SPI (serial peripheral interface) bus driving method and system and electronic equipment

Abstract

The invention provides an SPI (serial peripheral interface) bus driving method and system and electronic equipment. The SPI bus driving system is applied to communication through an SPI bus, is a communication network comprising a master communication device and at least one slave communication device and comprises a first conversion module and a second conversion module, wherein the first conversion module is used for converting TTL (transistor-transistor logic) level signals output by the master / slave communication device through the SPI bus into differential signals for long-distance transmission; the second conversion module is used for inversely conversing the differential signals into the TTL level signals and transmitting the recovered TTL signals to the master / slave communication device. The SPI bus driving system has the advantages that the signal output driving capacity and anti-interference of the SPI bus are improved while the workload of a central processing unit is not increased, and the data transmission distance is lengthened.

Description

technical field [0001] The invention belongs to the technical field of communications, and relates to a driving method and system, in particular to a driving method, system and electronic equipment of an SPI bus. Background technique [0002] SPI is the abbreviation of Serial Peripheral Interface (SerialPeripheralInterface). SPI is a high-speed, full-duplex, synchronous communication bus. The SPI bus is widely used in electronic devices due to its low cost and simplicity of use. Since the SPI bus adopts TTL level, the driving ability and anti-interference ability are poor, and the transmission distance is very limited, so it is mainly used for internal communication of electronic equipment, and is not suitable for communication between electronic equipment. However, in recent years, more and more sensors have adopted the SPI bus for inter-device communication with electronic devices. [0003] However, in the prior art, the use of the SPI bus can only communicate within th...

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned shortcoming of prior art, the object of the present invention is to provide a kind of drive method of SPI bus, system and electronic equipment, be used to solve the problem that using SPI bus can only communicate inside electronic equipment in the prior art, does not use electronic equipment. The communication between devices results in limited communication distance, and the signal drive ability of the SPI bus output is poor, and the anti-interference ability is low.

Images