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Single bus two-way communication protocol revolving analyzer

A protocol analysis and two-way communication technology, which is applied in the field of single-bus two-way protocol analyzers, can solve problems such as inability to obtain data accurately, and inability to determine whether the waveform comes from the master device or the slave device.

Inactive Publication Date: 2006-08-23
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For electronic instrument systems using single-bus communication, during testing and maintenance, only an oscilloscope can be used to observe the waveform on the single-bus. It is impossible to determine whether the waveform is from the master device or the slave device, and it is impossible to accurately obtain the communication data transmitted on the single-bus.

Method used

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  • Single bus two-way communication protocol revolving analyzer
  • Single bus two-way communication protocol revolving analyzer
  • Single bus two-way communication protocol revolving analyzer

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Embodiment Construction

[0010] The specific structure and embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0011] figure 1 Among them, the single-bus signal splitter 1 is connected to the microprocessor system 2, the microprocessor system 2 is connected to the interface circuit 3, and the interface circuit 3 is connected to the computer system 4. Finally, connect them to the two terminals after the single-bus split.

[0012] figure 2 Among them, the base of the transistor Q1 is connected to the node B, one end of the resistor R2, and the emitter of Q2 respectively. The collector of the transistor Q1 is connected to the node slave and one end of the resistor R1 respectively. The emitter of the transistor Q1 is respectively connected to the node A, the base of Q2, and one end of the resistor R3. The collector of the transistor Q2 is respectively connected to the node master and one end of the resistor R4. The other ends of R1, ...

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Abstract

This invention relates to an analyzer of a single bus and double-way communication protocol, especially to one of 1-wire protocol, which is composed of a single-bus signal analyzer, a microprocessor system and an interface circuit. Originally, one connecting end of a single bus is connected with a port of the analyzer and the other is connected with the other, the analyzer can maintain the normal work of the single bus, the two-path signals analyzed by the analyzer are connected to two lead pins of the microprocessor to get the pulse width of the level of the two waveforms and get the concrete waveforms of single bus communication and sends the analyzed result to the computer via interface circuit.

Description

technical field [0001] The invention relates to a decomposition analyzer of a single bus bidirectional communication protocol, in particular to a single bus bidirectional protocol analyzer of a 1-wire protocol. Background technique [0002] The single bus only uses one signal line to complete the two-way communication of data, which is different from other standard serial data communication methods such as SPI, I 2 C, MICROWIRE, etc. are very different. This signal line transmits both clock and data, and the transmission is bidirectional. It has the advantages of saving microprocessor I / O resources, simple structure, and easy expansion. It is widely used and is suitable for single-host systems. It is used to control one or Multiple slave devices. Usually, the host or slave is connected to the data line through an open-drain or tri-state port. This connection allows the device to release the single bus when not sending data for use by other devices; at this time, an externa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/42
Inventor 吴允平苏伟达蔡声镇吴进营
Owner FUJIAN NORMAL UNIV
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