Frank Vannieuwkerke / SPI_TFT_ILI9320

SPI Library for 240x320 TFT LCD with ILI9320, ILI9325 and ILI9328 chip

Dependencies:   BurstSPI

Dependents:   KL25Z_ILI9320_Demo Mini-DK

Other LCD drivers

05-30-2014
Device initialization for ILI9325 and ILI9328 has been added to the library.
The library will auto-detect what driver chip is connected (ILI9320, ILI9325 or ILI9328) and use the appropriate init sequence.
Please use the Issues tab to report any problems.

SPI TFT library for LPC1768, LPC11U24 and KL25Z

Loading fonts

When using this libary, don't forget to load the TFT_FONTS library from Peter Drescher at http://mbed.org/users/dreschpe/code/TFT_fonts/

KL25Z : limitations

The filetoflash function (see below) is not available.
Writing to the LCD is a little slower as the KL25Z only supports 8-bit SPI communication.

LPC1768 and LPC11U24 : filetoflash (SD to CPU flash)

This library contains a function to copy an image from the SD card to the CPU flash memory.
It allows you to use an image as background without speed loss when writing other text and graphics.
By default, this option is enabled.
It can be disabled by adding following instruction BEFORE you load the library: 

#define NO_FLASH_BUFFER

Since the flash memory has limited write endurance, DO NOT use this feature when you intend to read multiple images from the SD card (eg: when used as a photo frame).

Sample code

#include "mbed.h"

// SPI TFT demo
// NOTES
// - Connect the LCD reset pin to the reset pin of the CPU board or connect a
//   separate reset circuit to the LCD reset pin (pull-up 10k to 3v3 + 100nf capacitor to GND).
// - When using the mbed LPC1768 board, following hardware modifications are needed:
//       Connect the LCD reset pin to the nR input.
//       Connect a 100nF capacitor between the nR input and GND.
//       Connect a pushbutton parallel to the 100nF capacitor.
//   Use the new pushbutton as the reset button (instead of the LPC1768 on-board reset button).
#define NO_FLASH_BUFFER         // Do not use CPU flash for storing bitmaps
#include "SPI_TFT_ILI9320.h"
#include "Arial12x12.h"
#include "Arial24x23.h"
#include "Arial28x28.h"
#include "font_big.h"
SPI_TFT TFT(p11, p12, p13, p14,"TFT");  //mosi, miso, clk, cs

int main (void)
{

    TFT.claim(stdout);        // send stdout to the TFT display
    // Disable stdout buffering, allows us to omit \n with printf.
    // More info at http://www.cplusplus.com/reference/cstdio/setvbuf/
    setvbuf ( stdout , NULL , _IONBF , NULL );
    TFT.background(Black);    // set background to black
    TFT.foreground(White);    // set chars to white
    TFT.cls();                // clear the screen
    TFT.set_font((unsigned char*) Arial12x12);  // select the font

    TFT.locate(0,0);
    printf("ILI9320 SPI TFT library\n");
    printf("Simple demo\n");
}



Demo code LPC1768 (Mini-DK board)

Import programLPC1768_Mini-DK

LPC1768 Mini-DK board with 2.8" SPI TFT and SPI touch

Last commit 04 Nov 2014 by Frank Vannieuwkerke


Demo code FRDM-KL25Z board

Import programKL25Z_ILI9320_Demo

KL25Z driving an ILI9320 LCD board with touch panel (HY28A-LCDB SPI)

Last commit 04 Nov 2014 by Frank Vannieuwkerke

TextDisplay.h

Committer:
frankvnk
Date:
2014-05-30
Revision:
4:2519f2e680af
Parent:
0:630b4da97968

File content as of revision 4:2519f2e680af:

/* mbed TextDisplay Library Base Class
 * Copyright (c) 2007-2009 sford
 * Released under the MIT License: http://mbed.org/license/mit
 *
 * A common base class for Text displays
 * To port a new display, derive from this class and implement
 * the constructor (setup the display), character (put a character
 * at a location), rows and columns (number of rows/cols) functions.
 * Everything else (locate, printf, putc, cls) will come for free
 *
 * The model is the display will wrap at the right and bottom, so you can
 * keep writing and will always get valid characters. The location is 
 * maintained internally to the class to make this easy
 */

#ifndef MBED_TEXTDISPLAY_H
#define MBED_TEXTDISPLAY_H

#include "mbed.h"

class TextDisplay : public Stream {
public:

  // functions needing implementation in derived implementation class
  /** Create a TextDisplay interface
     *
     * @param name The name used in the path to access the strean through the filesystem
     */
    TextDisplay(const char *name = NULL);

    /** output a character at the given position
     *
     * @param column column where charater must be written
     * @param  row where character must be written
     * @param c the character to be written to the TextDisplay
     */
    virtual void character(int column, int row, int c) = 0;

    /** return number if rows on TextDisplay
     * @result number of rows
     */
    virtual int rows() = 0;

    /** return number if columns on TextDisplay
    * @result number of rows
    */
    virtual int columns() = 0;
    
    // functions that come for free, but can be overwritten

    /** redirect output from a stream (stoud, sterr) to  display
    * @param stream stream that shall be redirected to the TextDisplay
    */
    virtual bool claim (FILE *stream);

    /** clear screen
    */
    virtual void cls();
    virtual void locate(int column, int row);
    virtual void foreground(uint16_t colour);
    virtual void background(uint16_t colour);
    // putc (from Stream)
    // printf (from Stream)
    
protected:

    virtual int _putc(int value);
    virtual int _getc();

    // character location
    uint16_t _column;
    uint16_t _row;

    // colours
    uint16_t _foreground;
    uint16_t _background;
    char *_path;
};

#endif