Making USB devices – end to end guide to your first gadget (popovicu.com)

Article summary

The article provides an introduction to making USB devices, covering the basics of USB, including hardware and software aspects, and guides the reader through building a simple USB device using an STM32 microcontroller. It explains the concept of differential pairs, impedance, and protocol layers, and provides an example of building a serial port device. The article aims to give a basic understanding of USB and its implementation. It also touches on the use of development boards and microcontrollers for USB device development.

Main themes

• USB device development
• Microcontrollers
• Differential pairs and impedance
• USB protocol and software
• Development boards
• Hardware design

What commenters say

• Using an ST microcontroller for USB device development can be more complex compared to other options like the ESP32 ecosystem.
• Differential pairs and impedance are important considerations for high-speed USB designs, but may not be a concern for beginners or low-speed applications.
• The $6,000 fee for a USB Vendor ID can be a significant barrier for small businesses or hobbyists, but some companies offer free or low-cost alternatives.
• Some commenters argue that the USB Vendor ID system is not a significant issue, as many companies can get a free Product ID from their chip manufacturer or use a shared ID for hobbyist projects.
• Others disagree, stating that the limited number of available Vendor IDs and the cost of obtaining one can be a problem for small businesses or organizations that need to deploy multiple devices.
• There are alternative options for obtaining a Vendor ID, such as licensing from companies that have already purchased a VID, or using a shared ID for open-source hardware projects.
• The USB-IF's policy on Vendor IDs and Product IDs can be restrictive and may not accommodate the needs of all developers, particularly those working on small-scale or niche projects.