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On ebay i found this very nice and cheap tft display .It contains a tft color screen with 320×240 pixels, touch-controller and Sd card reader.
The display controller used is the SSD2119 and for the touch controller they used ADS7843.
Demo is running on Atmel Avr M1284P @16Mhz with Bascom 1.12.0.0

3.5" 320×240 Color TFT Demo with touchscreen, Bascom and SSD2119 controller

Some Notes:
– 320x240x16bits needs enormous amount of data and cpu power to get something on the screen, don’t expect live video @25fps. Take a look at the video to get an idea of the performance.
– To get the display compatible with the Bascom 8bit BGC (Bascom Grapichs Color) files, the 8bits color are up-scaled to 16bits. Therefore the colors are maybe not always correct, you can adjust this in the look-up table.
– The size of the BGC are limited to 255×255 pixels.
– The 24bit colors of the BMP files are downscaled to 16bits by simply dropping the LSB.
– Jumpers setting of the display board  are a bit strange, make the soldering connection is a logic 0 and removing the solder is a logic 1.
– The touch controller needs Polarity =low and Phase =0 for the spi communication, the Sd cards needs Polarity =high and Phase =1. To overcome this problem in the readtouch function’s the Polarity and Phase are changed at the beginning of the function and changed back at the end.
– Display works on 3.3V so use a level converter or an AVR that can run on 3.3V.
– Add the Spiin = 255 option to the Config Spi line in Config_mmc.bas if your using the touch and sd-reader, else it won’t work.

891 Downloads

 

Syntax

Lcdtext string, x , y , fontset , forecolor , backcolor

Remarks

String String to be displayed
x  Constant or variable with x position.
y  Constant or variable with y position.
fontset  Fontset to be used to display the text
Forecolor  RRRRRGGGGGGBBBBB
Backcolor  RRRRRGGGGGGBBBBB

 

 

 

 

 

 

 

This will show text on the lcd. It uses the Bascom FONT files for compatibility.
To add or remove fontsets modify these lines in the subroutine;

If Fontset = 1 Then Restore Font8x8
If Fontset = 2 Then Restore Font16x16
If Fontset = 3 Then Restore Font6x8
If Fontset = 4 Then Restore Font5x5

Sorry, but there was no better solution.
These are the name’s that you gave to the font, NOT the file-name if you don’t know the font name, open the font file in the font editor, and there it is, right on top.
Don’t forget to $Include your font files at the end of the program.

 

Syntax

Lcd_showpicture_bmp Filename, x , y

Remarks

 Filename  Filename of Windows BMP file (24bpp)
 x  Constant or variable with x position.
 y  Constant or variable with y position.

 

 

 

 

This will show Windows 24bpp BMP from the sd card. The 24bpp colors are downscaled to 16bpp.
Requires Avr-dos.

 

Syntax

Lcd_showpicture_sd Filename, x , y

Remarks

 Filename  Filename of Bascom BGC file
 x  Constant or variable with x position.
 y  Constant or variable with y position.

 

 

 

 

This will show Bascom BGC (Bascom Graphics Color) file from the sd-card. The 8bpp colors are up-scaled to 16bpp with the help of a look-up table. In this table you can adjust the colors if necessary.
Requires Avr-dos.

 

Syntax

Lcd_showpicture  x , y

Remarks

 x  Constant or variable with x position.
 y  Constant or variable with y position.

 

 

 

This will show Bascom BGC (Bascom Graphics Color) file from the flash memory. The 8bpp colors are up-scaled to 16bpp with the help of a look-up table. In this table you can adjust the colors if necessary.
Important that you first Restore the picture, for example;
Restore Girl                                                ‘FIRST restore you image before you can show it
Lcd_showpicture_sd “girl.bgc”, 150 , 10

 

Syntax

Lcd_line  x1, y1 , x2 , y2 , color

Remarks

 x1  Starting horizontal location of the line.
 y1  Starting vertical location of the line.
 x2  Horizontal end location of the line.
 y2  Vertical end location of the line.
 color  RRRRRGGGGGGBBBBB

 

 

 

 

 

 

Draws a line on the lcd.

 

Syntax

Lcd_clear  backcolor

Remarks

 backcolor  RRRRRGGGGGGBBBBB

 

 

Clears the lcd in an specified color.

 

Syntax

Lcd_pset  x, y , color

Remarks

 x  The x location.
 y  The y location.
 color  RRRRRGGGGGGBBBBB

 

 

 

 

Set a pixel on the lcd.

 

Syntax

Lcd_Setcursor  x, y

Remarks

 x  The x location.
 y  The y location.

 

 

 

Set the ram address (cursor) to the specified position.

 

Syntax

Write_data  data16

Remarks

 Data16  Word

 

 

Write 16bit data to the lcd

 

Syntax

Write_Command  Command

Remarks

 Command  Word

 

 

Write 16bit command to the lcd

 

Syntax

Lcd_reset

Hardware lcd reset

 

Syntax

Lcd_init

Init the lcd

 

Syntax

Lcd_home

Set the ram address (cursor) to the home position

 

Syntax

A= Rgb16  rgb8

Remarks

 A  16bpp RGB Word
 rgb8  8bpp RGB

 

 

 

Convert 8bpp color to 16bpp color.

 

 

Syntax

A= Readtouch_X

Remarks

 A  12 Bit x position
 rgb8  8bpp RGB

 

 

 

Reads the X coordinates from the touchscreen.

 

 

Syntax

A= Readtouch_Y

Remarks

 A  12 Bit y position
 rgb8  8bpp RGB

 

 

 

Reads the Y coordinates from the touchscreen.