#The7thLiChuangElectricityContest#USB voltage and current meter

Note: * is a required field,
please fill it in during the registration stage↓
 
* 1. Project function introduction
[USB power meter + serial communication + CAN communication + serial port expansion] integrates voltage and current detection functions, device selection and circuit design support 24V 5A USB voltage and current acquisition, USB current sampling uses milliohm resistors; it also integrates an external current sampling channel, which is realized by CC6920B current sensor, and the sampling range is ±5A. The sampling results are displayed locally on a 0.91-inch screen, and sent to other required devices through serial communication (complete test passed) and CAN communication (using the CAN core of the microcontroller, the CAN transceiver and matching resistor are set on the board, and there is no CAN data reception).
At the same time, in order not to waste the USB data interface, the CH340E USB to serial port chip is integrated on the board, which can be used as a serial port peripheral of the computer for communication. After testing, the transceiver function is normal.
In addition, in order to facilitate debugging and downloading, the board inherits the BOOT and reset buttons pressed on the side, as well as 2 program debugging lights LED3 and LED4. LED1 and LED2 are used as communication status indicators for extended serial port communication.
 
*2. The project attributes
are first public, original, no award, no defense
 
* 3.
Please enter the content of the open source agreement...
GPL3.0
Note: Altruism is self-interest, please read the following content carefully.
Embrace open source and give the project unlimited value. It is recommended that more than 80% of the core functions
of the project be open source; if a part of the function is irreplaceable and the project cannot solve the corresponding problem after deletion, then the function implemented by this part is the core function of the project; for example, an electronic load is designed and a host computer software is designed to monitor power changes, then the electronic load is the core function, and the host computer software is an auxiliary function; for example, an isolated 485 module is used in the electronic load to communicate with the host computer, then the communication function implemented by this 485 module is an auxiliary function;
the project should choose an open source protocol that suits it. If the project references other open source projects, the source should be indicated and the original author's open source protocol regulations should be followed; original projects are recommended to use the GPL3.0 open source protocol;
functions directly referenced from the original circuit or original code of the open source project cannot be used as the core function of your own project, and functions directly implemented using general modules on the market cannot be used as the core function of your own project.
 
Please fill in the form during the competition stage↓
 
*4.
Please enter the content for the hardware part…
N32G430C8L7_MCU+CH340E+CC6920BSO-5A+IN199+SIT65HVD230DR+HE2031A33MPR
Note: It is recommended to use Jiali Chuang EDA. If you choose other EDA tools, please upload the schematic diagram in PDF format, the PCB drawing in PDF format, and the PCB file in Gerber format in the attachment. Here you can explain in detail the implementation principle and mechanism of your project, precautions, debugging methods, testing methods, etc. It is recommended to introduce your ideas to others in the form of pictures and texts.
 
*5. Based
on the official history, the software part has corrected the coefficient, added the external current measurement function, added the CAN communication and serial communication outbound function of the measurement results, and modified the display content.
 
 
 
*6.
See the project file for the BOM list
 
Note: The BOM list involved in the project. Please upload a screenshot of the BOM in this position. Please upload the list details in PDF format to the attachment. It is recommended to include model, brand, name, package, procurement channel, purpose, etc. The specific content and form should be based on the clear expression of the project composition.
 
*7. Please upload the project picture containing the competition logo
for verification
. The logo is printed on the PCB in the form of silk screen.
Click zip to download the competition logo! (Competition logo).zip
 
* 8. Demonstrate your project and record it into a video and upload it.
See the attached
video requirements: Please shoot in horizontal mode, with a resolution of not less than 1280×720, in Mp4/Mov format, and a single video size limited to 100M;
video title: LiChuang Electric Race: {Project Name}-{Video Module Name}; such as LiChuang Electric Race: "Autonomous Driving"-Team Introduction.
 
More details: https://diy.szlcsc.com/posts/d76d9cb41705430e9a54e7a5feed07a5