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Linux Framebuffer drivers for small TFT LCD display modules. Development has moved to https://git.kernel.org/cgit/linux/kernel/git/gregkh/staging.git/tree/drivers/staging/fbtft?h=staging-testing
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MI0283QT-9A - White Screen when touched #60

Closed CarstenKochems closed 10 years ago

CarstenKochems commented 10 years ago

Hello,

I installed the newest image from rasbian 2013-12-20-wheezy-raspbian

and installed FBTFT like here: https://github.com/notro/fbtft/wiki#install

i got a problem i installed the MI0283QT-9A and wired like this: https://github.com/notro/fbtft/wiki/LCD-Modules#watterott-mi0283qt-9a

i set it up with this: sudo modprobe fbtft_device name=mi0283qt-9a cs=0 rotate=1 gpios=reset:25,led:18 speed=16000000 sudo modprobe fb_ili9341 sudo modprobe ads7846_device cs=1 speed=2000000 model=7846 pressure_max=255 x_min=250 x_max=3780 y_min=160 y_max=3930 x_plate_ohms=60 gpio_pendown=17 keep_vref_on=1 sudo FRAMEBUFFER=/dev/fb1 startx & DISPLAY=:0 xinput --set-prop 'ADS7846 Touchscreen' 'Evdev Axis Inversion' 1 1

because modprobe ili9341fb brings an error the display starts normaly but when i toucht the display i get i white screen and no more responing, till i reboot.

Any Idea??

notro commented 10 years ago

It's a known problem. Read this thread from this post to the end: http://www.raspberrypi.org/phpBB3/viewtopic.php?p=385032#p385032 I have sent an email to Watterott to see if they have found a solution to this. Will report back when I get an answer.

CarstenKochems commented 10 years ago

Thank you for your quick reply :)

notro commented 10 years ago

I have been in contact with Watterott, and they can run the display with touch at 32MHz. They have the display connected through a shield they sell (short wires).

I think at least two things can cause this behaviour:

When I was running the Pi off of my laptops USB port (500mA), I could easily break the display setup (white). When I switched to a 2A USB charger, I couldn't break it at 16MHz. I couldn't run it at 32MHz with touch, but that is likely because I have a 16cm flat cable between the Pi and the display.

With full power backlight the display draws 150-200mA.

notro commented 10 years ago

Closing issue since there has been no activity for more than 2 months. Reopen if needed.