Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication. Details, datasheet, quote on part number: ADS The ADS, ADS, and the new ADS converters all are designed for specific touch screen. ADSE ti ADS, Touch Screen Controller. FEATURES. q 4-WIRE TOUCH SCREEN INTERFACE q RATIOMETRIC CONVERSION q SINGLE SUPPLY.

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Articles Top Articles Search resources. My last question mainly deals with the calibration.

XPT (ADS) – Touch Screen Decoder IC [] : Sunrom Electronics/Technologies

Thread starter Micro Start date Apr 9, To participate you need to register. Do you use the uC’s builtin ADC to do this? The touch sometimes comes like this So I use the middle and then go to all four corners making four different maps. Once you get those coordinates what exactly do you do with them? Well, I’m stuck with this controller for now, heh. I’m stuck trying to figure out this controller. For example, if I read infor the center when it is supposed to beI have 4 calibrations 5 point calibration If your touch panel doesn’t tilt you can get away with 3 points I’ll try working on it a bit more later today, but your response raised a few questions more questions: You need a map function to work out the TRUE pen position map xLeft, yTop, xcentre,ycentre ; return point 0,0 tomap xcentre,ycentre, xright, yTop ; return pointto ,0 map xLeft, yBottom, xcentre,ycentre ; return point 0, tomap xcentre,ycentre, xright, ybottom ; return pointtoThis will give a good linear reading.

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Forums New posts Search forums. From the example I am working off of, I’m a bit confused as to when I actually get the X and the Y data and how it works. I make my own Ouch, I can see from the above picture how mechanically the touch screen can sometimes not be properly be placed over the LCD screen, thanks for clearing that up as well.

In general what is the process used with the five offsets?

ADS datasheet, Pinout ,application circuits 4-wire Touch Screen Controller

I found some sample drivers in the GLCD and touch screen: If I’m not mistaken, how it works is read the X and Y and using if statements check to see if it falls into a certain range and then use one of the map functions that contains an offset for the corresponding range?

By continuing to use this site, you are consenting to our use of cookies. Thanks for the response Ian I really appreciate it.

Electro Tech aads7843 an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Oh wow, that’s cool.

ADS7843 Datasheet

What I do is write the value’s to the screen dead center so I can see Then touch everywhere and write down the figures. I have never used this touch controller I calibrate the dead center then each quarter in turn Welcome to our site! Also, thank you for clearing up the A2-A0, looking back at the data sheet it makes a bit more sense.

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This makes it a little more linear. You must log in or register to reply here. Hey guys, I could use a bit of help. Click here to register now.

ADS7843 Touch Screen Controller Assistance

Sorry for the multitude of questions, datashet once you have the offsets for the middle and corners do you average the collected offsets? For a better experience, please enable JavaScript in your browser before proceeding.

Do I just add or subtract in this case the amount it is off by, and for areas close to the center use that offset and for the corners use their respective offsets? It can sometimes be a little crooked as well Or do I average the offsets of the center and corners and use that as the “overall” offset? I then check to see which map function I should use and if falls within a certain range I use the center offset that I have stored subtracts 40 and 30?