【Training Camp】A dog-legged person

[Project background] Participate in the bionic robot dog training camp and create a puppy controlled based on [ITCAST-HI3861](https://so.szlcsc.com/global.html?k=c2923578). [Project Introduction] Based on the OpenHarmony open source Hongmeng system development, the core board can control sixteen servos, all interfaces are lead out, and the burning port and I2C interface are reserved. It can support the PCA9685 finished multi-channel servo control board for subsequent dogs. Sub-function upgrade. [Application Scenario] 1. Can control robot dogs, little spiders, servos, pan/tilts, robotic arms and other products; 2. Can support more than 16 servos through I2C. For example, PCA9685 has 6 address lines and can be cascaded up to 62 A PCA9685 driver board, a total of 992 PWM channels. [Production process] 1. Complete the core board circuit design and component selection; 2. Complete the PCB board design with a size of 80x40mm; 3. Purchase relevant components and PCB proofing. 〓To be continued〓......