# Sixth Lichuang Electric Competition# Stepper motor serial port drive controller

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* 1. Introduction to project functions

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The motor is controlled through the serial port to achieve silent operation, smooth operation, built-in acceleration and deceleration, and built-in limit. Save main control MCU resources, optimize subsequent product routing, and improve overall development efficiency.

Note: There is no limit to the theme. It can be a solution to a certain problem in life/work, a plan designed for a certain group of people/scenarios, graduation project/course design/DIY project/purely cool project, etc. Mainly talk about what problems you solved by what means.

*2. Project attributes

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This project is made public for the first time and is original.

Note: Please indicate whether the project has been made public for the first time; whether the project is original; whether the project has won awards in other competitions; if so, describe the details of the award; whether the project has participated in a defense in school.

* 3. Open source agreement

GPL3.0

Note: Altruism means self-interest, please read the following content carefully.

1. Embrace open source and give projects unlimited value. It is recommended that more than 80% of the core functions of the project be open source;
2. If a certain 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, if an electronic load is designed and a host computer software is designed to monitor power changes, the electronic The load is the core function, and the host computer software is the 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;
3. Projects should choose an open source agreement that suits them . If the project references other open source projects, the source should be indicated and follow the original author's open source agreement. It is recommended that original projects use the GPL3.0 open source agreement;
4. Functions implemented by directly quoting the original circuits or original codes of open source projects cannot be used as the core functions of one's own projects, and functions directly implemented using common modules on the market cannot be used as core functions of one's own projects.

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*4. Hardware part

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The hardware design mainly refers to the specification book of TMC5130. The hardware is not very difficult. The main reason is that the PCB layout needs to be continuously optimized. The entire circuit board is only 39*39mm, which contains LDO circuit, MCU circuit, TMC driver circuit, Two-way optocoupler circuit, 485 circuit. There is still some difficulty. In addition, it needs to be explained that in order to facilitate the demonstration and aesthetics, I specially learned 3D design. The circuit board shell, the turntable and the fixed frame on the shaft were all 3D printed at Jialichuang. The price is not expensive. This is a must. Thumbs up.

Note: It is recommended to use Lichuang EDA . If you choose other EDA tools, please upload schematics in PDF format, PCB drawings in PDF format, and PCB files in Gerber format in the attachments. Here you can explain in detail your project implementation principles and mechanisms, precautions, debugging methods, testing methods, etc. It is recommended to introduce your ideas to others in the form of pictures and texts.

*5. Software part

Just download the source code for the software and use KEIL5 to design it. The process is to use one motor module among the three motors as the main control module to coordinate and control the other two motor modules. From the video, you can see that the two motors on the sliding table need to maintain a high degree of consistency, so here is The slide motor is used as the main control motor to control the other two motors. One thing to note here is that each motor still has slight characteristics, resulting in a slight difference in rotational speed under the same parameters. It is fine for short-distance running, but it will still be obvious for long-distance running. Here you need to constantly Debugging made the actual speeds of the two motors consistent.

Note: If your project involves software development, please upload the corresponding project source code in the attachment. Here you can describe in detail your software flow chart, functional module block diagram, explanation or popular science of related algorithms, source code structure, construction and configuration of compilation environment, 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. BOM list

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Note: BOM list involved in the project. Please upload a screenshot of the BOM at this location. Please upload the list details in PDF format to the attachment. Suggestions include model, brand, name, packaging, procurement channels, usage, etc. The specific content and form should be based on clearly expressing the project composition.

*7. Contest LOGO verification

Please upload a project picture containing the competition logo. The logo will be printed on the PCB in the form of silk screen printing.

Click the zip to download the competition logo! (Contest logo).zip

* 8. Demonstrate your project and record it as a video for uploading

Video requirements: Please shoot horizontally, with a resolution of no less than 1280×720, in Mp4/Mov format, and the size of a single video is limited to 100M;

Video title: Lichuang Electric Competition: {Project Name}-{Video Module Name}; such as Lichuang Electric Competition: "Autonomous Driving" - Team Introduction.

More details: https://diy.szlcsc.com/posts/06c94d90c2c447dfbd9ed7339ff4a5b1