USB data transmission device in high-speed data communication link and data transmission method thereof

Abstract

The invention relates to a USB data transmission device in a high-speed data communication link and a method thereof. The device comprises a USB control functional module connected with a host machine and a central control module, wherein the central control module comprises a DMA controlling unit and an ARM controlling unit connected with the DMA controlling unit, and the DMA controlling unit and the ARM controlling unit are respectively connected with the USB control functional module. The method comprises the following steps: data receiving processing operation and data transmitting processing operation. The USB data transmission device in the high-speed data communication link and the data transmission method thereof completes the data transmission by skillfully adopting the way that a hardware signal directly triggers the DMA, reduce the interruption to the CPU to the utmost extent, obviously lower the load of the CPU, and improve the efficiency and the reliability of the system. meanwhile, the principle is simple and practical, the operating process of the system is stable and reliable, the application range is broader, and especially in the high-speed data communication, the data transmission speed can reach 100 Mbps, which can meet the requirements of application of majority of communication data links.

Description

Technical field [0001] The present invention relates to the field of data communication, in particular to the technical field of high-speed data communication transmission, and specifically refers to a USB data transmission device in a high-speed data communication link and a data transmission method thereof. Background technique [0002] In the era of high-speed development of modern communications and computers, Universal Serial Bus (USB, Universal Serial Bus) is a high-speed bus interface technology applied in the field of communications. Because USB has the unparalleled high-speed data transmission of other buses and the advantages of serial bus, it has quickly become the mainstream data interface technology in the communication field. The latest USB 2.0 has increased the data transfer speed between devices to 480Mbps, coupled with the natural compatibility of USB and computer interfaces (now almost all personal computers or laptops have USB interfaces), it can be foreseen th...

AI Technical Summary

Problems solved by technology

[0007] One is to design a chip with a USB controller by yourself. Due to the complexity of the USB protocol and chip design, it takes a lot of time and manpower, and it is not easy to succeed.

[0008] The second is to use a mature commercial USB control chip to use the parallel bus of the CPU and its interface. Because the data transmission speed of the USB is very fast, this will give a huge load to the CPU during the transmission of large amounts of data and will restrict the transmission rate of the USB. Seriously affect the work efficiency of the whole system

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