Problem with LCD touch example

Former Member over 11 years ago

Hi,

I tried couple of examples with STM32FDiscovery expansion Board and made USART and LCD 35T w/o touch example work.

But, LCD touch example kept giving me "calibration fail" message when I tried to calibrate the touch screen.

I'm using Keil uVision4 and used the project file in STM32Fxx_LCD_Example_Project/LCD_Touch/MDK-ARM

I set STM32F407VG as my target devcice and ST-Link Debugger as my debugger.

It compied and load without errors. LCD screen showed total five calibration points.

So, I touched each point with touch pen. But, "Calibration fail message" came out and it did calibration again.

Pleas help if anyone knows about this problem.

Thanks

Top Replies

gadget.iom over 11 years ago +1

Have you managed to get past this calibration issue yet? I found that the calibration points had to be accurately touched, and a delay before the next crosshair appearing caused me to double-tap some points…

0 gadget.iom over 11 years ago

Have you managed to get past this calibration issue yet?
I found that the calibration points had to be accurately touched, and a delay before the next crosshair appearing caused me to double-tap some points causing failure. Had to tap and consciously wait.

The support for these kits is severely lacking as you have no doubt discovered after googling.
Cancel
Vote Up +1 Vote Down

Sign in to reply

Verify Answer

Cancel
0 Former Member over 10 years ago

Hello, from where did you download this software examples?
I bought the baseboard and the lcd module, but I dont find the software examples for this last one.
For the baseboard I found examples for ethernet and usb only.

Thank you.
Regards,
Fernando
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel
0 gadget.iom over 10 years ago in reply to Former Member

I would avoid the ST examples altogether, they are absolute junk! We have scrapped all of the manufacturers firmware libraries and resorted to writing them ourselves from scratch.

You will end up with more stable and less bloated code through this approach, and learn more in the process.

I have taken some time to look for the LCD examples but cannot seem to find them online again.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel
0 gadget.iom over 10 years ago in reply to gadget.iom

Just found a download for the baseboard on this site. There are some LCD examples in there. It can be found at:
STM32F4DIS-BB Discover More Software Examples
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel