CN115033518A - USB protocol data communication method based on OTG controller - Google Patents
USB protocol data communication method based on OTG controller Download PDFInfo
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- CN115033518A CN115033518A CN202210733712.9A CN202210733712A CN115033518A CN 115033518 A CN115033518 A CN 115033518A CN 202210733712 A CN202210733712 A CN 202210733712A CN 115033518 A CN115033518 A CN 115033518A
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- usb
- slave
- loongson
- descriptor
- host
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0042—Universal serial bus [USB]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Information Transfer Systems (AREA)
Abstract
The invention discloses a USB data communication scheme based on a Loongson OTG controller, which comprises the following steps: step 1: constructing equipment conforming to the USB protocol based on an OTG controller interface of a SLAVE computer of the SLAVE Loongson, and constructing a USB equipment descriptor, a USB configuration descriptor, a USB interface descriptor and a USB endpoint descriptor conforming to the USB protocol by software; step 2: connecting the SLAVE of SLAVE Loongson with HOST X86 or the USB controller interface of the Loongson HOST through a USB data line; and step 3: HOST (X86/Loongson) completes bidirectional USB protocol communication by reading and writing its USB controller interface and SLAVE (Loove) by reading and writing its OTG controller interface. When the Loongson platform is used as a SLAVE, the Loongson platform can perform bidirectional data communication based on the USB protocol with the HOST HOST.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a scheme for data communication based on a USB protocol of a Loongson OTG controller.
Background
At present, USB protocol-based bidirectional communication between SLAVE and HOST based on Loongson is very important, and the technical scheme of using OTG controller interface of Loongson is very few. How to adopt a Loongson LS2K1000 chip on hardware and adopt LINUX operating system kernel and drive on a Loongson LS2K1000 platform on software is a problem which needs to be solved urgently at present.
Disclosure of Invention
The invention aims to solve the problem of bidirectional data communication based on a USB protocol with a HOST HOST when a Loongson is used as a SLAVE.
The technical scheme adopted by the invention for solving the technical problems is as follows: a USB protocol data communication method based on an OTG controller comprises the following steps:
step 1: the method comprises the steps that equipment conforming to the USB protocol is constructed on the basis of an OTG controller interface of a SLAVE Loongson SLAVE machine, and USB equipment descriptors, USB configuration descriptors, USB interface descriptors and USB endpoint descriptors conforming to the USB protocol are constructed by software, so that corresponding functions of the equipment can be enabled.
Step 2: connecting the SLAVE of SLAVE Loongson with HOST X86 or the USB controller interface of the Loongson HOST through a USB data line;
and step 3: HOST (X86/Loongson) completes bidirectional USB protocol communication by reading and writing its USB controller interface and SLAVE (Loove) by reading and writing its OTG controller interface.
Further, in step 1 of the present invention, the SLAVE godson-based OTG controller is configured to conform to the USB protocol standard device by software, and the specific method is that the software constructs a USB device descriptor, a USB configuration descriptor, a USB interface descriptor, and a USB endpoint descriptor conforming to the USB protocol, so as to enable corresponding functions thereof.
Further, in step 3 of the present invention, the HOST (X86/Loongson) completes bidirectional USB protocol communication by reading and writing its USB controller interface and SLAVE (Loove) and reading and writing its OTG controller interface.
Further, the configuration of the software construction process is completed by a LINUX operating system and a driver.
Has the beneficial effects that:
when the Loongson platform is used as a SLAVE, the Loongson platform can perform bidirectional data communication based on the USB protocol with the HOST HOST.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is described in detail below with reference to the accompanying drawings and embodiments. It should be noted that the specific embodiments described herein are only for explaining the present invention and are not used to limit the present invention.
As shown in fig. 1, the present invention provides a USB protocol data communication method based on an OTG controller, which uses a Loongson LS2K1000 chip on hardware; and a LINUX operating system kernel and a drive are adopted on a software upper Loongson LS2K1000 platform. The method specifically comprises the following steps:
step 1: the method comprises the steps that equipment conforming to the USB protocol is constructed on the basis of an OTG controller interface of a SLAVE Loongson SLAVE machine, and USB equipment descriptors, USB configuration descriptors, USB interface descriptors and USB endpoint descriptors conforming to the USB protocol are constructed by software, so that corresponding functions of the equipment can be enabled.
And 2, step: connecting the SLAVE with HOST X86 or the USB controller interface of the Loongson master HOST through a USB data line;
and 3, step 3: HOST (X86/Loongson) completes bidirectional USB protocol communication by reading and writing its USB controller interface and SLAVE (Loove) by reading and writing its OTG controller interface.
In the step 1 of the present invention, the SLAVE godson based SLAVE OTG controller is configured to comply with the USB protocol standard device by software, and the specific method is that the software constructs a USB device descriptor, a USB configuration descriptor, a USB interface descriptor, and a USB endpoint descriptor according to the USB protocol, so as to enable the corresponding functions.
In the step 3 of the present invention, the HOST (X86/Loongson) completes the bidirectional USB protocol communication by reading and writing the USB controller interface and SLAVE (Loove) interface and reading and writing the OTG controller interface.
The software construction process of the invention is completed by the LINUX operating system and the driver.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited thereto, and that various changes and modifications may be made without departing from the spirit of the invention, and the scope of the invention is defined in the appended claims.
Claims (3)
1. An OTG controller-based USB protocol data communication method is characterized by comprising the following steps:
step 1: constructing equipment conforming to a USB protocol based on an OTG controller interface of a SLAVE Loongson SLAVE machine, and constructing a USB equipment descriptor, a USB configuration descriptor, a USB interface descriptor and a USB endpoint descriptor conforming to the USB protocol by software;
step 2: connecting the SLAVE with HOST X86 or the USB controller interface of the Loongson master HOST through a USB data line;
and step 3: HOST (X86/Loongson) completes bidirectional USB protocol communication by reading and writing its USB controller interface and SLAVE (Loove) by reading and writing its OTG controller interface.
2. The method according to claim 1, wherein the method comprises: in the step 1, the SLAVE Loose-based OTG controller is configured into the USB protocol standard equipment by software, and the software constructs a USB equipment descriptor, a USB configuration descriptor, a USB interface descriptor and a USB endpoint descriptor which accord with the USB protocol.
3. The method according to claim 1, wherein the method comprises: in the step S3, the HOST (X86/Loongson) completes bidirectional USB protocol communication by reading and writing its USB controller interface and SLAVE (Loove) and reading and writing its OTG controller interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210733712.9A CN115033518A (en) | 2022-06-27 | 2022-06-27 | USB protocol data communication method based on OTG controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210733712.9A CN115033518A (en) | 2022-06-27 | 2022-06-27 | USB protocol data communication method based on OTG controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115033518A true CN115033518A (en) | 2022-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210733712.9A Pending CN115033518A (en) | 2022-06-27 | 2022-06-27 | USB protocol data communication method based on OTG controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115033518A (en) |
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2022
- 2022-06-27 CN CN202210733712.9A patent/CN115033518A/en active Pending
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