CN105005511A - Serial communication data checking method - Google Patents
Serial communication data checking method Download PDFInfo
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- CN105005511A CN105005511A CN201510387234.0A CN201510387234A CN105005511A CN 105005511 A CN105005511 A CN 105005511A CN 201510387234 A CN201510387234 A CN 201510387234A CN 105005511 A CN105005511 A CN 105005511A
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Abstract
The present invention relates to a serial communication data checking method. The method is characterized in that a set of serial communication data sent by a sender sequentially comprises a serial communication data text, a first check bit and a second check bit, wherein the first check bit is a parity check bit, the second check bit is the accumulated sum of the number of "1" in the serial communication data text; and after receiving the data sent by the sender, a receiver performs parity check at first and then performs check of the second check bit, and if the number of "1" in the received serial communication data text is the same as the second check bit, a signal of correctly receiving the data is given out, or otherwise, the signal of incorrectly receiving the data is given out. Compared to the prior art, the advantage of the serial communication data checking method is that according to the checking method provided by the present invention, firstly first-time check is performed by using "odd parity" or "even parity" and then second-time check is performed on the accumulated sum of the number of "1" in the serial communication data text; and the double check mode is high in reliability and will not cause misjudgment.
Description
Technical field
The present invention relates to a kind of serial communication data method of calibration.
Background technology
When serial communication, the method of calibration of take over party to the serial communication data accuracy received adopts " very " " idol " method of calibration usually, namely, the number of " 1 " (high level) in one group of serial communication data received is added up, then by being that odd number or even number verify.This method of calibration erroneous judgement possibility is comparatively large, during as " odd ", if when one group of data is because of strong electromagnetic generation odd number disturbing pulse, can produce erroneous judgement; Equally, time " even parity check ", one group of data, because receiving even number disturbing pulse, also can produce erroneous judgement.
Summary of the invention
Technical matters to be solved by this invention provides for above-mentioned prior art the serial communication data method of calibration that a kind of reliability is high, can not produce erroneous judgement.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of serial communication data method of calibration, it is characterized in that: one group of serial communication data that transmit leg sends comprises successively: serial communication data text+the first check bit+the second check bit, wherein the content of the first check bit is: be " 1 " when in serial communication data text, the number of " 1 " is odd number, in serial communication data text, the number of " 1 " is even number is " 0 "; Or first the content of check bit be: be " 0 " when in serial communication data text, the number of " 1 " is odd number, in serial communication data text, the number of " 1 " is even number is " 1 "; The content of the second check bit is: the Cumulate Sum of the number of " 1 " in serial communication data text;
When the content of the first check bit is: be " 1 " when in serial communication data text, the number of " 1 " is odd number, in serial communication data text, the number of " 1 " is even number is " 0 "; And after take over party receives the data that transmit leg sends, first the number of " 1 " in the serial communication data text of reception is added up, if the number of " 1 " is odd number in the serial communication data text received, and the first check bit is " 0 ", then provide the signal receiving corrupt data, if the first check bit is " 1 ", then carry out next step verification: if the number of " 1 " is identical with the second check bit in the serial communication data text received, then provide and receive the correct signal of data, otherwise provide the signal receiving corrupt data;
When the content of the first check bit is: be " 0 " when in serial communication data text, the number of " 1 " is odd number, in serial communication data text, the number of " 1 " is even number is " 1 "; And after take over party receives the data that transmit leg sends, first the number of " 1 " in the serial communication data text of reception is added up, if the number of " 1 " is odd number in the serial communication data text received, and the first check bit is " 1 ", then provide the signal receiving corrupt data, if the first check bit is " 0 ", then carry out next step verification: if the number of " 1 " is identical with the second check bit in the serial communication data text received, then provide and receive the correct signal of data, otherwise provide the signal receiving corrupt data.
Compared with prior art, the invention has the advantages that: method of calibration provided by the invention, first " odd " or " even parity check " is used to carry out first time checking, and then by carrying out second time checking to the Cumulate Sum of the number of " 1 " in serial communication data text, the mode of this double verification, reliability is high, can not produce erroneous judgement.
Accompanying drawing explanation
Fig. 1 is the content composition diagram of one group of serial communication data that in the embodiment of the present invention one, transmit leg sends;
Fig. 2 is serial communication data method of calibration process flow diagram in the embodiment of the present invention one;
Fig. 3 is serial communication data method of calibration process flow diagram in the embodiment of the present invention two.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
Embodiment one
The serial communication data method of calibration that the present embodiment provides, one group of serial communication data that transmit leg sends comprises successively: serial communication data text+the first check bit+the second check bit, wherein the content of the first check bit is: be " 1 " when in serial communication data text, the number of " 1 " is odd number, in serial communication data text, the number of " 1 " is even number is " 0 "; The content of the second check bit is: the Cumulate Sum of the number of " 1 " in serial communication data text;
When the content of the first check bit is: be " 1 " when in serial communication data text, the number of " 1 " is odd number, in serial communication data text, the number of " 1 " is even number is " 0 "; And after take over party receives the data that transmit leg sends, first the number of " 1 " in the serial communication data text of reception is added up, if the number of " 1 " is odd number in the serial communication data text received, and the first check bit is " 0 ", then provide the signal receiving corrupt data, if the first check bit is " 1 ", then carry out next step verification: if the number of " 1 " is identical with the second check bit in the serial communication data text received, then provide and receive the correct signal of data, otherwise provide the signal receiving corrupt data;
Embodiment two
With embodiment one unlike, the content of the first check bit is: for " 0 " when in serial communication data text, the number of " 1 " is odd number, in serial communication data text, the number of " 1 " is even number is " 1 ";
When the content of the first check bit is: be " 0 " when in serial communication data text, the number of " 1 " is odd number, in serial communication data text, the number of " 1 " is even number is " 1 "; And after take over party receives the data that transmit leg sends, first the number of " 1 " in the serial communication data text of reception is added up, if the number of " 1 " is odd number in the serial communication data text received, and the first check bit is " 1 ", then provide the signal receiving corrupt data, if the first check bit is " 0 ", then carry out next step verification: if the number of " 1 " is identical with the second check bit in the serial communication data text received, then provide and receive the correct signal of data, otherwise provide the signal receiving corrupt data.
Claims (1)
1. a serial communication data method of calibration, it is characterized in that: one group of serial communication data that transmit leg sends comprises successively: serial communication data text+the first check bit+the second check bit, wherein the content of the first check bit is: be " 1 " when in serial communication data text, the number of " 1 " is odd number, in serial communication data text, the number of " 1 " is even number is " 0 "; Or first the content of check bit be: be " 0 " when in serial communication data text, the number of " 1 " is odd number, in serial communication data text, the number of " 1 " is even number is " 1 "; The content of the second check bit is: the Cumulate Sum of the number of " 1 " in serial communication data text;
When the content of the first check bit is: be " 1 " when in serial communication data text, the number of " 1 " is odd number, in serial communication data text, the number of " 1 " is even number is " 0 "; And after take over party receives the data that transmit leg sends, first the number of " 1 " in the serial communication data text of reception is added up, if the number of " 1 " is odd number in the serial communication data text received, and the first check bit is " 0 ", then provide the signal receiving corrupt data, if the first check bit is " 1 ", then carry out next step verification: if the number of " 1 " is identical with the second check bit in the serial communication data text received, then provide and receive the correct signal of data, otherwise provide the signal receiving corrupt data;
When the content of the first check bit is: be " 0 " when in serial communication data text, the number of " 1 " is odd number, in serial communication data text, the number of " 1 " is even number is " 1 "; And after take over party receives the data that transmit leg sends, first the number of " 1 " in the serial communication data text of reception is added up, if the number of " 1 " is odd number in the serial communication data text received, and the first check bit is " 1 ", then provide the signal receiving corrupt data, if the first check bit is " 0 ", then carry out next step verification: if the number of " 1 " is identical with the second check bit in the serial communication data text received, then provide and receive the correct signal of data, otherwise provide the signal receiving corrupt data.
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| CN201510387234.0A CN105005511A (en) | 2015-06-30 | 2015-06-30 | Serial communication data checking method |
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| CN201510387234.0A CN105005511A (en) | 2015-06-30 | 2015-06-30 | Serial communication data checking method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108197688A (en) * | 2018-02-07 | 2018-06-22 | 施玥 | A kind of coding mode with check code |
| CN109039536A (en) * | 2018-07-24 | 2018-12-18 | 上海小蚁科技有限公司 | Transmission method, equipment and the readable medium of data |
| CN110457970A (en) * | 2019-09-12 | 2019-11-15 | 上海明矽微电子有限公司 | A kind of self checking method of memory in RFID chip |
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| CN110457970A (en) * | 2019-09-12 | 2019-11-15 | 上海明矽微电子有限公司 | A kind of self checking method of memory in RFID chip |
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