cmd);
/* Loop until the entire command/data block is transferred */
while (buflen-- > 0)
{
/* Write the next byte to the controller */
tmp = *buffer++;
(void)SPI_SEND(spi, tmp);
}
}
/**************************************************************************************
* Function: rit_sndcmd
*
* Description:
* Send multiple commands from a table of commands.
*
* Parameters:
* spi - Reference to the SPI driver structure
* table - A reference to table containing all of the commands to be sent.
*
* Returned Value:
* None
*
* Assumptions:
*
**************************************************************************************/
static void rit_sndcmds(FAR struct rit_dev_s *priv, FAR const uint8_t *table)
{
int cmdlen;
/* Table terminates with a zero length command */
while ((cmdlen = *table++) != 0)
{
ritdbg("command: %02x cmdlen: %d\n", *table, cmdlen);
rit_sndcmd(priv, table, cmdlen);
table += cmdlen;
}
}
/**************************************************************************************
* Name: rit_clear
*
* Description:
* This method can be used to write a partial raster line to the LCD:
*
* rpriv - Reference to private driver structure
*
* Assumptions:
* Caller has selected the OLED section.
*
**************************************************************************************/
#ifdef CONFIG_P14201_FRAMEBUFFER
static inline void rit_clear(FAR struct rit_dev_s *priv)
{
FAR uint8_t *ptr = g_framebuffer;
unsigned int row;
ritdbg("Clear display\n");
/* Initialize the framebuffer */
memset(g_framebuffer, (RIT_Y4_BLACK << 4) | RIT_Y4_BLACK, RIT_YRES * RIT_XRES / 2);
/* Set a window to fill the entire display */
rit_sndcmd(priv, g_setallcol, sizeof(g_setallcol));
rit_sndcmd(priv, g_setallrow, sizeof(g_setallrow));
rit_sndcmd(priv, g_horzinc, sizeof(g_horzinc));
/* Display each row */
for(row = 0; row < RIT_YRES; row++)
{
/* Display a horizontal run */
rit_snddata(priv, ptr, RIT_XRES / 2);
ptr += RIT_XRES / 2;
}
}
#else
static inline void rit_clear(FAR struct rit_dev_s *priv)
{
unsigned int row;
ritdbg("Clear display\n");
/* Create a black row */
memset(g_runbuffer, (RIT_Y4_BLACK << 4) | RIT_Y4_BLACK, RIT_XRES / 2);
/* Set a window to fill the entire display */
rit_sndcmd(priv, g_setallcol, sizeof(g_setallcol));
rit_sndcmd(priv, g_setallrow, sizeof(g_setallrow));
rit_sndcmd(priv, g_horzinc, sizeof(g_horzinc));
/* Display each row */
for(row = 0; row < RIT_YRES; row++)
{
/* Display a horizontal run */
rit_snddata(priv, g_runbuffer, RIT_XRES / 2);
}
}
#endif
/**************************************************************************************
* Name: rit_putrun
*
* Description:
* This method can be used to write a partial raster line to the LCD:
*
* row - Starting row to write to (range: 0 <= row < yres)
* col - Starting column to write to (range: 0 <= col <= xres-npixels)
* buffer - The buffer containing the run to be written to the LCD
* npixels - The number of pixels to write to the LCD
* (range: 0 < npixels <= xres-col)
*
**************************************************************************************/
#ifdef CONFIG_P14201_FRAMEBUFFER
static int rit_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer,
size_t npixels)
{
FAR struct rit_dev_s *priv = (FAR struct rit_dev_s *)&g_oleddev;
uint8_t cmd[3];
uint8_t *run;
int start;
int end;
int aend;
int i;
ritdbg("row: %d col: %d npixels: %d\n", row, col, npixels);
DEBUGASSERT(buffer);
/* Toss out the special case of the empty run now */
if (npixels < 1)
{
return OK;
}
/* Get the beginning of the line containing run in the framebuffer */
run = g_framebuffer + row * RIT_XRES / 2;
/* Get the starting and ending byte offsets containing the run.
* the run starts at &run[start] and continues through run[end-1].
* However, the first and final pixels at these locations may
* not be byte aligned.
*/
start = col >> 1;
aend = (col + npixels) >> 1;
end = (col + npixels + 1) >> 1;
ritdbg("start: %d aend: %d end: %d\n", start, aend, end);
/* Copy the run into the framebuffer, handling nibble alignment.
*
* CASE 1: First pixel X position is byte aligned
*
* example col=6 npixels = 8 example col=6 npixels=7
*
* Run: |AB|AB|AB|AB| |AB|AB|AB|AB|
* GDDRAM row:
* Byte | 0| 1| 2| 3| 4| 5| 6| | 0| 1| 2| 3| 4| 5| 6|
* Pixel: |--|--|--|AB|AB|AB|AB| |--|--|--|AB|AB|AB|A-|
*
* start = 3 start = 3
* aend = 6 aend = 6
* end = 6 end = 7
*
*/
if ((col & 1) == 0)
{
/* Check for the special case of only 1 pixel being blitted */
if (npixels > 1)
{
/* Beginning of buffer is properly aligned, from start to aend */
memcpy(&run[start], buffer, aend - start);
}
/* An even number of byte-aligned pixel pairs have been written (where
* zero counts as an even number). If npixels was was odd (including
* npixels == 1), then handle the final, byte aligned pixel.
*/
if (aend != end)
{
/* The leftmost column is contained in source bits 7:4 and in
* destination bits 7:4
*/
run[aend] = (run[aend] & 0x0f) | (buffer[aend - start] & 0xf0);
}
}
/* CASE 2: First pixel X position is byte aligned
*
* example col=7 npixels = 8 example col=7 npixels=7
*
* Run: |AB|AB|AB|AB| |AB|AB|AB|AB|
* GDDRAM row:
* Byte | 0| 1| 2| 3| 4| 5| 6| 7| | 0| 1| 2| 3| 4| 5| 6|
* Pixel: |--|--|--|-A|BA|BA|BA|B-| |--|--|--|-A|BA|BA|BA|
*
* start = 3 start = 3
* aend = 7 aend = 7
* end = 8 end = 7
*/
else
{
uint8_t curr = buffer[0];
uint8_t last;
/* Handle the initial unaligned pixel. Source bits 7:4 into
* destination bits 3:0. In the special case of npixel == 1,
* this finished the job.
*/
run[start] = (run[start] & 0xf0) | (curr >> 4);
/* Now construct the rest of the bytes in the run (possibly special
* casing the final, partial byte below).
*/
for (i = start + 1; i < aend; i++)
{
/* bits 3:0 from previous byte to run bits 7:4;
* bits 7:4 of current byte to run bits 3:0
*/
last = curr;
curr = buffer[i-start];
run[i] = (last << 4) | (curr >> 4);
}
/* An odd number of unaligned pixel have been written (where npixels
* may have been as small as one). If npixels was was even, then handle
* the final, unaligned pixel.
*/
if (aend != end)
{
/* The leftmost column is contained in source bits 3:0 and in
* destination bits 7:4
*/
run[aend] = (run[aend] & 0x0f) | (curr << 4);
}
}
/* Select the SD1329 controller */
rit_select(priv->spi);
/* Setup a window that describes a run starting at the specified column
* and row, and ending at the column + npixels on the same row.
*/
cmd[0] = SSD1329_SET_COLADDR;
cmd[1] = start;
cmd[2] = end - 1;
rit_sndcmd(priv, cmd, 3);
cmd[0] = SSD1329_SET_ROWADDR;
cmd[1] = row;
cmd[2] = row;
rit_sndcmd(priv, cmd, 3);
/* Write the run to GDDRAM. */
rit_sndcmd(priv, g_horzinc, sizeof(g_horzinc));
rit_snddata(priv, &run[start], end - start);
/* De-select the SD1329 controller */
rit_deselect(priv->spi);
return OK;
}
#else
static int rit_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer,
size_t npixels)
{
FAR struct rit_dev_s *priv = (FAR struct rit_dev_s *)&g_oleddev;
uint8_t cmd[3];
ritdbg("row: %d col: %d npixels: %d\n", row, col, npixels);
DEBUGASSERT(buffer);
if (npixels > 0)
{
/* Check that the X and Y coordinates are within range */
DEBUGASSERT(col < RIT_XRES && (col + npixels) <= RIT_XRES && row < RIT_YRES);
/* Check that the X coordinates are aligned to 8-bit boundaries
* (this needs to get fixed somehow)
*/
DEBUGASSERT((col & 1) == 0 && (npixels & 1) == 0);
/* Select the SD1329 controller */
rit_select(priv->spi);
/* Setup a window that describes a run starting at the specified column
* and row, and ending at the column + npixels on the same row.
*/
cmd[0] = SSD1329_SET_COLADDR;
cmd[1] = col >> 1;
cmd[2] = ((col + npixels) >> 1) - 1;
rit_sndcmd(priv, cmd, 3);
cmd[0] = SSD1329_SET_ROWADDR;
cmd[1] = row;
cmd[2] = row;
rit_sndcmd(priv, cmd, 3);
/* Write the run to GDDRAM. */
rit_sndcmd(priv, g_horzinc, sizeof(g_horzinc));
rit_snddata(priv, buffer, npixels >> 1);
/* De-select the SD1329 controller */
rit_deselect(priv->spi);
}
return OK;
}
#endif
/**************************************************************************************
* Name: rit_getrun
*
* Description:
* This method can be used to read a partial raster line from the LCD:
*
* row - Starting row to read from (range: 0 <= row < yres)
* col - Starting column to read read (range: 0 <= col <= xres-npixels)
* buffer - The buffer in which to return the run read from the LCD
* npixels - The number of pixels to read from the LCD
* (range: 0 < npixels <= xres-col)
*
**************************************************************************************/
#ifdef CONFIG_P14201_FRAMEBUFFER
static int rit_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer,
size_t npixels)
{
uint8_t *run;
int start;
int end;
int aend;
int i;
ritdbg("row: %d col: %d npixels: %d\n", row, col, npixels);
DEBUGASSERT(buffer);
/* Can't read from OLED GDDRAM in SPI mode, but we can read from the framebuffer */
/* Toss out the special case of the empty run now */
if (npixels < 1)
{
return OK;
}
/* Get the beginning of the line containing run in the framebuffer */
run = g_framebuffer + row * RIT_XRES / 2;
/* Get the starting and ending byte offsets containing the run.
* the run starts at &run[start] and continues through run[end-1].
* However, the first and final pixels at these locations may
* not be byte aligned (see examples in putrun()).
*/
start = col >> 1;
aend = (col + npixels) >> 1;
end = (col + npixels + 1) >> 1;
/* Copy the run into the framebuffer, handling nibble alignment */
if ((col & 1) == 0)
{
/* Check for the special case of only 1 pixels being copied */
if (npixels > 1)
{
/* Beginning of buffer is properly aligned, from start to aend */
memcpy(buffer, &run[start], aend - start + 1);
}
/* Handle any final pixel (including the special case where npixels == 1). */
if (aend != end)
{
/* The leftmost column is contained in source bits 7:4 and in
* destination bits 7:4
*/
buffer[aend - start] = run[aend] & 0xf0;
}
}
else
{
uint8_t curr = run[start];
uint8_t last;
/* Now construct the rest of the bytes in the run (possibly special
* casing the final, partial byte below).
*/
for (i = start + 1; i < aend; i++)
{
/* bits 3:0 from previous byte to run bits 7:4;
* bits 7:4 of current byte to run bits 3:0
*/
last = curr;
curr = run[i];
*buffer++ = (last << 4) | (curr >> 4);
}
/* Handle any final pixel (including the special case where npixels == 1). */
if (aend != end)
{
/* The leftmost column is contained in source bits 3:0 and in
* destination bits 7:4
*/
*buffer = (curr << 4);
}
}
return OK;
}
#else
static int rit_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer,
size_t npixels)
{
/* Can't read from OLED GDDRAM in SPI mode */
return -ENOSYS;
}
#endif
/**************************************************************************************
* Name: rit_getvideoinfo
*
* Description:
* Get information about the LCD video controller configuration.
*
**************************************************************************************/
static int rit_getvideoinfo(FAR struct lcd_dev_s *dev,
FAR struct fb_videoinfo_s *vinfo)
{
DEBUGASSERT(dev && vinfo);
gvdbg("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: rit_getplaneinfo
*
* Description:
* Get information about the configuration of each LCD color plane.
*
**************************************************************************************/
static int rit_getplaneinfo(FAR struct lcd_dev_s *dev, unsigned int planeno,
FAR struct lcd_planeinfo_s *pinfo)
{
DEBUGASSERT(pinfo && planeno == 0);
gvdbg("planeno: %d bpp: %d\n", planeno, g_planeinfo.bpp);
memcpy(pinfo, &g_planeinfo, sizeof(struct lcd_planeinfo_s));
return OK;
}
/**************************************************************************************
* Name: rit_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 rit_getpower(FAR struct lcd_dev_s *dev)
{
FAR struct rit_dev_s *priv = (FAR struct rit_dev_s *)dev;
DEBUGASSERT(priv);
gvdbg("power: %s\n", priv->on ? "ON" : "OFF");
return priv->on ? CONFIG_LCD_MAXPOWER : 0;
}
/**************************************************************************************
* Name: rit_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 rit_setpower(struct lcd_dev_s *dev, int power)
{
struct rit_dev_s *priv = (struct rit_dev_s *)dev;
DEBUGASSERT(priv && (unsigned)power <= CONFIG_LCD_MAXPOWER && priv->spi);
gvdbg("power: %d\n", power);
/* Select the SD1329 controller */
rit_select(priv->spi);
/* Only two power settings -- 0: sleep on, 1: sleep off */
if (power > 0)
{
/* Re-initialize the SSD1329 controller */
rit_sndcmds(priv, g_initcmds);
/* Take the display out of sleep mode */
rit_sndcmd(priv, g_sleepoff, sizeof(g_sleepoff));
priv->on = true;
}
else
{
/* Put the display into sleep mode */
rit_sndcmd(priv, g_sleepon, sizeof(g_sleepon));
priv->on = false;
}
/* De-select the SD1329 controller */
rit_deselect(priv->spi);
return OK;
}
/**************************************************************************************
* Name: rit_getcontrast
*
* Description:
* Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST).
*
**************************************************************************************/
static int rit_getcontrast(struct lcd_dev_s *dev)
{
struct rit_dev_s *priv = (struct rit_dev_s *)dev;
gvdbg("contrast: %d\n", priv->contrast);
return priv->contrast;
}
/**************************************************************************************
* Name: rit_setcontrast
*
* Description:
* Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST).
*
**************************************************************************************/
static int rit_setcontrast(struct lcd_dev_s *dev, unsigned int contrast)
{
struct rit_dev_s *priv = (struct rit_dev_s *)dev;
uint8_t cmd[3];
gvdbg("contrast: %d\n", contrast);
DEBUGASSERT(contrast <= CONFIG_LCD_MAXCONTRAST);
/* Select the SD1329 controller */
rit_select(priv->spi);
/* Set new contrast */
cmd[0] = SSD1329_SET_CONTRAST;
cmd[1] = contrast;
cmd[2] = SSD1329_NOOP;
rit_sndcmd(priv, cmd, 3);
/* De-select the SD1329 controller */
rit_deselect(priv->spi);
priv->contrast = contrast;
return OK;
}
/**************************************************************************************
* Public Functions
**************************************************************************************/
/**************************************************************************************
* Name: rit_initialize
*
* Description:
* Initialize the P14201 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 throuh CONFIG_P14201_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 *rit_initialize(FAR struct spi_dev_s *spi, unsigned int devno)
{
FAR struct rit_dev_s *priv = (FAR struct rit_dev_s *)&g_oleddev;
DEBUGASSERT(devno == 0 && spi);
gvdbg("Initializing devno: %d\n", devno);
/* Driver state data */
priv->spi = spi;
priv->contrast = RIT_CONTRAST;
priv->on = false;
/* Select the SD1329 controller */
rit_configspi(spi);
rit_select(spi);
/* Clear the display */
rit_clear(priv);
/* Configure (but don't enable) the OLED */
rit_sndcmds(priv, g_initcmds);
/* De-select the SD1329 controller */
rit_deselect(spi);
return &priv->dev;
}
#endif /* CONFIG_LCD_P14201 */
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