ugfx/halext/drivers/gdispNokia6610/gdisp_lld.c

/*
    ChibiOS/RT - Copyright (C) 2012
                 Joel Bodenmann aka Tectu <joel@unormal.org>

    This file is part of ChibiOS-LCD-Driver.

    ChibiOS-LCD-Driver is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    ChibiOS-LCD-Driver is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/**
 * @file    gdispNokia6610/gdisp_lld.c
 * @brief   GDISP Graphics Driver subsystem low level driver source for the Nokia6610 display.
 *
 * @addtogroup GDISP
 * @{
 */

#include "ch.h"
#include "hal.h"
#include "gdisp.h"

#if HAL_USE_GDISP || defined(__DOXYGEN__)

/* Include the emulation code for things we don't support */
#include "gdisp_emulation.c"

/*===========================================================================*/
/* Driver local definitions.                                                 */
/*===========================================================================*/

/* Controller definitions */
#if defined(LCD_USE_GE8)
	#include "GE8.h"
#elif defined(LCD_USE_GE12)
	#include "GE12.h"
#else
	#error "gdispNokia6610: Either LCD_USE_GE8 or LCD_USE_GE12 must be defined depending on your controller"
#endif

/*===========================================================================*/
/* Driver exported variables.                                                */
/*===========================================================================*/

/*===========================================================================*/
/* Driver local variables.                                                   */
/*===========================================================================*/

/*===========================================================================*/
/* Driver local functions.                                                   */
/*===========================================================================*/

#include "gdisp_fonts.h"

#if defined(BOARD_OLIMEX_SAM7_EX256)
	#include "gdisp_lld_board_olimexsam7ex256.h"
#else
	/* Include the user supplied board definitions */
	#include "gdisp_lld_board.h"
#endif

#define gdisp_lld_write_command(cmd)		GDISP_LLD(write_spi)((cmd) & ~0x0100)
#define gdisp_lld_write_data(data)			GDISP_LLD(write_spi)((data) | 0x0100)

static __inline void gdisp_lld_setviewport(coord_t x, coord_t y, coord_t cx, coord_t cy) {
	gdisp_lld_write_command(CASET);			// Column address set
	gdisp_lld_write_data(x);
	gdisp_lld_write_data(x+cx-1);
	gdisp_lld_write_command(PASET);			// Page address set
	gdisp_lld_write_data(y);
	gdisp_lld_write_data(y+cy-1);
}

/*===========================================================================*/
/* Driver interrupt handlers.                                                */
/*===========================================================================*/

/*===========================================================================*/
/* Driver exported functions.                                                */
/*===========================================================================*/

/* ---- Required Routines ---- */
/*
	The following 2 routines are required.
	All other routines are optional.
*/

/**
 * @brief   Low level GDISP driver initialization.
 *
 * @notapi
 */
bool_t GDISP_LLD(init)(void) {
	/* Initialise your display */
	GDISP_LLD(init_board)();

	// Hardware reset
	GDISP_LLD(setpin_reset)(TRUE);
	chThdSleepMilliseconds(20);
	GDISP_LLD(setpin_reset)(FALSE);
	chThdSleepMilliseconds(20);

	#if defined(LCD_USE_GE8)
		#if 1
			gdisp_lld_write_command(DISCTL);		// Display control
			gdisp_lld_write_data(0x00);					// P1: 0x00 = 2 divisions, switching period=8 (default)
			gdisp_lld_write_data(0x20);					// P2: 0x20 = nlines/4 - 1 = 132/4 - 1 = 32)
			gdisp_lld_write_data(0x00);					// P3: 0x00 = no inversely highlighted lines
			gdisp_lld_write_command(COMSCN);		// COM scan
			gdisp_lld_write_data(1);					// P1: 0x01 = Scan 1->80, 160<-81
			gdisp_lld_write_command(OSCON);			// Internal oscilator ON
			gdisp_lld_write_command(SLPOUT);		// Sleep out
			gdisp_lld_write_command(PWRCTR);		// Power control
			gdisp_lld_write_data(0x0f);					// reference voltage regulator on, circuit voltage follower on, BOOST ON
			// Interesting - all the code seems to say this should be done. But my display doesn't want it!
			//gdisp_lld_write_command(DISINV);		// Inverse display
			gdisp_lld_write_command(DATCTL);		// Data control
			gdisp_lld_write_data(0x01);					// P1: 0x01 = page address inverted, column address normal, address scan in column direction
			gdisp_lld_write_data(0x00);					// P2: 0x00 = RGB sequence (default value)
			gdisp_lld_write_data(0x02);					// P3: 0x02 = Grayscale -> 16 (selects 12-bit color, type A)
			gdisp_lld_write_command(VOLCTR);		// Voltage control (contrast setting)
			gdisp_lld_write_data(32);					// P1 = 32 volume value (experiment with this value to get the best contrast)
			gdisp_lld_write_data(3);					// P2 = 3 resistance ratio (only value that works)
			chThdSleepMilliseconds(100);			// allow power supply to stabilize
			gdisp_lld_write_command(DISON);			// Turn on the display
		#else
			// Alternative
			gdisp_lld_write_command(DISCTL);		// Display control
			gdisp_lld_write_data(0x00);					// default
			gdisp_lld_write_data(0x20);					// (32 + 1) * 4 = 132 lines (of which 130 are visible)
			gdisp_lld_write_data(0x0a);					// default
			gdisp_lld_write_command(COMSCN);		// COM scan
			gdisp_lld_write_data(0x00);					// Scan 1-80
			gdisp_lld_write_command(OSCON);			// Internal oscilator ON
			chThdSleepMilliseconds(100);			// wait aproximetly 100ms
			gdisp_lld_write_command(SLPOUT);		// Sleep out
			gdisp_lld_write_command(VOLCTR);		// Voltage control
			gdisp_lld_write_data(0x1F);					// middle value of V1
			gdisp_lld_write_data(0x03);					// middle value of resistance value
			gdisp_lld_write_command(TMPGRD);		// Temperature gradient
			gdisp_lld_write_data(0x00);					// default
			gdisp_lld_write_command(PWRCTR);		// Power control
			gdisp_lld_write_data(0x0f);					// referance voltage regulator on, circuit voltage follower on, BOOST ON
			gdisp_lld_write_command(DISNOR);		// Normal display
			gdisp_lld_write_command(DISINV);		// Inverse display
			gdisp_lld_write_command(PTLOUT);		// Partial area off
			//  gdisp_lld_write_command(ASCSET);	// Scroll area set
			//  gdisp_lld_write_data(0);
			//  gdisp_lld_write_data(0);
			//  gdisp_lld_write_data(40);
			//  gdisp_lld_write_data(3);
			//  gdisp_lld_write_command(SCSTART);	// Vertical scrool address start
			//  gdisp_lld_write_data(0);
			gdisp_lld_write_command(DATCTL);		// Data control
			gdisp_lld_write_data(0x00);					// all inversions off, column direction
			gdisp_lld_write_data(0x03);					// RGB sequence
			gdisp_lld_write_data(0x02);					// Grayscale -> 16
			gdisp_lld_write_command(PASET);			// Page Address set
			gdisp_lld_write_data(0);
			gdisp_lld_write_data(131);
			gdisp_lld_write_command(CASET);			// Page Column set
			gdisp_lld_write_data(0);
			gdisp_lld_write_data(131);
			gdisp_lld_write_command(DISON);			// Turn on the display
		#endif

	#elif defined(LCD_USE_GE12)
		#if 1
			gdisp_lld_write_command(SLEEPOUT);		// Sleep out
			gdisp_lld_write_command(INVON);			// Inversion on: seems to be required for this controller
			gdisp_lld_write_command(COLMOD);		// Color Interface Pixel Format
			gdisp_lld_write_data(0x03);				// 0x03 = 12 bits-per-pixel
			gdisp_lld_write_command(MADCTL);		// Memory access controler
			gdisp_lld_write_data(0xC8);				// 0xC0 = mirror x and y, reverse rgb
			gdisp_lld_write_command(SETCON);		// Write contrast
			gdisp_lld_write_data(0x30);				// contrast - experiental value
			chThdSleepMilliseconds(20);
			gdisp_lld_write_command(DISPON);		// Display On
		#else
			// Alternative
			// Hardware reset commented out
			gdisp_lld_write_command(SOFTRST);		// Software Reset
			chThdSleepMilliseconds(20);
			gdisp_lld_write_command(INITESC);		// Initial escape
			chThdSleepMilliseconds(20);
			gdisp_lld_write_command(REFSET);		// Refresh set
			gdisp_lld_write_data(0);
			gdisp_lld_write_command(DISPCTRL);		// Set Display control
			gdisp_lld_write_data(128);					// Set the lenght of one selection term
			gdisp_lld_write_data(128);					// Set N inversion -> no N inversion
			gdisp_lld_write_data(134);					// Set frame frequence and bias rate -> 2 devision of frequency and 1/8 bias, 1/67 duty, 96x67 size
			gdisp_lld_write_data(84);					// Set duty parameter
			gdisp_lld_write_data(69);					// Set duty parameter
			gdisp_lld_write_data(82);					// Set duty parameter
			gdisp_lld_write_data(67);					// Set duty parameter
			gdisp_lld_write_command(GRAYSCALE0);	// Grey scale 0 position set - 15 parameters
			gdisp_lld_write_data(1);					// GCP1 - gray lavel to be output when the RAM data is "0001"
			gdisp_lld_write_data(2);					// GCP2 - gray lavel to be output when the RAM data is "0010"
			gdisp_lld_write_data(4);					// GCP3 - gray lavel to be output when the RAM data is "0011"
			gdisp_lld_write_data(8);					// GCP4 - gray lavel to be output when the RAM data is "0100"
			gdisp_lld_write_data(16);					// GCP5 - gray lavel to be output when the RAM data is "0101"
			gdisp_lld_write_data(30);					// GCP6 - gray lavel to be output when the RAM data is "0110"
			gdisp_lld_write_data(40);					// GCP7 - gray lavel to be output when the RAM data is "0111"
			gdisp_lld_write_data(50);					// GCP8 - gray lavel to be output when the RAM data is "1000"
			gdisp_lld_write_data(60);					// GCP9 - gray lavel to be output when the RAM data is "1001"
			gdisp_lld_write_data(70);					// GCP10 - gray lavel to be output when the RAM data is "1010"
			gdisp_lld_write_data(80);					// GCP11 - gray lavel to be output when the RAM data is "1011"
			gdisp_lld_write_data(90);					// GCP12 - gray lavel to be output when the RAM data is "1100"
			gdisp_lld_write_data(100);					// GCP13 - gray lavel to be output when the RAM data is "1101"
			gdisp_lld_write_data(110);					// GCP14 - gray lavel to be output when the RAM data is "1110"
			gdisp_lld_write_data(127);					// GCP15 - gray lavel to be output when the RAM data is "1111"
			gdisp_lld_write_command(GAMMA);				// Gamma curve set - select gray scale - GRAYSCALE 0 or GREYSCALE 1
			gdisp_lld_write_data(1);						// Select grey scale 0
			gdisp_lld_write_command(COMMONDRV);			// Command driver output
			gdisp_lld_write_data(0);						// Set COM1-COM41 side come first, normal mod
			gdisp_lld_write_command(NORMALMODE);		// Set Normal mode (my)
			// gdisp_lld_write_command(INVERSIONOFF);	// Inversion off
			gdisp_lld_write_command(COLADDRSET);		// Column address set
			gdisp_lld_write_data(0);
			gdisp_lld_write_data(131);
			gdisp_lld_write_command(PAGEADDRSET);		// Page address set
			gdisp_lld_write_data(0);
			gdisp_lld_write_data(131);
			gdisp_lld_write_command(ACCESSCTRL);		// Memory access controler
			gdisp_lld_write_data(0x40);						// horizontal
			//gdisp_lld_write_data(0x20);					// vertical
			gdisp_lld_write_command(PWRCTRL);			// Power control
			gdisp_lld_write_data(4);						// Internal resistance, V1OUT -> high power mode, oscilator devision rate
			gdisp_lld_write_command(SLEEPOUT);			// Sleep out
			gdisp_lld_write_command(VOLTCTRL);			// Voltage control - voltage control and write contrast define LCD electronic volume
			//gdisp_lld_write_data(0x7f);					//  full voltage control
			//gdisp_lld_write_data(0x03);					//  must be "1"
			gdisp_lld_write_command(CONTRAST);			// Write contrast
			gdisp_lld_write_data(0x3b);						// contrast
			chThdSleepMilliseconds(20);
			gdisp_lld_write_command(TEMPGRADIENT);		// Temperature gradient
			for(i=0; i<14; i++) gdisp_lld_write_data(0);
			gdisp_lld_write_command(BOOSTVON);			// Booster voltage ON
			gdisp_lld_write_command(DISPLAYON);			// Finally - Display On
		#endif
	#endif

	/* Turn on the back-light */
	GDISP_LLD(setpin_backlight)(TRUE);

	/* Initialise the GDISP structure to match */
	GDISP.Width = 132;
	GDISP.Height = 132;
	GDISP.Orientation = portrait;
	GDISP.Powermode = powerOn;
	GDISP.Backlight = 100;
	GDISP.Contrast = 50;
	return TRUE;
}

/**
 * @brief   Draws a pixel on the display.
 *
 * @param[in] x        X location of the pixel
 * @param[in] y        Y location of the pixel
 * @param[in] color    The color of the pixel
 *
 * @notapi
 */
void GDISP_LLD(drawpixel)(coord_t x, coord_t y, color_t color) {
	#if GDISP_NEED_VALIDATION
		if (x >= GDISP.Width || y >= GDISP.Height) return;
	#endif
	gdisp_lld_setviewport(x, y, 1, 1);
	gdisp_lld_write_command(RAMWR);
	gdisp_lld_write_data((color >> 4) & 0xFF);
	gdisp_lld_write_data((color << 4) & 0xF0);
	gdisp_lld_write_command(NOP);
}

/* ---- Optional Routines ---- */
/*
	All the below routines are optional.
	Defining them will increase speed but everything
	will work if they are not defined.
	If you are not using a routine - turn it off using
	the appropriate GDISP_HARDWARE_XXXX macro.
	Don't bother coding for obvious similar routines if
	there is no performance penalty as the emulation software
	makes a good job of using similar routines.
		eg. If fillarea() is defined there is little
			point in defining clear() unless the
			performance bonus is significant.
	For good performance it is suggested to implement
		fillarea() and blitarea().
*/

#if GDISP_HARDWARE_CLEARS || defined(__DOXYGEN__)
	/**
	 * @brief   Clear the display.
	 * @note    Optional - The high level driver can emulate using software.
	 *
	 * @param[in] color    The color of the pixel
	 *
	 * @notapi
	 */
	void GDISP_LLD(clear(color_t color) {
		/* NOT IMPLEMENTED */
		/* Nothing to be gained by implementing this
		 * as fillarea is just as fast.
		 */
	}
#endif

#if GDISP_HARDWARE_LINES || defined(__DOXYGEN__)
	/**
	 * @brief   Draw a line.
	 * @note    Optional - The high level driver can emulate using software.
	 *
	 * @param[in] x0, y0   The start of the line
	 * @param[in] x1, y1   The end of the line
	 * @param[in] color    The color of the line
	 *
	 * @notapi
	 */
	void GDISP_LLD(drawline)(coord_t x0, coord_t y0, coord_t x1, coord_t y1, color_t color) {
		/* NOT IMPLEMENTED */
	}
#endif

#if GDISP_HARDWARE_FILLS || defined(__DOXYGEN__)
	/**
	 * @brief   Fill an area with a color.
	 * @note    Optional - The high level driver can emulate using software.
	 *
	 * @param[in] x, y     The start filled area
	 * @param[in] cx, cy   The width and height to be filled
	 * @param[in] color    The color of the fill
	 *
	 * @notapi
	 */
	void GDISP_LLD(fillarea)(coord_t x, coord_t y, coord_t cx, coord_t cy, color_t color) {
		unsigned i, tuples;

		#if GDISP_NEED_VALIDATION
			if (cx < 1 || cy < 1 || x >= GDISP.Width || y >= GDISP.Height) return;
			if (x+cx > GDISP.Width)		cx = GDISP.Width - x;
			if (y+cy > GDISP.Height)	cy = GDISP.Height - y;
		#endif

		tuples = (cx*cy+1)/2;				// With an odd sized area we over-print by one pixel.
											// This extra pixel is ignored by the controller.

		gdisp_lld_setviewport(x, y, cx, cy);
		gdisp_lld_write_command(RAMWR);
		for(i=0; i < tuples; i++) {
			gdisp_lld_write_data((color >> 4) & 0xFF);
			gdisp_lld_write_data(((color << 4) & 0xF0)|((color >> 8) & 0x0F));
			gdisp_lld_write_data(color & 0xFF);
		}
	}
#endif

#if GDISP_HARDWARE_BITFILLS || defined(__DOXYGEN__)
	/**
	 * @brief   Fill an area with a bitmap.
	 * @note    Optional - The high level driver can emulate using software.
	 *
	 * @param[in] x, y     The start filled area
	 * @param[in] cx, cy   The width and height to be filled
	 * @param[in] buffer   The pixels to use to fill the area.
	 *
	 * @notapi
	 */
	void GDISP_LLD(blitarea)(coord_t x, coord_t y, coord_t cx, coord_t cy, const pixel_t *buffer) {
		unsigned i, area, tuples;
		#ifndef GDISP_PACKED_PIXELS
			color_t	c1, c2;
		#endif

		#if GDISP_NEED_VALIDATION
			if (cx < 1 || cy < 1 || x >= GDISP.Width || y >= GDISP.Height) return;
			if (x+cx > GDISP.Width) return;
			if (y+cy > GDISP.Height)	cy = GDISP.Height - y;
		#endif

		area = cx*cy;

		gdisp_lld_setviewport(x, y, cx, cy);
		gdisp_lld_write_command(RAMWR);

		#ifdef GDISP_PACKED_PIXELS
			// 3 bytes per 2 pixels + an extra 2 bytes if the total size is odd.
			// Note we can't just over-estimate this and let the controller handle the extra pixel
			//	as that might over-run our source buffer (very bad in some circumstances).
			tuples = (area/2)*3+(area & 0x01)*2;
			for(i=0; i < tuples; i++)
				gdisp_lld_write_data(*buffer++);
			if (area & 0x01)
				gdisp_lld_write_command(NOP);
		#else
			// Although this controller uses packed pixels we support unpacked pixel
			//  formats in this blit by packing the data as we feed it to the controller.
			tuples = area/2;
			for(i=0; i < tuples; i++) {
				c1 = *buffer++;
				c2 = *buffer++;
				gdisp_lld_write_data((c1 >> 4) & 0xFF);
				gdisp_lld_write_data(((c1 << 4) & 0xF0)|((c2 >> 8) & 0x0F));
				gdisp_lld_write_data(c2 & 0xFF);
			}
			if (area & 0x01) {
				c1 = *buffer++;
				gdisp_lld_write_data((c1 >> 4) & 0xFF);
				gdisp_lld_write_data((c1 << 4) & 0xF0);
				gdisp_lld_write_command(NOP);
			}
		#endif
	}
#endif

/* Circular Drawing Functions */
#if (GDISP_NEED_CIRCLE && GDISP_HARDWARE_CIRCLES) || defined(__DOXYGEN__)
	/**
	 * @brief   Draw a circle.
	 * @note    Optional - The high level driver can emulate using software.
	 * @note    If GDISP_NEED_CLIPPING is defined this routine MUST behave
	 *          correctly if the circle is over the edges of the screen.
	 *
	 * @param[in] x, y     The centre of the circle
	 * @param[in] radius   The radius of the circle
	 * @param[in] color    The color of the circle
	 *
	 * @notapi
	 */
	void GDISP_LLD(drawcircle)(coord_t x, coord_t y, coord_t radius, color_t color) {
		/* NOT IMPLEMENTED */
	}
#endif

#if (GDISP_NEED_CIRCLE && GDISP_HARDWARE_CIRCLEFILLS) || defined(__DOXYGEN__)
	/**
	 * @brief   Create a filled circle.
	 * @note    Optional - The high level driver can emulate using software.
	 * @note    If GDISP_NEED_CLIPPING is defined this routine MUST behave
	 *          correctly if the circle is over the edges of the screen.
	 *
	 * @param[in] x, y     The centre of the circle
	 * @param[in] radius   The radius of the circle
	 * @param[in] color    The color of the circle
	 *
	 * @notapi
	 */
	void GDISP_LLD(fillcircle)(coord_t x, coord_t y, coord_t radius, color_t color) {
		/* NOT IMPLEMENTED */
	}
#endif

#if (GDISP_NEED_ELLIPSE && GDISP_HARDWARE_ELLIPSES) || defined(__DOXYGEN__)
	/**
	 * @brief   Draw an ellipse.
	 * @note    Optional - The high level driver can emulate using software.
	 * @note    If GDISP_NEED_CLIPPING is defined this routine MUST behave
	 *          correctly if the ellipse is over the edges of the screen.
	 *
	 * @param[in] x, y     The centre of the ellipse
	 * @param[in] a, b     The dimensions of the ellipse
	 * @param[in] color    The color of the ellipse
	 *
	 * @notapi
	 */
	void GDISP_LLD(drawellipse)(coord_t x, coord_t y, coord_t a, coord_t b, color_t color) {
		/* NOT IMPLEMENTED */
	}
#endif

#if (GDISP_NEED_ELLIPSE && GDISP_HARDWARE_ELLIPSEFILLS) || defined(__DOXYGEN__)
	/**
	 * @brief   Create a filled ellipse.
	 * @note    Optional - The high level driver can emulate using software.
	 * @note    If GDISP_NEED_CLIPPING is defined this routine MUST behave
	 *          correctly if the ellipse is over the edges of the screen.
	 *
	 * @param[in] x, y     The centre of the ellipse
	 * @param[in] a, b     The dimensions of the ellipse
	 * @param[in] color    The color of the ellipse
	 *
	 * @notapi
	 */
	void GDISP_LLD(fillellipse)(coord_t x, coord_t y, coord_t a, coord_t b, color_t color) {
		/* NOT IMPLEMENTED */
	}
#endif

#if (GDISP_NEED_TEXT && GDISP_HARDWARE_TEXT) || defined(__DOXYGEN__)
	#include "gdisp_fonts.h"
#endif

#if (GDISP_NEED_TEXT && GDISP_HARDWARE_TEXT) || defined(__DOXYGEN__)
	/**
	 * @brief   Draw a character using a transparent background.
	 * @note    Optional - The high level driver can emulate using software.
	 *
	 * @param[in] x, y     The top-left corner of the text
	 * @param[in] c        The character to print
	 * @param[in] color    The color of the character
	 *
	 * @notapi
	 */
	void GDISP_LLD(drawchar)(coord_t x, coord_t y, char c, font_t font, color_t color) {
		/* NOT IMPLEMENTED */
	}
#endif

#if (GDISP_NEED_TEXT && GDISP_HARDWARE_TEXTFILLS) || defined(__DOXYGEN__)
	/**
	 * @brief   Draw a character using a filled background.
	 * @note    Optional - The high level driver can emulate using software.
	 *
	 * @param[in] x, y     The top-left corner of the text
	 * @param[in] c        The character to print
	 * @param[in] color    The color of the character
	 * @param[in] bgcolor  The background color
	 *
	 * @notapi
	 */
	void GDISP_LLD(fillchar)(coord_t x, coord_t y, char c, font_t font, color_t color, color_t bgcolor) {
		/* NOT IMPLEMENTED */
	}
#endif

#if (GDISP_NEED_PIXELREAD && GDISP_HARDWARE_PIXELREAD) || defined(__DOXYGEN__)
	/**
	 * @brief   Get the color of a particular pixel.
	 * @note    Optional.
	 * @note    If x,y is off the screen, the result is undefined.
	 *
	 * @param[in] x, y     The start of the text
	 *
	 * @notapi
	 */
	color_t GDISP_LLD(getpixelcolor)(coord_t x, coord_t y) {
		/* NOT IMPLEMENTED */
	}
#endif

#if (GDISP_NEED_SCROLL && GDISP_HARDWARE_SCROLL) || defined(__DOXYGEN__)
	/**
	 * @brief   Scroll vertically a section of the screen.
	 * @note    Optional.
	 * @note    If x,y + cx,cy is off the screen, the result is undefined.
	 * @note    If lines is >= cy, it is equivelent to a area fill with bgcolor.
	 *
	 * @param[in] x, y     The start of the area to be scrolled
	 * @param[in] cx, cy   The size of the area to be scrolled
	 * @param[in] lines    The number of lines to scroll (Can be positive or negative)
	 * @param[in] bgcolor  The color to fill the newly exposed area.
	 *
	 * @notapi
	 */
	void GDISP_LLD(verticalscroll)(coord_t x, coord_t y, coord_t cx, coord_t cy, int lines, color_t bgcolor) {
		/* NOT IMPLEMENTED */
	}
#endif

#if GDISP_HARDWARE_CONTROL || defined(__DOXYGEN__)
	/**
	 * @brief   Driver Control
	 * @detail	Unsupported control codes are ignored.
	 * @note	The value parameter should always be typecast to (void *).
	 * @note	There are some predefined and some specific to the low level driver.
	 * @note	GDISP_CONTROL_POWER			- Takes a gdisp_powermode_t
	 * 			GDISP_CONTROL_ORIENTATION	- Takes a gdisp_orientation_t
	 * 			GDISP_CONTROL_BACKLIGHT -	 Takes an int from 0 to 100. For a driver
	 * 											that only supports off/on anything other
	 * 											than zero is on.
	 * 			GDISP_CONTROL_CONTRAST		- Takes an int from 0 to 100.
	 * 			GDISP_CONTROL_LLD			- Low level driver control constants start at
	 * 											this value.
	 *
	 * @param[in] what		What to do.
	 * @param[in] value		The value to use (always cast to a void *).
	 *
	 * @notapi
	 */
	void GDISP_LLD(control)(int what, void *value) {
		/* NOT IMPLEMENTED YET */
		switch(what) {
		case GDISP_CONTROL_POWER:
			if (GDISP.Powermode == (gdisp_powermode_t)value)
				return;
			switch((gdisp_powermode_t)value) {
				case powerOff:
					/* 	Code here */
					break;
				case powerOn:
					/* 	Code here */
					/* You may need this ---
						if (GDISP.Powermode != powerSleep)
							GDISP_LLD(init();
					*/
					break;
				case powerSleep:
					/* 	Code here */
					break;
				default:
					return;
			}
			GDISP.Powermode = (gdisp_powermode_t)value;
			return;
		case GDISP_CONTROL_ORIENTATION:
			if (GDISP.Orientation == (gdisp_orientation_t)value)
				return;
	//		WriteSpiData(0x48); // no mirror Y (temporary to satisfy Olimex bmptoarray utility)
	//		WriteSpiData(0xC8); // restore to (mirror x and y, reverse rgb)
			switch((gdisp_orientation_t)value) {
				case portrait:
					/* 	Code here */
					GDISP.Height = SCREEN_HEIGHT;
					GDISP.Width = SCREEN_WIDTH;
					break;
				case landscape:
					/* 	Code here */
					GDISP.Height = SCREEN_WIDTH;
					GDISP.Width = SCREEN_HEIGHT;
					break;
				case portraitInv:
					/* 	Code here */
					GDISP.Height = SCREEN_HEIGHT;
					GDISP.Width = SCREEN_WIDTH;
					break;
				case landscapeInv:
					/* 	Code here */
					GDISP.Height = SCREEN_WIDTH;
					GDISP.Width = SCREEN_HEIGHT;
					break;
				default:
					return;
			}
			GDISP.Orientation = (gdisp_orientation_t)value;
			return;
/*
		case GDISP_CONTROL_BACKLIGHT:
		case GDISP_CONTROL_CONTRAST:
*/
		}
	}
#endif

#if (GDISP_NEED_QUERY && GDISP_HARDWARE_QUERY) || defined(__DOXYGEN__)
/**
 * @brief   Query a driver value.
 * @detail	Typecase the result to the type you want.
 * @note	GDISP_QUERY_WIDTH			- (coord_t)	Gets the width of the screen
 * 			GDISP_QUERY_HEIGHT			- (coord_t)	Gets the height of the screen
 * 			GDISP_QUERY_POWER			- (gdisp_powermode_t) Get the current powermode
 * 			GDISP_QUERY_ORIENTATION		- (gdisp_orientation_t) Get the current screen orientation
 * 			GDISP_QUERY_BACKLIGHT		- (coord_t) Get the backlight state (0 to 100)
 * 			GDISP_QUERY_CONTRAST		- (coord_t) Get the contrast (0 to 100).
 * 			GDISP_QUERY_LLD				- Low level driver control constants start at
 * 											this value.
 *
 * @param[in] what     What to Query
 *
 * @notapi
 */
void *GDISP_LLD(query)(unsigned what) {
	switch(what) {
	case GDISP_QUERY_WIDTH:			return (void *)(unsigned)GDISP.Width;
	case GDISP_QUERY_HEIGHT:		return (void *)(unsigned)GDISP.Height;
	case GDISP_QUERY_POWER:			return (void *)(unsigned)GDISP.Powermode;
	case GDISP_QUERY_ORIENTATION:	return (void *)(unsigned)GDISP.Orientation;
	case GDISP_QUERY_BACKLIGHT:		return (void *)(unsigned)GDISP.Backlight;
	case GDISP_QUERY_CONTRAST:		return (void *)(unsigned)GDISP.Contrast;
	case GDISP_QUERY_LLD+0:
		/* Code here */
	default:						return (void *)-1;
	}
}
#endif

#endif /* HAL_USE_GDISP */
/** @} */