System and method for realizing I2C bus control

Abstract

The invention discloses a system for realizing I2C bus control. In the system, a complex programmable logic device (CPLD) is used for dividing SCL signals acquired from an Inter-integrated circuit (I2C) bus of master equipment into a plurality of paths and expanding the divided signals to the I2C bus of slave equipment, and between SDA signals acquired from the I2C buses of the master equipment and the slave equipment, judging a current data state and determining the direction of current SDA signals. The invention also discloses a method for realizing the I2C bus control, which comprises the following steps: dividing the SCL signals acquired from the Inter-integrated circuit (I2C) bus of the master equipment into the plurality of paths, and expanding the divided signals to the I2C bus of the slave equipment; and between the SDA signals of the I2C buses of the master equipment and the slave equipment, judging the current data state and determining the direction of the current SDA signals. The method and the system of the invention can reduce cost and the design complexity of a single board.

Description

technical field [0001] The invention relates to an Intel integrated circuit (I2C, Inter-Integrated Circuit) bus technology, in particular to a system and method for realizing I2C bus control by using a complex programmable logic device (CPLD). Background technique [0002] The I2C bus is a two-wire serial bus developed by PHILIPS for connecting microcontrollers and their peripherals. The I2C bus originated in the 80s, originally developed for audio and video equipment, and today is mainly used in server management, including the communication of the status of individual components. For example, administrators can query various components to manage system configuration or grasp the functional status of components, such as power supplies and system fans. It can monitor memory, hard disk, network, system temperature and other parameters at any time, which increases the security of the system and facilitates management. [0003] In existing Ethernet switches, routers and other...

AI Technical Summary

Problems solved by technology

These devices will be distributed throughout the system. When managed in a unified manner, due to reasons such as too long wiring and too many devices, the signal quality may be too poor, resulting in abnormal device access.

[0004] Some existing special I2C bus driver chips, such as buffer (buffer) or hub (hub) etc. can solve this problem to I2C bus control, but, because I2C bus driver chip is a kind of hardware implementation, therefore, adopt this The I2C bus driver chip will increase the manufacturing cost; and on some high-density single boards, there is no additional space to place these I2C bus driver chips. If these I2C bus driver chips are placed rigidly, it will increase the design complexity of the board. Spend

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