[Training Camp] Chuanzhi Education Hi3861 The kicking dog

Question requirements

Question analysis

Overall design plan block diagram

Schematic design instructions

1. Lithium battery charge and discharge module, using SP4522B to realize charge and discharge management of single-cell lithium battery
   
2. Lead out the I2C interface, and later can expand the PCA9685 module or other I2C interface modules
   
3. Lead to the download interface and use the downloader to download the program
   
4. Lead out GPIO5, GPIO6, and reserve the serial port 1 function. The serial port can be used to read MPU6050 attitude data later.
   

PCB design instructions

1. Length and width are 80mm*40mm
   
2. No wiring or copper pouring is allowed under the Hi3861 module antenna.
   

PCB physical verification

1. Welding is easy.
   
2. The designed lithium battery charge and discharge module was removed because the current required by Hi3681 in standby mode did not meet the continuous discharge requirements.
   
3. The power supply part is changed to an external 5V power supply.
   
4. I encountered a problem when connecting to the serial port and could not connect. The final investigation was caused by level conversion added to the GPIO pin of the main control module.
   

Installation process

Software description

1. The official case is still used, the number of servos and the PWM output interface are modified, and the content of the web page is simply modified.
   
2. The PWM driver of the master GPIO is inappropriate (poor design, the master PWM output can only reach a minimum of 2441Hz).
   
3. Still use IIC to control the external PCA9685 module.
   

#include<stdio.h>
void main()
{
printf("Hello, Chuanzhi Education."/n);
}

Physical display instructions

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