CN103514126A - Method, system and device for receiving data - Google Patents
Method, system and device for receiving data Download PDFInfo
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- CN103514126A CN103514126A CN201210214211.6A CN201210214211A CN103514126A CN 103514126 A CN103514126 A CN 103514126A CN 201210214211 A CN201210214211 A CN 201210214211A CN 103514126 A CN103514126 A CN 103514126A
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Abstract
The invention discloses a method, system and device for receiving data. The method includes the steps that a DMA controller stores data frame headers of received data frames in first storage space; after the situation that the data frame headers are received and stored is determined, the data frame headers stored in the first storage space are read, and information for representing data length is sent to an application program; after the situation that the data frame headers are received and stored is determined, data bodies of the received data frames are stored in second storage space; after the situation that the DMA controller receives and stores the data bodies is determined, the application program reads the data frame headers stored in the first storage space and the data bodies stored in the second storage space according to the information, acquired from the DMA controller, for representing the data length, wherein the data frame headers carry the information for representing the data length of the data frames. By the adoption of the technical scheme, the problem that the data frames read from the storage space by the application program are not uniform with practical data frames can be avoided, and the success rate of the application program for reading data is improved.
Description
Technical field
The present invention relates to computing machine and areas of information technology, relate in particular to a kind of method of reseptance, system and device of data.
Background technology
At present, embedded system is when communicating with high speed data transfer equipment, generally by the mode repeatedly receiving, receive a complete Frame, receive the partial data of this Frame at every turn, the length of this partial data can determine according to the data-handling capacity of the hardware of the local configuration of system, and, every reception one secondary data of system will produce interrupt request one time, this interrupt request can trigger central processing unit (Central Processing Unit, CPU) and call the operation that interrupt service routine carries out data receiver.In practical application, the each data volume receiving of CPU is limited, therefore, in the situation that the data volume that system receives is larger, the number of times that CPU finishes receiving all data also can correspondingly increase, and correspondingly, the number of processes that CPU calls interrupt service routine according to interrupt request also can increase, these processing procedures have improved the occupancy of cpu resource, may cause the reduction of cpu data processing power.
At present, for the problems referred to above, embedded system generally adopts the data receive mode of direct memory access (Direct Memory Access, DMA).Before adopting dma mode reception data, CPU mainly carries out initialization to the data receiver configuration of DMA, and for example, CPU can be the storage space that dma controller divides the Frame that is used in storing received according to the data length of predefined Frame.In the data receive mode of DMA, the reception that mainly completes data by dma controller operates, this dma controller can adapt to the embedded system of the hardware that has configured different pieces of information processing power, generally, dma controller can once receive a complete Frame, but the data length that requires this Frame meets the data length of the Frame of setting, and does not need by repeatedly receiving a Frame, thereby has reduced the processing resource of CPU to interrupt request.
In the data receive mode based on DMA, for generally fixing for storing the size of the storage space of the data that dma controller receives that dma controller distributes, also adopt the data receive mode of DMA, require the data length of each Frame receiving to fix.Be based upon the storage space of the fixed size of dma controller distribution, the operational circumstances that dma controller can carry out data storage according to this storage space judges whether to receive a Frame, for example, the data length of predefined Frame is 512bit, based on this data length, be that to divide the storage space of Frame that is used in this data length of storage be 1000bit to dma controller, so, at dma controller, receive in the process of data, the Frame of reception can be saved to the storage space corresponding to front 512bit of this storage space, at dma controller, determined after the reception of Frame, can produce interrupt request, and this interrupt request is sent to application program, by application program, according to the data length of the Frame of setting, from this storage space, read the data of respective length.Wherein, dma controller has been determined the reception of Frame, is mainly after storage space corresponding to the front 512bit that the Frame of reception is saved to storage space, judges in setting-up time, whether to receive data again, if do not receive, determined the reception of Frame.
Obviously, adopt the data receive mode of DMA, dma controller is mainly that the storage space based on pre-assigned fixed size receives the Frame that meets setting data length, in actual applications, difference due to practical business type, be difficult to guarantee that the data length of Frame is fixed value, in the case, may cause data receiver failure, for example, when the real data length of the Frame of current reception is greater than the data length of Frame of setting, may exist pre-assigned storage space to be less than the real data length of the Frame of current reception, so, dma controller can not receive complete Frame, and then application program also cannot get complete data, when the real data length of the Frame of current reception is less than the data length of Frame of setting, because application program is to read the data of corresponding data length from storage space according to the data length of the Frame of setting, therefore, may exist application program when reading this Frame, also can read the problem of other incoherent data messages, thereby cause Frame that application program reads and actual Frame inconsistent, reduced the success ratio of application program reading out data.
In sum,, there is Frame that application program reads from storage space and the actual inconsistent problem of Frame in the data receive mode of existing DMA, thereby cause the success ratio of application program reading out data.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of method of reseptance and device of data, adopts this technical scheme, can avoid Frame that application program reads from storage space and the inconsistent problem of Frame of actual transmissions.
The embodiment of the present invention is achieved through the following technical solutions:
According to the Yi Ge aspect of the embodiment of the present invention, a kind of method of reseptance of data is provided, comprising:
Dma controller is stored in the first storage space by the data frame head of the Frame of reception, described data frame head carries for characterizing the information of the data length of described Frame, definite, receive and stored after described data frame head, read the described data frame head that described the first storage space is preserved, and the information of the described data length that described data frame head is carried is sent to the application program for the treatment of described Frame, and, definite, receive and stored after described data frame head, the data volume of the described Frame receiving is stored in to the second storage space;
The information of the described data length that described application program sends according to described dma controller, determine that described dma controller receives and stored after described data volume, read the described data frame head of described the first storage space preservation and the described data volume that described the second storage space is preserved.
According to another aspect of the embodiment of the present invention, a kind of method of reseptance of data is also provided, comprising:
Dma controller is stored in the first storage space by the data frame head of the Frame of reception, and described data frame head carries for characterizing the information of the data length of described Frame;
Definite, receive and stored after described data frame head, read the described data frame head that described the first storage space is preserved, and the information of the described data length that described data frame head is carried is sent to the application program for the treatment of described Frame; And
Definite, receive and stored after described data frame head, the data volume of the described Frame receiving is stored in to the second storage space.
According to another aspect of the embodiment of the present invention, a kind of method of reseptance of data is also provided, comprising:
Application program receive that dma controller sends for characterizing the information of data length of the Frame of reception;
According to the information of described data length, determine that described dma controller receives and stored after the data volume of described Frame, read described dma controller and receive and be kept at the data frame head of described Frame of the first storage space and the described data volume that described dma controller received and be kept at described the second storage space.
According to another aspect of the embodiment of the present invention, a kind of receiving system of data is also provided, this system comprises dma controller and application program, wherein:
Described dma controller, for the data frame head of the Frame of reception is stored in to the first storage space, described data frame head carries for characterizing the information of the data length of described Frame, definite, receive and stored after described data frame head, read the described data frame head that described the first storage space is preserved, and the information of the described data length that described data frame head is carried is sent to the application program for the treatment of described Frame, and, definite, receive and stored after described data frame head, the data volume of the described Frame receiving is stored in to the second storage space,
Described application program, be used for according to the information of the described data length of described dma controller transmission, determine that described dma controller receives and stored after described data volume, read the described data frame head of described the first storage space preservation and the described data volume that described the second storage space is preserved.
According to another aspect of the embodiment of the present invention, a kind of receiving trap of data is also provided, comprising:
Data frame head storage unit, for the data frame head of the Frame of reception is stored in to the first storage space, described data frame head carries for characterizing the information of the data length of described Frame;
Data frame head storage monitoring unit, for determining whether described data frame head storage unit receives and stored described data frame head;
Data frame head reading unit, for determining that at described data frame head storage monitoring unit described data frame head storage unit receives and stored after described data frame head, reads the described data frame head that described the first storage space is preserved;
The information transmitting unit of data length, the information of the described data length carrying for the data frame head that described data frame head reading unit is read is sent to the application program for the treatment of described Frame;
Data volume storage unit, for determining that at described data frame head storage monitoring unit described data frame head storage unit receives and stored after described data frame head, is stored in the second storage space by the data volume of the described Frame receiving.
According to another aspect of the embodiment of the present invention, a kind of receiving trap of data is also provided, comprising:
The information receiving unit of data length, for receive that dma controller sends for characterizing the information of data length of the Frame of reception;
Data volume has been stored determining unit, for according to the information of the data length of the information receiving unit reception of described data length, determines whether described dma controller completes the operation of the data volume that receives and store described Frame;
Frame reading unit, determine that described dma controller receives and stored after the data volume of described Frame for having stored determining unit at described data volume, read described dma controller and receive and be kept at the data frame head of described Frame of the first storage space and the described data volume that described dma controller received and be kept at described the second storage space.
Above-mentioned at least one technical scheme providing by the embodiment of the present invention, dma controller is stored in the first storage space by the data frame head of the Frame of reception, this data frame head carries for characterizing the information of data length of the Frame of reception, definite, receive and stored after data frame head, read the data frame head that the first storage space is preserved, and the information of the data length that data frame head is carried is sent to the application program for the treatment of Frame.The information of the data length that application program sends according to dma controller, after determining that operation that dma controller is stored in the second storage space by the data volume of the Frame of reception completes, read the data volume that data frame head that the first storage space preserves and the second storage space are preserved.The technical program compared with prior art, can carry by the data frame head of Frame the information of data length, thereby at dma controller, complete after the reception of data frame head, the information of the data length that the data frame head of reception can be carried is sent to the application program for the treatment of the Frame receiving, thereby this application program can determine whether dma controller completes the reception of Frame according to the information of data length, and receive and stored after the data volume of Frame at definite dma controller, read in the data frame head of the first storage space preservation and the data volume of preserving at the second storage space, thereby dma controller can be supported the reception of the Frame of different data lengths, Frame that application program reads from storage space and the inconsistent problem of Frame of actual transmissions have been avoided, improved the success ratio of application program reading out data.
Other features and advantages of the present invention will be set forth in the following description, and, partly from instructions, become apparent, or understand by implementing the present invention.Object of the present invention and other advantages can be realized and be obtained by specifically noted structure in the instructions write, claims and accompanying drawing.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, is used from explanation the present invention with the embodiment of the present invention one, is not construed as limiting the invention.In the accompanying drawings:
The schematic flow sheet of the reception of a kind of data that Fig. 1 provides for the embodiment of the present invention one;
Definite dma controller that Fig. 2 provides for the embodiment of the present invention one receives and stores the schematic flow sheet that the operation of data volume completes;
The schematic flow sheet of the preferred implementation of the data volume that Fig. 3 preserves for reading of providing of the embodiment of the present invention one data frame head that the first storage space preserves and the second storage space;
The schematic flow sheet of the another preferred implementation of the data volume that Fig. 4 preserves for reading of providing of the embodiment of the present invention one data frame head that the first storage space preserves and the second storage space;
The structural representation of the receiving trap of a kind of data that Fig. 5 provides for the embodiment of the present invention three;
The structural representation of the receiving trap of another data that Fig. 6 provides for the embodiment of the present invention three.
Embodiment
In order to provide the implementation of the success ratio that improves application program reading out data, the embodiment of the present invention provides a kind of method of reseptance, system and device of data, below in conjunction with Figure of description, the preferred embodiments of the present invention are described, be to be understood that, preferred embodiment described herein only, for description and interpretation the present invention, is not intended to limit the present invention.And in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.
In technical scheme provided by the invention, before the associative operation of reception that carries out data, can first to dma controller, carry out initialization, for example, by CPU, according to the data length of the data frame head of Frame, be the first storage space that dma controller divides the data frame head of the Frame that is used in storing received, the storage area that this first storage space provides can mate with the data length of data frame head, also can be greater than the data length of data frame head, in practical application, can distribute accordingly as the case may be; In addition, CPU can also be according to the span of the data length of the data volume of Frame, for dma controller divides the second storage space of the data volume of the Frame that is used in storing received, in the technical program, the data length of the data volume of Frame is unfixed, this data length can arrange flexibly according to the situation of the data of actual transmissions, therefore, CPU can be the second storage space of this data volume of dma controller memory allocated according to the span of the data length of data volume in practical application.
Embodiment mono-
This embodiment mono-provides a kind of method of reseptance of data, the method can be applied in embedded system, by apply the technical program in embedded system, Frame that application program reads from storage space and the inconsistent problem of Frame of actual transmissions can be avoided, thereby the object of the success ratio that improves application program reading out data can be reached.
Fig. 1 shows the schematic flow sheet of the reception of a kind of data that the embodiment of the present invention one provides, and as shown in Figure 1, the receiving course of these data, mainly comprises the following steps:
Step 101, dma controller are stored in the first storage space by the data frame head of the Frame of reception, and wherein, data frame head carries the information for the data length of characterization data frame.
In this step 101, data length corresponding to information that is used for the data length of characterization data frame, the data length of the data frame head being comprised by Frame and the data length of the data volume that Frame comprises form, wherein, the data length of data frame head is predefined, the data length of data volume can arrange accordingly according to the concrete condition of the data of transmission, and the data length of this data volume is unfixing.
Step 102, dma controller receive and have stored after the data frame head of reception definite, read the data frame head that the first storage space is preserved, and the data volume of the Frame of reception is stored in to the second storage space.
In this step 102, dma controller receives and has stored after the data frame head of reception definite, can be by producing the mode of interrupt request, the data frame head that is read storage by interrupt service routine to the first storage space is with the information of the data length that obtains this data frame head and carry.In addition, the technical program does not limit for the order of carrying out the operation of " reading the data frame head that the first storage space is preserved " and " data volume of the Frame of reception is stored in to the second storage space ", be that aforesaid operations can be according to actual applied environment, carry out simultaneously, or carry out successively as required, repeat no more herein.The data volume of the described Frame in this programme is the data except data frame head in Frame.
The information of the data length that step 103, dma controller carry the data frame head reading is sent to the application program for the treatment of Frame.
In this step 103, in practical application, description that can be based in step 102, interrupt service routine reads in after the data frame head of storing in the first storage space, the information of the data length that the data frame head reading is carried is sent to application program, by application program, carry out follow-up operation, so far, end interrupt service routine is processed the operation of carrying out with end interrupt.In practical application, step 102 and step 103 are except the mode reading and saving of adopt to interrupt processing is at the data frame head of the first storage space and the information of the data length carrying in data frame head is sent to application program, can also or require according to the concrete condition of applied environment to adopt other modes to operate accordingly, herein, repeat no longer one by one.In this programme, can be according to the dma controller that produces interrupt request, also can realize according to the actual requirements the technical scheme of the information of the data length that corresponding reading and saving carries at the data frame head of the first storage space, in sending data frame head, for ease of describing, this programme is following carries out follow-up description by take DMA control as example.
The information of the data length that step 104, application program send according to dma controller, determines that dma controller receives and stored after data volume, reads the data frame head of the first storage space preservation and the data volume that the second storage space is preserved.
In this step 104, application program is in the information of the data length sending according to dma controller, judge when whether dma controller completes the operation that receives and store data volume, message transmission rate in the time of can be in conjunction with dma controller receiving data frames is carried out, for example, the result that the number of the bit that the data length of data volume is comprised and message transmission rate multiply each other is defined as dma controller and the data volume of the Frame of reception is stored in to the operation duration of the second storage space, in practical application, also can be in conjunction with applied environment, on the basis of the duration of determining, increase the duration of extra setting, fully to guarantee that Frame is received and to have stored, this extra duration can be generally the 5%-10% of the duration determined, in practical application, this ratio can arrange as the case may be flexibly.After this duration, can determine that the operation that dma controller is stored in the second storage space by the data volume of the Frame of reception completes.In addition, according to the needs of applied environment, at definite dma controller, receive and stored after data volume, can read the data frame head of the first storage space preservation and the data volume that the second storage space is preserved, also can directly read the data volume that the second storage space is preserved, directly obtain the data of Frame except data frame head.
So far, the flow process of the reception of data finishes.
In flow process corresponding to Fig. 1, can carry by the data frame head of Frame the information of data length, thereby at dma controller, complete after the reception of data frame head, the information of the data length that the data frame head of reception can be carried is sent to the application program for the treatment of the Frame receiving, thereby this application program can determine whether dma controller completes the reception of Frame according to the information of data length, and receive and stored after the data volume of Frame at definite dma controller, read in the data frame head of the first storage space preservation and the data volume of preserving at the second storage space, thereby dma controller can be supported the reception of the Frame of different data lengths, Frame that application program reads from storage space and the inconsistent problem of Frame of actual transmissions have been avoided, improved the success ratio of application program reading out data.
In the step 102 comprising in flow process corresponding to Fig. 1, at dma controller, definite, receive and stored after the data frame head of reception, read in the data frame head of the first storage space preservation, the technical program determines that for dma controller the operation of the data frame head that receives and stored reception provides several preferential embodiments, specific as follows:
When storage area size corresponding to the first storage space of the data frame head for store frames of data mated with the data length of the data frame head of Frame, dma controller can determine whether to receive and stored the data frame head of reception by monitoring the occupied situation of storage area that the first storage space is corresponding, for example, after dma controller monitors storage area that the first storage space is corresponding and all taken by data (the data frame head of the Frame receiving), determine and receive and stored data frame head;
When the storage area corresponding to the first storage space of the data frame head for store frames of data is greater than the data length of data frame head of Frame, dma controller can be when monitoring storage area that the first storage space is corresponding and mated by the data length of data (the data frame head of the Frame receiving) size taking and the data frame head of preserving in advance, definitely receives and stored described data frame head.
In the step 104 comprising in flow process corresponding to Fig. 1, the information of the data length sending according to dma controller in application program, determine that dma controller receives and stored after data volume, read in the data frame head of the first storage space preservation and the data volume of the second storage space preservation, the information of the data length that application program sends according to dma controller, determine when operation that dma controller received and stored data volume completes, application program can be according to the data length of the data frame head of data length corresponding to the information of data length and Frame, determine the data length of the data volume of Frame, and then, determine the duration of dma controller data volume of the Frame of storing received in the second storage space, particularly, a kind of definite dma controller that Fig. 2 shows the present embodiment one to be provided receives and stores the schematic flow sheet that the operation of data volume completes, as figure, this determines that dma controller receives and store the process that the operation of data volume completes, mainly comprise the following steps:
The difference of the data length that the information of the data length that step 201, application program send DMA interrupt handling routine is corresponding and the data length of data frame head, is defined as the data length of data volume.
In this step 202, application program can be in the situation that message transmission rate during clear and definite dma controller receiving data frames, according to the data length of data volume, determine dma controller the data volume of the data length of determining receiving is stored in to the duration that the second storage space needs, particularly, can be with reference to the associated description in above-mentioned steps 104.
In this step 203, based on application program, receive the information that dma controller sends data length, and after receiving the information of data length, perform step 201 and the duration of step 202, the duration of the Frame of dma controller reception storing received is negligible relatively, therefore, application program can start timing from receiving the time of the information of the data length that dma controller sends, and enter dormant state, after the duration through determining, application program is waken up and determines that the operation that dma controller is stored in the second storage space by the data volume of the Frame of reception completes, or, directly from determining the time that dma controller is stored in by the data volume of the data length of determining receiving the duration that the second storage space needs, start timing, and enter dormant state, after the duration through determining, application program is waken up and determines that the operation that dma controller is stored in the second storage space by the data volume of the Frame of reception completes.
So far, determine that dma controller receives and stores the flow process that the operation of data volume completes and finishes.
Based on above-mentioned, be respectively used to the feature that the data frame head of store frames of data and the first storage space of data volume and the second storage space are assigned with Shi position, " reading the data frame head of the first storage space preservation and the data volume that the second storage space is preserved " in the step 104 that the technical program comprises for the corresponding flow process of Fig. 1, several preferred implementations are provided, specific as follows:
Preferred implementation one
In this preferred implementation one, the storage area that storage area that the first storage space is corresponding is corresponding with the second storage space is adjacent, and after the storage area that the second storage space is corresponding is positioned at the storage area that the first storage space is corresponding, to should the first storage space and the feature of the position of the second storage space, the application program that Fig. 3 shows the embodiment of the present invention one to be provided reads the data frame head of the first storage space preservation and the schematic flow sheet of the data volume that the second storage space is preserved, as shown in Figure 3, the data frame head of this reading and saving and the process of data volume, mainly comprise the following steps:
In this step 301, after being positioned at the storage area storage area adjacent and that the second storage space is corresponding of the secondth storage space the storage area that the first storage space is corresponding based on the empty corresponding storage area of the first storage, be that the first storage space of CPU distribution and the storage area of the second storage space are continuous, dma controller is in continuous storage area after save data, if desired the data of reading and saving, generally determine the start address of the address of this continuous storage area, determine the start address of the address of the first storage space.If only need to read the data volume of the Frame of storing in the second storage space, start address that can be using after amount of physical memory corresponding to the first storage space and the address of the storage space adjacent with this amount of physical memory as the second storage space.
The information of the data length that step 302, application program send according to dma controller, the start address since the address of the first storage space, reads the data of the data length of determining as data frame head and the data volume of Frame.
In this step 302, application program is since the start address of the address of the first storage space, read the corresponding data length consistent data of information of the data length sending with dma controller, the Frame of these data that read for being formed by data frame head and data volume.If only need to read the data volume of the Frame of storing in the second storage space, the start address of the second storage space of directly determining from step 301 starts the data that reading out data length is consistent with the data length of the data volume of Frame, as the data volume of Frame.
So far, the flow process that reads the data frame head of the first storage space preservation and the data volume of the second storage space preservation finishes.
Preferred implementation two
In this preferred implementation two, the storage area that storage area that the first storage space is corresponding is corresponding with the second storage space is non-adjacent, to should the first storage space and the feature of the position of the second storage space, the application program that Fig. 4 shows the embodiment of the present invention one to be provided reads the data frame head of the first storage space preservation and the schematic flow sheet of the data volume that the second storage space is preserved, as shown in Figure 4, the data frame head of this reading and saving and the process of data volume, mainly comprise the following steps:
Step 401, application program are determined the address of the first storage space and the address of the second storage space.
Step 402, application program are according to the data length of the data frame head of Frame, from the storage area reading out data length data consistent with the data length of data frame head corresponding to the address of the first storage space, as the data frame head of Frame.
In this step 402, during the application program storage area reading out data corresponding from the address of the first storage space, can be according to the address of the first storage space, since the initial memory address reading out data length of storage area corresponding to the address of the first storage space data consistent with the data length of data frame head.
Step 403, application program are according to the data length of the data volume of Frame, from the storage area reading out data length data consistent with the data length of data volume corresponding to the address of the second storage space, as the data volume of Frame.
In this step 403, during the application program storage area reading out data corresponding from the address of the second storage space, can start the data that reading out data length is consistent with the data length of data volume according to the initial memory address of storage area corresponding to the ，Cong Gai address, address of the second storage space.If only need to read the data volume of the Frame of storing in the second storage space, can in step 401, determine the address of the second storage space, then carry out this step 403.If desired read complete Frame, the execution sequence of this step 403 and step 402, can carry out flexibly according to actual conditions, be not construed as limiting herein, for example, can perform step 402 and step 403 simultaneously, or, in execution step 403 rear execution steps 402, or, perform step 402 rear execution steps 403.
So far, the flow process that reads the data frame head of the first storage space preservation and the data volume of the second storage space preservation finishes.
Embodiment bis-
This embodiment bis-provides a kind of receiving system of data, this system can be applied in embedded system, by apply the technical program in embedded system, Frame that application program reads from storage space and the inconsistent problem of Frame of actual transmissions can be avoided, thereby the object of the success ratio that improves application program reading out data can be reached.
The receiving system of the data that the present embodiment two provides, comprises dma controller and application program, wherein:
Dma controller, for the data frame head of the Frame of reception is stored in to the first storage space, data frame head carries the information for the data length of characterization data frame, definite, receive and stored after data frame head, read the data frame head that the first storage space is preserved, and the information of the data length that data frame head is carried is sent to the application program for the treatment of Frame, and, definite, receive and stored after data frame head, the data volume of the Frame of reception is stored in to the second storage space;
Application program, for according to the information of the data length of dma controller transmission, determines that dma controller receives and stored after data volume, reads the data frame head of the first storage space preservation and the data volume that the second storage space is preserved.
Further, the dma controller that the present embodiment two provides and application program also have following functions, specific as follows:
Dma controller is when determining the operation that receives and stored data frame head, if the size for storage area corresponding to the first storage space of store frames of data head is mated with the data length of data frame head, can, after monitoring storage area that the first storage space is corresponding and all being taken by data frame head, determine and receive and stored data frame head; When if the size of the storage area that the first storage space is corresponding is greater than the data length of data frame head,, when the data length that monitors the storage area size being taken by data frame head and the data frame head of preserving in advance that the first storage space is corresponding mates, determine and receive and stored according to frame head.
The information of the data length that application program sends according to dma controller, when determining that dma controller receives and stored the operation of data volume, can be by the difference of the data length of data length corresponding to the information of data length and data frame head, be defined as the data length of data volume, then according to the data length of data volume, determine that dma controller is stored in by the data volume of reception the duration that the second storage space needs, and after the duration through determining, determine that dma controller receives and stored data volume.
When application program reads the data frame head of the first storage space preservation and the data volume of the second storage space preservation, can carry out corresponding read operation according to the feature of the position of the first storage space and the second storage space, for example, if the storage area that the storage area that the first storage space is corresponding is corresponding with the second storage space is adjacent, and after the storage area that the second storage space is corresponding is positioned at the storage area that the first storage space is corresponding, application program can be after the start address of address of determining the first storage space, the information of the data length sending according to dma controller, start address since the address of the first storage space, data frame head and data volume using the data of the data length with dma controller transmission reading as Frame, if the storage area that the storage area that the first storage space is corresponding is corresponding with the second storage space is non-adjacent, application program can be behind definite address of the first storage space and the address of the second storage space, according to the data length of the data frame head of Frame, by the data of the data length of storage area reading out data frame head corresponding to the address from the first storage space, data frame head as Frame, and according to the data length of the data volume of Frame, by the data of the data length of storage area reading out data body corresponding to the address from the second storage space, data volume as Frame.
Embodiment tri-
This embodiment tri-provides a kind of receiving trap of data, this device can be applied in embedded system, further, this device can be applied in dma controller, by apply the technical program in embedded system, Frame that application program reads from storage space and the inconsistent problem of Frame of actual transmissions can be avoided, thereby the object of the success ratio that improves application program reading out data can be reached.
Fig. 5 shows the structural representation of the receiving trap of a kind of data that the embodiment of the present invention two provides, and as shown in Figure 5, this device comprises:
Data frame head storage unit 501, for the data frame head of the Frame of reception is stored in to the first storage space, data frame head carries the information for the data length of characterization data frame;
Whether data frame head storage monitoring unit 502, receive and stored data frame head for specified data frame head storage unit 501;
Data frame head reading unit 503, for receiving and stored after data frame head in data frame head storage monitoring unit 502 specified data frame head storage unit 501, reads the data frame head that the first storage space is preserved;
The information transmitting unit 504 of data length, the information of the data length carrying for the data frame head that data frame head reading unit 503 is read is sent to the application program for the treatment of Frame;
Data volume storage unit 505, for receiving and stored after data frame head in data frame head storage monitoring unit 502 specified data frame head storage unit 501, is stored in the second storage space by the data volume of the Frame of reception.
In the preferred implementation that the embodiment of the present invention three provides, the data frame head storage monitoring unit 502 that Fig. 5 shown device comprises, specifically for after monitoring storage area that the first storage space is corresponding and all being taken by data frame head, specified data frame head storage unit receives and has stored data frame head, wherein, the storage area size that the first storage space is corresponding is mated with the data length of data frame head; Or when the data length that monitors the storage area size being taken by data frame head and the data frame head of preserving in advance that the first storage space is corresponding mates, specified data frame head storage unit receives and has stored data frame head.
Fig. 6 shows the receiving trap of another data that the present embodiment three provides, and this device can be applied in embedded system, and further, this device can be applied in the equipment for the treatment of the data after receiving and preserving, and as shown in Figure 6, this device comprises:
The information receiving unit 601 of data length, data volume have been stored determining unit 602 and Frame reading unit 603, wherein:
The information receiving unit 601 of data length, for receive that direct memory access dma controller sends for characterizing the information of data length of the Frame of reception;
Data volume has been stored determining unit 602, for according to the information of the data length of information receiving unit 601 receptions of data length, determines whether dma controller completes the operation of the data volume of reception store frames of data;
In the preferred implementation that the embodiment of the present invention three provides, the data volume that Fig. 6 shown device comprises has been stored determining unit 602, specifically for by the difference of the data length of data length corresponding to the information of data length and data frame head, be defined as the data length of data volume; According to the data length of data volume, determine that dma controller is stored in by the data volume of the data length of reception the duration that the second storage space needs; And after duration, determine that dma controller receives and stored data volume.
In the preferred implementation that the embodiment of the present invention three provides, the Frame reading unit 603 that Fig. 6 shown device comprises, if after being positioned at specifically for storage area corresponding to the first storage space storage area corresponding with the second storage space storage area adjacent and that the second storage space is corresponding the storage area that the first storage space is corresponding, determine the start address of the address of the first storage space; And the information of the data length sending according to dma controller, since the start address of the address of the first storage space, the data of reading out data length are as data frame head and the data volume of Frame.
In the preferred implementation that the embodiment of the present invention three provides, the Frame reading unit 603 that Fig. 6 shown device comprises, if non-adjacent specifically for the storage area that storage area corresponding to the first storage space is corresponding with the second storage space, determine the address of the first storage space and the address of the second storage space; According to the data length of the data frame head of Frame, from the data of the data length of storage area reading out data frame head corresponding to the address of the first storage space, as the data frame head of Frame; And according to the data length of the data volume of Frame, from the data of the data length of storage area reading out data body corresponding to the address of the second storage space, as the data volume of Frame.
Should be appreciated that the only logical partitioning for carrying out according to the function of this device realization of unit that above device comprises, in practical application, can carry out stack or the fractionation of said units.And the method for reseptance flow process of a kind of data that the function that the device that this embodiment provides is realized provides with above-described embodiment is corresponding one by one, the more detailed treatment scheme realizing for this device, in said method embodiment, be described in detail, be not described in detail herein.
And the receiving trap of the data in the present embodiment three also has the functional module that can realize embodiment mono-and embodiment bis-schemes, repeats no more herein.
Although described the application's preferred embodiment, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the application's scope.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (19)
1. a method of reseptance for data, is characterized in that, comprising:
Direct memory access dma controller is stored in the first storage space by the data frame head of the Frame of reception, described data frame head carries for characterizing the information of the data length of described Frame, definite, receive and stored after described data frame head, read the described data frame head that described the first storage space is preserved, and the information of the described data length that described data frame head is carried is sent to the application program for the treatment of described Frame, and, definite, receive and stored after described data frame head, the data volume of the described Frame receiving is stored in to the second storage space,
The information of the described data length that described application program sends according to described dma controller, determine that described dma controller receives and stored after described data volume, read the described data frame head of described the first storage space preservation and the described data volume that described the second storage space is preserved.
2. the method for claim 1, is characterized in that, dma controller is definite receives and stored described data frame head, comprising:
Dma controller is after monitoring storage area that described the first storage space is corresponding and all being taken by described data frame head, determine and receive and stored described data frame head, wherein, the storage area size that described the first storage space is corresponding is mated with the data length of described data frame head; Or
Dma controller, when the data length that monitors the storage area size being taken by described data frame head and the described data frame head of preserving in advance that described the first storage space is corresponding mates, is determined and is received and stored described data frame head.
3. the method for claim 1, is characterized in that, the information of the described data length that described application program sends according to described dma controller determines that described dma controller receives and stored described data volume, comprising:
Described application program, by the difference of the data length of data length corresponding to the information of described data length and described data frame head, is defined as the data length of described data volume;
According to the data length of described data volume, determine that described dma controller is stored in by the data volume of the described data length receiving the duration that the second storage space needs; And
After described duration, determine that described dma controller receives and stored described data volume.
4. the method for claim 1, it is characterized in that, after the storage area storage area storage area adjacent and that described the second storage space is corresponding corresponding with described the second storage space that described the first storage space is corresponding is positioned at the storage area that described the first storage space is corresponding;
Application program reads the described data frame head of described the first storage space preservation and the described data volume that described the second storage space is preserved, and comprising:
Application program is determined the start address of the address of described the first storage space; And
The information of the data length sending according to described dma controller, from the start address of the address of described the first storage space, reads the data of described data length as data frame head and the data volume of described Frame.
5. the method for claim 1, is characterized in that, the storage area that storage area that described the first storage space is corresponding is corresponding with described the second storage space is non-adjacent;
Application program reads the described data frame head of described the first storage space preservation and the described data volume that described the second storage space is preserved, and comprising:
Application program is determined the address of described the first storage space and the address of described the second storage space;
According to the data length of the data frame head of described Frame, from storage area corresponding to the address of described the first storage space, read the data of the data length of described data frame head, as the data frame head of described Frame; And
According to the data length of the data volume of described Frame, from storage area corresponding to the address of described the second storage space, read the data of the data length of described data volume, as the data volume of described Frame.
6. a method of reseptance for data, is characterized in that, comprising:
Direct memory access dma controller is stored in the first storage space by the data frame head of the Frame of reception, and described data frame head carries for characterizing the information of the data length of described Frame;
Definite, receive and stored after described data frame head, read the described data frame head that described the first storage space is preserved, and the information of the described data length that described data frame head is carried is sent to the application program for the treatment of described Frame; And
Definite, receive and stored after described data frame head, the data volume of the described Frame receiving is stored in to the second storage space.
7. method as claimed in claim 6, is characterized in that, dma controller is definite receives and stored described data frame head, comprising:
Dma controller is after monitoring storage area that described the first storage space is corresponding and all being taken by described data frame head, determine and receive and stored described data frame head, wherein, the storage area size that described the first storage space is corresponding is mated with the data length of described data frame head; Or
Dma controller, when the data length that monitors the storage area size being taken by described data frame head and the described data frame head of preserving in advance that described the first storage space is corresponding mates, is determined and is received and stored described data frame head.
8. a method of reseptance for data, is characterized in that, comprising:
Application program receive that direct memory access dma controller sends for characterizing the information of data length of the Frame of reception;
According to the information of described data length, determine that described dma controller receives and stored after the data volume of described Frame, read described dma controller and receive and be kept at the data frame head of described Frame of the first storage space and the described data volume that described dma controller received and be kept at described the second storage space.
9. method as claimed in claim 8, is characterized in that, described application program, according to the information of described data length, determines that described dma controller receives and stored described data volume, comprising:
Described application program, by the difference of the data length of data length corresponding to the information of described data length and described data frame head, is defined as the data length of described data volume;
According to the data length of described data volume, determine that described dma controller is stored in by the data volume of the described data length receiving the duration that the second storage space needs; And
After described duration, determine that described dma controller receives and stored described data volume.
10. method as claimed in claim 8, it is characterized in that, after the storage area storage area storage area adjacent and that described the second storage space is corresponding corresponding with described the second storage space that described the first storage space is corresponding is positioned at the storage area that described the first storage space is corresponding;
Application program reads described dma controller and receives and be kept at the data frame head of described Frame of the first storage space and the described data volume that described dma controller received and be kept at described the second storage space, comprising:
Application program is determined the start address of the address of described the first storage space; And
The information of the data length sending according to described dma controller, from the start address of the address of described the first storage space, reads the data of described data length as data frame head and the data volume of described Frame.
11. methods as claimed in claim 8, is characterized in that, the storage area that storage area that described the first storage space is corresponding is corresponding with described the second storage space is non-adjacent;
Application program reads described dma controller and receives and be kept at the data frame head of described Frame of the first storage space and the described data volume that described dma controller received and be kept at described the second storage space, comprising:
Application program is determined the address of described the first storage space and the address of described the second storage space;
According to the data length of the data frame head of described Frame, from storage area corresponding to the address of described the first storage space, read the data of the data length of described data frame head, as the data frame head of described Frame; And
According to the data length of the data volume of described Frame, from storage area corresponding to the address of described the second storage space, read the data of the data length of described data volume, as the data volume of described Frame.
The receiving system of 12. 1 kinds of data, is characterized in that, comprising:
Direct memory access dma controller and application program, wherein:
Described dma controller, for the data frame head of the Frame of reception is stored in to the first storage space, described data frame head carries for characterizing the information of the data length of described Frame, definite, receive and stored after described data frame head, read the described data frame head that described the first storage space is preserved, and the information of the described data length that described data frame head is carried is sent to the application program for the treatment of described Frame, and, definite, receive and stored after described data frame head, the data volume of the described Frame receiving is stored in to the second storage space,
Described application program, be used for according to the information of the described data length of described dma controller transmission, determine that described dma controller receives and stored after described data volume, read the described data frame head of described the first storage space preservation and the described data volume that described the second storage space is preserved.
The receiving trap of 13. 1 kinds of data, is characterized in that, comprising:
Data frame head storage unit, for the data frame head of the Frame of reception is stored in to the first storage space, described data frame head carries for characterizing the information of the data length of described Frame;
Data frame head storage monitoring unit, for determining whether described data frame head storage unit receives and stored described data frame head;
Data frame head reading unit, for determining that at described data frame head storage monitoring unit described data frame head storage unit receives and stored after described data frame head, reads the described data frame head that described the first storage space is preserved;
The information transmitting unit of data length, the information of the described data length carrying for the data frame head that described data frame head reading unit is read is sent to the application program for the treatment of described Frame;
Data volume storage unit, for determining that at described data frame head storage monitoring unit described data frame head storage unit receives and stored after described data frame head, is stored in the second storage space by the data volume of the described Frame receiving.
14. devices as claimed in claim 13, it is characterized in that, described data frame head storage monitoring unit, specifically for after monitoring storage area that described the first storage space is corresponding and all being taken by described data frame head, determine that described data frame head storage unit receives and stored described data frame head, wherein, the storage area size that described the first storage space is corresponding is mated with the data length of described data frame head; Or when the data length that monitors the storage area size being taken by described data frame head and the described data frame head of preserving in advance that described the first storage space is corresponding mates, determine that described data frame head storage unit receives and stored described data frame head.
15. 1 kinds of direct memory access dma controllers, is characterized in that, comprise the receiving trap of the data described in claim 13 or claim 14.
The receiving trap of 16. 1 kinds of data, is characterized in that, comprising:
The information receiving unit of data length, for receive that direct memory access dma controller sends for characterizing the information of data length of the Frame of reception;
Data volume has been stored determining unit, for according to the information of the data length of the information receiving unit reception of described data length, determines whether described dma controller completes the operation of the data volume that receives and store described Frame;
Frame reading unit, determine that described dma controller receives and stored after the data volume of described Frame for having stored determining unit at described data volume, read described dma controller and receive and be kept at the data frame head of described Frame of the first storage space and the described data volume that described dma controller received and be kept at described the second storage space.
17. devices as claimed in claim 16, it is characterized in that, described data volume has been stored determining unit, specifically for by the difference of the data length of data length corresponding to the information of described data length and described data frame head, is defined as the data length of described data volume; According to the data length of described data volume, determine that described dma controller is stored in by the data volume of the described data length receiving the duration that the second storage space needs; And after described duration, determine that described dma controller receives and stored described data volume.
18. devices as claimed in claim 16, it is characterized in that, described Frame reading unit, if after being positioned at specifically for storage area corresponding to described the first storage space storage area corresponding with described the second storage space storage area adjacent and that described the second storage space is corresponding the storage area that described the first storage space is corresponding, determine the start address of the address of described the first storage space; And the information of the data length sending according to described dma controller, from the start address of the address of described the first storage space, read the data of described data length as data frame head and the data volume of described Frame.
19. devices as claimed in claim 16, it is characterized in that, described Frame reading unit, if non-adjacent specifically for the storage area that storage area corresponding to described the first storage space is corresponding with described the second storage space, determine the address of described the first storage space and the address of described the second storage space; According to the data length of the data frame head of described Frame, from storage area corresponding to the address of described the first storage space, read the data of the data length of described data frame head, as the data frame head of described Frame; And according to the data length of the data volume of described Frame, from storage area corresponding to the address of described the second storage space, read the data of the data length of described data volume, as the data volume of described Frame.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347957A (en) * | 2018-10-22 | 2019-02-15 | 北京广利核系统工程有限公司 | Communication data memory management method, device and looped network board based on FPGA |
| CN111405040A (en) * | 2020-03-16 | 2020-07-10 | 北京星际荣耀空间科技有限公司 | Real-time data processing method, device and equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101158930A (en) * | 2007-11-19 | 2008-04-09 | 中兴通讯股份有限公司 | Method and device for external controlling DMA controller |
| CN101263464A (en) * | 2005-09-16 | 2008-09-10 | 英特尔公司 | Parallel processing of frame based data transfers |
| CN101556564A (en) * | 2008-04-11 | 2009-10-14 | 联芯科技有限公司 | Data receiving/sending method and device |
| CN101636721A (en) * | 2006-11-28 | 2010-01-27 | Lm爱立信电话有限公司 | Be used to handle the DMAC of unknown lengths transmission |
-
2012
- 2012-06-26 CN CN201210214211.6A patent/CN103514126B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101263464A (en) * | 2005-09-16 | 2008-09-10 | 英特尔公司 | Parallel processing of frame based data transfers |
| CN101636721A (en) * | 2006-11-28 | 2010-01-27 | Lm爱立信电话有限公司 | Be used to handle the DMAC of unknown lengths transmission |
| CN101158930A (en) * | 2007-11-19 | 2008-04-09 | 中兴通讯股份有限公司 | Method and device for external controlling DMA controller |
| CN101556564A (en) * | 2008-04-11 | 2009-10-14 | 联芯科技有限公司 | Data receiving/sending method and device |
Non-Patent Citations (1)
| Title |
|---|
| 陈学松: "《深入Linux设备驱动程序内核机制》", 31 January 2012 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347957A (en) * | 2018-10-22 | 2019-02-15 | 北京广利核系统工程有限公司 | Communication data memory management method, device and looped network board based on FPGA |
| CN111405040A (en) * | 2020-03-16 | 2020-07-10 | 北京星际荣耀空间科技有限公司 | Real-time data processing method, device and equipment |
| CN111405040B (en) * | 2020-03-16 | 2021-05-07 | 北京星际荣耀空间科技股份有限公司 | Real-time data processing method, device and equipment |
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|---|---|
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