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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Sorry for the multitude of questions, but once you dayasheet the offsets for the middle and corners do you average the collected offsets? Welcome to our site!

Micro New Member Apr 9, I calibrate the dead center then each quarter in turn I make my own 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.

ADS7843 Touch Screen Controller

Media New media New comments Search media. I found some sample drivers in the GLCD and touch screen: Or do I average the offsets of the center and corners and use that as the “overall” offset? Hey guys, I could use a as7843 of help.

Thread starter Micro Start date Apr 9, Forums New posts Search forums. If I’m not mistaken, how it works is read the X and Y and using if statements datasheef 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?

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I have 4 calibrations 5 point calibration If your touch panel doesn’t tilt you can get away with 3 points 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.

4-wire Touch Screen Controller

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It can sometimes be a little crooked as well But to make the most of it I calibrate 4 parts instead of one Click here to register now.

Also, thank you for clearing up the A2-A0, looking back at the data sheet it makes ddatasheet bit more sense. Oh wow, that’s cool. The touch sometimes comes like this So I use the middle and then go to all four corners making four different maps. I found that the touch panel tilts slightly so linear calibration isn’t the best way to go.

One other thing when you press the touch wait mS before you read x and y, the ads may do this for you, as the reading settles and changes position. My last question mainly deals with the calibration. I believe it is here: Do I just add or subtract in this case the amount it is datashet by, and for areas close to the center use that offset and for the corners use their respective offsets?

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

I’ll try working on it a bit more later today, but your response raised a few questions more questions: In general what is the process used with the five offsets? Well, I’m stuck with this controller for now, heh. To participate you need to register. Dtaasheet have never used this touch controller Calibration is a bit odd.

ADS Datasheet(PDF) – Burr-Brown (TI)

For example, if I read infor the center when it is supposed to beMicro New Member Apr 10, You must log in or register to reply here. 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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I then check to see which map function I should use and if falls within a certain range I use the center datasehet that I have stored subtracts 40 and 30? This give the best results Do you use the uC’s builtin ADC to do this?