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USB from Scratch — What and Why
7 Lessons-
PreviewIntroduction
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StartWhat is USB and why it took over
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StartUSB versions, speeds, and connectors: what is the difference
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StartActivity: Create your first USB project
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PreviewThe host-controls-everything model and why it matters
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StartActivity: Exploring the USB tree on a PC: host controller, root hub, devices, and the STM32 board
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StartHow to navigate the USB documents without getting lost
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USB Physical and Electrical Layer
8 Lessons-
StartDP and DM: how USB sends a single bit on two wires
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StartUSB connectors and cables: Type-A, Type-B, Type-C, micro, mini
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PreviewNRZI encoding, bit stuffing, and the sync field
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StartThe pull-up trick: how the host knows your device's speed
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PreviewJ state, K state, SE0, reset, and end of packet
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PreviewVBUS power and current limits
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StartSelf-powered vs bus-powered devices
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PreviewUSB clock accuracy and what happens when it is wrong
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USB Protocol Concepts
8 Lessons-
StartUSB topology: the tiered star (host, root hub, tiers, upstream/downstream ports, compound devices)
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StartSee the topology on your own machine — hubs, the device tree, and the 127-address limit
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StartThe four transfer types and when each is used
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StartPacket, transaction, transfer, frame: what contains what
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StartUSB packet types: Token, Data, Handshake
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StartCapture real USB traffic on your own machine (Wireshark + USBPcap)
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StartEndpoints and pipes: the channels inside a USB device
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StartDescriptors at a glance: the device's passport
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Enumeration, Descriptors, and First Detection
8 Lessons-
StartThe enumeration handshake: what happens in the first 100 ms
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StartReading the enumeration handshake in Wireshark
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StartSetup packets and the control transfer flow
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StartDescriptors deep-dive: device, configuration, interface, endpoint, string
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StartRead a real device's descriptors (USB Device Tree Viewer / lsusb -v)
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StartVID/PID assignment: where you actually get one
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StartSTM32F303CC USB peripheral overview
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StartPull-up GPIO control: runtime attach and detach
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Embedded USB Programming on STM32: Build Real USB Devices
Learn USB firmware development on STM32 microcontrollers through practical embedded systems projects and applications.
Course Curriculum
FASTBIT EMBEDDED BRAIN ACADEMY
Instructor
