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#1
Discussion - EVE / Re: BT82x
Last post by BRT Community - July 11, 2025, 02:22:18 PM
Hi Rudolph,

We use an HDMI to LVDS board here for testing too, you can find details of the board that we use in chapter 9 of this new application note below,

https://brtchip.com/wp-content/uploads/2025/06/BRT_AN_092-BT820-Hardware-Design-Example.pdf

You can use a camera with HDMI output or even a laptop with HDMI monitor output to input video to the BT820B,

Best Regards, BRT Community

#2
Discussion - EVE / Re: Screen flip on a FT813
Last post by Rudolph - July 11, 2025, 01:38:27 PM
That indicates that you did the touch calibration without rotation.
Either use CMD_SETROTATE which also adjusts the touch transform matrix, or calibrate the touch after setting REG_ROTATE.

Edit: damn, 35s too slow because I had to get up and turn off the washing mashine.  :)
#3
Discussion - EVE / Re: Screen flip on a FT813
Last post by BRT Community - July 11, 2025, 01:37:02 PM
Hi Maria,

To get your touch working, we recommend to use the CMD_SETROTATE instead of the register write. The command writes the REG_ROTATE register for you but also does the touch rotation.

If you calibrate your touchscreen after start-up and then use the command, this will rotate your touch as well as your graphics, and so the touch will work well across the full screen.


Best Regards, BRT Community



 
#4
Discussion - EVE / Screen flip on a FT813
Last post by maria@dsg-id.com - July 11, 2025, 12:22:42 PM
Hello:

I am making a new display on a ft-813 and want to rotate it so I can see the information with the display in portrait.

I have tried the REG_ROTATE = 2 and I rotate the drawings, texts and rectangles but the touch only works in half of the screen. would there be any way to solve that and that the touch works on the entire screen?
if there is no way to rotate the texts, because the rectangles with paint x and y would solve it, but the texts I can not find a way.

Thank you very much
#5
Discussion - EVE / Re: BT82x
Last post by Rudolph - July 10, 2025, 07:36:43 PM
Quote from: Matrix Orbital on July 09, 2025, 09:46:07 PMFrankly trying to figure out what the point of this new EVE5 is.

Yes, I get that.
I wondered what the target is the BT820 was designed for.
But then I am nowhere near anything that could be considered a business case. :-)

Definately an upgrade over the BT817.

I would buy a 12" just for the heck of it, the 15.6" that was advertized, if that is the only option.
But no idea what to actually do with these.
15.6" is an absolute unit of a freaking monitor, if you are doing embedded.

Heck, just today I finished another CAN-Display for a demonstrator using an EVE3-50G.
Unfortunately still no EVE4-xx in my collection and no feasible way to buy one that I know of.

I could totally see the BT82x replacing the BT81x for resolutions beyond 800x480, but even a 5" with 800x480 would work for me if that meant at least getting the SD card interface.
The board complexity that the BT820 requires might be a bit much for anything less than 10".

Quote from: BRT Community on July 10, 2025, 02:27:28 PMOur new BT820B combines the many benefits of our earlier EVE devices (including their graphics, touch and audio capability) with even more powerful graphics capabilities.
- Directly drive large LVDS panels up to 1920 x 1200 e.g. 15.6" panels
- Use high-resolution live video in your UI easily, and without it passing through the MCU
- Pre-processing to add effects and improve the video stream without MCU workload

Well now, I still have not managed to find a LVDS video source for the VM820C.
I just ordered a AT070TN909294 which converts HDMI or VGA to LVDS or TTL, practically a board that you would expect to find in a monitor.
I am not sure if I can actually use it though, it will be interesting to tinker with.
And I bought a USB/HDMI adapter as my graphics card "only" has a DP free for use, but it turned out to be falsely advertized garbage that does not work with Win11.
I am considering to use a RP2350 to generate the HDMI output to play with.
As I only have a 1024x600 display I would like to use a video source with a reslution lower than that.

Buying a camera turned out to be tough.
The simple ones use MIPI-CSI or USB and MIPI-CSI to LVDS converters do not seem to exist.

So, "live video" "easily" is something I can not confirm at this point and without input to play with there was no exploring for me what could be done with the video.

Well, I do not have an application for video input, for me personally a BT82x with reduced features would do, embedded DDR3, no LVDS input, no flash interface in favour of the SD card interface.
But again, no business case, unfortunately, would love to work on products that sell in numbers, would make sourcing displays a lot easier.  :)
#6
Discussion - EVE / Re: BT82x
Last post by BRT Community - July 10, 2025, 02:27:28 PM
Hi Rudolph, Maria,
 
Thanks for your inputs on these items, please note that there will be some integrated modules coming soon for BT820B and so we'll keep you posted here.
 
Hi Matrix Orbital,
 
We have to say, the ability to make a stunning full-colour touch-enabled GUI on an LVDS 15.6" panel with high-resolution images and fonts, touch icons overlaid and live video (with pre-processing) driven by some very cost-effective MCUs is really quite impressive.
 
Our new BT820B combines the many benefits of our earlier EVE devices (including their graphics, touch and audio capability) with even more powerful graphics capabilities.
- Directly drive large LVDS panels up to 1920 x 1200 e.g. 15.6" panels
- Use high-resolution live video in your UI easily, and without it passing through the MCU
- Pre-processing to add effects and improve the video stream without MCU workload
- The ability to render very complex graphics by combining the above with a frame buffer
- and many more...
 
These make the BT820B ideal for all kinds of products and applications embracing the latest UI trends including large hi-res displays, more complex UIs with lots of waveforms and controls, and in some cases live video etc.   The BT820B is therefore ideal for both new product designs and existing EVE designs being updated.

Best Regards, BRT Community
#7
Discussion - EVE / Re: BT82x
Last post by maria@dsg-id.com - July 10, 2025, 06:26:37 AM
Hi Rudolph:

Thank you very much for your clarification, the problem is that there is still no module integrated with the BT820, on the RIVERDI page it announces that one is coming out but with a 15'' screen but they don't say for when, and I need to start studying this micro.
Before buying anything I'm going to pass to my hardaware department what you tell me about the screens and they will look at me to see which is the best fit to start working.
Thank you very much

#8
Discussion - EVE / Re: BT82x
Last post by Matrix Orbital - July 09, 2025, 09:46:07 PM
Quote from: Rudolph on July 08, 2025, 06:23:04 PMBoth the NHD-7.0-800480AF-LSXP-CTP and the RVT70HSLNWC00 should work.

Adapting either of these to the VM820C is a bit of a challenge though.
The 30-position 2mm header CN2 on the VM820C has no pins for the backlight-LEDs.
And the pins for the backlight-controller on the VM820C are only connected to CN4.

The 45-postion FFC header CN4 is not compatible with the display connectors and is missing a couple of signals, so you need an adapter board to connect to either of these.

Connecting to the NHD-7.0-800480AF-LSXP-CTP might be a bit easier as it does not require VGL and VGH signals, but the RVT70HSLNWC00 does.

Both display have a 40pin FFC connector and the pinout is almost the same.
The NHD-7.0-800480AF-LSXP-CTP however deviates a little from one of the de-facto standard pinouts and has LED-K on pins 36/37 instead of 31/32.

The RVT70HSLNWC00 could be connected to a PCB800182 LCD adapter which I also used to connected my 1024x600 7" to, I reverse-engineered these adapters here: https://github.com/RudolphRiedel/PCB800182_LCD_Adapter
See above in this thread, I ended up not using the backlight-controller on the VM820C.

Now for the touch controller, both should work with the BT820, logically.
However, the NHD-7.0-800480AF-LSXP-CTP is using a 6-pin FFC that is not compatible with CN9 on the VM820C.
And RVT70HSLNWC00 uses a 10-pin FFC.
-> you need adapter boards to connect to either CN9 on the VM820C, or, what I found easier to do, connect to CN8 on the VM820C with wires using a cheap generic FFC breakout board on the display side.


Yeah, I wonder what the holdup is, I would be in the market for a fully integrated BT820 display module.




Frankly trying to figure out what the point of this new EVE5 is.
#9
Discussion - EVE / Re: Scissor & asset loading is...
Last post by pauljiao - July 09, 2025, 10:22:05 AM
can you share the picture or ESD project here?  It will be helpful to understand your question.
#10
Discussion - EVE / Re: BT82x
Last post by Rudolph - July 08, 2025, 06:23:04 PM
Both the NHD-7.0-800480AF-LSXP-CTP and the RVT70HSLNWC00 should work.

Adapting either of these to the VM820C is a bit of a challenge though.
The 30-position 2mm header CN2 on the VM820C has no pins for the backlight-LEDs.
And the pins for the backlight-controller on the VM820C are only connected to CN4.

The 45-postion FFC header CN4 is not compatible with the display connectors and is missing a couple of signals, so you need an adapter board to connect to either of these.

Connecting to the NHD-7.0-800480AF-LSXP-CTP might be a bit easier as it does not require VGL and VGH signals, but the RVT70HSLNWC00 does.

Both display have a 40pin FFC connector and the pinout is almost the same.
The NHD-7.0-800480AF-LSXP-CTP however deviates a little from one of the de-facto standard pinouts and has LED-K on pins 36/37 instead of 31/32.

The RVT70HSLNWC00 could be connected to a PCB800182 LCD adapter which I also used to connected my 1024x600 7" to, I reverse-engineered these adapters here: https://github.com/RudolphRiedel/PCB800182_LCD_Adapter
See above in this thread, I ended up not using the backlight-controller on the VM820C.

Now for the touch controller, both should work with the BT820, logically.
However, the NHD-7.0-800480AF-LSXP-CTP is using a 6-pin FFC that is not compatible with CN9 on the VM820C.
And RVT70HSLNWC00 uses a 10-pin FFC.
-> you need adapter boards to connect to either CN9 on the VM820C, or, what I found easier to do, connect to CN8 on the VM820C with wires using a cheap generic FFC breakout board on the display side.


Yeah, I wonder what the holdup is, I would be in the market for a fully integrated BT820 display module.