Search found 9 matches

by DaveC
Thu Aug 28, 2014 6:33 am
Forum: GTT Series
Topic: Reading and Writing to / from GTT50A
Replies: 7
Views: 7157

Re: Reading and Writing to / from GTT50A

Oh well, I've obviously jumped the gun here! Using a one byte read method I'm still getting the wrong information come through even when reading. So I'm back to square one unfortunately. I can filter out the incorrect data using a similar parsing technique as you describe but then after a few second...
by DaveC
Thu Aug 28, 2014 3:22 am
Forum: GTT Series
Topic: Reading and Writing to / from GTT50A
Replies: 7
Views: 7157

Re: Reading and Writing to / from GTT50A

Hiya, Indeed it seems the solution is to read one byte at a time like you described as opposed to reading a number of bytes as to how the manual would seem to suggest. As to what's causing the problem with multiple byte reads - I don't know - it may a buffering issue within the windows system or the...
by DaveC
Wed Aug 27, 2014 4:23 pm
Forum: GTT Series
Topic: Reading and Writing to / from GTT50A
Replies: 7
Views: 7157

Re: Reading and Writing to / from GTT50A

Hiya Troy, Thankyou for replying. I understand why you mention a possible problem with threading, as threading can be notorious for bug hunting. However I'm quite well versed to threading. The main application is heavily multi-threaded. I understand lock and wait events have to be used to ensure syn...
by DaveC
Wed Aug 27, 2014 10:01 am
Forum: GTT Series
Topic: Reading and Writing to / from GTT50A
Replies: 7
Views: 7157

Re: Reading and Writing to / from GTT50A

Hi Troy, I understand - the device is set to 115200 and so should the com port be too. I'm new to serial communication which is why I'm sure I have something set up incorrect. If I don't use the reading thread then the screen works as expected. My plan is to use the second thread to 'filter' for tou...
by DaveC
Wed Aug 27, 2014 7:38 am
Forum: GTT Series
Topic: Reading and Writing to / from GTT50A
Replies: 7
Views: 7157

Reading and Writing to / from GTT50A

Hiya all. Using Win7 x64, c++. I wonder if anyone could help with setting up the usb serial port settings to communicate correctly with the screen. I'm using 2 threads, 1 solely for writing and 1 solely for reading, but I'm getting random data being returned using similar settings that I find in the...
by DaveC
Wed Aug 27, 2014 5:54 am
Forum: GTT Series
Topic: GTT70A GTT50A calibration error
Replies: 6
Views: 6876

Re: GTT70A GTT50A calibration error

Hiya Clark, Thankyou for your input. I've managed to get it calibrated now using a combination of things, unfortunately I'm not sure which of them resolved this issue, but never the less, I got a 'Calibrated' message so all is good. I have other issues of which I'll start another thread. Many thanks...
by DaveC
Fri Aug 22, 2014 1:55 pm
Forum: GTT Series
Topic: GTT70A GTT50A calibration error
Replies: 6
Views: 6876

Re: GTT70A GTT50A calibration error

Hiya Raquel, Yes, I was using the support tool to send the calibration command. Several other people have also tried to calibrate the screens with the same result. All of the cables are in good condition with good, solid connections. You mention to touch only in the centre of the box(es), we tried o...
by DaveC
Fri Aug 22, 2014 2:16 am
Forum: GTT Series
Topic: GTT70A GTT50A calibration error
Replies: 6
Views: 6876

Re: GTT70A GTT50A calibration error

Thankyou for replying. These are the first two displays that I've used. The several different serials in various places on both boards, none of which I'd describe as black text on a clear sticker, so I'll just list them in all in most likeliness... GTT50A: 14M07-5601 AFY800480A0-5.0N6NTN T1181C1304 ...
by DaveC
Thu Aug 21, 2014 11:03 am
Forum: GTT Series
Topic: GTT70A GTT50A calibration error
Replies: 6
Views: 6876

GTT70A GTT50A calibration error

Hiya, I'm using the GTT70A screen and I can send the calibrate touch screen command, the screen goes into the calibration phase asking me to touch the screen in various places, first bottom left, then top middle, then bottom right, then top right. As I press into the top right I get a message of 'Ca...