16
Discussion - EVE / Re: Capacitive touch screen calibration
« on: June 16, 2020, 04:15:53 PM »
Many thanks for this 
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17
Discussion - EVE / Re: Capacitive touch screen calibration
« on: June 15, 2020, 09:54:21 AM »
Hi,
Thanks for those answers.
We are currently testing the 4.3" screen, with a resolution of 480x272. We will probably migrate to a 7" screen for a resolution of 800x480.
@Rudolph
Thanks for the custom calibration function. This may be helpful if the calibration points of the CMD_CALIBRATE function cannot be known.
Best regards
Thanks for those answers.
Quote
If you let me know what screen resolution you are using I can query the dev team for information on where the points would be located on the screen.
We are currently testing the 4.3" screen, with a resolution of 480x272. We will probably migrate to a 7" screen for a resolution of 800x480.
@Rudolph
Thanks for the custom calibration function. This may be helpful if the calibration points of the CMD_CALIBRATE function cannot be known.
Best regards
18
Discussion - EVE / Re: Capacitive touch screen calibration
« on: June 12, 2020, 07:44:16 AM »
Thanks for those info.
That what's we did (reusing the transformation matrix from one calibration), but this solution has some side effects. If the touches at the calibration are not accurate (and they always are in real life), it leads to area on the edges of the screen where one of the provided coordinates becomes 65535 (observed several times). So I figure out that this would also happen if the transformation matrix is arbitrary chosen from one calibration. This means that, in a mass production, some of the screens would be wrongly calibrated. This is not acceptable.
The real solution would be a transformation matrix that is the result of many calibrations. For this, the coordinates of the points that are drawn on the calibration screen should be known. Is it possible to get such info ?
Regards.
That what's we did (reusing the transformation matrix from one calibration), but this solution has some side effects. If the touches at the calibration are not accurate (and they always are in real life), it leads to area on the edges of the screen where one of the provided coordinates becomes 65535 (observed several times). So I figure out that this would also happen if the transformation matrix is arbitrary chosen from one calibration. This means that, in a mass production, some of the screens would be wrongly calibrated. This is not acceptable.
The real solution would be a transformation matrix that is the result of many calibrations. For this, the coordinates of the points that are drawn on the calibration screen should be known. Is it possible to get such info ?
Regards.
19
Discussion - EVE / Capacitive touch screen calibration
« on: June 10, 2020, 04:22:24 PM »
Hi,
Am I wrong if I say that the Capacitive Touch Engine does not need a calibration in extended mode ?
Currently, we only own and tested resistive touch screens. The calibration process appears as a big constraint for a "mass" production.
Thanks in advance for any answer.
Regards.
Am I wrong if I say that the Capacitive Touch Engine does not need a calibration in extended mode ?
Currently, we only own and tested resistive touch screens. The calibration process appears as a big constraint for a "mass" production.
Thanks in advance for any answer.
Regards.
20
Discussion - EVE / Re: How to inflate large image
« on: June 09, 2020, 07:31:44 AM »
Great! I under-estimated the "Inflate" command !
I will code that.
Many thanks for your answers.
I will code that.
Many thanks for your answers.
21
Discussion - EVE / How to inflate large image
« on: June 05, 2020, 04:41:38 PM »
Hi,
I would like to inflate a compressed image (ARGB1555) larger than the circular buffer. Is there a way to do that ?
Thanks in advance for any support.
Regards.
Thierry Pierret
I would like to inflate a compressed image (ARGB1555) larger than the circular buffer. Is there a way to do that ?
Thanks in advance for any support.
Regards.
Thierry Pierret
22
New Member Introductions / New to EVE2 controller
« on: June 05, 2020, 04:25:32 PM »
Hi,
I just connected to the forum, so here is a small introduction.
I'm currently evaluating the EVE2 controller abilities for future new products of my company. The test platform is made of a STM32 MCU development boards and some NewHaven boards.
The race is still opened, but the EVE2-based screen sounds to be a winning choice.
Regards.
I just connected to the forum, so here is a small introduction.
I'm currently evaluating the EVE2 controller abilities for future new products of my company. The test platform is made of a STM32 MCU development boards and some NewHaven boards.
The race is still opened, but the EVE2-based screen sounds to be a winning choice.
Regards.
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