Touch Screen Shield for Arduino UNO misc. Id like to start compiling information about the screens people are using. Please visit this page before you go, where I also have a sketch that attempts to read the LCDs driver code without any additional libraries. My First Shield. I was looking for some type of touch screen for the Arduino when I ran across this little gem on e. Sketch Up 2014 Serial Number' title='Sketch Up 2014 Serial Number' />USB serial adapter Two or more Wireless RS232 modules e. EWRF 3022 Arduino. Its a Nano in the picture but any model should due. A gadget box. Bay. I was hoping to avoid a shield, but for only 8. China, I decided to give it a shot. It ended up taking me longer than the advertised 1. Ive played with it, the more I think Im starting to like it. Sketch Up 2014 Serial Number' title='Sketch Up 2014 Serial Number' />Features 2. LCD TFT display Bright, 4 white LED backlight, on by default but you can connect the transistor to a digital pin for backlight control Colorful, 1. RAM buffer 8 bit digital interface, plus 4 control lines Uses digital pins 5 1. That means you can use digital pins 2, 3 and analog 4 and 5. Sketch Up 2014 Serial Number' title='Sketch Up 2014 Serial Number' />Learn how to control DC and stepper motors with Arduino and L298N Hbridge modules. Pin 1. 2 is available if not using the micro SD 5. V compatible, use with 3. V or 5. V logic Onboard 3. V 3. 00m. A LDO regulator. Specifications Size 7. Weight about 3. 1g. Libraries Included Kind ofThe shield came packed with one of those tiny CD ROM discs with a few different RAR files on it. The one with arduino UNO in the name seemed like the most likely candidate, so I opened it up and started poking around. After some trial and error, including finding the correct library, changing library names, altering include file references, etc., I managed to get something on the screen. Car Driving Games Free Roam on this page. I made many small tweaks to the LCD library to make my life a little easier see below, but the many references to Adafruit in the code led me to give their web site a look. There I found a library for a 2. Im not sure the code in their libraries will work without modification, but they may be worth taking a look at. Picture Quality. I didnt have very high expectations in terms of picture quality, so I wasnt disappointed. Overall, I would rate  it as good enough for the average hobby project. While you wont be floored by the rich colors, in the context of price and features, its more than sufficient. Compare the original image below to the 1. While the picture of the LCD screen doesnt really do it justice, it should give you an idea of what youll see. The first thing that will likely draw your attention about the screen image is the very noticeable banding. This becomes less apparent with line drawings using a simpler color palette, but it is very visible when viewing bitmaps or filling the screen with a solid color. SD Card Slot. The shield comes equipped with a micro SD card slot, which I really had no real intention of using when I bought it. My curiosity quickly took over, however, and I tried to run some of the sample code. Unfortunately, I didnt meet with any success during my initial attempts to get it working and threw in the towel completely after pushing a bit too hard on the card as I inserted it, breaking the connector off the board. Free Download Kodak Filter For Adobe Photoshop'>Free Download Kodak Filter For Adobe Photoshop. The next day, I decided to give it another go, so I got out my soldering iron and did my best to reattach the connector, despite the miniature nature of the surface mount pins. I made sure to get plenty of solder on the four legs to keep it firmly attached to the board, then did a less than stellar job of getting a bit of solder on the tiny pins. I took a quick glance with a magnifying glass, and it didnt appear that I had left any shorted pins, so I tried the sample code again. Much to my surprise, it worked, and before long I was looking at my own bitmap images on my Arduino screen. Using the Shield. General. Im still not sure exactly what driver chip my LCD is using. The libraries included with the unit expand into a directory called arduino 9. I originally took this to mean that it used the ILI9. I found here to expand functionality as needed. However, some of the sample code does a driver check before proceeding, as follows. TFT display. uint. Register0x. 0. if identifier 0x. Serial. printlnFound ILI9. Serial. printlnFound ILI9. Serial. printUnknown driver chip. Serial. printlnidentifier, HEX. According to the ILI9. On my board, I get a reading of 0x. C5. 05.   I havent run into anything that hasnt worked thus far, so I havent done any further research. Disabling the check is good enough for what Im doing at this point. I have made some modifications to the library included with the board, and Ill include my files below. It wasnt until after Id started monkeying with things and noticing references to Adafruit in the code, that I realized there may be better options already out there. Whether or not they work with this screen is something I have yet to determine. Adafruit libraries here  http learn. Displaying Graphics. The TFT library includes functions for drawing lines, rectangles, rounded rectangles, circles and triangles, all of which can be filled or outlined. There is example code that cycles through various screen patterns using each. After I got the SD card reader working, I spent some time concentrating on loading bitmaps. The sample code that comes with the library has a few examples that load 2. SD card and display them on the screen in various rotations. These samples didnt work correctly until I modified the code to use the set. Pixel method, which resulted in a very slow display time but worked in all screen rotations. The write. Data method that was originally being invoked simply writes to the displays graphics memory, which is a good thing for speed. However, this method was not taking screen rotation into account. Studying the data sheet, I found that GRAM Access Direction can be altered such that after a write. Data call, the next write address will be properly calculated based on the current rotation. With that information, I modified the set. Rotation method to also change the GRAM access direction. This new set. Rotation method fixed the bitmap sample code to some extent and sped things up considerably. Unfortunately, it was still taking 2. It was time to get serious. The firs thing I did was switch away from the 2. The display uses a 1. RGB format R5. G6. B5, so it makes more sense to do that transformation somewhere other than the Arduino if youre just worried about getting it onto the screen as quickly as possible. Furthermore,  the standard Windows bitmap file is stored in a bottom up format, which adds a little complexity to the direct write method. So, I wrote a little utility to convert my bitmap files to a 1. LCDs GRAM.   You can find that utility here. Moving to the 1. 6 bit format had a huge impact on performance, though I didnt think to take any timings in this state, as I wasnt quite done. My next step was to simplify loading by getting rid of the position calculations required for bitmaps that didnt extend the entire width of the screen. The data sheet provides details about creating a window within the screen, which you can specify the dimensions of. Download Free Map For Tomtom One. Combining this window setting with the GRAM access direction settings mentioned above, it is possible to just send the pixel information in bulk and allow the LCD driver chip handle the wrapping. The end result is fast, loading and displaying a 3. Ive since been experimenting with the sdfatlib library for SD card access, and the results have improved even further, bringing loaddisplay time to 1. I was looking more for a smaller footprint, but Ill take the the speed as well. Arduino Code. void display. Bitmapint x, int y.