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

Dependencies:   Mini-DK mbed SDFileSystem

WARNING: filetoflash (SD to CPU flash)

The SPI_TFT library called from Mini-DK.lib contains an option to copy an image from the SD card to the CPU flash memory. This 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 uncommenting the #define mentioned below in Mini_DK.h:

#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).

main.cpp

Committer:
frankvnk
Date:
2013-01-04
Revision:
9:3e117b89c705
Child:
10:d07f76421408

File content as of revision 9:3e117b89c705:

#include "stdio.h"
#include "mbed.h"
#include "Mini_DK.h"
//#include "string"

extern unsigned char p1[];  // the mbed logo
#define RGB565CONVERT(red, green, blue) (uint16_t)( (( red   >> 3 ) << 11 ) | (( green >> 2 ) << 5  ) | ( blue  >> 3 ))

DigitalOut led(DK_LED1);
// TFT -> mosi, miso, sclk, cs
SPI_TFT TFT(LCD_SDI, LCD_SDO, LCD_SCK, LCD_CS,"TFT");
// ADS7843 -> mosi, miso, sclk, cs, irq, SPI_TFT
TouchScreenADS7843 TP(TP_SDI ,TP_SDO ,TP_SCK ,TP_CS ,TP_IRQ, &TFT);

int main()
{
    unsigned short LCD_id;
    TFT.claim(stdout);        // send stdout to the TFT display

    TFT.background(Black);    // set background to black
    TFT.foreground(White);    // set chars to white


    // LCD demo
    // first show the 4 directions
    TFT.cls();
    TFT.set_font((unsigned char*) Arial12x12);
    TFT.set_orientation(0);
    TFT.locate(0,0);
    TFT.printf("  Hello Mbed 0");
    TFT.set_orientation(1);
    TFT.locate(0,0);
    TFT.printf("  Hello Mbed 1");
    TFT.set_orientation(2);
    TFT.locate(0,0);
    TFT.printf("  Hello Mbed 2");
    TFT.set_orientation(3);
    TFT.locate(0,0);
    TFT.printf("  Hello Mbed 3");
    TFT.set_orientation(1);
    TFT.set_font((unsigned char*) Arial24x23);
    TFT.locate(50,100);
    TFT.printf("TFT orientation");

    wait(2);

    // draw some graphics
    TFT.cls();
    TFT.set_orientation(1);
    TFT.set_font((unsigned char*) Arial24x23);
    TFT.locate(120,115);
    TFT.printf("Graphic");
    TFT.line(0,0,100,200,Green);
    TFT.rect(100,50,50,50,Red);
    TFT.fillrect(180,25,40,45,Blue);
    TFT.draw_ellipse(80, 150, 33, 33, White);
    TFT.fill_ellipse(80, 50, 33, 33, White);
    wait(2);
    TFT.cls();
    TFT.draw_ellipse(160, 120, 100, 50, Yellow);
    TFT.draw_ellipse(160, 120, 100, 100, Blue);
    TFT.fill_ellipse(160, 120, 80, 40, Green);
    wait(2);

    // bigger text
    TFT.foreground(White);
    TFT.background(Blue);
    TFT.cls();
    TFT.set_font((unsigned char*) Arial24x23);
    TFT.locate(0,0);
    TFT.printf("Different Fonts :");

    TFT.set_font((unsigned char*) Neu42x35);
    TFT.locate(0,50);
    TFT.printf("Hello");
    TFT.set_font((unsigned char*) Arial24x23);
    TFT.locate(50,100);
    TFT.printf("Hello");
    TFT.set_font((unsigned char*) Arial12x12);
    TFT.locate(55,150);
    TFT.printf("Hello");

    TFT.set_orientation(2);
    TFT.set_font((unsigned char*) Arial24x23);
    TFT.locate(10,10);
    TFT.printf("Hi mbed");
    wait(2);

    // mbed logo
    TFT.set_orientation(1);
    TFT.background(Black);
    TFT.cls();
    TFT.Bitmap(90,90,172,55,p1);

    // Read LCD ID
    TFT.set_orientation(0);
    LCD_id = TFT.Read_ID();
    TFT.locate(10,10);
    TFT.printf("LCD: ILI%04X", LCD_id);
    wait(2);

    // RGB color wheel demo (cycle through all colors)
    TFT.cls();
    TFT.foreground(Yellow);    // set chars to yellow
    TFT.set_font((unsigned char*) Arial12x12);
    TFT.locate(10,10);
    TFT.printf("RGB color wheel (2x)");

    uint8_t r = 255, g = 0,  b = 0, step = 1, i;
    for (i=0;i<2;i++)
    {
        for(;g<255;g+=step) {TFT.fillrect(70,110,100,100,RGB565CONVERT(r, g, b));}      // Cycle from FF0000 to FFFF00 : red to yellow
        for(;r>0;r-=step)   {TFT.fillrect(70,110,100,100,RGB565CONVERT(r, g, b));}      // Cycle from FFFF00 to 00FF00 : yellow to green
        for(;b<255;b+=step) {TFT.fillrect(70,110,100,100,RGB565CONVERT(r, g, b));}      // Cycle from 00FF00 to 00FFFF : green to cyan
        for(;g>0;g-=step)   {TFT.fillrect(70,110,100,100,RGB565CONVERT(r, g, b));}      // Cycle from 00FFFF to 0000FF : cyan to blue
        for(;r<255;r+=step) {TFT.fillrect(70,110,100,100,RGB565CONVERT(r, g, b));}      // Cycle from 0000FF to FF00FF : blue to purple
        for(;b>0;b-=step)   {TFT.fillrect(70,110,100,100,RGB565CONVERT(r, g, b));}      // Cycle from FF00FF to FF0000 : purple to red
    }
    wait(2);


    // Touchpanel demo
    TP.TouchPanel_Calibrate();
    TFT.set_font((unsigned char*) Arial12x12);
    TFT.set_orientation(0);
    TFT.locate(0,0);
    TFT.printf(" X:");
    TFT.locate(70,0);
    TFT.printf(" Y:");
    while (1)
    {
        if (!TP._tp_irq)
        {
            if (TP.Read_Ads7846())
            {
                TP.getDisplayPoint() ;
                TP.TP_DrawPoint(TP.display.x,TP.display.y, Blue);
                TFT.locate(25,0);
                TFT.printf("%03d",TP.display.x);
                TFT.locate(95,0);
                TFT.printf("%03d",TP.display.y);
                // Touchscreen area is larger than LCD area.
                // We use the bottom area outside the LCD area to clear the screen (y value > 320).
                if (TP.display.y > 320)
                {
                    TFT.cls();
                    TFT.locate(0,0);
                    TFT.printf(" X:");
                    TFT.locate(70,0);
                    TFT.printf(" Y:");
                }
            }
        }
    }
}