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Unibus communication method and system

A communication method and single bus technology, applied in the field of communication, can solve the problem of inaccurate signals received at the receiving end, and achieve the effect of simple distinguishing method, strong operability, and guaranteeing accuracy

Inactive Publication Date: 2020-04-28
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a single-bus communication method and system, which uses the pulse duty ratio or pulse frequency to characterize the data frame, which solves the problem of continuous identical When the level is low, the receiving end receives the technical problem that the signal is inaccurate

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Experimental program
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Effect test

Embodiment 1

[0046] The invention provides a single bus communication method. The flow chart of this single bus communication method is shown in figure 1 .

[0047] The first communication device sends a data frame to the second communication device, and the data frame is represented by a pulse duty cycle or a pulse frequency;

[0048] The second communication device feeds back to the first communication device whether the data frame needs to be resent.

[0049] Firstly, the single-bus communication method of the present invention will be described by using a single-bus to connect two communication devices as an example.

[0050] Mark the two communication devices as A and B respectively. The I / O interfaces of A and B are connected through a single bus. The single bus is connected to the power supply through a pull-up resistor, and the single bus is pulled up to a high level by the pull-up resistor. Its structural diagram is shown in figure 2 .

[0051] First, set the data frame: set...

Embodiment 2

[0061] The single-bus communication method of this embodiment can also be used in the case of using a single bus to connect multiple communication devices.

[0062] Mark multiple communication devices as A, B...Z, the I / O interface of each communication device is connected through a single bus, the single bus is connected to the power supply through a pull-up resistor, and the single bus is pulled up to a high level by the pull-up resistor . Its structural diagram is shown in Figure 4 .

[0063] First, set the data frame: set the pulse duty cycle of the start bit to 90%, the high level means the pulse duty cycle of the value "1" is 60%-80%, and the low level means the value "0" The pulse duty cycle of "is 20%-40%, and the pulse duty cycle of the stop bit is 10%. Of course, the setting of the data frame is not limited to this, and the pulse duty cycle of the start bit can also be set to 10%, and the high level, that is, the pulse duty cycle of the value "1" is 60%-80%. The...

Embodiment 3

[0075] In this embodiment, the data frame is represented by the pulse frequency.

[0076] When characterizing the pulse frequency, in this embodiment, 2 pulse periods are used to represent the low level, and 3 pulse periods are used to represent the high level. Its diagram see Figure 5 . The relationship between pulse period T and pulse frequency f is: f=1 / T. It is also possible to use 2 pulse periods to represent the high level, and 3 pulse periods to represent the low level, as long as the pulse periods of the high and low levels are different. Using this method is convenient for the receiving end to distinguish between high and low levels. In this embodiment, when the pulse frequency is used to characterize the data frame, the start bit and the stop bit are not needed, and the start bit specified by the protocol can be used: such as 0xaa or others, and the stop bit can use carriage return and line feed.

[0077] When two communication devices communicate using a single ...

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Abstract

The invention discloses a unibus communication method and system. The unibus communication method comprises: first communication equipment sending a data frame to second communication equipment; wherein the data frame is characterized by a pulse duty ratio or a pulse frequency. According to the invention, a pulse duty ratio or a pulse frequency is used to characterize a data frame. The rising edgeor the falling edge of the pulse duty ratio is used for distinguishing continuous levels or different pulse frequencies are used for distinguishing the continuous levels, so that the situation that the receiving end difficultly distinguishes how many continuous levels exist when the continuous levels occur is avoided, and the signal receiving accuracy of the receiving end is ensured.

Description

technical field [0001] The present application relates to a single-bus communication method and system, belonging to the technical field of communication. Background technique [0002] Bus technology is an important technology for communication between chips or devices. Compared with point-to-point communication technology, bus communication can effectively reduce the complexity of the connection and improve the utilization rate of the connection. The existing bus can be divided into serial bus and parallel bus according to the way of data transmission. At present, the common serial bus includes SPI, I2C, USB, IEEE1394, RS232, CAN, etc., while the parallel bus has relatively few types. Common ones such as IEEE1284, ISA, PCI, etc. However, whether it is a serial bus or a parallel bus, bus communication requires the support of multiple communication lines, which will bring difficulties to the circuit design where I / O port resources are very precious, so single-bus communicati...

Claims

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Application Information

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IPC IPC(8): H04L12/40H04L1/00H04L1/16
CPCH04L1/0002H04L1/0061H04L1/16H04L12/40
Inventor 冯新凯陈怀熹李广伟张新彬古克义梁万国黄玉宝
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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