PCB800852 FIRMWARE ?

[RavelwareRND]

how about this board? do you have any idea how to develop a firmware for this board?

https://ae01.alicdn.com/kf/S601617b6ba85423580d4ebbea6135bbb5.jpg

[aodxxl]

Any ideea how to force 1024x600 resolution on this board? Aparently it doesnt recognise my xyx-7di hqx 7 inch display and oupts in a distorted 800x480

[MikeyJayy]

Any ideea how to force 1024x600 resolution on this board? Aparently it doesnt recognise my xyx-7di hqx 7 inch display and oupts in a distorted 800x480

any updates? I'm running with the same issue

[Invader007]

i have a stock image with a 1024x600 resolution for that board. I can upload it, if you still need it.

If you want to flash it:
I couldn't find a easy access to SDA/SCL Pins so I soldered two wires to the tiny resistors (R57 and R?7 (i think ? is a "6") next to the IC-pins (right side sixth and seventh from top) and you have to add the following Flash-ID to Rova-Tool's Flash-Devices.xml:

<FlashDevice> <Description>ZB25VQ40ATIG</Description> <Signature>0x5E126013</Signature> <Size>0x40000</Size> </FlashDevice>

[tianyulangtong]

发邮箱给我 tuanyuzhang3096@gmail.com，还有液晶屏的型号，我发给你
Send me an email tuanyuzhang3096@gmail.com, and the model number of the LCD screen, and I will send it to you.

[wxorx]

i have a stock image with a 1024x600 resolution for that board. I can upload it, if you still need it.

If you want to flash it: I couldn't find a easy access to SDA/SCL Pins so I soldered two wires to the tiny resistors (R57 and R?7 (i think ? is a "6") next to the IC-pins (right side sixth and seventh from top) and you have to add the following Flash-ID to Rova-Tool's Flash-Devices.xml:

<FlashDevice> <Description>ZB25VQ40ATIG</Description> <Signature>0x5E126013</Signature> <Size>0x40000</Size> </FlashDevice>

You can actually use DDC over HDMI for programming and reading, and this software:
https://github.com/static-void/rtd266x_programmer.git

My setup is just a Linux laptop (Thinkpad X230/ArchLinux), mini-DP to HDMI adapter

First check what i2c busses do you have:

[ipdown@x230 rtd266x_programmer]$ i2cdetect -l
i2c-0	i2c       	i915 gmbus ssc                  	I2C adapter
i2c-1	i2c       	i915 gmbus vga                  	I2C adapter
i2c-2	i2c       	i915 gmbus panel                	I2C adapter
i2c-3	i2c       	i915 gmbus dpc                  	I2C adapter
i2c-4	i2c       	i915 gmbus dpb                  	I2C adapter
i2c-5	i2c       	i915 gmbus dpd                  	I2C adapter
i2c-6	i2c       	AUX B/DP B                      	I2C adapter
i2c-7	i2c       	AUX C/DP C                      	I2C adapter
i2c-8	i2c       	AUX D/DP D                      	I2C adapter
i2c-9	smbus     	SMBus I801 adapter at efa0      	SMBus adapter

Then probe all the display ports, in my case the board responded on i2c-4, dpb:

[ipdown@x230 rtd266x_programmer]$ ./rtd_prog -d 4
I2C ready
Attempting to read chip ID... 


JEDEC ID: 0x5e6013
Manufacturer Unknown
Chip: 25VQ040
Size: 512KB
Flash status register: 0x1c
[ipdown@x230 rtd266x_programmer]$

Then backup or write, as you wish. It works over VGA too, on the PCB800099 boards.
Huge thanks to the author of this very versatile and great piece of software.

[wxorx]

I have both 1024x600 and 800x480 dumps from PCB800852 board, attached here:
PCB800852.zip

[ipdown@x230 rtd266x_programmer]$ ls -alh 1024x600-PCB800852.bin 800x480-PCB800852.bin 
-rw-r--r-- 1 ipdown ipdown 512K  2 май 22:34 1024x600-PCB800852.bin
-rw-r--r-- 1 ipdown ipdown 512K  2 май 22:30 800x480-PCB800852.bin
[ipdown@x230 rtd266x_programmer]$ 
[ipdown@x230 rtd266x_programmer]$ md5sum 1024x600-PCB800852.bin 800x480-PCB800852.bin 
a2b6d4cb1f71830910b41c094cc4c85c  1024x600-PCB800852.bin
f874e05e2a0959505e9237bb5c2f45f5  800x480-PCB800852.bin
[ipdown@x230 rtd266x_programmer]$

[CurlyWirly]

Is it possible to switch the PCB800852 to composite input and solder an AV lead to AV1 and GND? Would like to use this to go from composite on my retro PC to the attached 10.1" LCD.
LCD is FT101DD348HD-50P

[Invader007]

Is it possible to switch the PCB800852 to composite input and solder an AV lead to AV1 and GND? Would like to use this to go from composite on my retro PC to the attached 10.1" LCD. LCD is FT101DD348HD-50P

it will be much easier if you use a cheap composit2hdmi adapter or switch to PCB800099 (many firmwares, you can desolder the unused ports)

[tianyulangtong]

PCB800852, due to hardware reasons, AV IN is not supported Invader007 ***@***.***> 于2024年5月5日周日 23:54写道：

…

Is it possible to switch the PCB800852 to composite input and solder an AV lead to AV1 and GND? Would like to use this to go from composite on my retro PC to the attached 10.1" LCD. LCD is FT101DD348HD-50P it will be much easier if you use a cheap composit2hdmi adapter or switch to PCB800099 (many firmwares, you can desolder the unused ports) — Reply to this email directly, view it on GitHub <#3 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BICU4RJXXEI4EZ3BVHNRXU3ZAZIZRAVCNFSM52SVKMIKU5DIOJSWCZC7NNSXTN2JONZXKZKDN5WW2ZLOOQ5TEMBZGQ4DKOBXGQ4Q> . You are receiving this because you commented.Message ID: ***@***.***>

[tianyulangtong]

The hardware is being updated recently, the first one is PCB800851, OK LANGTONG TIANYU ***@***.***> 于2024年5月5日周日 23:57写道：

…

PCB800852, due to hardware reasons, AV IN is not supported Invader007 ***@***.***> 于2024年5月5日周日 23:54写道： > Is it possible to switch the PCB800852 to composite input and solder an > AV lead to AV1 and GND? Would like to use this to go from composite on my > retro PC to the attached 10.1" LCD. LCD is FT101DD348HD-50P > > it will be much easier if you use a cheap composit2hdmi adapter or switch > to PCB800099 (many firmwares, you can desolder the unused ports) > > — > Reply to this email directly, view it on GitHub > <#3 (comment)>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/BICU4RJXXEI4EZ3BVHNRXU3ZAZIZRAVCNFSM52SVKMIKU5DIOJSWCZC7NNSXTN2JONZXKZKDN5WW2ZLOOQ5TEMBZGQ4DKOBXGQ4Q> > . > You are receiving this because you commented.Message ID: > ***@***.***> >

[tianyulangtong]

Only PCB800099 can be selected LANGTONG TIANYU ***@***.***> 于2024年5月5日周日 23:58写道：

…

The hardware is being updated recently, the first one is PCB800851, OK LANGTONG TIANYU ***@***.***> 于2024年5月5日周日 23:57写道： > PCB800852, due to hardware reasons, AV IN is not supported > > Invader007 ***@***.***> 于2024年5月5日周日 23:54写道： > >> Is it possible to switch the PCB800852 to composite input and solder an >> AV lead to AV1 and GND? Would like to use this to go from composite on my >> retro PC to the attached 10.1" LCD. LCD is FT101DD348HD-50P >> >> it will be much easier if you use a cheap composit2hdmi adapter or >> switch to PCB800099 (many firmwares, you can desolder the unused ports) >> >> — >> Reply to this email directly, view it on GitHub >> <#3 (comment)>, >> or unsubscribe >> <https://github.com/notifications/unsubscribe-auth/BICU4RJXXEI4EZ3BVHNRXU3ZAZIZRAVCNFSM52SVKMIKU5DIOJSWCZC7NNSXTN2JONZXKZKDN5WW2ZLOOQ5TEMBZGQ4DKOBXGQ4Q> >> . >> You are receiving this because you commented.Message ID: >> ***@***.***> >> >

[tianyulangtong]

WWW.AIRDISP.COM LANGTONG TIANYU ***@***.***> 于2024年5月5日周日 23:59写道：

…

Only PCB800099 can be selected LANGTONG TIANYU ***@***.***> 于2024年5月5日周日 23:58写道： > The hardware is being updated recently, the first one is PCB800851, OK > > LANGTONG TIANYU ***@***.***> 于2024年5月5日周日 23:57写道： > >> PCB800852, due to hardware reasons, AV IN is not supported >> >> Invader007 ***@***.***> 于2024年5月5日周日 23:54写道： >> >>> Is it possible to switch the PCB800852 to composite input and solder an >>> AV lead to AV1 and GND? Would like to use this to go from composite on my >>> retro PC to the attached 10.1" LCD. LCD is FT101DD348HD-50P >>> >>> it will be much easier if you use a cheap composit2hdmi adapter or >>> switch to PCB800099 (many firmwares, you can desolder the unused ports) >>> >>> — >>> Reply to this email directly, view it on GitHub >>> <#3 (comment)>, >>> or unsubscribe >>> <https://github.com/notifications/unsubscribe-auth/BICU4RJXXEI4EZ3BVHNRXU3ZAZIZRAVCNFSM52SVKMIKU5DIOJSWCZC7NNSXTN2JONZXKZKDN5WW2ZLOOQ5TEMBZGQ4DKOBXGQ4Q> >>> . >>> You are receiving this because you commented.Message ID: >>> ***@***.***> >>> >>

[wxorx]

Any ideea how to force 1024x600 resolution on this board? Aparently it doesnt recognise my xyx-7di hqx 7 inch display and oupts in a distorted 800x480

I planned to try this, hoping that the firmware will switch automatically to the AV1 over HDMI when it detects composite video signal

[wxorx]

PCB800852, due to hardware reasons, AV IN is not supported Invader007 @.> 于2024年5月5日周日 23:54写道：
…
Is it possible to switch the PCB800852 to composite input and solder an AV lead to AV1 and GND? Would like to use this to go from composite on my retro PC to the attached 10.1" LCD. LCD is FT101DD348HD-50P it will be much easier if you use a cheap composit2hdmi adapter or switch to PCB800099 (many firmwares, you can desolder the unused ports) — Reply to this email directly, view it on GitHub <#3 (comment)>, or unsubscribe https://github.com/notifications/unsubscribe-auth/BICU4RJXXEI4EZ3BVHNRXU3ZAZIZRAVCNFSM52SVKMIKU5DIOJSWCZC7NNSXTN2JONZXKZKDN5WW2ZLOOQ5TEMBZGQ4DKOBXGQ4Q . You are receiving this because you commented.Message ID: @.>

Could you elaborate? I haven't traced where the AV1 goes routed on the PCB, but found somewhere a comment that this input is unused

[tianyulangtong]

NO AV ONLY HDMI wxorx ***@***.***> 于2024年5月6日周一 00:07写道：

…

PCB800852, due to hardware reasons, AV IN is not supported Invader007 *@*. *> 于2024年5月5日周日 23:54写道： … <#m_9091614618114776528_> Is it possible to switch the PCB800852 to composite input and solder an AV lead to AV1 and GND? Would like to use this to go from composite on my retro PC to the attached 10.1" LCD. LCD is FT101DD348HD-50P it will be much easier if you use a cheap composit2hdmi adapter or switch to PCB800099 (many firmwares, you can desolder the unused ports) — Reply to this email directly, view it on GitHub <#3 (comment) <#3 (comment)>>, or unsubscribe https://github.com/notifications/unsubscribe-auth/BICU4RJXXEI4EZ3BVHNRXU3ZAZIZRAVCNFSM52SVKMIKU5DIOJSWCZC7NNSXTN2JONZXKZKDN5WW2ZLOOQ5TEMBZGQ4DKOBXGQ4Q <https://github.com/notifications/unsubscribe-auth/BICU4RJXXEI4EZ3BVHNRXU3ZAZIZRAVCNFSM52SVKMIKU5DIOJSWCZC7NNSXTN2JONZXKZKDN5WW2ZLOOQ5TEMBZGQ4DKOBXGQ4Q> . You are receiving this because you commented.Message ID: @.*> Could you elaborate? I haven't traced where the AV1 goes routed on the PCB, but found somewhere a comment that this input is unused — Reply to this email directly, view it on GitHub <#3 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BICU4RJFAWHIAR2WNBIYQ6TZAZKNDAVCNFSM52SVKMIKU5DIOJSWCZC7NNSXTN2JONZXKZKDN5WW2ZLOOQ5TEMBZGQ4DMMRZGAYA> . You are receiving this because you commented.Message ID: ***@***.***>