What is going on?

[Rudolph]

What's up? 
It has been three weeks again since the last post while there are 75+ daily visistors listed.

I implemented all of the BT822 patch functions, or at least these that are documented so far.
Actually testing these still is difficult since the new EAB has not been released.

I would like to buy a BT82x based display module, but the options are still very limited.

Today I received a ACD-110DHTT which is a 10.1" industrial touch monitor that I got used for only 23€ from EBay, 1280x800.
And of course I only took it apart, really nice build quality, the case is machined from a block of aluminium, I do not want to know how much these cost before they were phased out back in 2019.
The panel is a G101EVN01.0 from AUO for which I even found a datasheet, LVDS, single channel, 6 bits per color.

The touch is a separate unit and will provide more challenges, it uses an eGalax Touch controller.
On the outside the interface is USB, but it does support I2C as well.


Now, what is everyone else here up to?

Edit: I really have no idea why this site is practically dead, 144 views of this post and no reaction?
Ok, stay positive. :-)


I just spent some time to check the wiring of the ACD-110DHTT and adapt it the VM820C.
As it turned out, the wire harness of the display is using the exact same 6 pin / 2mm header for the backlight than the VM820C, I only had to swap two pins. 
And for LVDS the wire harness connects to the conroller board with a 32 pin / 2mm header which uses the same crimps than the 30 pin / 2mm headers I have for the LVDS TX of the VM820C.
The pinout was slightly different, but taking out the pins from the old header and putting it in the 30pin header was really easy.

Next I put in a 1280x800 profile, checked the data format, which is JEIDA / Format 1 for 18-bit RGB, checked the clock frequency range and configured REG_LVDSTX_PLLCFG accordingly.
And, yeah, it worked on the first try. 
Even the backlight control is working, as the panel has the backlight controller integrated and takes a PWM signal to control it.

I do not have touch, did not even try to connect it, so far I have no idea if the eGalax touch controller is compatible to anything the BT820 supports.

[vdc]

I agree with you.

I want to test out the BT82x, but I can't find a suitable display module. Riverdi released a BT820B display, but it's 15.6 inches and quite expensive. I'm not sure who would buy a 15.6" display for embedded projects—5" or 7" displays are much more common. Hopefully, next year someone will release a 7" BT82x display module that I can experiment with.

[Rudolph]

Yes, the 15.6" really is some large unit of a monitor, I have no idea why that is still the only option.
I am generally interested in buying a RVT156HKBNWCA0-B, despite the price and despite that I have no idea what to actually do with it.

I do have a couple of issues with it though that I asked Riverdi about and I did not get an answer.

First of all the backlight, that cable that is sticking out to the side on the top.
Why? If I would order displays in any meaningfull quantity, I would tell the supplier to redesign that.
Riverdi did the same with the 12.1", which is one of the reasons I never bought one.

My second issue with the RVT156HKBNWCA0-B is the barrel connector to supply it.
Not only is a barrel connector not locking, that thing has a height of 11mm.
I would have preferred a 662102145021 from WE or a 505578-0271 from Molex.

So, yes, I would buy a 10" version, or even a 12.1" version if the backlight connection is fixed.
And I would opt for a way smaller external flash, like 64MBit, using the external SD card is nice.
Same with the DDR3 SRAM, 4GBit seems excessive.

[BRT Community]

Hi Rudolph, VDC,

We have a range of displays available now too from Bridgetek including a 10.1" 1920x1200 panel which you can use with the VM820C credit card module. It has a capacitive touch panel.

Here is the link to the 1920x1200 panel 10.1" display 1920x1200

We also have a 15.6" panel with capacitive touch too which you can find here: 15.6" panel with capacitive touch
 
Let us know if you have any questions on them or if you would like any further information,

Best Regards, BRT Community

[Rudolph]

While that is impressive, that does not really solve the availability of BT82x modules.
Yes, buying panels turned out to be a pain by itself, but usually that is a problem that can be solved with throwing money at it - thinking about single units here for evaluation or to play with, thinking in production level amounts I would send a suit from procurement to get me what I want (and I wish I was there).

However, the fun starts when adapting the panel to the VM820C - and the touch.
That is why I am also thinking about designing a board for the MN820.

So I prefer integrated modules.
And based on the experience with the VM820C so far, I would go for the option with 1GBit DDR3L and even no external flash (the option to solder a SOIC-8 would still be nice), as long as there is a micro-sd socket.