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Data transmission method and I2C (Inter-Integrated Circuit) interface extender

A data transmission method and interface expansion technology, which is applied in the field of data transmission methods and I2C interface expanders, can solve problems such as I2C communication conflicts, and achieve the effect of avoiding communication conflicts

Inactive Publication Date: 2013-12-25
GUANGDONG VTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the prior art, the control module accesses the I2C device through the I2C device address. If multiple I2C device addresses are the same in one system, it will cause I2C communication conflicts in the system.

Method used

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Embodiment Construction

[0013] Embodiments of the present invention provide a data transmission method and an I2C interface expander, which can avoid communication conflicts when I2C device addresses are the same.

[0014] Please refer to figure 1 , an embodiment of the data transmission method in the embodiment of the present invention includes:

[0015] 101. The controller sends a first control signal to a switch connected to the controller;

[0016] In this embodiment, the first control signal is used to control the on-off of the switch.

[0017] 102. When the switch is turned on, the controller sends a second control signal to the I2C interface connected to the switch through the switch;

[0018] In this embodiment, when the switch is turned on, the controller can send a second control signal to the I2C interface through the turned on switch, wherein the second control signal is used to control the I2C device connected to the I2C interface, and the I2C device specifically The function is not l...

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PUM

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Abstract

The embodiment of the invention discloses a data transmission method and an I2C (Inter-Integrated Circuit) interface extender. The data transmission method provided by the embodiment of the invention comprises the steps that (1) a controller sends a first control signal to a switch connected with the controller, wherein the first control signal is used for controlling the connection / disconnection of the switch; (2) when the switch is connected, the controller sends a second control signal to I2C interfaces connected with the switch through the switch, wherein the second control signal is used for controlling I2C components connected with the I2C interfaces; (3) the I2C interfaces enable the second control signal to be transmitted to the I2C components, thereby realizing that the controller can send the second control signal to the I2C components together with the I2C interfaces connected with the switch when the switch is connected; therefore, communication conflict occurring in the situation of the same I2C component addresses is prevented.

Description

technical field [0001] The invention relates to the communication field, in particular to a data transmission method and an I2C interface expander. Background technique [0002] In order to improve the compatibility and scalability of the system, the embedded system with I2C (Inter-Integrated Circuit) bus extends the I2C bus, and the control module and I2C devices are connected through external cables, and can be connected through different The I2C devices implement a variety of different functions. [0003] However, in the prior art, the control module accesses the I2C device through the address of the I2C device. If multiple I2C devices have the same address in one system, it will cause I2C communication conflicts in the system. Contents of the invention [0004] The invention provides a data transmission method and an I2C interface expander, which can avoid communication conflicts when the addresses of I2C devices are the same. [0005] The data transmission method pr...

Claims

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Application Information

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IPC IPC(8): G06F13/40G06F13/376
Inventor 贺文健
Owner GUANGDONG VTRON TECH CO LTD