Method for data interaction of host and storage device and storage controller

Abstract

The invention discloses a method for data interaction of a host and a storage device and a storage controller. The method comprises a method for the host to read data from the storage device and a method for the host to write the data into the storage device, the storage controller receives a data operation command sent by the host, whether the data operation command is a writing command or a reading command is judged by the storage controller, and a command response is sent to the host; when the data operation command is the writing command, the data operation command is received and sent to the storage device, when the data operation command is the reading command, the data operation command is received and sent to the host, after data transmission is completed, the storage controller sends a command completing state to the host, and transmission is carried out based on a USB Bulk transmission protocol. When a data stream transmission mode is adopted in the host, data overflowing and loss are effectively avoided, and on the premise of guaranteeing read-write performance, the compatibility of the device and the host is improved to the maximum degree.

Description

technical field [0001] The present invention relates to a method for data interaction between a host and a storage device and a storage controller, in particular to a method for the host to read data from the storage device based on the USBBulk transmission protocol between the host and the storage device, and a method for the host to write data to the storage device. Data method and storage controller. Background technique [0002] The English of Universal Serial Bus is UniversalSerialBus, abbreviated as USB, which is one of the most widely used electronic device interfaces. USB defines four transfer protocols, Control Transfer Protocol (ControlTransfer), Isochronous Transfer Protocol (IsochronousTransfer), Interrupt Transfer Protocol and Bulk Transfer Protocol (BulkTransfer) because the Bulk transfer protocol can guarantee the correctness of data transfer, and because of the large data block As a data unit, it can provide high transmission efficiency, so it is widely used...

AI Technical Summary

Problems solved by technology

[0003] At present, all mainstream operating systems support USB mass storage devices, including Windows, Unix, Linux and MacOS used on PCs, and Android and IOS used on mobile devices, among which the mobile operating system IOS developed by Apple uses USBBulk The protocol carries out the transmission of basic data blocks, but logically it is a data stream transmission mode. No matter whether it is a command, data or status information, the packet format is not distinguished, and all are transmitted in the form of a serial data stream. Transmission characteristics often lead to data overflow and loss, making data transmission impossible to complete normally. Therefore, how to solve the problem of data flow overflow and loss based on the efficient USBBulk transmission protocol has become a technical problem that attracts attention.

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