CN115242351A - Serial data communication rate self-adaption method - Google Patents
Serial data communication rate self-adaption method Download PDFInfo
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- CN115242351A CN115242351A CN202210820415.8A CN202210820415A CN115242351A CN 115242351 A CN115242351 A CN 115242351A CN 202210820415 A CN202210820415 A CN 202210820415A CN 115242351 A CN115242351 A CN 115242351A
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- 238000000034 method Methods 0.000 title claims abstract description 18
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0033—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
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Abstract
The invention provides a serial data communication rate self-adapting method, which comprises that a transmitting terminal: according to the set symbol period of the transmitting end, the transmitting end transmits a specific start bit symbol, and the pulse period of the receiving end receiving the specific start bit symbol pulse is positioned at the set proportion of the symbol period; further setting a specific end bit; receiving end: the receiving end receives the specific start bit symbol and obtains the symbol period of the transmitting end according to the pulse period of the specific start bit symbol and the set proportion of the symbol period; obtaining serial data according to the symbol period to realize the communication rate self-adaption of the serial data; both communication parties send and receive according to the specific start bit and stop bit, the communication rate and the data length do not need to be confirmed in advance, the self-adaption of the serial data communication rate can be realized, the parameter setting during serial data communication is reduced, and the communication errors caused by inconsistent communication parameter setting are also reduced.
Description
Technical Field
The invention relates to the field of serial asynchronous communication, in particular to a serial data communication rate self-adaption method.
Background
Serial asynchronous communication is the most common data information transmission mode in computer communication; it is transmitted in units of character bits, with no fixed time interval between characters, and the bits in each character are transmitted at fixed times.
In the prior art, a method for synchronization of both receiving and transmitting parties of serial asynchronous communication is to set a start bit and a stop bit in a character format, before a valid character is formally transmitted, a transmitter firstly transmits a start bit, then transmits a valid character bit, and then transmits a stop bit when the character is finished, wherein the start bit and the stop bit form a frame. Wherein, the start bit is a logic '0' level lasting for one bit time, and the stop bit is a logic '1' level of 1 bit, 1.5 bits or 2 bits, and is only used as the identification of the start bit and the stop bit. The parameters, including communication rate, data length, etc., must be preset and must be consistent for the sender and the receiver of serial asynchronous communication, otherwise, errors and confusion of data transmission will be caused by inconsistency agreed between the sender and the receiver.
Disclosure of Invention
The main purpose of the present invention is to overcome the above-mentioned defects in the prior art, and to provide a serial data communication rate adaptive method, in which both communication parties transmit and receive according to specific start bits and stop bits, and the communication rate and data length do not need to be confirmed in advance, so that the serial data communication rate adaptive method can be implemented, parameter setting during serial data communication is reduced, and communication errors caused by inconsistent communication parameter settings are also reduced.
The invention adopts the following technical scheme:
a serial data communication rate adaptation method, comprising:
a transmitting end:
according to the set symbol period of the transmitting end, the transmitting end transmits a specific start bit symbol, and the pulse period of the receiving end receiving the specific start bit symbol pulse is positioned at the set proportion of the symbol period;
the transmitting terminal transmits serial data according to a symbol period;
the transmitting end transmits a specific stop bit symbol, and the pulse period of the receiving end receiving the specific stop bit symbol pulse is positioned at the tail end of the symbol period, so that the transmission of the serial data of the frame is finished;
receiving end:
the receiving end receives the specific start bit symbol and obtains the symbol period of the transmitting end according to the pulse period of the specific start bit symbol and the set proportion in the symbol period;
obtaining serial data according to the symbol period to realize the communication rate self-adaption of the serial data;
the receiving end receives the specific stop sign bit and finishes the receiving of the frame serial data.
Specifically, according to a set symbol period of the transmitting end, the transmitting end sends a specific start bit symbol, and a pulse period of the receiving end receiving the specific start bit symbol is located at a set proportion of the symbol period, specifically:
the specific start bit symbol pulse is at high level, and the specific start bit symbol is at low level, high level and low level; the pulse period of a particular start bit symbol is located in one of the 2 nd and third symbol periods.
Specifically, the sending end sends a specific stop bit symbol, and the pulse period in which the receiving end receives the specific stop bit symbol is located at the end of the symbol period, and ends the sending of the serial data this time, specifically:
the specific stop bit symbol pulse is at high level, and the specific stop bit symbol is at low level, low level and high level; the pulse period of a particular stop bit symbol is located in one of the 3 rd three symbol periods.
Specifically, the serial data symbol periods are different for different frames.
As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages:
(1) A serial data communication rate adaptation method, comprising, at a transmitting end: according to the set symbol period of the transmitting end, the transmitting end transmits a specific start bit symbol, and the pulse period of the receiving end receiving the specific start bit symbol pulse is positioned at the set proportion of the symbol period; the transmitting terminal transmits serial data according to the symbol period; the transmitting end transmits a specific stop bit symbol, and the pulse period of the receiving end receiving the specific stop bit symbol pulse is positioned at the tail end of the symbol period, so that the transmission of the serial data of the frame is finished; receiving end: the receiving end receives the specific start bit symbol and obtains the symbol period of the transmitting end according to the pulse period of the specific start bit symbol and the set proportion of the symbol period; obtaining serial data according to the symbol period to realize the communication rate self-adaption of the serial data; the receiving end receives the specific stop sign bit and finishes the receiving of the serial data of the frame; both communication parties of the invention send and receive according to the specific start bit and stop bit, without confirming the communication rate and data length in advance, the invention can realize the self-adaption of the serial data communication rate, reduce the parameter setting during the serial data communication and also reduce the communication errors caused by the inconsistency of the communication parameter setting.
(2) According to the serial data communication rate self-adaption method provided by the invention, serial data of different frames can set different symbol periods, and the safety of data transmission can be improved.
Drawings
FIG. 1 is a schematic diagram of a start bit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of serial data transmission according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a stop bit according to an embodiment of the present invention.
The invention is described in further detail below with reference to the figures and specific examples.
Detailed Description
The invention provides a serial data communication rate self-adapting method, both communication parties send and receive according to specific start bits and stop bits, the communication rate and the data length do not need to be confirmed in advance, the serial data communication rate self-adapting can be realized, the parameter setting during serial data communication is reduced, and the communication errors caused by inconsistent communication parameter setting are also reduced.
A serial data communication rate adaptation method, comprising:
a transmitting end:
s11: according to the set symbol period of the transmitting end, the transmitting end transmits a specific start bit symbol, and the pulse period of the receiving end receiving the specific start bit symbol pulse is positioned at the set proportion of the symbol period;
the pulse period of the symbol pulse of the specific start bit received by the receiving end is located at a set proportion of the symbol period, and the set proportion can be one half, one third, two thirds, one quarter, three quarters and the like;
in a specific embodiment, according to a set symbol period of the transmitting end, the transmitting end sends a specific start bit symbol, and a pulse period of the specific start bit symbol received by the receiving end is located at a set proportion of the symbol period, specifically, as shown in fig. 1;
the specific start bit symbol pulse is at high level, and the specific start bit symbol is at low level, high level and low level; the pulse period of a particular start bit symbol is located in one of the 2 nd and third symbol periods.
The embodiment of the invention sets specific start bit symbols of low level, high level and low level; and the pulse period of a particular start bit symbol is located in one of the 2 nd and third symbol periods, such an arrangement facilitates identification of the start bit symbol.
S12: the transmitting terminal transmits serial data according to a symbol period; FIG. 2 is a schematic diagram of serial data transmission according to an embodiment of the present invention;
s13: the transmitting end transmits a specific stop bit symbol, and the pulse period of the receiving end receiving the specific stop bit symbol pulse is positioned at the tail end of the set proportion of the symbol period, so that the transmission of the frame serial data is finished;
the pulse period of the specific stop sign pulse received by the receiving end is located at the end of the set proportion of the sign period, the set proportion can also be one half, one third, two thirds, one fourth, three fourths, and the like, and the end located at the set proportion is the second half, the third, and the fourth quarter.
Specifically, the transmitting end sends a specific stop bit symbol, and makes the pulse period, in which the receiving end receives the specific stop bit symbol, located at the end of the symbol period, and ends the sending of the serial data this time, specifically, as shown in fig. 3:
the specific stop bit symbol pulse is high level, and the specific stop bit symbol is low level, low level and high level; the pulse period of a particular stop bit symbol is located in one of the 3 rd three symbol periods.
Receiving end:
s21: the receiving end receives the specific start bit symbol and obtains the symbol period of the transmitting end according to the pulse period of the specific start bit symbol and the set proportion of the symbol period;
in a specific embodiment, the embodiment of the invention sets specific start bit symbols of low level, high level and low level; and the pulse period of the specific start bit symbol is located in the 2 nd one-third symbol period, namely the pulse period is one third of the symbol period, the symbol mark determines the start position, and the symbol period is calculated according to the fact that the pulse period is one third of the symbol period.
S22: obtaining serial data according to the symbol period to realize the communication rate self-adaption of the serial data;
when the receiving end receives effective data, the data is acquired according to the calculated symbol period, so that the communication rate self-adaptation of serial data is realized, the communication rate and the data length do not need to be confirmed in advance, the parameter setting during serial data communication is reduced, and communication errors caused by inconsistent communication parameter setting are also reduced.
S23: the receiving end receives the specific stop sign bit and finishes the receiving of the serial data of the frame.
The receiving end receives the symbols of low level, low level and high level, namely the set specific stop bit, and the receiving end locates in one of the 3 rd symbol period according to the pulse period of the specific stop bit symbol to end the receiving of the frame serial data.
In addition, serial data symbol periods of different frames can be set to be different, and the safety of data transmission can be further improved.
(1) The invention provides a serial data communication rate self-adapting method, which comprises that a transmitting terminal: according to the set symbol period of the transmitting terminal, the transmitting terminal transmits a specific start bit symbol, and the pulse period of the specific start bit symbol pulse received by the receiving terminal is positioned at the set proportion of the symbol period; the transmitting terminal transmits serial data according to a symbol period; the transmitting end transmits a specific stop bit symbol, and the pulse period of the receiving end receiving the specific stop bit symbol pulse is positioned at the tail end of the symbol period, so that the transmission of the frame serial data is finished; receiving end: the receiving end receives the specific start bit symbol and obtains the symbol period of the transmitting end according to the pulse period of the specific start bit symbol and the set proportion of the symbol period; obtaining serial data according to the symbol period to realize the communication rate self-adaption of the serial data; the receiving end receives the specific stop sign bit and finishes the receiving of the serial data of the frame; both communication parties send and receive according to the specific start bit and stop bit, the communication rate and the data length do not need to be confirmed in advance, the self-adaption of the serial data communication rate can be realized, the parameter setting during serial data communication is reduced, and the communication errors caused by inconsistent communication parameter setting are also reduced.
(2) The serial data communication rate self-adaption method provided by the invention can set different symbol periods for the serial data of different frames, and can improve the safety of data transmission
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.
Claims (4)
1. A method for serial data communication rate adaptation, comprising:
a transmitting end:
according to the set symbol period of the transmitting terminal, the transmitting terminal transmits a specific start bit symbol, and the pulse period of the specific start bit symbol pulse received by the receiving terminal is positioned at the set proportion of the symbol period;
the transmitting terminal transmits serial data according to the symbol period;
the transmitting end transmits a specific stop bit symbol, and the pulse period of the receiving end receiving the specific stop bit symbol pulse is positioned at the tail end of the symbol period, so that the transmission of the serial data of the frame is finished;
receiving end:
the receiving end receives the specific start bit symbol and obtains the symbol period of the transmitting end according to the pulse period of the specific start bit symbol and the set proportion of the symbol period;
obtaining serial data according to the symbol period to realize the communication rate self-adaption of the serial data;
the receiving end receives the specific stop sign bit and finishes the receiving of the frame serial data.
2. The method according to claim 1, wherein the transmitting end sends a specific start bit symbol according to a set symbol period of the transmitting end, and the pulse period of the specific start bit symbol received by the receiving end is located at a set ratio of the symbol period, specifically:
the specific start bit symbol pulse is high level, and the specific start bit symbol is low level, high level and low level; the pulse period of a particular start bit symbol is located in one of the 2 nd and third symbol periods.
3. The method according to claim 1, wherein the transmitting end sends a specific stop bit symbol, and the receiving end makes the pulse period of the specific stop bit symbol at the end of the symbol period, and ends the sending of the serial data, specifically:
the specific stop bit symbol pulse is at high level, and the specific stop bit symbol is at low level, low level and high level; the pulse period of a particular stop bit symbol is located in one of the 3 rd three symbol periods.
4. The serial data communication rate adaptation method of claim 1,
the serial data symbol periods are different for different frames.
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| CN202210820415.8A CN115242351B (en) | 2022-07-13 | 2022-07-13 | Self-adaptive method for serial data communication rate |
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