IIC communication method and embedded system for implementing IIC communication

A technology of embedded systems and communication methods, applied in the field of embedded systems, can solve problems such as low communication speed and inability to synchronize, and achieve the effect of reducing the number and complexity of wiring

Active Publication Date: 2014-12-10
GOERTEK INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the logical relationship of multiple IIC chips is equal, the priority is the same, there is no sequence relationship, and some even require simultaneous communication. Under the traditional IIC communication mechanism, if multiple devices are connected in parallel to the two buses, Only after the single-channel communication is completed, switch to the next channel, cannot be synchronized, there is a time difference, and the overall communication speed is low

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  • IIC communication method and embedded system for implementing IIC communication
  • IIC communication method and embedded system for implementing IIC communication
  • IIC communication method and embedded system for implementing IIC communication

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Embodiment Construction

[0029] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0030] figure 2 It is a structural schematic diagram of an embedded system for implementing multi-channel IIC synchronous communication according to an embodiment of the present invention. like figure 2 As shown, the embedded system includes a host, a single SCL line, 3 SDA lines, and 3 IIC devices (also known as slaves). The three IIC devices include device 1 labeled 12 , device 2 labeled 14 and device 3 labeled 16 . A single SCL line is connected to each of Device 1, Device 2, and Device 3, ie, the SCL line can be multiplexed. Among the three SDA lines, the SDA1 line is connected to the device 1, the SDA2 line is connected to the device 2, and the SDA3 line is connected to the device 3.

[0031] The host 20 operates the device 1 , device 2 and device 3 through the SDA1 , SDA2 and SDA3 lines and the single SCL line. When the host 20 provides ...

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Abstract

The invention provides an embedded system for implementing IIC communication. The embedded system comprises a host, multiple IIC devices, multiple SDA lines and a single SCL line. Each of the IIC devices is connected with one of the multiple SDA lines. Each of the IIC devices is connected with the single SCL line. The host operates the IIC devices through the multiple SDA lines and the single SCL line. When the single SCL line provides SCL sequence signals to the multiple IIC devices, the host sends data signals to the corresponding IIC devices through the SDA lines according to the SCL sequence signals and address information of the IIC devices. The invention further provides an IIC communication method. Multi-channel IIC synchronous communication can be achieved while quantity of I / O (input / output) lines can be reduced.

Description

technical field [0001] The present invention relates to the technical field of computer communication, more specifically, to an IIC communication method and an embedded system for realizing IIC communication. Background technique [0002] The communication of the IIC chip is not only connected to the power supply and the ground wire, but also consists of two wires, the clock signal line SCL and the data line SDA. The IIC protocol stipulates that if devices have different addresses, they can be directly connected to the two buses in parallel. [0003] In the current embedded system design, there are many types of IIC devices with powerful functions, and sometimes multiple IIC chips of the same type are used at the same time. Since the logical relationship of multiple IIC chips is equal, the priority is the same, there is no sequence relationship, and some even require simultaneous communication. Under the traditional IIC communication mechanism, if multiple devices are conne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/38
Inventor 王维奎陈军生
Owner GOERTEK INC
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