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High level protocol control method for peripheral equipment interface

A high-level protocol and control method technology, applied in the direction of instrumentation, electrical digital data processing, etc., can solve problems such as not supporting full-duplex transmission, and achieve high data processing efficiency, improved efficiency, and good versatility

Inactive Publication Date: 2008-06-25
VIMICRO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this high-level protocol is that it does not support full-duplex transmission

Method used

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  • High level protocol control method for peripheral equipment interface
  • High level protocol control method for peripheral equipment interface
  • High level protocol control method for peripheral equipment interface

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Experimental program
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Embodiment Construction

[0028] In order to explain the technical solution of the present invention more clearly, firstly, the high-level protocol frame structure and the structural principle of the serial communication bus external device interface involved in the present invention will be given in detail.

[0029] The high-level protocol is a master-slave full-duplex or half-duplex communication protocol, all transmissions are initiated by the host, and the host can send and receive data at the same time. Supports SPI interrupt transmission, and does not require SSN to remain low during the entire frame transmission process. The length of the frame header is variable, and a short frame header is used when transmitting a small amount of data to improve transmission efficiency.

[0030] A high-level protocol frame consists of two parts, the frame header and the payload, such as figure 1 shown. Because it carries variable data volume services, in order to improve transmission efficiency, a variable-l...

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Abstract

The high-level protocol control process for peripheral equipment interface includes the following steps: receiving the high-level protocol frame data comprising frame head and payload; processing the frame head to slave equipment port address, payload length and current sub-frame head attribute parameter value based on the frame head data, so as to output slave equipment port address as the read address or write address, obtain total frame length data, read frame length data and write frame length data; and final processing payload to read / write payload and complete the data communication between the master equipment and the slave equipment in full duplex or half duplex mode. The present invention can meet the requirement of full duplex / half duplex communication, physical addressing, etc. of data transmission in different kinds of equipment, and has continuous read function, high data reading efficiency, simple process, and other features.

Description

technical field [0001] The invention relates to a high-layer protocol control method of peripheral equipment interface used for serial communication bus external equipment interface. technical background [0002] Serial communication is a very important data communication method between the master device and the external device. Fewer data lines are required compared to a parallel communication bus. Serial Peripheral Interface (Serial Peripheral Interface, SPI) is a synchronous serial bus proposed by Motorola, which is used for data exchange between the master device and the peripheral device. The SPI bus is a master-slave communication mechanism, the host is the master, and the peripheral is the slave. The SPI bus consists of 4 buses, namely the serial clock line (SCK), the master device input / slave device output data line (MISO), the master device output / slave device input data line (MOSI) and the slave device effective selection line ( SSN). The SPI interface is a sim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/42
Inventor 王军金传恩董欣
Owner VIMICRO CORP
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