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Baud rate self-adaptation signal receiving method

A signal reception and baud rate technology, applied in the field of communication, can solve problems such as poor convenience and timeliness

Inactive Publication Date: 2015-06-17
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the three methods are different, they all perform handshaking through different data frames before each data transmission, confirm the baud rate of the sender, and then receive the data correctly, so the convenience and timeliness of use are poor

Method used

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Embodiment

[0050] This embodiment discloses a signal receiving method for adaptive baud rate, such as figure 1 As shown, the specific steps are as follows:

[0051] S1. According to the fixed receiving baud rate of the receiver, in the case of various sending baud rates of the sender, when the sender sends high level / low level of various bits, the corresponding high level / low level collected by the receiver The number of flat pulses sets up a table, and by this table, judge the minimum value in the possible values ​​of the baud rate corresponding to the sender according to the position of the lowest bit 1 in the binary number of the number of pulses; in the present embodiment, the sender The sending baud rate satisfies the following relationship: the sending baud rate of the sender is a / 2 n baud, n=0,1,2,...,n max , if the sending baud rate of the sender is most of the baud rates in the RS-232-C standard, where a is 75, n max =8, the sending baud rate includes 75 baud, 150 baud, 300 b...

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PUM

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Abstract

The invention discloses a baud rate self-adaptation signal receiving method. The baud rate self-adaptation signal receiving method comprises the steps that (S1) a relation table of the number of pulses obtained through all sections of high / low level signals received by a receiver and the sending baud rates of a sender is established; (S2) the sender sends data; (S3) the receiver receives signals, the number of the pulses of high / low levels in each duration time section is obtained, and meanwhile the received data frame length is counted; (S4) approximate processing is conducted on the number of the pulses, the minimum values of probable values of the sending baud rates of the sender are obtained by checking the table, all the minimum values are compared, and the maximum value serves as the temporary sending baud rate; (S5) the total length of the data frames received by the receiver is determined according to the sending baud rates and the data frame format of the sender; (S6) whether the length of the received data frames reaches the total length or not is judged, if yes, receiving is completed, the maximum value obtained in the step (S4) serves as the sending baud rate, all the numbers of pulses previously obtained are calculated, data frames of the sender are obtained, and otherwise, the step (S3) is conducted again.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a signal receiving method in serial data communication, in particular to a signal receiving method with an adaptive baud rate. Background technique [0002] Serial communication is widely used in fields requiring long-distance communication such as industry, medical treatment, people's livelihood, and aerospace. The correct matching of the baud rate of each node on the serial bus is the prerequisite for normal communication of the system. Under normal circumstances, due to the existence of inductive reactance, when the transmission distance is different, the highest baud rate that can be used for transmission is also different. As the transmission distance increases, the baud rate that can be used will continue to decrease. Moreover, for different slave devices, due to the different clock frequencies used, the transmission baud rates will also be different. In practical app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/42
Inventor 易清明李森源石敏
Owner JINAN UNIVERSITY