CatiumDeck V1 Mini PC

## Hardware part
+ 2 USB2.0 Type-A sockets (host)
+ 1 USB2.0 Type-C socket (host)
+ 1 USB2.0 Type-C serial port
+ 3.5mm headset
+ 2.8-inch 320*240 screen
+ 1 TF card slot (boot device)
+ RTL8188 wireless network card
+ onboard MIC

### The main control
adopts **Allwinner V3s** as the main control, ARM Cortex-A7 architecture, integrated 64MB memory
### The USB
board has an SL2.1A splitter, which is only used as HOST mode. One way is connected to the wifi network card, one way is connected to Type-C, and two ways are connected to Type-A.
### Screen
The screen uses [spi screen worth more than ten yuan from Taobao](https://item.taobao.com/item.htm?spm=a1z0d.6639537/tb.1997196601.136.41a17484YtEW7u&id=682140966071) ili9341 driver
### PCB
Jiali Chuang 4-layer board 75mm*45mm, eligible for free proofing, pay attention to the lamination structure (see production precautions)
## For the firmware part,
you can see the attached `note.md` which has notes from the development.
It is strongly recommended to read `note.md` before compiling it yourself
### The kernel
mainline is linux5.19, and some source code has been modified to solve the driver problem (see [driver problem of the screen](https://whycan.com/t_9744.html))
### Third-party driver
The driver of RTL8188 is a third-party one. For the transplantation method, see [here](https://whycan.com/t_5687.html)
### Firmware
Baidu disk link
```
Link: https://pan.baidu.com/s/1ydfj_432ehrUulL0syJ_sQ?pwd=t04g
Extraction code: t04g
```
## Production precautions
+ Please use the `JLC04121H-7628 (general recommendation/free) structure` impedance for PCB proofing, which involves the problem of USB differential line.
+ Manual soldering of the main control chip can be done by pure soldering iron drag tin soldering and then tinning from the back. The tin can be selected at low temperature for easy operation

## Hardware known issues
1. PCB Layout 1V8 DCDC has a filter capacitor (`C2`) that is placed in the wrong position. It should be placed close to the DCDC, but it was placed next to the USB power input port, but it has been verified that **it does not affect the use**.