i.MX Processors中的主题 Re: rgb interface

rgb interface

sreekanthpk — Fri, 05 Feb 2016 09:32:55 GMT

hi,

I am trying to interface a 7" tft display with the imx6q sabrelite board. have configured the yocto for the gui.Can anybody suggest or provide some sample progams about how to configure when we touch a particular point in the display? The interface is I2C

Re: rgb interface

gary_bisson — Fri, 05 Feb 2016 09:53:12 GMT

Hi,

Please provide the following information:

reference of the 7" tft display
reference of the touch screen controller
yocto version (branch)
linux kernel version

Regards,

Gary

Re: rgb interface

sreekanthpk — Fri, 05 Feb 2016 10:45:37 GMT

hi,

the display is from edt technologies : E T M 0 7 0 0 H 3 D H 6

800*480 resolution

18 bit rgb interface

Touch screen controller : Processor TMPA900CMXBG, 200 MHz

Linux version : ubuntu 14.04

Re: rgb interface

gary_bisson — Fri, 05 Feb 2016 12:51:11 GMT

Hi,

The ETM0700H3DH6 does not seem supported by the kernel by default. Therefore you will have to add the timings to the lcdif_modedb array:

linux-imx6/mxc_lcdif.c at boundary-imx_3.14.28_1.0.0_ga · boundarydevices/linux-imx6 · GitHub

Then you will need to modify the device tree accordingly:

linux-imx6/imx6qdl-sabrelite.dtsi at boundary-imx_3.14.28_1.0.0_ga · boundarydevices/linux-imx6 · GitHub

I assumed your kernel version was 3.14.28, Ubuntu 14.04 being the OS version which can run on any kernel version.

Finally for the touch screen controller, since this is a regular mcu, it all depends on the firmware flashed to it, you'll most likely have to create a custom driver for it.

Regards,

Gary