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楼主: alex001

[Question] Lost power when flashing my Lcd DMT48270C043_06WT

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发表于 2021-9-10 15:30:52 | 显示全部楼层
same card used successfully when originally downloaded the firmware (before power loss)
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发表于 2021-9-10 15:35:02 | 显示全部楼层
UdiAzulay 发表于 2021-9-10 15:30
same card used successfully when originally downloaded the firmware (before power loss)

Try the factory procedure in this link
http://forum.dwin.com.cn/forum.p ... amp;_dsign=a0345e9f
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发表于 2021-9-10 15:57:29 | 显示全部楼层
found no factory procedure on the link but a demo project, which I tried to download to the SD card (together with the it's long CFG file) but nothing happened...

is there a way to upload system OS files (T5UID1_V*.BIN, T5OS_V*.BIN) using UART or JTAG?
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发表于 2021-9-10 16:07:53 | 显示全部楼层
UdiAzulay 发表于 2021-9-10 15:57
found no factory procedure on the link but a demo project, which I tried to download to the SD card  ...

If it is determined that there is no problem with the SD card and there is no blue screen interface on the screen, it is recommended to send it to the after-sales service for treatment.
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发表于 2021-9-10 16:40:43 | 显示全部楼层
it will be easier, cheaper and faster to just buy new screen from aliexpress (and I probably will) but I thought it might be possible to recover this screen...
also tried to erase all accessible blocks of Nand (using OS builder assembler ERASE to access blocks 0x20-0x7F) and wipe the accessible NOR using VP 0x08
still nothing helped
the procedure worked and no music or icons left in the memory but it's still does not load the blue screen and VP 0x7C return 8 zeros and system config (VP 0x800) = 0xB8

since i"m able to communicate with the device using UART I thought it might be possible to upload the firmware even without the locked/non-responsive SD card.
using a small c# program i made (implementing the VP's from the documentation) i"m now able to upload pictures and fonts (and waves, which still have some mapping issue) so it's only the core system OS files that i"m unable to flash this way to finish the upgrade...

would love to get any advise
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发表于 2021-9-10 17:12:28 | 显示全部楼层
btw - software versions (VP 0x0F) are:
5A A5 06 83 00 0F 01          14  20
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