A small mobile phone based on the Taishan School

This little gadget, made following Mr. Wu's documentation, mainly focused on learning how to light up the screen, using a 3.1-inch screen. A huge thank you
 
 
to
 
the LCSC development board team for their hard work!
This training camp took a while, and the live stream had some hiccups, but the good thing was that I could follow along and debug step by step. Because many online tutorials are outdated, and the corresponding hardware isn't readily available, the time cost for beginners to figure things out on their own is too high.
 
Although Mr. Wu's documentation is very detailed, I feel there are still many pitfalls to overcome in building this little phone. First, you need a decent computer for compiling Android; otherwise, it will either be very time-consuming or completely uncompileable. Second, you need to be careful when soldering the screen adapter board; otherwise, you might encounter problems like bridging or cold solder joints. Finally, you need to be careful with the casing; of course, it's easier without a casing, just use studs.
 
Lastly, let's talk about the Taishan problem. With the RK3566's performance and 2GB of RAM, running Android is still a bit of a stretch, and it gets quite hot even with minimal use. I think it's better suited for Linux research, but the current system image for TaiShanPai is still a bit lacking. Rockchip's SDK defaults to kernel 4.4. Hopefully, TaiShanPai can integrate into the RK35XX community soon, since other RK development boards aren't updated very frequently and mainly rely on the open-source community.
 
 
Important note:

Make sure you confirm the wiring order in the schematic; don't reverse it!
During the soldering process, you can use more solder on the FPC socket first, and then clean it with desoldering wick.
If there is no response after powering on, you can try pressing the FPC socket to see if it is a cold solder joint.

 
 
References

: LCSC Taishanpai: https://lckfb.com/project/detail/lctspi-2g-16g?param=baseInfo
Mobile Comprehensive Project: https://lceda001.feishu.cn/wiki/K51kwVQ9ViBTeDkYmsRc0YOLnle
Screen Debugging Tutorial: https://space.bilibili.com/3493269579237436/channel/collectiondetail?sid=2166974
Rockchip Documentation: https://opensource.rock-chips.com/wiki_Boot_option