Embedded USB (universal serial bus) host

An embedded and mainframe technology, applied in the computer field, can solve problems such as inability to communicate directly

Inactive Publication Date: 2012-09-26
HUNAN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] With the gradual expansion of USB application fields, people's expectations for USB are also getting higher and higher. It is hoped that USB can directly communicate with USB peripherals through mobile devices such as PDAs, so that USB can be applied in fields without PCs, but this is precisely A fatal weakness of USB, the core of the USB topology is the host, any USB data transmission must be initiated and controlled by the host, all USB peripherals can only establish a connection with the host, any two There is no direct communication between peripherals or between two hosts. At present, a large number of PCs play the role of hosts. Therefore, the USB mobile devices we currently buy and use are all USB peripherals, such as USB Mobile hard disk, digital camera with USB interface, etc., all these devices can only exchange files and data with PC

Method used

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  • Embedded USB (universal serial bus) host
  • Embedded USB (universal serial bus) host
  • Embedded USB (universal serial bus) host

Examples

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Embodiment Construction

[0023] Embedded USB host method: After the microcontroller system 1 completes the system initialization, it waits for the external interrupt of the USB host controller 4. After the USB device is inserted into the host system, the USB host controller 4 notifies the microcontroller system 1 through the external interrupt signal, and the microcontroller System 1 and USB host controller 4 complete operations such as enumeration and configuration of the device, read out the data stored in the Flash disk, and send it to the display through RS232. In order to be able to visually display the operating status of the system and strengthen the control of the system, the system is provided with LED display 7 and buttons 6 .

[0024]In order to facilitate the debugging of the system, the internal operation of the single-chip system 1 can be directly reflected on the PC in a timely manner, and the RS232 protocol is used to communicate with the PC to serve as a window for debugging the entire...

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Abstract

An embedded USB (universal serial bus) host comprises a host controller, a serial port communication module circuit, a level conversion circuit and a USB downlink port circuit. The host controller comprises a single chip microcomputer system, an externally expanded ROM (read only memory), an externally expanded RAM (random-access memory), a USB master controller, a USB interface, keys, an LED display and an RS232 interface, the externally expanded ROM, the externally expanded RAM, the USB master controller, the keys, the LED display and the RS232 interface are connected onto the single chip microcomputer system, and are in data exchange with the single chip microcomputer system, and the USB interface is connected onto the USB master controller.

Description

technical field [0001] The invention belongs to the field of computers, in particular to an embedded USB host with a USB interface using embedded computer technology. Background technique [0002] The USB interface can connect as many as 127 peripherals to the user's system, and share the bandwidth of the USB through the protocol. Its 12Mbps bandwidth is enough for the mouse and other medium and low-speed peripherals, and the USB2.0 released in 2000 In the new version, the USB bandwidth has been increased to 480Mbps. USB supports plug and play, which allows peripherals to be connected, configured, used and deleted when the host and other peripherals are working. The application of the USB bus specification can replace the excessive The I / O interface of the computer is replaced by a serial interface, which makes the connection between the PC and the peripherals easier. [0003] In just a few days since the release of USB1. One of the standard protocols for connecting PCs, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/38
Inventor 黄樱曾华程
Owner HUNAN INST OF TECH
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