CN102981986A - System and method of data interaction - Google Patents
System and method of data interaction Download PDFInfo
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- CN102981986A CN102981986A CN2012104345100A CN201210434510A CN102981986A CN 102981986 A CN102981986 A CN 102981986A CN 2012104345100 A CN2012104345100 A CN 2012104345100A CN 201210434510 A CN201210434510 A CN 201210434510A CN 102981986 A CN102981986 A CN 102981986A
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Abstract
The invention discloses a system and a method of data interaction, and is used for controlling an external device and a computer to carry out data interaction. The method of the data interaction comprise the follow procedures of closing a data channel interrupt and stopping a direct memory access (DMA) transmission in the computer;applying for a temporary storage area in the computer, and setting a pointer pointing to an Rx buffer to point to the temporary storage area;opening the data channel interrupt and the DMA transmission; controlling the external device and the computer to carry out data interaction through the DMA transmission. The system and the method of data interaction can use the temporary storage area to replace the Rx buffer, and therefore can achieve carrying out data interaction between the external device and the computer by replacing a hardware stream control mode with a lesser data transmission quantity, and can improve transmission efficiency, at the same time correct transmission can be guaranteed.
Description
Technical field
The present invention relates to a kind of data interaction system and method, particularly relate to the enough scratchpad area (SPA)s of a kind of energy and replace Rx buffer to realize data interaction system and a kind of data interactive method that utilizes this data interaction system to realize of the alternative hardware Flow Control of data.
Background technology
Present external unit and computing machine carry out data interaction dual mode, without Flow Control and hardware flow control.Wherein high without Flow Control mode data transfer efficient, but can not guarantee to transmit accurately, and the hardware flow control mode can guarantee correct transmission, but transfer efficiency is relatively low.Therefore when data interaction, adopt which kind of mode all can not guarantee simultaneously accurate and have high-transmission efficient, and all adopt the correctness that just can't guarantee the transmission of data without the Flow Control mode when externally equipment and computing machine carry out than the data transmission under the small data quantity.
Summary of the invention
The technical problem to be solved in the present invention is in order to overcome the defective of the correctness that can't guarantee the data transmitted when prior art peripheral equipment and computing machine carry out than the data interaction under the small data quantity, to provide the enough scratchpad area (SPA)s of a kind of energy to replace Rx(to receive) the buffer(buffer register) realize data interaction system and a kind of data interactive method that utilizes this data interaction system to realize of the hardware flow control of data.
The present invention solves above-mentioned technical matters by following technical proposals:
The invention provides a kind of data interactive method, its characteristics are that it is used for control one external unit and a computing machine carries out data interaction, and this data interactive method may further comprise the steps:
S
1, in this computing machine, close data channel and interrupt and stop the DMA(direct memory access) transmission;
S
2, in this computing machine application one scratchpad area (SPA), and the pointer that points to Rx buffer is set to point to this scratchpad area (SPA);
S
3, open that this data channel is interrupted and the DMA transmission;
S
4, control this external unit and this computing machine and carry out data interaction by the DMA transmission.
Wherein, by at step S
1In close data channel and interrupt, just can prevent from receiving MSG_ID_UART_READY_TO_READ_IND message (belonging to the message that drives layer), and then just can prevent that also bottom has information reporting with this scratchpad area (SPA) replacement Rx buffer the time.And step S
2This scratchpad area (SPA) of middle application, memory capacity is changeable, can come stepped application according to computer system performance, as can first to file 100KB(kilobyte), if the unsuccessful 90KB etc. that then applies for, by that analogy.
And, be set to point to this scratchpad area (SPA) by the pointer that originally pointed to Rx buffer, just realized substituting Rx buffer with this scratchpad area (SPA), and then also just realized under than the small data transmission amount carrying out data interaction between this external unit and this computing machine in alternative hardware Flow Control mode, and can adopt the DMA transmission to carry out data transmit-receive when mutual, the known technology that this belongs to this area just repeats no more at this, thereby has also promoted transfer efficiency when guaranteeing correct transmission.
Preferably, step S
2In the span of memory capacity of this scratchpad area (SPA) be 50-100KB.
Preferably, step S
4In after data interaction is finished, also this pointer is set to again point to Rxbuffer.
The present invention also provides a kind of data interaction system, and its characteristics are that it is used for control one external unit and a computing machine carries out data interaction, and this data interaction system comprises that a control module, a pointer arrange module and a data interaction module;
This control module is used at first closing data channel at this computing machine and interrupts and stop DMA transmitting, and arrange at this pointer that module is applied for a scratchpad area (SPA) in this computing machine, after the pointer that points to Rx buffer is set to point to this scratchpad area (SPA), open this data channel interruption and DMA transmission, this data interaction module is used for this external unit of control and this computing machine carries out data interaction by the DMA transmission again.
Preferably, the span of memory capacity of this scratchpad area (SPA) of module application is set is 50-100KB to this pointer.
Preferably, this pointer arranges module and is used for also that this pointer is set to again point to Rx buffer after this external unit and this computing machine are finished data interaction.
Positive progressive effect of the present invention is: the present invention can substitute Rx buffer in enough scratchpad area (SPA)s, and then also just can be implemented in than carrying out data interaction between external unit and the computing machine in alternative hardware Flow Control mode under the small data transmission amount, when guaranteeing correct transmission, also promoted transfer efficiency.
Description of drawings
Fig. 1 is the structural drawing of the data interaction system of a preferred embodiment of the present invention.
Fig. 2 is the process flow diagram of the data interactive method of a preferred embodiment of the present invention.
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.
As shown in Figure 1, data interaction system of the present invention comprises that a control module 1, a pointer arrange module 2 and a data interaction module 3.
Data interaction system of the present invention can be controlled the data interaction between external unit and the computing machine, and at first this control module 1 can be closed the data channel interruption and be stopped the DMA transmission in this computing machine, then, this pointer arranges 2 application one scratchpad area (SPA)s in this computing machine of module, and the pointer that points to Rx buffer is set to point to this scratchpad area (SPA), this control module 1 can be opened this data channel again and interrupted and open the DMA transmission afterwards, and this data interaction module 3 is just controlled this external unit and transmitted by DMA with this computing machine and carry out data interaction at last.
Interrupt by closing data channel, just can prevent from receiving MSG_ID_UART_READY_TO_READ_IND message, and then just can prevent that also bottom has information reporting when replacing Rx buffer with this scratchpad area (SPA).And that this pointer arranges the memory capacity of this scratchpad area (SPA) of module 2 application is changeable, the span of memory capacity can be arranged on 50-100KB in the present embodiment, specifically can come stepped application according to computer system performance, as can first to file 100KB, if the unsuccessful 90KB etc. that then applies for, by that analogy.
And, be set to point to this scratchpad area (SPA) by the pointer that originally pointed to Rx buffer, just realized substituting Rx buffer with this scratchpad area (SPA), and then also just realized under than the small data transmission amount carrying out data interaction between this external unit and this computing machine in alternative hardware Flow Control mode, and can adopt the DMA transmission to carry out data transmit-receive when mutual, the known technology that this belongs to this area just repeats no more at this, thereby has also promoted transfer efficiency when guaranteeing correct transmission.
Wherein, this pointer arranges module 2 and can also be set to again point to Rx buffer by this pointer after this external unit and this computing machine are finished data interaction.
As shown in Figure 2, the present invention utilizes the data interactive method of the data interaction system realization of present embodiment may further comprise the steps:
Step 100, in this computing machine, close data channel and interrupt and stop the DMA transmission.
Step 101, in this computing machine application one scratchpad area (SPA), and the pointer that points to Rx buffer is set to point to this scratchpad area (SPA).
Step 102, open that this data channel is interrupted and the DMA transmission;
Step 103, control this external unit and this computing machine and carry out data interaction by the DMA transmission, this pointer was set to again point to Rx buffer, then process ends after data interaction was finished.
Although more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is limited by appended claims.Those skilled in the art can make various changes or modifications to these embodiments under the prerequisite that does not deviate from principle of the present invention and essence, but these changes and modification all fall into protection scope of the present invention.
Claims (6)
1. a data interactive method is characterized in that, it is used for control one external unit and a computing machine carries out data interaction, and this data interactive method may further comprise the steps:
S
1, in this computing machine, close data channel and interrupt and stop the DMA transmission;
S
2, in this computing machine application one scratchpad area (SPA), and the pointer that points to Rx buffer is set to point to this scratchpad area (SPA);
S
3, open that this data channel is interrupted and the DMA transmission;
S
4, control this external unit and this computing machine and carry out data interaction by the DMA transmission.
2. data interactive method as claimed in claim 1 is characterized in that, step S
2In the span of memory capacity of this scratchpad area (SPA) be 50-100KB.
3. data interactive method as claimed in claim 2 is characterized in that, step S
4In after data interaction is finished, also this pointer is set to again point to Rx buffer.
4. a data interaction system is characterized in that, it is used for control one external unit and a computing machine carries out data interaction, and this data interaction system comprises that a control module, a pointer arrange module and a data interaction module;
This control module is used at first closing data channel at this computing machine and interrupts and stop DMA transmitting, and arrange at this pointer that module is applied for a scratchpad area (SPA) in this computing machine, after the pointer that points to Rx buffer is set to point to this scratchpad area (SPA), open this data channel interruption and DMA transmission, this data interaction module is used for this external unit of control and this computing machine carries out data interaction by the DMA transmission again.
5. data interaction system as claimed in claim 4 is characterized in that, the span of memory capacity that this pointer arranges this scratchpad area (SPA) of module application is 50-100KB.
6. data interaction system as claimed in claim 5 is characterized in that, this pointer arranges module and is used for also that this pointer is set to again point to Rx buffer after this external unit and this computing machine are finished data interaction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012104345100A CN102981986A (en) | 2012-11-02 | 2012-11-02 | System and method of data interaction |
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| CN2012104345100A CN102981986A (en) | 2012-11-02 | 2012-11-02 | System and method of data interaction |
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| CN102981986A true CN102981986A (en) | 2013-03-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307159A (en) * | 2018-08-21 | 2019-02-05 | 湖南大学 | A kind of pipe network model alarm method based on water consumption optimal prediction model |
| CN110336869A (en) * | 2019-06-28 | 2019-10-15 | 上海移远通信技术股份有限公司 | The test method and system of data interaction |
Citations (3)
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| US3676846A (en) * | 1968-10-08 | 1972-07-11 | Call A Computer Inc | Message buffering communication system |
| CN101149717A (en) * | 2007-11-16 | 2008-03-26 | 威盛电子股份有限公司 | Computer system and direct RAM access transmission method |
| CN101261611A (en) * | 2008-02-15 | 2008-09-10 | 威盛电子股份有限公司 | Peripheral apparatus data-transmission apparatus and transmission method |
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2012
- 2012-11-02 CN CN2012104345100A patent/CN102981986A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3676846A (en) * | 1968-10-08 | 1972-07-11 | Call A Computer Inc | Message buffering communication system |
| CN101149717A (en) * | 2007-11-16 | 2008-03-26 | 威盛电子股份有限公司 | Computer system and direct RAM access transmission method |
| CN101261611A (en) * | 2008-02-15 | 2008-09-10 | 威盛电子股份有限公司 | Peripheral apparatus data-transmission apparatus and transmission method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307159A (en) * | 2018-08-21 | 2019-02-05 | 湖南大学 | A kind of pipe network model alarm method based on water consumption optimal prediction model |
| CN110336869A (en) * | 2019-06-28 | 2019-10-15 | 上海移远通信技术股份有限公司 | The test method and system of data interaction |
| CN110336869B (en) * | 2019-06-28 | 2022-08-30 | 上海移远通信技术股份有限公司 | Data interaction test method and system |
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Application publication date: 20130320 |