CN102129395A - Communication method for implementing multi-process control through single hardware serial port - Google Patents
Communication method for implementing multi-process control through single hardware serial port Download PDFInfo
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Abstract
The invention discloses a communication method for implementing multi-process control through a single hardware serial port, which comprises the steps that: as much as 16 virtual serial port channels are provided on the single hardware serial port, a transmitting party transmits an application data packet to a receiving party on a multi-process control protocol layer according to the generation mode of the data packet, the receiving party unpacks and analyzes the data packet on the peer-to-peer multi-process control protocol layer. The method has the advantages that: multi-process control is offered to application by utilizing one essential hardware serial port, thereby saving the pin of hardware chip which increasingly becomes valuable in product design and being favorable for chip minimization; only 4 bytes are used as the control bytes for the data packet, which greatly improves the transmission speed and efficiency of data on the hardware serial port; and the data packet adopts the simple and effective generation mode which only takes up quite less memory and calculation resource, so the communication method is particularly suitable for high-speed data transmission and portable electronic products.
Description
Technical field
The present invention relates to a kind of means of communication of implementation process control between the hardware serial ports, particularly a kind of means of communication that realize multi-process control by single hardware serial ports.
Background technology
In present three generations's wireless communication standard communications protocol (3GPP 27.010 standards), a kind of very universal subscriber equipment and the traffic pilot communications protocol between terminal device have been defined, on single hardware serial ports, come, for the communication of equipment room provides multichannel virtual serial port passage, realize the communication of multi-process.Yet, the means of communication of using this agreement implementation process to transmit are too complicated, and this agreement control byte accounts for the too many packet space of tool, cause data efficiency low and expend too many computational resource, in actual applications, should even can consume computational resource, should this can't on the high speed serial ports of this class of USB, use up to 50%～75% center processor.
Summary of the invention
Goal of the invention: at the problem and shortage of above-mentioned prior art existence, the purpose of this invention is to provide a kind of means of communication that realize multi-process control by single hardware serial ports, this method can be saved the hardware chip number of pins on the product, improve the data transfer rate and the efficient of hardware serial ports, save computational resource.
Technical scheme: a kind of means of communication by single hardware serial ports realization multi-process control comprise the steps:
(1) formation of sender's packet comprises the steps:
(A) application programs is distributed the virtual serial port channel number;
(B) sequence of data packet number is initialized as 0;
(C) receive the load data of application program described in the step (A) itself, and be sent to sender's multi-process control protocol layer;
(D) on sender's multi-process control protocol layer, the control byte that will form according to the order of virtual serial port channel number, sequence of data packet number, load data type, load data length, proof test value forms described sender's packet in order with load data itself described in the step (C) again;
(2) the described sender's packet of step (1) is sent to the take over party by single hardware serial ports;
(3) take over party unpacks, analyzes the packet that step (2) transmits, and comprises the steps:
(E) packet that transmits is sent to take over party's multi-process control protocol layer;
(F) preceding 3 bytes of data fetch packet are calculated its proof test value, if this proof test value equates then continuation with packet the 4th byte value that transmits; If this proof test value does not wait with packet the 4th byte value that transmits, then require the sender to resend the described sender's packet of step (1);
(G) preceding 4 bytes of data fetch packet are resolved according to the order of virtual serial port channel number, sequence of data packet number, load data type, load data length;
(H) according to the sequence of data packet that parses number, load data type the application's data of packet carrying is carried out necessary assembling;
(I) according to the virtual serial port channel number that parses, will send to the application program that the side of picking uses this virtual serial port channel number by the application's data after step (H) assembling, promptly finish the communication of process.
The value of described virtual serial port channel number is 0-15, accounts for preceding 4 of packet the 0th byte; The value of described sequence of data packet number is 0-127, accounts for back 4 and the 1st byte preceding 3 of packet the 0th byte; The value of described load data type is 0-7, accounts for the 4-2 position of packet the 1st byte; The value of described load data length is 0-1023, accounts for back 2 and the 2nd byte whole 8 of packet the 1st byte; The value of described proof test value is 0-255, accounts for whole 8 of packet the 3rd byte; Described load data itself is the longest to be 1023 bytes.
Channel number is that 0 virtual serial port passage is a control channel.
If sender's application program load data itself surpasses 1023 bytes, then the value of returning the data packet number after the step (D) that is transmitted in of this application program adds up, and the sender's packet that begins to continue to form this application program from step (C) transmits.
When the packet of certain virtual serial port passage transmits the generation obstruction, the sender's that generation is stopped up multi-process control protocol layer or take over party's multi-process control protocol layer utilize control channel, transmission is ceased and desisted order to the other side's multi-process control protocol layer, obstruction data in the buffer memory district are consumed to the greatest extent, and then can utilize control channel, the multi-process control protocol layer that the other side is given in order is opened in transmission, and the packet that restarts this virtual serial port passage transmits.
Beneficial effect: the present invention has realized utilizing the hardware serial ports of an essence to provide the nearly means of communication of the multi-process control of 16 virtual serial port passages for application program, a plurality of different application program on the processor of both sides, can independently use separately one even many virtual serial port passages, carry out the communication of multi-process, thereby precious day by day hardware chip number of pins in the saving product design helps the microminiaturization of chip.
The control byte of application data bag only needs 4 very short bytes in the means of communication of the present invention, only occupy very little packet space, make packet can load the valid data of more applications program, improved the transfer rate and the efficient of data on the hardware serial ports greatly.
Packet adopts succinct effectively formation pattern, only takies seldom internal memory and computational resource, is easy to realize on software.The formation reconciliation packet procedures of application data bag is simple, particularly the completeness check to packet calculates, only need carry out preceding 3 control bytes of packet, and the proof test value byte places before the load data itself, allow each control area of packet that a fixing position is all arranged, improve computing velocity, reduced calculated amount, be particularly suitable for high speed data transfer and portable type electronic product.
Description of drawings
Fig. 1 is the hardware serial communications system connection layout between typical microprocessor;
Fig. 2 is a means of communication systematic schematic diagram of the present invention;
Fig. 3 is the formation process flow diagram of virtual serial port channel transfer side packet;
Fig. 4 is the unpacking of virtual serial port passage receiving side data bag, analysis process figure;
Fig. 5 is for using the framework map of smart mobile phone of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand these embodiment only is used to the present invention is described and is not used in and limit the scope of the invention, after having read the present invention, those skilled in the art all fall within the application's claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
The present invention is suitable between the computing machine or the communication between the microprocessor.Hardware serial communications system between sort processor as shown in Figure 1, it generally includes: parts such as primary processor, auxiliary processor, hardware serial ports.The typical products of using this communication system has: the communication between the communication between dual-core mobile phone, laptop computer and its built-in wireless network card etc., this hardware serial ports commonly used has: UART, USB and MIPI etc.And the realization of communication system as shown in Figure 1, if each application program by separately independently a hardware serial ports transmit data, then on product, need a plurality of hardware serial ports.
What the means of communication of the present invention will realize is to open up many virtual serial port passages on a hardware serial ports, thereby realizes the multi-process parallel communication.Accompanying drawing 2 has provided means of communication systematic schematic diagram of the present invention, and a plurality of different application program on primary processor and the auxiliary processor can independently be used separately one even many virtual serial port passages, carries out the multi-process communication.Sender's application program is specified a virtual serial port channel number, on sender's multi-process control protocol layer, application program is formed packet, then by the hardware serial ports, packet is sent to the take over party, the take over party on the take over party's of equity multi-process control protocol layer, unpacks analysis with packet after receiving packet, according to the virtual serial port channel number that parsing obtains, software is accepted on the corresponding upper strata that load data is sent to this tunnel of use.
The formation pattern of packet is as shown in the table:
| CH | SeqNo | Type | Length | FCS | DataPayload |
Wherein:
CH is the virtual serial port channel number, and (preceding 4 of the 0th byte: Byte0_bit7_4), span is 0-15 to account for the packet nybble;
SeqNo is a sequence of data packet number, and (preceding 3 of back the 4+the 1st byte of the 0th byte: Byte0_bit3_0+Byte1_bit7_5), span is 0-127 to account for 7 of packets;
Type is the load data type, and (the 4-2 position of the 1st byte: Byte1_bit4_2), span is 0-7 to account for 3 of packets;
Length is a load data length, account for 10 of packets (whole 8 of last the 2+the 2nd byte of the 1st byte: Byte1_bit1-0+Byte2_bit7_0), span is 0-1023, and the maximum load (length) of expression load data can reach 1023 bytes;
FCS is a proof test value, is the proof test value to preceding 3 bytes of packet, and (whole 8 of the 3rd byte: Byte3_bit7_0), span is 0-255 to account for 8 of packets;
Data Payload is a load data itself, and its length depends on needs the application's data length transmitted at that time, the longest 1023 bytes that reach, and simultaneously, its length also is subject to the maximum allowable number of hardware serial ports according to packet length.
The formation flow process of virtual serial port channel transfer side packet, as shown in Figure 3: application programs is distributed the virtual serial port channel number; Sequence of data packet number is initialized as 0; Receive that application program is the load data of m byte itself, and be sent to sender's multi-process control protocol layer; On sender's multi-process control protocol layer, formation pattern according to packet, 4 control bytes that will form according to the order of virtual serial port channel number, sequence of data packet number, load data type, load data length, proof test value, load data itself with the m byte forms sender's packet again, be sent to the take over party by single hardware serial ports, finish the transmission of sender's packet; If sender's application program load data itself surpasses 1023 bytes, then this application's data does not transmit and finishes, the value of returning the data packet number adds up, this application program is extracted load data itself to be passed, and the sender's packet that continues this application program of formation transmits.
The unpacking of virtual serial port passage receiving side data bag, analysis process, as shown in Figure 4: the take over party is sent to the packet that transmits on take over party's multi-process control protocol layer; Preceding 3 bytes of data fetch packet, calculate its proof test value, if this proof test value does not wait with packet the 4th byte value that transmits, then require the sender to resend sender's packet, if this proof test value equates with packet the 4th byte value that transmits, preceding 4 bytes of data fetch packet then according to the formation pattern of packet, parse virtual serial port channel number, sequence of data packet number, load data type, load data length; According to the sequence of data packet that parses number, load data type the application's data of packet carrying is carried out necessary assembling; According to the virtual serial port channel number that parses, the application's data after the assembling is sent to the application program that the side of picking uses this virtual serial port channel number, promptly finish the communication of process.
Sender and take over party's two side's processors need transmit and receive data simultaneously, and therefore, both sides' multi-process control protocol layer all needs to implement the transmission of accompanying drawing 3 and accompanying drawing 4 simultaneously and accept flow process, to satisfy two-way data transmission.
When realizing, common 0 virtual serial port passage is set to control channel, be used for coordinating passage foundation, data flow and the obstruction control etc. of the multi-process control protocol layer of major and minor processor, remaining 1-15 bar virtual serial port passage can arbitrarily be arranged by application software.When the packet of certain virtual serial port passage transmits the generation obstruction, one side's of obstruction multi-process control protocol layer takes place, can utilize 0 virtual serial port passage, transmit the packet of ceasing and desisting order and give the other side's multi-process control protocol layer, notify the other side with the blocked state of this passage, to reduce the data volume that the other side sends, obstruction data in the buffer memory district are consumed to the greatest extent, and then can utilize 0 virtual serial port passage, transmit one and open the multi-process control protocol layer that command packet is given the other side, the packet that restarts this virtual serial port passage transmits.
The calculating of proof test value can be calculated according to the selection algorithm that requires of oneself by the user, and the user can use the simplest accumulation calculating method, also can adopt complexity but more reliable some other algorithm.
Below be example with the double-core smart mobile phone, practical application of the present invention is described.The framework of typical case's smart mobile phone as shown in Figure 5, it generally includes an application processor AP and a Communication processor CP, needs at least two hardware serial ports to keep two communications between processor between two processors usually: the control command that the hardware serial ports is used to transmit the wireless network state and makes a phone call, send this class of note; Big flow continuous data when another hardware serial ports is used to transmit browser and online file download.In the time of more, system also needs to increase a hardware serial ports again, is used to transmit the spike record of production debugging.These have increased the cost of hardware greatly.
After having used the present invention to realize the means of communication of multi-process control by single hardware serial ports, only need to increase a multi-process control protocol layer of the present invention, on this multi-process control protocol layer according to the formation pattern of packet, form packet, or unpack, analyze packet, above-mentioned 3 hardware serial ports just can be realized with 3 virtual serial ports.On hardware, only need take the hardware serial ports of an essence, thereby save hardware resource greatly.
Because the data volume of the control command of control channel is all very little usually, with the same hardware serial ports of exclusive data virtual serial port channels share, also can not bring bad influence to the performance of whole intelligent mobile phone system.
Claims (5)
1. the means of communication by single hardware serial ports realization multi-process control is characterized in that comprising the steps:
(1) formation of sender's packet comprises the steps:
(A) application programs is distributed the virtual serial port channel number;
(B) sequence of data packet number is initialized as 0;
(C) receive the load data of application program described in the step (A) itself, and be sent to sender's multi-process control protocol layer;
(D) on sender's multi-process control protocol layer, the control byte that will form according to the order of virtual serial port channel number, sequence of data packet number, load data type, load data length, proof test value forms described sender's packet in order with load data itself described in the step (C) again;
(2) the described sender's packet of step (1) is sent to the take over party by single hardware serial ports;
(3) take over party unpacks, analyzes the packet that step (2) transmits, and comprises the steps:
(E) packet that transmits is sent to take over party's multi-process control protocol layer;
(F) preceding 3 bytes of data fetch packet are calculated its proof test value, if this proof test value equates then continuation with packet the 4th byte value that transmits; If this proof test value does not wait with packet the 4th byte value that transmits, then require the sender to resend the described sender's packet of step (1);
(G) preceding 4 bytes of data fetch packet are resolved according to the order of virtual serial port channel number, sequence of data packet number, load data type, load data length;
(H) according to the sequence of data packet that parses number, load data type the application's data of packet carrying is carried out necessary assembling;
(I) according to the virtual serial port channel number that parses, will send to the application program that the side of picking uses this virtual serial port channel number by the application's data after step (H) assembling, promptly finish the communication of process.
2. the means of communication by single hardware serial ports realization multi-process control according to claim 1, it is characterized in that: the value of described virtual serial port channel number is 0-15, accounts for preceding 4 of packet the 0th byte; The value of described sequence of data packet number is 0-127, accounts for back 4 and the 1st byte preceding 3 of packet the 0th byte; The value of described load data type is 0-7, accounts for the 4-2 position of packet the 1st byte; The value of described load data length is 0-1023, accounts for back 2 and the 2nd byte whole 8 of packet the 1st byte; The value of described proof test value is 0-255, accounts for whole 8 of packet the 3rd byte; Described load data itself is the longest to be 1023 bytes.
3. according to claim 1ly realize it is characterized in that the means of communication of multi-process control by single hardware serial ports: channel number is that 0 virtual serial port passage is a control channel.
4. the means of communication that realize multi-process control by single hardware serial ports according to claim 1, it is characterized in that: if sender's application program load data itself surpasses 1023 bytes, then the value of returning the data packet number after the step (D) that is transmitted in of this application program adds up, and the sender's packet that begins to continue to form this application program from step (C) transmits.
5. the means of communication that realize multi-process control by single hardware serial ports according to claim 3, it is characterized in that: when the packet of certain virtual serial port passage transmits the generation obstruction, the sender's that generation is stopped up multi-process control protocol layer or take over party's multi-process control protocol layer utilize control channel, transmission is ceased and desisted order to the other side's multi-process control protocol layer, obstruction data in the buffer memory district are consumed to the greatest extent, and then can utilize control channel, the multi-process control protocol layer that the other side is given in order is opened in transmission, and the packet that restarts this virtual serial port passage transmits.
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| CN103942015A (en) * | 2014-04-25 | 2014-07-23 | 长春工业大学 | Computer and printer bidirectional parallel communicating method based on data package |
| CN105045757A (en) * | 2015-07-01 | 2015-11-11 | 天津国芯科技有限公司 | Method and apparatus for implementing serial communication protocol by using microprocessor |
| CN104067252B (en) * | 2012-01-25 | 2017-03-01 | 高通股份有限公司 | Multi-channel high-speed interface for high-speed synchronous serial line interface (HSI) and related system and method |
| CN106598756A (en) * | 2016-12-13 | 2017-04-26 | 重庆川仪自动化股份有限公司 | Data interaction method among different application programs |
| CN108377232A (en) * | 2018-01-29 | 2018-08-07 | 杭州鸿泉物联网技术股份有限公司 | A kind of multi-protocol communication method and device |
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| CN111653078A (en) * | 2020-05-28 | 2020-09-11 | 北京萨达智能技术有限公司 | Tower crane anti-collision data transceiving device and method based on wireless data transmission |
| CN111653078B (en) * | 2020-05-28 | 2024-02-06 | 北京萨达智能技术有限公司 | Tower crane anti-collision data receiving and transmitting device and method based on wireless data transmission |
| CN112799981A (en) * | 2021-01-26 | 2021-05-14 | 展讯半导体(成都)有限公司 | Data transmission control method, function machine and related product |
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Application publication date: 20110720 |