CN104102619B - Method and system of first operating system operating DSP (digital signal processing) of second operating system - Google Patents
Method and system of first operating system operating DSP (digital signal processing) of second operating system Download PDFInfo
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Abstract
The invention discloses a method and a system of a first operating system operating DSP (digital signal processing) of a second operating system. The method comprises the following steps of enabling the first operating system to write a command into a shared-memory buffer, and sending an interruption notice to an ARM processor; after the ARM processor receives the interruption notice, reading the command in the shared-memory buffer, and judging a target DSP sub-core of the DSP which can realize the function of the command, runs under the second operating system and is provided with a plurality of DSP sub-cores; enabling the ARM processor to forward the command into the target DSP sub-core, so as to enable the target DSP sub-core to complete the function. By additionally arranging the ARM processor, the command generated by SDK (software development kit) of the first operating system is forwarded to the DSP under the second operating system through the ARM processor, and the DSP of the second operating system can be controlled by the first operating system, so a video and audio board card of a Centaurus platform can be applied to a Windows operating system.
Description
Technical field
The present invention relates to video communication operational control field, particularly to a kind of first operating system to the second operating system
DSP（Digital Signal Processing, digital signal processing unit）The method and system being operated.
Background technology
Netra is Texas Instrument（TI）A kind of video SOC(system on a chip) released（SoC, System on Chip）, it is by height
All captures of clear multi-channel system, compression, display and control function are integrated on single-chip, and it is integrated with ARM Cortex-
A8 processor, Ti C674x Floating-point DSP, some secondary programmable HD video image coprocessors（HDVICP V2.0）, and
One HD video processing subsystem（HDVPSS, or VPS）.
Centaurus is the platform that Texas Instrument is extended based on Netra, is integrated with the characteristic of Netra, also more focuses on low work(
Consumption design.In Centaurus platform, DSP refers in particular to by VID（HDVICP, programmable HD video image coprocessor）、
C674x（DSP operation processor on Centaurus platform, C674x is industry lowest power consumption Floating-point DSP, is put down based on C64x+
Platform, the speed of service can reach 750MHz）And HD video processing subsystem（HDVPSS, or VPS）At the multinuclear of composition
Reason unit.Wherein, C674x is the DSP operation processor on Centaurus platform, and C674x is lowest power consumption floating-point in industry
DSP, based on C64x+ platform, the speed of service reaches as high as 750MHz.
DVR（Digital Video Recorder, DVR）It is the computer system that audio frequency and video storage is processed, can
Realize long-time recording, the function such as video recording, remote monitoring, the operating system that DVR is typically run is linux.
At present, it is all independent operating linux operating system based on the DVR product of Netra platform, under Linux system, main
DSP is controlled to realize various functions with menu-style.And PC is then belonging to based on the video and audio board of Centaurus platform
A part, if PC run Windows operating system if, then the scheme under Linux system cannot meet demand, and then
Limit application under Windows operating system for the DVR product.
Content of the invention
In view of this, the present invention provides a kind of first operating system that the DSP running on the second operating system is operated
Method and system, and then realize the application under Windows operating system of the video and audio board of Centaurus platform.
The technical scheme of the application is realized in：
A kind of method that first operating system is operated to the DSP running on the second operating system, including：
First operating system sends interrupt notification by order write shared buffer and to arm processor；
After described arm processor receives described interrupt notification, read the described order in described shared buffer, and sentence
Break to realize the function of described order and run under the second operating system the DSP with multiple DSP daughter nucleus in purpose
DSP daughter nucleus；
Described order is forwarded to described purpose DSP daughter nucleus by described arm processor, so that described purpose DSP daughter nucleus completes
Described function.
Further, described first operating system will order write shared buffer simultaneously by the SDK of this first operating system
Send interrupt notification to arm processor.
Further, methods described also includes：
The time-out time of the interrupt notification to be received such as described arm processor setting；
Reach set time-out time when the waiting time of the described interrupt notification to be received such as described arm processor,
And when described arm processor is not received by described interrupt notification, described arm processor inquires about described shared buffer with true
Recognize the new order whether having described SDK write in described shared buffer；
If there is no described new order in described shared buffer, described arm processor continue waiting for receiving new in
Open close know；
If there being described new order in described shared buffer, described arm processor reads in described shared buffer
Described new ordering and judge to realize the purpose DSP daughter nucleus of the function of described new order；Described arm processor will be described
New order is forwarded to described purpose DSP daughter nucleus, so that described purpose DSP daughter nucleus completes described function.
Further, described time-out time is 20ms.
Further, after the described order in reading described shared buffer, judge to realize the function of described order
Before purpose DSP daughter nucleus, also include：
Described order is verified；
If verifying successfully, judge to realize the purpose DSP daughter nucleus of the function of described order；Otherwise, wait SDK again to
Arm processor sends interrupt notification.
Further, described judge to realize the function of described order and run under the second operating system have multiple
Purpose DSP daughter nucleus in the DSP of DSP daughter nucleus, is to forward matrix table to judge to realize the mesh of the function of described order according to order
DSP daughter nucleus, and order execution time and the realization such as purpose DSP daughter nucleus needing feedback.
Further, described order forwards matrix table to include：
_retCoreFlg_：For judging the purpose DSP daughter nucleus of the function of realizing described order；
_recevCoreFlg_：For judging the DSP daughter nucleus of return information；
_wait_：For recording the waiting time of described order, if described order can not be completed within the set time,
Then report mistake；
_bPara_：The parameter of order, for realizing the transmission of command parameter；
_bRetPara_：The feedback parameter of order, for realizing the transmission of order return parameterss；
_buf_：The relief area of order, for placement parameter information；
_retBuf_：The feedback relief area of order, for placing the information such as return parameterss；
_func_：Order the corresponding function pointer realizing function.
Further, described DSP daughter nucleus includes：VID, VPS and C674X.
Further, described DSP is the multi-core DSP in Centaurus platform.
The system that a kind of first operating system is operated to the DSP running on the second operating system, including：
The SDK of the first operating system, sends interrupt notification for by order write shared buffer and to arm processor；
Arm processor, for receiving described interrupt notification, reads the described order in described shared buffer, and judges
Go out to realize the function of described order and run under the second operating system the DSP with multiple DSP daughter nucleus in purpose DSP
Daughter nucleus, and described order is forwarded to described purpose DSP daughter nucleus, so that described purpose DSP daughter nucleus completes described function；And
DSP, runs under the second operating system, has multiple DSP daughter nucleus.
From such scheme as can be seen that first operating system of the present invention is carried out to the DSP running on the second operating system
The method and system of operation, by increasing arm processor between the SDK and the DSP of the second operating system of the first operating system,
Enable the order that the first operating system is sent to be forwarded to described DSP by this arm processor, and then may be implemented in first
Controlling so that the video and audio board energy of Centaurus platform to described DSP under operating system such as Windows operating system
Enough it is applied to Windows operating system.
Brief description
Fig. 1 is the stream to the method that the DSP running on the second operating system is operated for first operating system of the present invention
Cheng Tu；
Fig. 2 is the order transfer process schematic diagram in the method for the present invention；
Fig. 3 is applied to schematic flow sheet during Centaurus platform for the method for the present invention；
Fig. 4 is one of the method for the present invention and is embodied as flow chart；
Fig. 5 is the first operating system system structure that the DSP running on the second operating system is operated of the present invention
Schematic diagram.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, develop simultaneously embodiment referring to the drawings,
The present invention is described in further detail.
As shown in figure 1, the method that first operating system of the present invention is operated to the DSP running on the second operating system
Mainly include the following steps that：
First operating system sends interrupt notification by order write shared buffer and to arm processor；
After described arm processor receives described interrupt notification, read the described order in described shared buffer, and sentence
Break to realize the function of described order and run under the second operating system the DSP with multiple DSP daughter nucleus in purpose
DSP daughter nucleus；
Described order is forwarded to described purpose DSP daughter nucleus by described arm processor, so that described purpose DSP daughter nucleus completes
Described function.
Wherein, described first operating system passes through the SDK of this first operating system（Software Development
Kit, SDK）Send interrupt notification by order write shared buffer and to arm processor.Below with
Windows operating system is as the first operating system, the side as a example the second operating system is (SuSE) Linux OS, to the present invention
Method is specifically described.
SDK is software engineer is that the foundation application such as specific software kit, software frame, hardware platform, operating system is soft
The set of the developing instrument of part.For Windows（Form）For operating system, Microsoft often releases an important Windows
Version, typically all can release a SDK simultaneously.SDK contains and develops Windows function needed for this version of window and often
Number definition, api function explanation document, related tool and example.
SDK in the specific embodiment of the invention is the SDK of Windows system, and described DSP is in Centaurus platform
Multi-core DSP, this dsp operation is under linux system.
Using the method for the present invention, forwarded by the order of arm processor and can realize user couple under Windows system
The funcall of DSP.As shown in Fig. 2 user sends downwards order using a series of functional interfaces that SDK provides first；At ARM
Reason device terminates and forwards the command to corresponding DSP daughter nucleus in DSP after receiving SDK order, such as VPS, VID and C674X etc.,
Realize the operation to DSP eventually.
The method of the present invention is applied to Centaurus platform so that user can also enter to DSP under Windows system
Row operation and control, to realize the corresponding function of DSP.As shown in figure 3, in the method for the present invention, arm processor passes through from SDK
Enter line command to receive, then order is forwarded in DSP corresponding DSP daughter nucleus, arm processor is substantially as SDK to DSP's
Order forwarding module, is set up the bridge of an order transmission between SDK and DSP, and then is achieved by identification and forwarding
The control to DSP under Windows system.
The method of the present invention, by increasing arm processor so that the order that SDK is sent can between SDK and DSP
Described DSP is forwarded to by this arm processor, and then may be implemented in operation and the control to described DSP under Windows system,
The video and audio board enabling Centaurus platform is applied to Windows operating system.
In actual motion, it is possible to the loss interrupted occur, that is, SDK is to arm processor for arm processor
The interrupt notification sending is probably due to some reasons are without being obtained by arm processor.For the loss of avoidance breakout, the present invention's
Method still further comprises：
The time-out time of the interrupt notification to be received such as described arm processor setting；
Reach set time-out time when the waiting time of the described interrupt notification to be received such as described arm processor,
And when described arm processor is not received by described interrupt notification, described arm processor all inquires about once described shared buffer
Area is to be confirmed whether the new order having described SDK to write to described shared buffer；
If there is no described new order in described shared buffer, described arm processor continue waiting for receiving new in
Open close know, when the waiting time of the new interrupt notification to be received such as described arm processor having reached set time-out time,
Described arm processor inquires about described shared buffer again to be confirmed whether to have described SDK to write to described shared buffer
New order；
If there being described new order in described shared buffer, described arm processor reads in described shared buffer
Described new ordering and judge to realize the purpose DSP daughter nucleus of the function of described new order；
Described new order is forwarded to described purpose DSP daughter nucleus by described arm processor, so that described purpose DSP daughter nucleus
Complete described function.
As can be seen from the above scheme, after setting timeout period, arm processor just can be every for the method for the present invention
A shared buffer is all inquired about at the end of individual timeout period.So, when the loss situation occurring interrupting, as long as SDK
To in shared buffer, it is written with order, arm processor can read the up-to-date life of SDK write from shared buffer
Order, and then complete the operation to DSP, thus avoidance breakout can lose and cause waiting as long for of arm processor, or even can not
Read the problem of shared buffer.
In the method for the present invention, in order to prevent, reading order from producing mistake, described in reading described shared buffer
After order, before the purpose DSP daughter nucleus judging to realize the function of described order, also include：
Described order is verified；
If verifying successfully, judge to realize the purpose DSP daughter nucleus of the function of described order；Otherwise, wait SDK again to
Arm processor sends interrupt notification.
In addition, in the method for the present invention, described judge to realize the function of described order and run on the second operation system
The purpose DSP daughter nucleus in the DSP with multiple DSP daughter nucleus under system, is to forward matrix table to judge described in realization according to order
The purpose DSP daughter nucleus of the function of order, and order execution time and need purpose DSP daughter nucleus of feedback etc. to realize.
Embodiment illustrated in fig. 4 carries out concrete logic flow during concrete application for the method for the present invention, below to Fig. 4 institute
Show that embodiment flow process is described in detail.
Step a, arm processor are initialized, and to set up shared buffer, to create order forwarding task, execute afterwards
Step b.
The initialization procedure of this step a includes：（1）Set up shared buffer it is intended that fixing memory address as SDK and
The order shared buffer of DSP, and corresponding for this memory address physical address is notified DSP to access for DSP；（2）Create
Order forwarding task, for monitoring the interrupt notification of SDK and forwarding received order to DSP.
Step b, arm processor wait the interrupt notification that SDK sends, and arrange the time-out time of wait；At described ARM
After reason device receives described interrupt notification, or after the waiting time having reached set time-out time, execution step c.
In this step b, arm processor is waited for, and waits the interrupt notification that SDK is sent.When user calls
SDK interface sends after interrupt notification to arm processor, and arm processor produces and interrupts and read shared buffer to judge to be
No have newer command.Cause to wait as long in order to avoid interrupting loss, in step b, be provided with a time-out time, super when reaching
When the time after arm processor automatically will inquire about shared buffer, judge whether there is newer command.As a specific embodiment,
Time-out time is set to 20ms.
Step c, arm processor judge whether etc. until interrupt notification, if it is execution step f, otherwise execution step
d.
When in stepb, arm processor receives interrupt notification, then it is directly entered this step c, without waiting for time-out
Step c is entered back into, now arm processor will determine that out wait in step c after time（Receive）Arrive interrupt notification, subsequently just
It is directly entered step f.When in stepb, arm processor is not received by interrupt notification, and the waiting time reached set
After the time-out time put, then enter this step c, now in step c arm processor will determine that out without waiting in open close
Know, subsequently just enter step d.
Step d, inquiry shared buffer, to confirm the new life whether having described SDK write in described shared buffer
Order, and execution step e.
Step e, judge whether to have the new order of described SDK write in shared buffer, if there are then execution step f,
Otherwise execution step b.
Can be seen that step d from the flow process of abovementioned steps b, step c, the execution of step e is in arm processor not etc.
Until just triggering in the case of interrupting.Carry out in practical application in the method for the present invention, for arm processor, having can
Can occur interrupting losing, the interrupt notification that is, SDK sends to arm processor is probably due to some reasons are without by ARM process
Device obtains, and now SDK is possible to be written with new order to shared buffer.Therefore, time-out time in step b
Setting and step c, step d and step f setting can be effectively prevented because interrupt loss situation occur when led to
Unexpected generation.
In step e, when judging not have the new order of described SDK write in shared buffer, indicate and reaching
To within cycle this period of time-out time, arm processor had both been not received by interrupt notification, also not in shared buffer
Inquire new order, now it is believed that SDK does not send order within cycle this period reaching time-out time.This
In the case of, arm processor returns to the execution state of step b, resumes waiting for SDK transmission in a new timeout period
Interrupt notification.
In step e, when judging to have the new order of described SDK write in shared buffer, indicate and reaching
In cycle this period of time-out time, although arm processor is not received by interrupt notification, SDK is shared slow
Rush and in area, be written with new order, now it is believed that SDK have issued order within cycle this period reaching time-out time, but
It is due to certain（A bit）Reason causes the loss of interrupt notification.In this case, the next step of arm processor processes synchronization
Rapid c medium until the process after interrupt notification is the same it is believed that SDK have issued order, and then carry out the execution of step f.
Step f, order is verified, execution step e afterwards.
Step g, judge command checksum whether success, if it is execution step h, otherwise execution step b.
The setting of step f and step g can prevent order mistake.When judging in step g that step f does not have to command checksum
Success, that is, it is believed that the order that this SDK is sent is wrong when verifying unsuccessfully, then come back to step b, and then avoid
The execution order of DSP mistake, so can effectively prevent bad command from DSP is caused with the control of mistake.
Step h, arm processor forward matrix table according to order, forward the command to purpose DSP daughter nucleus, so that described mesh
DSP daughter nucleus complete the function of described order.
Because the setting of abovementioned steps b to step g is so that when going to this step h, the order that SDK is sent is just permissible
Confirming as is the correct order that DSP is controlled.Now execution step h can really obtain the sent order of SDK and pass through
The function of being realized in DSP after the forwarding of arm processor.
In conjunction with shown in Fig. 4, through step b, when SDK sends interruption by order write shared buffer and to arm processor
Notify, after described arm processor receives described interrupt notification, in step c, arm processor is judged to wait（Receive）Arrive
Interrupt notification, subsequent arm processor reads the described order in described shared buffer, and judges to realize described order
The purpose DSP daughter nucleus of function.Read the described order in described shared buffer in arm processor, and judge that realization is described
During the purpose DSP daughter nucleus of function of order, by the process that order is verified of experience step f and step g.When
Verify unsuccessful in step g, then return to the execution of step b.
In conjunction with shown in Fig. 4, in step b, arm processor arranges the time-out time waiting；After step b, step c, when
The waiting time of the described interrupt notification to be received such as described arm processor has reached set time-out time, and described ARM
When processor is not received by described interrupt notification, then execution step d, described arm processor inquire about described shared buffer with
Confirm the new order whether having described SDK write in described shared buffer；
In step e, if there is no described new order in described shared buffer, return to step b, described ARM process
Device continues waiting for receiving new interrupt notification, when again passing by step b, step c, described arm processor etc. to be received new in
When the open close waiting time known has reached set time-out time, continue executing with step d, described arm processor is inquired about again
Described shared buffer, to be confirmed whether the new order having described SDK to write to described shared buffer, so executes repeatedly；
In step e, if there being described new order in described shared buffer, described arm processor reads described common
Enjoy described new the ordering and judge to realize the purpose DSP daughter nucleus of the function of described new order in relief area；At described ARM
Described new order is forwarded to described purpose DSP daughter nucleus, so that described purpose DSP daughter nucleus completes described function by reason device.For
Embodiment illustrated in fig. 4, wherein further comprises the process that described new order is verified.
In the present invention, the process that described order is verified is the described order in reading described shared buffer
Afterwards, carry out before the purpose DSP daughter nucleus judging to realize the function of described order.Specifically can be found in step f in Fig. 4, step g
With step f.
In the present invention, judge to realize the concrete DSP daughter nucleus of the function of described order and described order is forwarded to institute
Stating purpose DSP daughter nucleus is to forward matrix table to realize according to order, and described order forwards matrix table to include：
_retCoreFlg_（Execution core identification parameter）：For judging the purpose DSP daughter nucleus of the function of realizing described order；
_recevCoreFlg_（Return core identification parameter）：For judging the DSP daughter nucleus of return information；
_wait_（Waiting time parameter）：For recording the waiting time of described order, if within the set time not
Described order can be completed, then report mistake；
_chanType_（Channel type parameter）：For recording channel type, the number of channels of described order, for right
Described order is verified；
_bPara_（Command parameter）：The parameter of order, for realizing the transmission of order；
_bRetPara_（Order feedback parameter）：The feedback parameter of order, for realizing the transmission of the parameter that order returns；
_buf_（Order buffer parameter）：The relief area of order, for placement parameter information；
_retBuf_（Order feedback buffer parameter）：The feedback relief area of order, for placing the information such as return parameterss；
_func_（Execution function parameter）：Order the corresponding function pointer realizing function.
Wherein _ chanType_ is dispensable, and other all parameters are essential.But it is noted that some orders
Take less than _ retBuf_（Order feedback buffer parameter）, _ retBuf_ takes less than to these _ and the order of retBuf_ is not use
, but be probably then useful to other orders.
Order forwards each parameter in matrix table as mentioned above, and order forwards matrix table to have recorded the whole letters needed for order
Breath.SDK only need to provide command number and necessary arrange parameter to during DSP transmitting order to lower levels, thus shielding by arm processor
The detail of order setting.Arm processor passes through command sequence number and can find the corresponding command in order forwarding matrix table,
When at this, itemized record execute the DSP daughter nucleus of this corresponding command, the DSP daughter nucleus that needs feedback information, exectorial wait
Between, order type（Coding, decoding or display）, the information such as exectorial function pointer.And then arm processor will order and
Relevant parameter is issued to corresponding DSP daughter nucleus, and forwards the function pointer in matrix table to call accordingly in this daughter nucleus by order
Function complete order.Feedback information is write the feedback relief area forwarding order in matrix table by last DSP daughter nucleus（_
retBuf_）And feedback parameter（_bRetPara_）, thus completing the interaction of SDK and multi-core DSP.
The method of the present invention, by increasing ARM process between the DSP under the first operating system and the second operating system
Device is so that the order that the first operating system is sent can be forwarded to described DSP by this arm processor, and then may be implemented in
First operating system（As Windows system）Under control to described DSP, and then make the video and audio plate of Centaurus platform
Card can be applied to Windows operating system.
According to said method, present invention also offers a kind of first operating system is to the DSP running on the second operating system
The system being operated, as shown in figure 5, include：The SDK of the first operating system, for by order write shared buffer and to
Arm processor sends interrupt notification；
Arm processor, for receiving described interrupt notification, reads the described order in described shared buffer, and judges
Purpose DSP in the DSP with multiple DSP daughter nucleus that is going out to realize described command functions and running under the second operating system
Core, and described order is forwarded to described purpose DSP daughter nucleus, so that described purpose DSP daughter nucleus completes described function；And
DSP, runs under the second operating system, has multiple DSP daughter nucleus, such as VID, VPS and C674X etc..This DSP is
Multi-core DSP in Centaurus platform.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement done etc., should be included within the scope of protection of the invention.
Claims (8)
1. a kind of method that first operating system is operated to the DSP running on the second operating system, including：
First operating system sends interrupt notification by order write shared buffer and to arm processor；
After described arm processor receives described interrupt notification, read the described order in described shared buffer, and judge
Realize the function of described order and run under the second operating system the DSP with multiple DSP daughter nucleus in purpose DSP
Core；
Described order is forwarded to described purpose DSP daughter nucleus by described arm processor so that described purpose DSP daughter nucleus complete described
Function；
Wherein, described first operating system passes through the SDK of this first operating system by order write shared buffer and at ARM
Reason device sends interrupt notification；
Methods described also includes：
The time-out time of the interrupt notification to be received such as described arm processor setting；
Reach set time-out time when the waiting time of the described interrupt notification to be received such as described arm processor, and
When described arm processor is not received by described interrupt notification, described arm processor inquires about described shared buffer to confirm
State the new order whether having described SDK write in shared buffer；
If there is no described new order in described shared buffer, described arm processor continue waiting for receiving new in open close
Know；
If there being described new order in described shared buffer, described arm processor reads the institute in described shared buffer
State new ordering and judge to realize the purpose DSP daughter nucleus of the function of described new order；Described arm processor will be described new
Order is forwarded to described purpose DSP daughter nucleus, so that described purpose DSP daughter nucleus completes described function.
2. method according to claim 1 it is characterised in that：Described time-out time is 20ms.
3. method according to claim 1 it is characterised in that read described shared buffer in described order after,
Before the purpose DSP daughter nucleus judging to realize the function of described order, also include：
Described order is verified；
If verifying successfully, judge to realize the purpose DSP daughter nucleus of the function of described order；Otherwise, wait SDK again at ARM
Reason device sends interrupt notification.
4. method according to claim 1 it is characterised in that：Described judge to realize the function of described order and run
Purpose DSP daughter nucleus in the DSP with multiple DSP daughter nucleus under the second operating system, is to forward matrix table to sentence according to order
Break and the purpose DSP daughter nucleus of the function of realizing described order, and the purpose DSP daughter nucleus of order execution time and needs feedback is real
Existing.
5. method according to claim 4 is it is characterised in that described order forwards matrix table to include：
_retCoreFlg_：For judging the purpose DSP daughter nucleus of the function of realizing described order；
_recevCoreFlg_：For judging the DSP daughter nucleus of return information；
_wait_：For recording the waiting time of described order, if described order can not be completed within the set time, report
Accuse mistake；
_bPara_：The parameter of order, for realizing the transmission of command parameter；
_bRetPara_：The feedback parameter of order, for realizing the transmission of order return parameterss；
_buf_：The relief area of order, for placement parameter information；
_retBuf_：The feedback relief area of order, for placing the information such as return parameterss；
_func_：Order the corresponding function pointer realizing function.
6. the method according to any one of claim 1 to 5 is it is characterised in that described DSP daughter nucleus includes：Programmable high definition
Video image coprocessor VID, HD video processing subsystem VPS and C674X.
7. the method according to any one of claim 1 to 5 it is characterised in that：Described DSP is in Centaurus platform
Multi-core DSP.
8. the system that a kind of first operating system is operated to the DSP running on the second operating system is it is characterised in that wrap
Include：
The SDK of the first operating system, sends interrupt notification for by order write shared buffer and to arm processor；
Arm processor, for receiving described interrupt notification, reads the described order in described shared buffer, and judges reality
Existing described order function and run under the second operating system the DSP with multiple DSP daughter nucleus in purpose DSP
Core, and described order is forwarded to described purpose DSP daughter nucleus, so that described purpose DSP daughter nucleus completes described function；And
DSP, runs under the second operating system, has multiple DSP daughter nucleus；
Described arm processor, is additionally operable to the time-out time of the interrupt notification to be received such as setting, when described arm processor etc. is waiting
The waiting time receiving described interrupt notification has reached set time-out time, and described arm processor is not received by institute
When stating interrupt notification, whether described arm processor inquires about described shared buffer described to confirm to have in described shared buffer
The new order of SDK write；
If there is no described new order in described shared buffer, described arm processor continue waiting for receiving new in open close
Know；
If there being described new order in described shared buffer, described arm processor reads the institute in described shared buffer
State new ordering and judge to realize the purpose DSP daughter nucleus of the function of described new order；Described arm processor will be described new
Order is forwarded to described purpose DSP daughter nucleus, so that described purpose DSP daughter nucleus completes described function.
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