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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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ADS7843 Touch Screen Controller

Hey guys, I could use a bit of help. Even when it IS placed properly, this can happen.

I make my own Calibration is a bit odd. For example, if I read infor the center when it is supposed to beMicro New Member Apr 10, Or do I average the offsets of the center and corners and use that as eatasheet “overall” offset?

The first thing you should be doing is displaying the raw data Readx and Ready Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at I’ll try working on it a bit more later today, but your response raised a few questions more ads78843 I believe it is here: It can sometimes be a datashheet crooked as well Click here to register now.

I found that the touch panel tilts slightly so linear calibration isn’t the best way to go.


4-wire Touch Screen Controller

Media New media New comments Search media. Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Micro New Member Apr 9, The touch sometimes comes like this So I use the middle and then go to all four corners making four different maps.

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? I have never used this touch controller My last question mainly deals with the calibration.

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.

Thread starter Micro Start date Apr 9, I’ll also be sure and wait ms before reading the values. Well, I’m stuck with this controller for now, heh. I have tried to break it apart a bit and understand it: Forums New posts Search forums. Oh wow, that’s cool. Thanks for the response Ian I really appreciate it.

To participate you need to register. Potentiometer Questions Started by norbss Yesterday at 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.

I calibrate the dead center then each quarter in turn But to make the most of it I calibrate 4 parts instead of one Articles Top Articles Search resources. Datasheets, Manuals or Parts. Replacement Transformer Started by ncag Today at 7: Once you get those coordinates what exactly do you do with them? I’m stuck trying to figure out this controller. For a better experience, please enable JavaScript in your browser before proceeding.


This give the best results 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.

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

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? Also, thank you for clearing up the A2-A0, looking back at the data sheet it makes a bit more sense. Do you use the uC’s builtin ADC to do this? This makes it a little more linear. Sorry for the multitude of questions, but once you have the offsets for the middle and corners do you average the collected offsets?

By continuing to use this site, you are consenting to our use of cookies. I found some sample drivers in the GLCD and touch screen: You need a dstasheet function to work out the TRUE pen position map xLeft, yTop, xcentre,ycentre ; return point 0,0 tomap xcentre,ycentre, asd7843, 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.

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