The USB interface is used to specify the connection and communication of the computer and external devices. At present, the mouse, keyboard, charger, etc. are used using a USB connection interface, and the use is wide. As a high-speed communication interface between the PC and the peripheral device, USB has many outstanding advantages: easy to connect, hot plug, no need to position and run the installer, there is no need to connect to the peripherals and restart the system, realize true Plug and play. In response to the benefits of USB interface, sharing a classic production case based on USB interface, depth analysis of USB interface technology.
1, USB2.0 camera STM32F407 + OV9712 + USB3300 USB video type IAR project PCB file + source code
The project is IAR project. USB High Speed Mode - Device Mode - Video Class, Static 320 * 240 Picture Send to Computer, frame rate 400fps, 20Mb / s.
The static picture is stored in the SRAM after the JPG is compressed, and then sent to the computer via USB.
The lower machine program USB driver is the STM32 USB standard firmware library.
Video transmission can be developed on this basis.
https://www.cirmall.com/circuit/11387
2, 7-port USB2.0 HUB and FT4232 USB to 8 serial port based on USB2517i
Use the USB2517I to turn the 7-port USB2.0 HUB, and use two FT4232 to implement the USB to 8 serial port, 8 serial ports, there is two ways to configure the serial port to RS485 by the official software of FTDI. Input power is recommended for 5V3A. The circuit has been verified and used for actual projects.
https://www.cirmall.com/circuit/13850
3, USB TYPE-C transfer HDMI with PD USB3.0 / USB3.1 3.5MM Audio Output Dock Dock (PCB)
This article is mainly to explain the USB TYPE-C transfer HDMI + PD + USB3.0 / USB3.1 Dock Dock Design Scheme and Design Reference Circuit. The implementation of this function is mainly designed in Taiwan Ange AG9311MCQ chip. First, we will explain out the entire program from the performance and parameter characteristics of AG9311 MCQ, as well as packaging methods and pin descriptions, design structural block diagrams, and actual design reference circuits.
https://www.cirmall.com/circuit/18358
4, CH340 USB turn serial port, USB transfer print, USB transfer IRDA solution
The design plan CH340 USB serial port, USB transfer port, USB turn IrDa schematic diagram and PCB, serial port containing DB9 RS232, low cost RS232, TTL's UART, etc., print, display DB36 connector, DB25 plug Two versions of holes, USB infrared adapters, USB turn Irda contains 6 feet, 8 foot infrared transceivers, can be used for OEM product manufacturers.
https://www.cirmall.com/circuit/6363
5. USB 3.0 HUB based on TUSB8041 (schematic, source)
This design is an ultra-high-speed spinner that meets USB 3.0 requirements and has 5V fast charging characteristics. This design is from principles, wiring, procurement, and manufacturing, all of them personally, the materials are exquisite, and the stability is strong. I respect the idea of opening sources, I hope that through such a simple design, throwing bricks, letting domestic enthusiasts learn in sharing, communicating in learning. This is just a beginning, I will bring you more better works in the next amateur life.
https://www.cirmall.com/circuit/13127
6, USB sound card with MIC -CM108 sound card - CM108 USB DAC
This design is based on a entry-level USB sound card for Taiwan's CM108 chip design. It has a microphone input function. The three sets of parallel audio output can simultaneously refute three sets of amplifier or headphones, with SPDIF digital audio output interface, You can take advantage of higher-end decoders. This design can be produced by mass, and can be directly sampled and assembled according to the component parameters on the PCB. You can drive it on Windows and Android phones. You can also drive on Baidu search official Windows driver. This sound card is better than ordinary computer, the microphone input is good, the output thrust is large, and the sound quality is transmitted.
Https://www.cirmall.com/circuit/12357
7, USB HUB one point four Fe1.1 USB hub
Fe1.1s is highly integrated, high quality, high performance, low energy consumption, and low-cost solutions for USB 2.0 high speed 4-port lines.
This circuit has been optimized for many electrical resistance, which can help realize the low cost, DIY is simple.
The PCB strictly uses the USB differential signal trail in all high speed, full speed, and low speed mode.
https://www.cirmall.com/circuit/14552
8, STUSB4710 utility model USB PD controller board design
This design is the use of STUSB4710 and ST1S14 IC, ready-to-use USB PD sources. The USB PD controller board is used to demonstrate the characteristics of the Stusb4710 controller by converting a single voltage power source to a Type-C power source. The Stusb4710 controls Type-C port (ensuring power advertising and negotiation), controls DC-DC converters and power paths, and monitors VBUS voltage.
https://www.cirmall.com/circuit/8887
9, USB to UART / USB to serial port schematic and PCB source file, support 5V / 3V3
This design shared is the USB to UART / USB to serial port design, support 5V / 3V3, see attachment downloads its schematic and PCB source files. The USB serial port adapter is designed based on the CH340. The CH340 is a USB bus conversion chip that implements the USB conversion to a serial interface, and the USB is converted to IrDA infrared or USB converted to a printer interface. The USB to UART / USB serial port is compatible with 5V and 3V3, which can be used to upload code or communicate with the MCU.
https://www.cirmall.com/circuit/7022
10, 45W USB TYPE-C PD power adapter scheme based on STSTSTUSB4700
The Stusb4700 is a new USB power controller series that communicates with the Type-CTM Configuration Channel Pin (CC) to negotiate a certain number of power supplies to query consumer devices.
The Stusb4700 is targeted for a laptop computer, a tablet computer, and an AC adapter, etc. Provider / DFP advertising management system device. No MCU controls are required, the device can process any connection with the receiver or DRP, from the device accessory to the power supply negotiation, including VBus discharge and protection.
Stusb4700's 45W USB Type-C PD Circral Wall Power Adapter Scheme is a design basis using the STCH02 main controller and the Stusb4700 USB PD controller. There are 5 V, 9 V, and 15 V USB output voltage curves with 3 A rated value. Have ultra-low standby power consumption. USB Power Supply (PD) is managed by Stusb4700, compatible with TYPE-C: power negotiation, VBUS discharge, protection, etc. is completely managed by IC management.
https://www.cirmall.com/circuit/15942
Our other product:
