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|
/**************************************************************************************
* configs/sam3u-ek/src/sam_lcd.c
*
* Copyright (C) 2010-2011, 2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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.
*
**************************************************************************************/
/**************************************************************************************
* The SAM3U-EK developement board features a TFT/Transmissive color LCD module with
* touch-screen, FTM280C12D, with integratd driver IC HX8346. The LCD display size
* is 2.8 inches, with a native resolution of 240 x 320 pixels.
*
* LCD Module Pin Out: SAM3U PIO:
* -------------------------------------------- --------------------------------------
* Pin Symbol Function LCD PeriphA PeriphB Extra
* ---- ------ -------------------------------- -------------- -------- ------- ------
* 1 GND Ground N/A --- --- ---
* 2 CS Chip Select PC16 NCS2 PWML3 AD12BAD5
* 3 RS Register select signal PB8 (see A1) CTS0 A1 AD3
* 4 WR Write operation signal PB23 (NWE) NWR0/NEW PCK1 ---
* 5 RD Read operation signal PB19 (NRD) NRD PWML2 ---
* 6 DB0 Data bus PB9 D0 DTR0 ---
* 7 DB1 Data bus PB10 D1 DSR0 ---
* 8 DB2 Data bus PB11 D2 DCD0 ---
* 9 DB3 Data bus PB12 D3 RI0 ---
* 10 DB4 Data bus PB13 D4 PWMH0 ---
* 11 DB5 Data bus PB14 D5 PWMH1 ---
* 12 DB6 Data bus PB15 D6 PWMH2 ---
* 13 DB7 Data bus PB16 D7 PMWH3 ---
* 14 DB8 Data bus PB25 D8 PWML0 ---
* 15 DB9 Data bus PB26 D9 PWML1 ---
* 16 DB10 Data bus PB27 D10 PWML2 ---
* 17 DB11 Data bus PB28 D11 PWML3 ---
* 18 DB12 Data bus PB29 D12 --- ---
* 19 DB13 Data bus PB30 D13 --- ---
* 20 DB14 Data bus PB31 D14 --- ---
* 21 DB15 Data bus PB6 TIOA1 D15 AD1
* 22 NC No connection N/A --- --- ---
* 23 NC No connection N/A --- --- ---
* 24 RESET Reset signal N/A --- --- ---
* 25 GND Ground N/A --- --- ---
* 26 X+ Touch panel X_RIGHT PA15 SPCK PWMH2 ---
* 27 Y+ Touch panel Y_UP PA14 MOSI --- ---
* 28 X- Touch panel X_LEFT PA13 MISO --- ---
* 29 Y- Touch panel Y_DOWN PC14 A3 NPCS2 ---
* 30 GND Ground N/A --- --- ---
* 31 VDD1 Power supply for digital IO Pad N/A --- --- ---
* 32 VDD2 Power supply for analog circuit N/A --- --- ---
* 33 A1 Power supply for backlight PB8 (see RS) CTS0 A1 AD3
* 34 A2 Power supply for backlight N/A --- --- ---
* 35 A3 Power supply for backlight N/A --- --- ---
* 36 A4 Power supply for backlight N/A --- --- ---
* 37 NC No connection N/A --- --- ---
* 38 NC No connection N/A --- --- ---
* 39 K Backlight ground N/A --- --- ---
*
* The LCD module gets its reset from NRST. As explained previously, this NRST is
* shared with the JTAG port and the push button BP1. The LCD chip select signal is
* connected to NCS2 (a dedicated jumper can disable it, making NCS2 available for
* other custom usage).
*
* The SAM3U4E communicates with the LCD through PIOB where a 16-bit parallel
* 8080-like protocol data bus has to be implemented by software.
*
* LCD backlight is made of 4 white chip LEDs in parallel, driven by an AAT3194
* charge pump, MN4. The AAT3194 is controlled by the SAM3U4E through a single line
* Simple Serial Control (S2Cwire) interface, which permits to enable, disable, and
* set the LED drive current (LED brightness control) from a 32-level logarithmic
* scale. Four resistors R93/R94/R95/R96 are implemented for optional current
* limitation.
*
* The LCD module integrates a 4-wire touch screen panel controlled by
* MN5, ADS7843, which is a slave device on the SAM3U4E SPI bus. The ADS7843 touch
* ADC auxiliary inputs IN3/IN4 are connected to test points for optional function
* extension.
*
**************************************************************************************/
/**************************************************************************************
* 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/board.h>
#include <nuttx/lcd/lcd.h>
#include <nuttx/video/rgbcolors.h>
#include <arch/irq.h>
#include "up_arch.h"
#include "sam_gpio.h"
#include "chip/sam_pmc.h"
#include "chip/sam_smc.h"
#include "sam3u-ek.h"
/**************************************************************************************
* Pre-processor Definitions
**************************************************************************************/
/* Configuration **********************************************************************/
/* Define the following to enable register-level debug output */
#undef CONFIG_LCD_REGDEBUG
/* Verbose debug must also be enabled */
#ifndef CONFIG_DEBUG
# undef CONFIG_DEBUG_VERBOSE
# undef CONFIG_DEBUG_LED
#endif
#ifndef CONFIG_DEBUG_VERBOSE
# undef CONFIG_LCD_REGDEBUG
#endif
/* CONFIG_LCD_MAXCONTRAST -- must be defined and less than 32 */
#if !defined(CONFIG_LCD_MAXCONTRAST) || CONFIG_LCD_MAXCONTRAST < 1 || CONFIG_LCD_MAXCONTRAST > 31
# error "CONFIG_LCD_MAXCONTRAST must be defined in the range 1 to 31"
#endif
/* Debug ******************************************************************************/
#ifdef CONFIG_LCD_REGDEBUG
# define regdbg(format, ...) vdbg(format, ##__VA_ARGS__)
#else
# define regdbg(x...)
#endif
#ifdef CONFIG_DEBUG_LCD
# define lcddbg(format, ...) dbg(format, ##__VA_ARGS__)
# define lcdvdbg(format, ...) vdbg(format, ##__VA_ARGS__)
#else
# define lcddbg(x...)
# define lcdvdbg(x...)
#endif
/* Graphics Capbilities ***************************************************************/
/* LCD resolution: 320 (columns) by 240 (rows). The physical dimensions of the device
* are really 240 (columns) by 320 (rows), but unless CONFIG_LCD_PORTRAIT is defined,
* we swap rows and columns in setcursor to make things behave nicer (there IS a
* performance hit for this swap!).
*/
#ifdef CONFIG_LCD_PORTRAIT
# define SAM3UEK_XRES 240
# define SAM3UEK_YRES 320
#else
# define SAM3UEK_XRES 320
# define SAM3UEK_YRES 240
#endif
/* Color depth and format. BPP=16 R=6, G=6, B=5: RRRR RBBB BBBG GGGG */
#define SAM3UEK_BPP 16
#define SAM3UEK_RGBFMT FB_FMT_RGB16_565
/* HX834x Definitions ****************************************************************/
/* HX834x register select */
#define HX843X_LCD_RS (1 << 1)
/* HX8347 ID code */
#define HX8347_CHIPID 0x47
/* HX8347 LCD Registers */
#define HX8347_R00H 0x00
#define HX8347_R01H 0x01
#define HX8347_R02H 0x02
#define HX8347_R03H 0x03
#define HX8347_R04H 0x04
#define HX8347_R05H 0x05
#define HX8347_R06H 0x06
#define HX8347_R07H 0x07
#define HX8347_R08H 0x08
#define HX8347_R09H 0x09
#define HX8347_R0AH 0x0a
#define HX8347_R0CH 0x0c
#define HX8347_R0DH 0x0d
#define HX8347_R0EH 0x0e
#define HX8347_R0FH 0x0f
#define HX8347_R10H 0x10
#define HX8347_R11H 0x11
#define HX8347_R12H 0x12
#define HX8347_R13H 0x13
#define HX8347_R14H 0x14
#define HX8347_R15H 0x15
#define HX8347_R16H 0x16
#define HX8347_R18H 0x18
#define HX8347_R19H 0x19
#define HX8347_R1AH 0x1a
#define HX8347_R1BH 0x1b
#define HX8347_R1CH 0x1c
#define HX8347_R1DH 0x1d
#define HX8347_R1EH 0x1e
#define HX8347_R1FH 0x1f
#define HX8347_R20H 0x20
#define HX8347_R21H 0x21
#define HX8347_R22H 0x22
#define HX8347_R23H 0x23
#define HX8347_R24H 0x24
#define HX8347_R25H 0x25
#define HX8347_R26H 0x26
#define HX8347_R27H 0x27
#define HX8347_R28H 0x28
#define HX8347_R29H 0x29
#define HX8347_R2AH 0x2a
#define HX8347_R2BH 0x2b
#define HX8347_R2CH 0x2c
#define HX8347_R2DH 0x2d
#define HX8347_R35H 0x35
#define HX8347_R36H 0x36
#define HX8347_R37H 0x37
#define HX8347_R38H 0x38
#define HX8347_R39H 0x39
#define HX8347_R3AH 0x3a
#define HX8347_R3BH 0x3b
#define HX8347_R3CH 0x3c
#define HX8347_R3DH 0x3d
#define HX8347_R3EH 0x3e
#define HX8347_R40H 0x40
#define HX8347_R41H 0x41
#define HX8347_R42H 0x42
#define HX8347_R43H 0x43
#define HX8347_R44H 0x44
#define HX8347_R45H 0x45
#define HX8347_R46H 0x46
#define HX8347_R47H 0x47
#define HX8347_R48H 0x48
#define HX8347_R49H 0x49
#define HX8347_R4AH 0x4a
#define HX8347_R4BH 0x4b
#define HX8347_R4CH 0x4c
#define HX8347_R4DH 0x4d
#define HX8347_R4EH 0x4e
#define HX8347_R4FH 0x4f
#define HX8347_R50H 0x50
#define HX8347_R51H 0x51
#define HX8347_R64H 0x64
#define HX8347_R65H 0x65
#define HX8347_R66H 0x66
#define HX8347_R67H 0x67
#define HX8347_R70H 0x70
#define HX8347_R72H 0x72
#define HX8347_R90H 0x90
#define HX8347_R91H 0x91
#define HX8347_R93H 0x93
#define HX8347_R94H 0x94
#define HX8347_R95H 0x95
/**************************************************************************************
* Private Type Definition
**************************************************************************************/
/* This structure describes the state of this driver */
struct sam_dev_s
{
/* Publically visible device structure */
struct lcd_dev_s dev;
/* Private device state */
uint8_t power; /* The current power setting */
};
/**************************************************************************************
* Private Function Protototypes
**************************************************************************************/
/* Low-level HX834x Register access */
static void sam_putreg(uint16_t reg, uint16_t data);
#ifdef CONFIG_DEBUG_LCD
static uint16_t sam_getreg(uint16_t reg);
#endif
/* Misc. LCD Helper Functions */
static void sam_setcursor(fb_coord_t row, fb_coord_t col);
static inline void sam_wrsetup(void);
static inline void sam_wrram(uint16_t color);
static inline uint16_t sam_rdram(void);
static void sam_lcdon(void);
static void sam_lcdoff(void);
#if 0 /* CONFIG_DEBUG_LCD */
static void sam_dumpreg(uint8_t startreg, uint8_t endreg);
#endif
/* LCD Data Transfer Methods */
static int sam_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer,
size_t npixels);
static int sam_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer,
size_t npixels);
/* LCD Configuration */
static int sam_getvideoinfo(FAR struct lcd_dev_s *dev,
FAR struct fb_videoinfo_s *vinfo);
static int sam_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 sam_getpower(struct lcd_dev_s *dev);
static int sam_setpower(struct lcd_dev_s *dev, int power);
static int sam_getcontrast(struct lcd_dev_s *dev);
static int sam_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 therefor be at least
* (bpp * xres / 8). Actual alignment of the buffer must conform to the
* bitwidth of the underlying pixel type.
*
* If there are multiple planes, they may share the same working buffer
* because different planes will not be operate on concurrently. However,
* if there are multiple LCD devices, they must each have unique run buffers.
*/
static uint16_t g_runbuffer[SAM3UEK_XRES];
/* This structure describes the overall LCD video controller */
static const struct fb_videoinfo_s g_videoinfo =
{
.fmt = SAM3UEK_RGBFMT, /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */
.xres = SAM3UEK_XRES, /* Horizontal resolution in pixel columns */
.yres = SAM3UEK_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 = sam_putrun, /* Put a run into LCD memory */
.getrun = sam_getrun, /* Get a run from LCD memory */
.buffer = (uint8_t*)g_runbuffer, /* Run scratch buffer */
.bpp = SAM3UEK_BPP, /* Bits-per-pixel */
};
/* This is the standard, NuttX LCD driver object */
static struct sam_dev_s g_lcddev_s =
{
.dev =
{
/* LCD Configuration */
.getvideoinfo = sam_getvideoinfo,
.getplaneinfo = sam_getplaneinfo,
/* LCD RGB Mapping -- Not supported */
/* Cursor Controls -- Not supported */
/* LCD Specific Controls */
.getpower = sam_getpower,
.setpower = sam_setpower,
.getcontrast = sam_getcontrast,
.setcontrast = sam_setcontrast,
},
};
/**************************************************************************************
* Private Functions
**************************************************************************************/
/**************************************************************************************
* Name: sam_putreg
*
* Description:
* Write to a HX834x register
*
**************************************************************************************/
static void sam_putreg(uint16_t reg, uint16_t data)
{
regdbg("base: %08x RS: %04x data: %04x\n", LCD_BASE, LCD_BASE + HX843X_LCD_RS, data);
putreg16(reg, LCD_BASE);
putreg16(data, LCD_BASE + HX843X_LCD_RS);
}
/**************************************************************************************
* Name: sam_getreg
*
* Description:
* Read from a HX834x register
*
**************************************************************************************/
#ifdef CONFIG_DEBUG_LCD
static uint16_t sam_getreg(uint16_t reg)
{
uint16_t data;
putreg16(reg, LCD_BASE);
data = getreg16(LCD_BASE + HX843X_LCD_RS);
regdbg("base: %08x RS: %04x data: %04x\n", LCD_BASE, LCD_BASE + HX843X_LCD_RS, data);
return data;
}
#endif
/**************************************************************************************
* Name: sam_setcursor
*
* Description:
* Set the LCD cursor position.
*
**************************************************************************************/
static void sam_setcursor(fb_coord_t row, fb_coord_t col)
{
uint8_t x1;
uint8_t x2;
uint8_t y1;
uint8_t y2;
/* Get the upper and lower x and y positions */
x1 = (uint8_t)col;
x2 = (uint8_t)((uint16_t)col >> 8);
y1 = (uint8_t)row;
y2 = (uint8_t)((uint16_t)row >> 8);
/* Then set the cursor position */
sam_putreg(HX8347_R02H, x2); /* column high */
sam_putreg(HX8347_R03H, x1); /* column low */
sam_putreg(HX8347_R06H, y2); /* row high */
sam_putreg(HX8347_R07H, y1); /* row low */
}
/**************************************************************************************
* Name: sam_wrsetup
*
* Description:
* Set up for a GRAM write operation.
*
**************************************************************************************/
static inline void sam_wrsetup(void)
{
putreg16(HX8347_R22H, LCD_BASE);
}
/**************************************************************************************
* Name: sam_wrram
*
* Description:
* Write to the 16-bit GRAM register
*
**************************************************************************************/
static inline void sam_wrram(uint16_t color)
{
putreg16(color, LCD_BASE + HX843X_LCD_RS);
}
/**************************************************************************************
* Name: sam_rdram
*
* Description:
* Read from the 16-bit GRAM register
*
**************************************************************************************/
static inline uint16_t sam_rdram(void)
{
return getreg16(LCD_BASE + HX843X_LCD_RS);
}
/**************************************************************************************
* Name: sam_lcdon
*
* Description:
* Turn the LCD on
*
**************************************************************************************/
static void sam_lcdon(void)
{
/* Display ON Setting */
lcdvdbg("ON\n");
sam_putreg(HX8347_R90H, 0x7f); /* SAP=0111 1111 */
sam_putreg(HX8347_R26H, 0x04); /* GON=0 DTE=0 D=01 */
up_mdelay(100);
sam_putreg(HX8347_R26H, 0x24); /* GON=1 DTE=0 D=01 */
sam_putreg(HX8347_R26H, 0x2c); /* GON=1 DTE=0 D=11 */
up_mdelay(100);
sam_putreg(HX8347_R26H, 0x3c); /* GON=1 DTE=1 D=11 */
}
/**************************************************************************************
* Name: sam_lcdoff
*
* Description:
* Turn the LCD off
*
**************************************************************************************/
static void sam_lcdoff(void)
{
lcdvdbg("OFF\n");
sam_putreg(HX8347_R90H, 0x00); /* SAP=0000 0000 */
sam_putreg(HX8347_R26H, 0x00); /* GON=0 DTE=0 D=00 */
}
/**************************************************************************************
* Name: sam_dumpreg
*
* Description:
* Dump a range of LCD registers.
*
**************************************************************************************/
#if 0 /* CONFIG_DEBUG_LCD */
static void sam_dumpreg(uint8_t startreg, uint8_t endreg)
{
uint16_t value;
uint8_t addr;
for (addr = startreg; addr <= endreg; addr++)
{
value = sam_getreg(addr);
lcddbg(" %02x: %04x\n", addr, value);
}
}
#endif
/**************************************************************************************
* Name: sam_putrun
*
* Description:
* This method can be used to write a partial raster line to the LCD:
*
* row - Starting row to write to (range: 0 <= row < yres)
* col - Starting column to write to (range: 0 <= col <= xres-npixels)
* buffer - The buffer containing the run to be written to the LCD
* npixels - The number of pixels to write to the LCD
* (range: 0 < npixels <= xres-col)
*
**************************************************************************************/
static int sam_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer,
size_t npixels)
{
uint16_t *run = (uint16_t*)buffer;
unsigned int i;
/* Buffer must be provided and aligned to a 16-bit address boundary */
lcdvdbg("row: %d col: %d npixels: %d\n", row, col, npixels);
DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0);
#ifdef CONFIG_LCD_PORTRAIT
/* Set up to write the run. */
sam_setcursor(row, col);
sam_wrsetup();
/* Write the run to GRAM. */
for (i = 0; i < npixels; i++)
{
/* Write the pixel pixel to GRAM */
sam_wrram(*run++);
}
#else
/* Write the run to GRAM. Because rows and colums are swapped, we need to reset
* the cursor position for every pixel. We could do this much faster if we
* adapted to the strange device aspect ratio.
*/
col = 319-col;
for (i = 0; i < npixels; i++)
{
/* Set up to write the next pixel. Swapping x and y orientations so that the image
* comes out with the 320x240 aspect ratio (not the native 240x320). That is:
*
* row: 0-239 maps to x: 0-239
* col: 0-319 maps to y: 319-0
*/
sam_setcursor(col--, row);
sam_wrsetup();
/* Write the pixel pixel to GRAM */
sam_wrram(*run++);
}
#endif
return OK;
}
/**************************************************************************************
* Name: sam_getrun
*
* Description:
* This method can be used to read a partial raster line from the LCD:
*
* row - Starting row to read from (range: 0 <= row < yres)
* col - Starting column to read read (range: 0 <= col <= xres-npixels)
* buffer - The buffer in which to return the run read from the LCD
* npixels - The number of pixels to read from the LCD
* (range: 0 < npixels <= xres-col)
*
**************************************************************************************/
static int sam_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer,
size_t npixels)
{
uint16_t *run = (uint16_t*)buffer;
unsigned int i;
/* Buffer must be provided and aligned to a 16-bit address boundary */
lcdvdbg("row: %d col: %d npixels: %d\n", row, col, npixels);
DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0);
#ifdef CONFIG_LCD_PORTRAIT
/* Set up to read the run */
sam_setcursor(row, col);
/* Read the run from GRAM. */
for (i = 0; i < npixels; i++)
{
/* Read the next pixel */
*run++ = sam_rdram();
}
#else
/* Read the run from GRAM Because rows and colums are swapped, we need to reset
* the cursor position for every pixel. We could do this much faster if we
* adapted to the strange device aspect ratio.
*/
col = 319 - col;
for (i = 0; i < npixels; i++)
{
/* Read the next pixel.. Swapping x and y orientations so that the image
* comes out with the 320x240 aspect ratio (not the native 240x320). That is:
*
* row: 0-239 maps to x: 0-239
* col: 0-319 maps to y: 319-0
*/
sam_setcursor(col--, row);
*run++ = sam_rdram();
}
#endif
return OK;
}
/**************************************************************************************
* Name: sam_getvideoinfo
*
* Description:
* Get information about the LCD video controller configuration.
*
**************************************************************************************/
static int sam_getvideoinfo(FAR struct lcd_dev_s *dev,
FAR struct fb_videoinfo_s *vinfo)
{
DEBUGASSERT(dev && vinfo);
lcdvdbg("fmt: %d xres: %d yres: %d nplanes: %d\n",
g_videoinfo.fmt, g_videoinfo.xres, g_videoinfo.yres, g_videoinfo.nplanes);
memcpy(vinfo, &g_videoinfo, sizeof(struct fb_videoinfo_s));
return OK;
}
/**************************************************************************************
* Name: sam_getplaneinfo
*
* Description:
* Get information about the configuration of each LCD color plane.
*
**************************************************************************************/
static int sam_getplaneinfo(FAR struct lcd_dev_s *dev, unsigned int planeno,
FAR struct lcd_planeinfo_s *pinfo)
{
DEBUGASSERT(dev && pinfo && planeno == 0);
lcdvdbg("planeno: %d bpp: %d\n", planeno, g_planeinfo.bpp);
memcpy(pinfo, &g_planeinfo, sizeof(struct lcd_planeinfo_s));
return OK;
}
/**************************************************************************************
* Name: sam_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 sam_getpower(struct lcd_dev_s *dev)
{
struct sam_dev_s *priv = (struct sam_dev_s *)dev;
DEBUGASSERT(dev);
lcdvdbg("power: %d\n", priv->power);
return priv->power;
}
/**************************************************************************************
* Name: sam_setpower
*
* Description:
* Enable/disable LCD panel power (0: full off - CONFIG_LCD_MAXPOWERL: full on). On
* backlit LCDs, this setting may correspond to the backlight setting.
*
* LCD backlight is made of 4 white chip LEDs in parallel, driven by an AAT3194 charge
* pump, MN4. The AAT3194 is controlled by the SAM3U4E through a single line. Simple
* Serial Control (S2Cwire) interface, which permits to enable, disable, and set the
* LED drive current (LED brightness control) from a 32-level logarithmic scale. Four
* resistors R93/R94/R95/R96 are implemented for optional current limitation.
*
**************************************************************************************/
static int sam_setpower(struct lcd_dev_s *dev, int power)
{
struct sam_dev_s *priv = (struct sam_dev_s *)dev;
unsigned int i;
lcdvdbg("power: %d\n", power);
DEBUGASSERT(power <= CONFIG_LCD_MAXPOWER);
/* Switch off backlight */
sam_gpiowrite(GPIO_LCD_BKL, false);
/* For for at least 500uS to drain the charge pump */
up_udelay(500);
/* Set new backlight level by pumping "level" times */
for (i = 0; i < power; i++)
{
sam_gpiowrite(GPIO_LCD_BKL, false);
sam_gpiowrite(GPIO_LCD_BKL, false);
sam_gpiowrite(GPIO_LCD_BKL, false);
sam_gpiowrite(GPIO_LCD_BKL, true);
sam_gpiowrite(GPIO_LCD_BKL, true);
sam_gpiowrite(GPIO_LCD_BKL, true);
}
/* This delay seems to be required... perhaps because of the big current jump? */
if (power != LCD_FULL_OFF)
{
up_mdelay(100);
}
priv->power = power;
return OK;
}
/**************************************************************************************
* Name: sam_getcontrast
*
* Description:
* Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST).
*
**************************************************************************************/
static int sam_getcontrast(struct lcd_dev_s *dev)
{
lcdvdbg("Not implemented\n");
return -ENOSYS;
}
/**************************************************************************************
* Name: sam_getcontrast
*
* Description:
* Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST).
*
**************************************************************************************/
static int sam_setcontrast(struct lcd_dev_s *dev, unsigned int contrast)
{
lcdvdbg("contrast: %d\n", contrast);
return -ENOSYS;
}
/**************************************************************************************
* Public Functions
**************************************************************************************/
/**************************************************************************************
* Name: board_lcd_initialize
*
* Description:
* Initialize the LCD video hardware. The initial state of the LCD is fully
* initialized, display memory cleared, and the LCD ready to use, but with the power
* setting at 0 (full off).
*
**************************************************************************************/
int board_lcd_initialize(void)
{
#ifdef CONFIG_DEBUG_LCD
uint16_t hxregval;
#endif
uint32_t regval;
unsigned int i;
lcdvdbg("Initializing\n");
/* Enable LCD EXTCS2 pins */
sam_configgpio(GPIO_LCD_NCS2);
sam_configgpio(GPIO_LCD_RS);
sam_configgpio(GPIO_LCD_NWE);
sam_configgpio(GPIO_LCD_NRD);
sam_configgpio(GPIO_LCD_D0);
sam_configgpio(GPIO_LCD_D1);
sam_configgpio(GPIO_LCD_D2);
sam_configgpio(GPIO_LCD_D3);
sam_configgpio(GPIO_LCD_D4);
sam_configgpio(GPIO_LCD_D5);
sam_configgpio(GPIO_LCD_D6);
sam_configgpio(GPIO_LCD_D7);
sam_configgpio(GPIO_LCD_D8);
sam_configgpio(GPIO_LCD_D9);
sam_configgpio(GPIO_LCD_D10);
sam_configgpio(GPIO_LCD_D11);
sam_configgpio(GPIO_LCD_D12);
sam_configgpio(GPIO_LCD_D13);
sam_configgpio(GPIO_LCD_D14);
sam_configgpio(GPIO_LCD_D15);
#ifdef CONFIG_LCD_REGDEBUG
sam_dumpgpio(GPIO_PORT_PIOB, "PORTB");
sam_dumpgpio(GPIO_PORT_PIOC, "PORTC");
#endif
/* Configure LCD Backlight Pin */
sam_configgpio(GPIO_LCD_BKL);
/* Enable SMC peripheral clock */
putreg32((1 << SAM_PID_SMC), SAM_PMC_PCER);
regdbg("PMC PCSR: %08x SMC: %08x\n", getreg32(SAM_PMC_PCSR), (1 << SAM_PID_SMC));
/* Configure SMC CS2 */
regval = (4 << SMCCS_SETUP_NWESETUP_SHIFT) | (2 << SMCCS_SETUP_NCSWRSETUP_SHIFT) |
(4 << SMCCS_SETUP_NRDSETUP_SHIFT) | (2 << SMCCS_SETUP_NCSRDSETUP_SHIFT);
putreg32(regval, SAM_SMCCS_SETUP(2));
regval = (5 << SMCCS_PULSE_NWEPULSE_SHIFT) | (18 << SMCCS_PULSE_NCSWRPULSE_SHIFT) |
(5 << SMCCS_PULSE_NRDPULSE_SHIFT) | (18 << SMCCS_PULSE_NCSRDPULSE_SHIFT);
putreg32(regval, SAM_SMCCS_PULSE(2));
regval = (22 << SMCCS_CYCLE_NWECYCLE_SHIFT) | (22 << SMCCS_CYCLE_NRDCYCLE_SHIFT);
putreg32(regval, SAM_SMCCS_CYCLE(2));
regval = getreg32(SAM_SMCCS_MODE(2));
regval &= ~(SMCCS_MODE_DBW_MASK | SMCCS_MODE_PMEN);
regval |= (SMCCS_MODE_READMODE) | (SMCCS_MODE_WRITEMODE) | (SMCCS_MODE_DBW_16BITS);
putreg32(regval, SAM_SMCCS_MODE(2));
regdbg("SMC SETUP[%08x]: %08x PULSE[%08x]: %08x\n",
SAM_SMCCS_SETUP(2), getreg32(SAM_SMCCS_SETUP(2)),
SAM_SMCCS_PULSE(2), getreg32(SAM_SMCCS_PULSE(2)));
regdbg(" CYCLE[%08x]: %08x MODE[%08x]: %08x\n",
SAM_SMCCS_CYCLE(2), getreg32(SAM_SMCCS_CYCLE(2)),
SAM_SMCCS_MODE(2), getreg32(SAM_SMCCS_MODE(2)));
/* Check HX8347 Chip ID */
#ifdef CONFIG_DEBUG_LCD
hxregval = sam_getreg(HX8347_R67H);
lcdvdbg("Chip ID: %04x\n", hxregval);
if (hxregval != HX8347_CHIPID)
{
lcddbg("Bad chip ID: %04x Expected: %04x\n", hxregval, HX8347_CHIPID);
return -ENODEV;
}
#endif
/* Initialize LCD controller (HX8347) -- Magic code from Atmel LCD example */
/* Start internal OSC */
sam_putreg(HX8347_R19H, 0x49); /* OSCADJ=10 0000 OSD_EN=1 60Hz */
sam_putreg(HX8347_R93H, 0x0C); /* RADJ=1100 */
/* Power on flow */
sam_putreg(HX8347_R44H, 0x4D); /* VCM=100 1101 */
sam_putreg(HX8347_R45H, 0x11); /* VDV=1 0001 */
sam_putreg(HX8347_R20H, 0x40); /* BT=0100 */
sam_putreg(HX8347_R1DH, 0x07); /* VC1=111 */
sam_putreg(HX8347_R1EH, 0x00); /* VC3=000 */
sam_putreg(HX8347_R1FH, 0x04); /* VRH=0100 */
sam_putreg(HX8347_R1CH, 0x04); /* AP=100 */
sam_putreg(HX8347_R1BH, 0x10); /* GASENB=0 PON=1 DK=0 XDK=0 DDVDH_TRI=0 STB=0 */
up_mdelay(50);
sam_putreg(HX8347_R43H, 0x80); /* Set VCOMG=1 */
up_mdelay(50);
/* Gamma for CMO 2.8 */
sam_putreg(HX8347_R46H, 0x95);
sam_putreg(HX8347_R47H, 0x51);
sam_putreg(HX8347_R48H, 0x00);
sam_putreg(HX8347_R49H, 0x36);
sam_putreg(HX8347_R4AH, 0x11);
sam_putreg(HX8347_R4BH, 0x66);
sam_putreg(HX8347_R4CH, 0x14);
sam_putreg(HX8347_R4DH, 0x77);
sam_putreg(HX8347_R4EH, 0x13);
sam_putreg(HX8347_R4FH, 0x4c);
sam_putreg(HX8347_R50H, 0x46);
sam_putreg(HX8347_R51H, 0x46);
/* 240x320 window setting */
sam_putreg(HX8347_R02H, 0x00); /* Column address start2 */
sam_putreg(HX8347_R03H, 0x00); /* Column address start1 */
sam_putreg(HX8347_R04H, 0x00); /* Column address end2 */
sam_putreg(HX8347_R05H, 0xef); /* Column address end1 */
sam_putreg(HX8347_R06H, 0x00); /* Row address start2 */
sam_putreg(HX8347_R07H, 0x00); /* Row address start1 */
sam_putreg(HX8347_R08H, 0x01); /* Row address end2 */
sam_putreg(HX8347_R09H, 0x3f); /* Row address end1 */
/* Display Setting */
sam_putreg(HX8347_R01H, 0x06); /* IDMON=0 INVON=1 NORON=1 PTLON=0 */
sam_putreg(HX8347_R16H, 0xc8); /* MY=1 MX=1 MV=0 BGR=1 */
sam_putreg(HX8347_R23H, 0x95); /* N_DC=1001 0101 */
sam_putreg(HX8347_R24H, 0x95); /* P_DC=1001 0101 */
sam_putreg(HX8347_R25H, 0xff); /* I_DC=1111 1111 */
sam_putreg(HX8347_R27H, 0x06); /* N_BP=0000 0110 */
sam_putreg(HX8347_R28H, 0x06); /* N_FP=0000 0110 */
sam_putreg(HX8347_R29H, 0x06); /* P_BP=0000 0110 */
sam_putreg(HX8347_R2AH, 0x06); /* P_FP=0000 0110 */
sam_putreg(HX8347_R2CH, 0x06); /* I_BP=0000 0110 */
sam_putreg(HX8347_R2DH, 0x06); /* I_FP=0000 0110 */
sam_putreg(HX8347_R3AH, 0x01); /* N_RTN=0000 N_NW=001 */
sam_putreg(HX8347_R3BH, 0x01); /* P_RTN=0000 P_NW=001 */
sam_putreg(HX8347_R3CH, 0xf0); /* I_RTN=1111 I_NW=000 */
sam_putreg(HX8347_R3DH, 0x00); /* DIV=00 */
sam_putreg(HX8347_R3EH, 0x38); /* SON=38h */
sam_putreg(HX8347_R40H, 0x0f); /* GDON=0Fh */
sam_putreg(HX8347_R41H, 0xf0); /* GDOF=F0h */
/* Set LCD backlight to FULL off */
sam_setpower(&g_lcddev_s.dev, LCD_FULL_OFF);
/* Fill the display memory with the color BLACK */
sam_setcursor(0, 0);
sam_wrsetup();
for (i = 0; i < (SAM3UEK_XRES * SAM3UEK_YRES); i++)
{
sam_wrram(RGB16_BLACK);
}
/* Turn the LCD on (but with the backlight off) */
sam_lcdon();
return OK;
}
/**************************************************************************************
* Name: board_lcd_getdev
*
* Description:
* Return a a reference to the LCD object for the specified LCD. This allows
* support for multiple LCD devices.
*
**************************************************************************************/
FAR struct lcd_dev_s *board_lcd_getdev(int lcddev)
{
lcdvdbg("lcddev: %d\n", lcddev);
return lcddev == 0 ? &g_lcddev_s.dev : NULL;
}
/**************************************************************************************
* Name: board_lcd_uninitialize
*
* Description:
* Unitialize the framebuffer support.
*
**************************************************************************************/
void board_lcd_uninitialize(void)
{
/* Turn the LCD off */
sam_lcdoff();
/* Set LCD backlight to FULL off */
sam_setpower(&g_lcddev_s.dev, LCD_FULL_OFF);
/* Disable SMC peripheral clock */
putreg32((1 << SAM_PID_SMC), SAM_PMC_PCDR);
}
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