Based on CH559 wireless dual USB handle

1. Introduction to CH559

First, let’s put up the official CH559L description for a brief understanding.

    The CH559L chip is an enhanced E8051 core microcontroller compatible with the MCS51 instruction set. 79% of its instructions are single-byte single-cycle instructions, and the average instruction speed is 8 to 15 times faster than the standard MCS51.

    CH559L supports the highest system frequency of 56MHz, built-in 64K program memory Flash-ROM and 256 bytes of internal iRAM and 6K bytes of on-chip xRAM. Some xRAM supports DMA direct memory access.

    CH559L has built-in ADC analog-to-digital conversion, 4 sets of timers and PWM, dual asynchronous serial ports, dual SPI and other functional modules, as well as a built-in dual-port Root-HUB, supporting USB-Host host mode and USB-Device device mode.

The above is the introduction of CH559L in the official document. You can download and view the details by yourself.

    Latest document download link: http://www.wch.cn/downloads/file/212.html?time=2020-10-02%2009:32:26&code=9cfmsSUjcREzeMl5wtmFxnGCdxmbJDoCgz7XCiHf

    Note: CH559 has 2 packages, only CH559L can support 2 USB-HUBs at the same time, and CH559T only supports one.

2. Board description

    CH559L can be downloaded directly via USB. I did not draw the TTL to serial port in the schematic diagram, but USB downloading requires powering on again every time. I have not found a solution. If you know anything, you can leave a message in the comment area. The serial port can be downloaded without re-powering on, and debugging is more convenient.

    I use this video to upload controller data. You can plug in mouse, keyboard, USB flash drive and other HID devices here. You need to change the program a little. I left the ESP8266 and Bluetooth serial ports for uploading data. It depends on what you think. What is used, and the board can directly remove the unimportant LEDs, so that a very small board can be prototyped and used.

If you want to retain the level conversion circuit of WS2812, you can use a 1N4148 plus a 4.7K pull-up resistor for level conversion. I have also tried it. You can directly replace the TXB0102 in the schematic diagram. For the specific connection method, click the link: https:/ /www.jianshu.com/p/4fc9bcfd9c4c

3. Board code

     GitHub link: https://github.com/w-strive/CH559--USB-HUB-

     There is also code available for download in the attachment.

     Regarding ESP8266 compiling firmware or nodemcu compiling firmware by itself, you can watch the video of my B station (https://space.bilibili.com/124402993)

4. Engineering video introduction

     B station link: https://www.bilibili.com/video/BV1Ap4y1Y7MC/