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1.44 tft lcd display
Dependencies: TFT_fonts mbed-os
Fork of newTFTLCD by
Diff: hx8340bs.h
- Revision:
- 4:3ac4239f6c9c
- Child:
- 5:09b6d228ceea
diff -r 64a5b67d5b51 -r 3ac4239f6c9c hx8340bs.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/hx8340bs.h Sun Dec 02 05:44:52 2012 +0000 @@ -0,0 +1,173 @@ +/** \file hx8340b.h + * \brief mbed TFT LCD controller for displays with the HX8340-B IC (serial interface). + * \copyright GNU Public License, v2. or later + * + * A known display with this type of controller chip is the ITDB02-2.2SP + * from http://imall.iteadstudio.com + * + * This library is based on the Arduino/chipKIT UTFT library by Henning + * Karlsen, http://henningkarlsen.com/electronics/library.php?id=52 + * + * Copyright (C)2010-2012 Henning Karlsen. All right reserved. + * Copyright (C)2012 Todor Todorov. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to: + * + * Free Software Foundation, Inc. + * 51 Franklin St, 5th Floor, Boston, MA 02110-1301, USA + * + *********************************************************************/ +#ifndef TFTLCD_HX8340B_H +#define TFTLCD_HX8340B_H + +#include "lcd_base.h" + +/** Represents a LCD instance. + * + * This is the utility class, through which the display can be manipulated + * and graphics objects can be shown to the user. A known display, which + * works with this library is the ITDB02-2.2SP from iTeadStudio - a RGB TFT + * with 176x220 pixels resolution and 65K/256K colors, using serial interface. + * + * The display needs 4 or 5 pins to work with mbed. As it uses +3.3V for power + * and logic, as well as the backlight, interfacing could happen directly + * to the mbed without the need of shields or level shifters as with Arduino. + * + * How to use: + * \code + * // include the library, this will also pull in the header for the provided fonts + * #include "hx8340bs.h" + * + * // create the lcd instance + * HX8340S_LCD lcd( p14, p13, p12, p11 ); // control pins + * + * int main() + * { + * // initialize display - place it in standard portrait mode and set background to black and + * // foreground to white color. + * lcd.Initialize(); + * // set current font to the smallest 8x12 pixels font. + * lcd.SetFont( Font8x12 ); + * // print something on the screen + * lcd.Print( "Hello, World!", CENTER, 25 ); // align text to center horizontally and use starndard colors + * + * while ( 1 ) { } + * } + * + * \endcode + * \version 0.1 + * \author Todor Todorov + */ +class HX8340S_LCD : public LCD +{ +public: + /** Creates a new instance of the class. + * + * \param CS Pin for the ChipSelect signal. + * \param RESET Pin for the RESET line. + * \param SCL Pin for the serial clock signal. + * \param SDI Pin for the serial data signal. + * \param BL Pin for controlling the backlight. By default not used. + */ + HX8340S_LCD( PinName CS, PinName RESET, PinName SCL, PinName SDI, PinName BL = NC ); + + /** Initialize display. + * + * Wakes up the display from sleep, initializes power parameters. + * This function must be called first, befor any painting on the + * display is done, otherwise the positioning of graphical elements + * will not work properly and any paynt operation will not be visible + * or produce garbage. + * + * \param oritentation The display orientation, landscape is default. + */ + virtual void Initialize( orientation_t orientation = LANDSCAPE ); + + /** Puts the display to sleep. + * + * When the display is in sleep mode, its power consumption is + * minimized. Before new pixel data can be written to the display + * memory, the controller needs to be brought out of sleep mode. + * \sa #WakeUp( void ); + * \remarks The result of this operation might not be exactly as + * expected. Putting the display to sleep will cause the + * controller to switch to the standard color of the LCD, + * so depending on whether the display is normally white, + * or normally dark, the screen might or might not go + * dark. Additional power saving can be achieved, if + * the backlight of the used display is not hardwired on + * the PCB and can be controlled via the BL pin. + */ + virtual void Sleep( void ); + + /** Wakes up the display from sleep mode. + * + * This function needs to be called before any other, when the + * display has been put into sleep mode by a previois call to + * #Sleep( void ). + */ + virtual void WakeUp( void ); + +protected: + /** Sends a command to the display. + * + * \param cmd The display command. + * \remarks Commands are controller-specific and this function needs to + * be implemented separately for each available controller. + */ + virtual void WriteCmd( unsigned short cmd ); + + /** Sends pixel data to the display. + * + * \param data The display data. + * \remarks Sendin data is controller-specific and this function needs to + * be implemented separately for each available controller. + */ + virtual void WriteData( unsigned short data ); + + /** Writes a single byte of pixel data to the display. + * + * \param data The data to be written. + * \remarks Sendin data is controller-specific and this function needs to + * be implemented separately for each available controller. + */ + virtual void WriteByteData( unsigned char data ); + + /** Assigns a chunk of the display memory to receive data. + * + * When data is sent to the display after this function completes, the opertion will + * start from the begining of the assigned address (pixel position) and the pointer + * will be automatically incremented so that the next data write operation will continue + * with the next pixel from the memory block. If more data is written than available + * pixels, at the end of the block the pointer will jump back to its beginning and + * commence again, until the next address change command is sent to the display. + * + * \param x1 The X coordinate of the pixel at the beginning of the block. + * \param y1 The Y coordinate of the pixel at the beginning of the block. + * \param x2 The X coordinate of the pixel at the end of the block. + * \param y2 The Y coordinate of the pixel at the end of the block. + * \remarks Addressing commands are controller-specific and this function needs to be + * implemented separately for each available controller. + */ + virtual void SetXY( uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2 ); + +private: + void serializeByte( unsigned char data ); + +private: + DigitalOut _lcd_pin_scl, _lcd_pin_sdi; + DigitalOut* _lcd_pin_bl; +}; + +#endif /* TFTLCD_HX8340B_H */