#The 7th Lichuang Electric Competition# USB power meter based on N32G430C8L7

Note: * is a required field,
please fill it out during the registration stage↓
 
* 1. Project Function Introduction
USB ammeter based on N32G430C8L7+INA199, with an accuracy of 1%, can check the current and voltage when USB is working.
 
Note: The topic is not limited, it can be a solution to a problem in life/work, a solution designed for a certain group of people/scene, a graduation project/course design/DIY project/purely cool project, etc. Mainly talk about what problem you solved by what means.
 
*2. Project Attributes
Summer Training Camp
 
Note: Please indicate whether the project is publicly disclosed for the first time; whether the project is original; whether the project has won awards in other competitions, if so, please describe the details of the award; whether the project has participated in the defense at school.
 
* 3. Open Source Agreement
GPL3.0
 
Note: Altruism is self-interest, please read the following content carefully.
Embrace open source and give unlimited value to the project. 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 deleting it, then the function implemented by this part is the core function of the project; for example, if an electronic load is designed and a host computer software is designed to monitor power changes, 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 should be followed; the original project is recommended to use the GPL3.0 open source protocol;
the functions implemented by directly referencing the original circuit or original code of the open source project cannot be used as the core functions of your own project, and the functions directly implemented by using the general modules on the market cannot be used as the core functions of your own project.
 
Please fill in the following in the competition stage↓
 
*4.
Please enter the content for the hardware part...
The N32 series IC of National Technology is used as the main control, which has the advantages of less peripheral circuits, low price and powerful functions. The current sampling IC uses TI's INA199A1DCKR, and the buck circuit uses LDO AMS1117-3.3. The display uses OLED and IIC timing.
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.
Please enter the content of the software part...
The case uses STLINK for burning. The serial port is reserved in the hardware design. I want to add some code to realize the function of serial port debugging and downloading. The burning program is successful, the chip power supply is normal, and the charging function can be realized, but the OLED screen is not bright. At first, it was thought to be a problem with the screen. Later, an oscilloscope was used to detect the IIC signal and found that there was no waveform output. More progress will be made later.
Note: If your project involves software development, please upload the corresponding engineering source code in the attachment. Here you can explain in detail your software flow chart, functional module block diagram, explanation or popular science of related algorithms, source code structure, compilation environment construction and configuration, source code compilation method, program burning method, etc. It is recommended to introduce your ideas to others in the form of pictures and texts.
 
*6.
Please enter the content of the BOM list...  
Note: The BOM list involved in the project. Please upload a screenshot of the BOM in this location. Please upload the list details in PDF format to the attachment. It is recommended to include model, brand, name, package, procurement channel, purpose and other content. The specific content and form should be based on the clear expression of the project composition.
 
*7. For competition LOGO verification
 
, please upload a project picture containing the competition logo. 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 to upload.
 
Video requirements: Please shoot in horizontal mode, and the resolution is not high. 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