CN107734002B - Bluetooth data receiving device and method thereof - Google Patents
Bluetooth data receiving device and method thereof Download PDFInfo
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- CN107734002B CN107734002B CN201710876722.7A CN201710876722A CN107734002B CN 107734002 B CN107734002 B CN 107734002B CN 201710876722 A CN201710876722 A CN 201710876722A CN 107734002 B CN107734002 B CN 107734002B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
Abstract
The invention discloses a receiving device and a method of Bluetooth data, which comprises a receiving end with a virtual serial port of Bluetooth equipment, wherein the receiving end reads all data in a buffer area, traverses from a first byte of the data to find a starting point of a first group of data, the first group of data and the data behind the first group of data are received data, calculates the length L of the received data, and the receiving end obtains redundant data by surplus data acquired by the receiving end according to the length K of a data packet, and stores the redundant data in a storage memory and receives the received data of other parts, wherein when the receiving end receives the data in the next round, the receiving end integrates the redundant data before the received data in the next round, the redundant data is stored by arranging the storage memory, and then when the next data is received, the redundant data is read together with the data in the buffer area, and the receiving integrity of the Bluetooth data is realized.
Description
Technical Field
The invention belongs to the technical field of data transmission; relates to a method for receiving Bluetooth data by a receiving end; in particular to a receiving device of Bluetooth data; and also relates to a method for receiving the Bluetooth data.
Background
Since 2012 later, the operation of the bluetooth of the PC end can be performed by virtualizing the bluetooth into a serial port, which greatly facilitates the algorithm design of a programmer when the data acquisition requires the coexistence of the bluetooth and serial port operations, but also has a serious problem; the virtual serial ports that become of bluetooth promptly, when receiving data, can find that the condition of the fault often appears in the data received, lead to the data package incomplete, appear this kind of condition and bluetooth distributed buffer memory size and transmission rate have very big relation, also have the relation with the method that present receiving terminal received bluetooth data moreover.
At present, when a receiving end receives Bluetooth data, only a complete data packet is taken, and redundant data is discarded, so that the receiving speed of the data can be improved, but the problems of data fault, data error and confusion exist in the receiving of the Bluetooth data.
Disclosure of Invention
The invention provides a method for receiving Bluetooth data, which can ensure that data is not discarded when a Bluetooth virtual serial port and the Bluetooth data are received, and ensure the integrity of the data.
The invention also provides a receiving device of the Bluetooth data, which stores the redundant data by arranging a storage memory, then reads the redundant data together with the data of the buffer area when receiving the next data, receives the redundant data and realizes the integrity of the Bluetooth data reception.
The technical scheme of the invention is as follows: a method for receiving bluetooth data, comprising the steps of:
and 4, storing the redundant data, then receiving the data of the next round, and in the process of receiving the data of the next round, firstly receiving the redundant data and then receiving the received data of the next round.
Furthermore, the invention is characterized in that:
in step 2, the starting point of the first group of data is found in the data, specifically, each byte is traversed from the first byte of the data, and whether the data is the received first group of data is determined.
Wherein the judgment in step 2 is yes, the receiving end starts to receive the data after the first group of data.
If the judgment in the step 2 is not yes, the receiving end receives the redundant data in the previous data receiving process, and then receives the first group of data and the subsequent data.
In step 2, the receiving end integrates the redundant data before the first group of data, and then the receiving end starts to receive the data.
In the next round of data receiving process in step 4, the receiving end integrates the redundant data before the next round of received data, and then starts to receive data.
The invention also provides a Bluetooth data receiving device, which comprises a receiving end with a virtual serial port of Bluetooth equipment, wherein the receiving end reads all data in the buffer area, traverses from the first byte of the data to find the starting point of the first group of data, the first group of data and the data after the first group of data are received data, calculates the length L of the received data, and obtains redundant data by the receiving end by carrying out complementation on the received data according to the length K of a data packet, the receiving end stores the redundant data in a storage memory and receives the received data of other parts, and when the receiving end receives the data in the next round, the receiving end integrates the redundant data in front of the starting position of the received data in the next round.
Compared with the prior art, the method has the advantages that in the process of receiving the Bluetooth data by the receiving end, the length of the received data is processed, namely the length L of the received data is subjected to complementation according to the length K of the data packet to obtain redundant data smaller than K bits, the redundant data is stored, in the next round of data receiving process, the redundant data and the next round of received data are received together, the complete receiving of the data is realized, the data is not discarded, and the complete receiving of the data is realized.
Furthermore, a starting point of the first group of data is found in the data, a traversal mode is adopted, and whether the first group of data is received or not is judged from the first byte; since the data transmitted/received by bluetooth is in accordance with the protocol specification, it is possible to find the starting point of the received data from the data according to the protocol.
Furthermore, the receiving end can receive the redundant data of the previous round and the current received data together in the next round of data receiving process, or the redundant data of the previous round and the current received data are integrated and then received, so that the integrity of the data is realized.
The invention also has the following beneficial effects: the invention adds a memory for storing redundant data, and in the next round of received data, the receiving end reads the redundant data from the memory; the Bluetooth data receiving device avoids the loss of redundant data, achieves the receiving of the redundant data, and achieves the integrity of Bluetooth data receiving.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
fig. 2 is a schematic structural diagram of the present invention.
In the figure: 1 is a receiving end; 2 is a buffer area; and 3 is a storage memory.
Detailed Description
The technical solution of the present invention is further explained with reference to the accompanying drawings and specific embodiments.
The invention provides a method for receiving Bluetooth data, as shown in fig. 1, the method specifically comprises the following steps:
The first group of data is judged in step 2, because when the receiving end receives the data in the buffer area, it is first judged whether the received data of the current round is a new data transmission process, if not, the received data of the current round is a part of data in the middle of a complete data transmission process, and therefore the redundant data generated in the previous round needs to be received; if it is a new data transmission process, there is no upper round of data reception process.
And 3, the receiving end calculates the received data obtained in the step 2 and obtains redundant data by calculating the remainder according to the length of the data packet, wherein the length of the received data is L, the length of the data packet is K, the length of the data packet is the length of the data packet sent by the sending end each time, a length can be set for the receiving end, the length L of the received data is divided by the length of the data packet to obtain a divisor M and a remainder N, namely the received data comprises M received data packets and N bytes of redundant data, and the redundant data is not enough to form a complete received data packet, so the redundant data needs to be processed in the following mode.
Step 4, storing the redundant data in the step 3, wherein a receiving end can set a section of storage memory specially used for storing the redundant data in the memory; in the next round of data reception, the redundant data is received together with the next round of reception data. Specifically, in the next round of data receiving process, redundant data is merged before the received data obtained in the step 2 of the next round, then the merged data is used as the received data, and the calculation of the step 3 is performed, so that the whole data receiving work is completed in a circulating manner.
The embodiment of the invention is as follows:
example 1
The invention is explained by taking an example that a PC receiving end receives first round data sent by a sending end, wherein the length of a data packet is 16 bytes, and the specific operation is as follows
Firstly, the Bluetooth device at the PC receiving end is virtualized into a serial port, after the PC receiving end is connected with the sending end through Bluetooth, receiving 1500 bytes of data sent by the sending end, the PC receiving end finds the 50 th byte as the starting point of the first group of data through the Bluetooth protocol, wherein, the data of 1-49 bytes is invalid data sent by the sending end, so the received data of the first round is 1451 bytes of data in total from 50-1500, the length of the received data is 1451, and then, the length 16 of the data packet is complemented to obtain 90 complete data packets, 11 bytes of redundant data are remained, because 11 bytes of data are not enough for the length of one data packet, 11 bytes of redundant data are stored in a storage memory which is arranged in the PC receiving end and is specially used for storing the redundant data, and then the receiving end processes 90 complete data packets.
In the second round of data reception, the PC receiving end still receives 1500 bytes of data sent by the sending end, combines 11 bytes of redundant data of the previous round with the data of this time, and takes 16 bytes of the first group as the first group of data of this time reception, so the length of the received data of the second round is 1511, and then the length 16 of the data packet is subjected to remainder to obtain 94 complete data packets, and 7 bytes of redundant data remain, and then the storage memory is emptied and the 7 bytes of redundant data are stored in the storage memory.
And then the process is circulated until the receiving end of the PC receives all the data of the transmitting end.
Example 2
The invention takes the example that the PC receiving end receives the 6 th round of data sent by the sending end as an example for explanation, wherein the length of the data packet is 8 bytes, and the redundant data of 4 bytes is stored in the storage memory in the 5 th round of data receiving process; the specific operation is as follows:
a PC receiving end receives 992 bytes of data sent by a sending end in the 6 th data receiving in one data transmission process, firstly, 4 bytes of redundant data stored in a memory in the 5 th data receiving process are integrated to the initial position of received data, and the length of the obtained new received data is 1000; and then, the length 8 of the data packet is complemented to obtain 125 complete data packets, and no redundant data is generated in the current round, so that the PC receiving end directly receives the 125 complete data packets to complete the data receiving work of the 6 th round.
In the 7 th round of data receiving process, the PC receiving end receives 1002 bytes of data sent by the sending end, and since no redundant data is generated in the 6 th round of data receiving process, the length of the received data of the 7 th round of data receiving seed is 1000, and then the length 8 of the data packet is complemented to obtain 125 complete data packets and 2 bytes of redundant data, the redundant data is stored in the storage memory, and the PC receiving end processes the 125 complete data packets.
The invention also provides a Bluetooth data receiving device, as shown in fig. 2, which comprises a receiving end 1, wherein the receiving end 1 is a PC end or other receiving terminals, a Bluetooth device of the receiving end 1 is virtualized into a serial port, the receiving end 1 receives data in a buffer 2, the data in the buffer 2 is data sent outside by a sending end, the receiving end 1 and the sending end are directly read the data sent by the sending end from the buffer 2 after being connected through Bluetooth, the receiving end 1 needs further judgment and calculation after obtaining the data in the buffer 2, the receiving end 1 firstly judges whether the received data is the first round of data reception in the data transmission process, namely, each byte is traversed from the first byte according to a Bluetooth protocol, the starting point of data reception is found according to byte information, the data from the starting point and the data after the starting point are the received data of the current round, the length of the received data is L, the received data is complemented according to the length K of the data packet, the obtained divisor is M, the remainder is N, the M complete data packets and the N bytes of the redundant data are stored in a memory storage space of the receiving end, and the next round of the redundant data is stored in a next round of the next round, and the next round of redundant data is stored in the next round of the M, the redundant data is stored in the next round of the next round, and the redundant data, the redundant data is stored in the next round, the next round of the redundant data, and the redundant data, the redundant data is stored in the redundant data.
Claims (4)
1. A method for receiving bluetooth data, comprising the steps of:
step 1, virtualizing a Bluetooth device at a receiving end into a serial port, and receiving all data of a buffer area by the serial port;
step 2, finding the starting point of the first group of data in the data, wherein the data after the starting point is received data, and the receiving end receives the data; specifically, the method comprises the following steps: the receiving end finds the starting point of the first group of data from the data according to the Bluetooth protocol, traverses each byte from the first byte of the data, and judges whether the byte is the received first group of data; when the judgment is yes, the receiving end starts to receive the data after the first group of data; when the judgment is not yes, the receiving end firstly receives redundant data in the previous round of received data and then receives the first group of data and the data after the first group of data;
step 3, calculating the length L of the received data in step 2, and obtaining redundant data by calculating the remainder according to the length K of the data packet;
and 4, storing the redundant data, then receiving the data of the next round, and in the process of receiving the data of the next round, firstly receiving the redundant data and then receiving the received data of the next round.
2. The method for receiving bluetooth data according to claim 1, wherein in step 2, the receiving end integrates the redundant data before the first set of data, and then the receiving end starts receiving the data.
3. The method for receiving bluetooth data according to claim 1, wherein in the step 4, during the next round of data reception, the receiving end integrates redundant data before the next round of received data, and then starts receiving data.
4. A receiving device of Bluetooth data is characterized by comprising a receiving end (1) with a virtual serial port of Bluetooth equipment, wherein the receiving end (1) reads all data in a buffer area (2), the receiving end (1) traverses from a first byte of the data to find a starting point of a first group of data, the first group of data and the data behind the first group of data are received data, the receiving end (1) calculates the length L of the received data, and the receiving end (1) deduces the remainder of the received data according to the length K of a data packet to obtain redundant data, the receiving end (1) stores the redundant data in a storage memory (3) and receives the received data of other parts;
and when the receiving end (1) receives data in the next round, the redundant data is integrated before the initial position of the received data in the next round.
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| CN201710876722.7A CN107734002B (en) | 2017-09-25 | 2017-09-25 | Bluetooth data receiving device and method thereof |
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| CN107734002B true CN107734002B (en) | 2020-07-17 |
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| CN104135339A (en) * | 2014-07-08 | 2014-11-05 | 福建联迪商用设备有限公司 | Bluetooth low-power-consumption communication method, Bluetooth equipment and system |
| CN105900347A (en) * | 2015-10-27 | 2016-08-24 | 深圳还是威健康科技有限公司 | Bluetooth-based data transmission method and device |
| CN106162536A (en) * | 2016-08-30 | 2016-11-23 | 韦嘉志 | A kind of system of bluetooth data transmission |
| CN106571894A (en) * | 2016-11-10 | 2017-04-19 | 深圳市民德电子科技股份有限公司 | Bluetooth information sending and receiving methods |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120302169A1 (en) * | 2011-05-25 | 2012-11-29 | Sunrex Technology Corp. | Bluetooth data transmission system and method |
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Patent Citations (6)
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|---|---|---|---|---|
| CN101447808A (en) * | 2007-11-27 | 2009-06-03 | 中兴通讯股份有限公司 | Bluetooth file transmission system |
| JP5170697B2 (en) * | 2009-03-30 | 2013-03-27 | Ｋｄｄｉ株式会社 | Bluetooth communication method and system |
| CN104135339A (en) * | 2014-07-08 | 2014-11-05 | 福建联迪商用设备有限公司 | Bluetooth low-power-consumption communication method, Bluetooth equipment and system |
| CN105900347A (en) * | 2015-10-27 | 2016-08-24 | 深圳还是威健康科技有限公司 | Bluetooth-based data transmission method and device |
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