CN102981435A - Vehicle-mounted terminal device based on double central processing units (CPUs) and control method - Google Patents
Vehicle-mounted terminal device based on double central processing units (CPUs) and control method Download PDFInfo
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- CN102981435A CN102981435A CN2012104940939A CN201210494093A CN102981435A CN 102981435 A CN102981435 A CN 102981435A CN 2012104940939 A CN2012104940939 A CN 2012104940939A CN 201210494093 A CN201210494093 A CN 201210494093A CN 102981435 A CN102981435 A CN 102981435A
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Abstract
The invention provides a vehicle-mounted terminal device based on double central processing units (CPUs) and a control method. The vehicle-mounted terminal device based on the double CPUs at least comprises a main CPU and an auxiliary CPU, the main CPU is used for operating an android system and connected with a display screen, the auxiliary CPU is used for monitoring an automobile controller area network (CAN) bus and connected with the main CPU, the auxiliary CPU enables data of the automobile CAN bus to be fed back to the main CPU through a serial port in real time, and the main CPU enables the data of the automobile CAN bus to be displayed on the display screen through a vehicle condition information module. Simultaneously, the auxiliary CPU controls power supply state of the main CPU through a power supply chip, a power supply of the main CPU is closed automatically when an automobile is parked, and the auxiliary CPU enters into deep sleep mode. The vehicle-mounted terminal device based on double CPUs and the control method can operate the android system through the main CPU, effectively reduce power consumption, simultaneously achieve remote anti-theft comprehensively, and meet security and protection requirements.
Description
Technical field
The present invention relates to a kind of car-mounted terminal, relate in particular to a kind of on-vehicle terminal device based on two CPU, and relate to a kind of control method of the on-vehicle terminal device based on two CPU.
Background technology
Traditional vehicle-mounted terminal system entertainment effect is general, after introducing Android system, can greatly strengthen although system is recreational, but this Android system but can't be realized communication with automobile CAN-bus, safety protection function just can't guarantee that also the safety protection function of the basic function such as i.e. audio-visual amusement, phone and navigation of android equipment and onboard system is difficult to take into account simultaneously; And the android equipment power dissipation is large, and this also is a major challenge to onboard system.
Summary of the invention
It is little that technical matters to be solved by this invention provides a kind of power consumption, and can take into account simultaneously the on-vehicle terminal device of Android system and security protection demand.
To this, the invention provides a kind of on-vehicle terminal device based on two CPU, comprise at least a host CPU and a secondary CPU;
Wherein, described host CPU is used for the operation Android system, and is connected with display screen;
Described secondary CPU is used for the CAN bus of monitoring automobile, and be connected with host CPU, described secondary CPU crosses serial ports with the data communication device of automobile CAN-bus in real time and feeds back to host CPU, and host CPU is then crossed the vehicle condition information module with the data communication device of this automobile CAN-bus and is presented on the display screen; Simultaneously, described secondary CPU is by the power supply state of power supply chip control host CPU, the power supply of autoshutdown host CPU then when parking of automobile, secondary CPU penetration depth sleep pattern.
The present invention powers to host CPU by secondary CPU control power supply chip, autoshutdown host CPU power supply when parking of automobile, and while secondary CPU penetration depth sleep pattern, the power consumption of on-vehicle terminal device just can reduce greatly like this, and minimum 3mA can realize; On this basis, host CPU operation Android system, audio-visual amusement, phone and navigation feature are available in all varieties, and secondary CPU also monitors automobile CAN-bus, in order to allow the car owner understand in real time vehicle condition, framework of the present invention is reasonable, low in energy consumption, and the requirement to host CPU and secondary CPU is all very low, no longer needs CPU at a high speed, and then can control cost well.
The present invention is based on that the framework of two CPU realizes, two CPU adopt MIPS frameworks and MIPS framework, comprise comprising that at least a host CPU and a secondary CPU cooperatively interact work, also can change according to the demand of reality the quantity of CPU.
Further improvement of the present invention is, also comprise the 3G module, described host CPU all is connected with the 3G module with secondary CPU, and when accident, host CPU and secondary CPU all can call the 3G module to the backstage emergency or send short messages to programmed emergency with timely feedback accident conditions; When parking of automobile and when the security protection event occurs, secondary CPU can be interrupted waking up by the CAN bus, and automatically to backstage feedback security protection situation.
Described 3G module is used in accident or security protection event, to the backstage or programmed emergency send an SOS; Described distress signal comprises accident distress signal and security protection distress signal, is respectively applied to carry out automatic help in accident and security protection event.
In prior art, the security protection event occurs just directly reports to the police, the present invention is at parking of automobile and when the security protection event occurs, and secondary CPU can be interrupted waking up by the CAN bus, and automatically to backstage feedback security protection situation, preferably, the mode of described secondary CPU by note be automatically to backstage feedback security protection situation, can more effectively anti-illegal-inbreak, can also further send confirmation signal to car owner's mobile phone (being user mobile phone), to guarantee whether really to have occured the security protection event, prevent wrong report information.And when accident, host CPU and secondary CPU all can call the 3G module to the backstage emergency or send short messages to programmed emergency with timely feedback accident conditions, distress signal in time, effectively, preferably, after the backstage receives the accident distress signal, can automatically dial user mobile phone, if when the car owner has response and expression not to need to rescue, then abandon rescue; If the car owner during dont answer, then in time arranges rescue within a certain period of time, carry out different rescues for traffic hazard in various degree when preventing false alarm and process.
Further improvement of the present invention is, secondary CPU also comprises the parsing control module, when parking of automobile and when the security protection event occurs, secondary CPU passes through to resolve the parsing that control module is carried out command adapted thereto after receiving the backstage instruction, and control vehicle body engine block and throttle module, call simultaneously GPS information reporting automobile current location.
Described parsing control module is used for resolving the command adapted thereto on backstage, and then control vehicle body module, such as engine block and throttle module, calls simultaneously GPS information reporting automobile current location, with round Realization remote anti-theft function.
Further improvement of the present invention is, also comprises the program detection module, for detection of and control the program that host CPU moves; Described secondary CPU detects automatically whether the program that host CPU moves is necessary program, if not necessary program, and bolt down procedure and adopt hardware to cut away peripheral apparatus corresponding to this program then; If necessary program is then by this program of wake-up signal wakes.
In the existing on-vehicle terminal device, although the foreground shows that the program comparision that is just moving is few, but in fact, a lot of programs all at running background, these programs are unnecessary mostly, at least be unnecessary under the current state, and unnecessary program will certainly cause very large energy consumption waste at running background; The present invention can be by program detection module autotest whether at front stage operation or whether within nearly a few minutes (such as nearly 10 minutes), operation is being arranged, and then judge whether this program that host CPU moves is necessary program, if not necessary program, then bolt down procedure and adopt hardware to cut away peripheral apparatus corresponding to this program is saved power consumption; If necessary program is then by this program of wake-up signal wakes.
Further improvement of the present invention is that described secondary CPU bolt down procedure also adopts hardware to cut away before peripheral apparatus corresponding to program, can send request command to display screen to prevent maloperation.Whether, to this program be necessary program at last confirm, in case turned off the program that some users prepare to use, improve human oriented design and the operation of on-vehicle terminal device if can and adopt at bolt down procedure like this before hardware cuts away peripheral apparatus corresponding to program.
The present invention also provides a kind of control method of the on-vehicle terminal device based on two CPU, comprises at least a host CPU and a secondary CPU; And may further comprise the steps,
Vehicle condition determining step, described secondary CPU be according to vehicle condition and the power supply state by power supply chip control host CPU, if vehicle condition is the then power supply of autoshutdown host CPU that stops, and secondary CPU penetration depth sleep pattern simultaneously; Otherwise enter monitoring step;
Monitoring step, described secondary CPU monitoring automobile CAN-bus, and in real time the data communication device of automobile CAN-bus is crossed serial ports and feed back to host CPU, host CPU is then crossed the vehicle condition information module with the data communication device of this automobile CAN-bus and is presented on the display screen, if accident then enters the emergency step;
The emergency step, host CPU and secondary CPU all can call the 3G module to the backstage or programmed emergency transmission accident distress signal with timely feedback accident conditions.
Power to host CPU according to vehicle condition by secondary CPU control power supply chip, close the host CPU power supply when parking of automobile, secondary CPU penetration depth sleep pattern just can reduce power consumption greatly simultaneously, and the power consumption minimum is 3mA; Simultaneously, if automobile in motion, host CPU and secondary CPU can realize Android system or other vehicle entertainment system with cooperatively interacting, and realize that simultaneously comprehensive security protection detects, and framework of the present invention is reasonable, and power consumption is little, requirement to CPU is very low, can control cost quite reasonablely.
Further improvement of the present invention is, also comprises the wake-up interrupts step, and when parking of automobile and when the security protection event occurs, secondary CPU can be interrupted waking up by the CAN bus, and automatically sends the security protection distress signal to the backstage with feedback security protection situation; Secondary CPU resolves the backstage instruction after receiving the backstage instruction, and control vehicle body engine block and throttle module, calls simultaneously GPS information reporting automobile current location.
By secondary CPU monitoring automobile CAN-bus, when automobile just in motion, secondary CPU can cross serial ports with the automobile CAN data communication device in real time and feed back to host CPU, host CPU then can show it by the vehicle condition information module, make the car owner in time understand vehicle condition.If car accident occurs this moment, host CPU can call the 3G module to the backstage emergency or send short messages to programmed emergency report correlation circumstance; When parking of automobile (host CPU outage, secondary CPU deep sleep), if generation security protection event, secondary CPU can be interrupted waking up by the CAN bus, and secondary CPU will be automatically to backstage feedback security protection situation, more comprehensive to realize, rational security protection and emergency demand.
Further improvement of the present invention is, also comprises the affirmation step, and after the accident distress signal was received on the backstage, automatic poking was phoned car owner's mobile phone, to be confirmed whether to make further rescue work; After the security protection distress signal is received on the backstage, automatically send note to car owner's mobile phone, to be confirmed whether to occur the security protection accident.
The situation that occurs unavoidably some false alarms in the reality, the present invention can dial user mobile phone automatically after the backstage receives the accident distress signal, if when the car owner has response and expression not to need to rescue, then abandon rescue; If the car owner is within a certain period of time during dont answer, then larger traffic hazard might appear, and then in time arrange rescue, when preventing false alarm, carry out different rescues for traffic hazard in various degree and process, so that rescue work can be carried out timely and effectively; After the security protection distress signal is received on the backstage, automatically send note to car owner's mobile phone, being confirmed whether to occur the security protection accident, can more effectively anti-illegal-inbreak, can also further guarantee whether really to have occured the security protection event to car owner's mobile phone (being user mobile phone), prevent wrong report information.
Further improvement of the present invention is, also comprises the program detecting step, and described secondary CPU detects automatically whether the program that host CPU moves is necessary program, if not necessary program, and bolt down procedure and adopt hardware to cut away peripheral apparatus corresponding to this program then; If necessary program is then by the wake-up signal wakes program.
The present invention can be by autotest whether at front stage operation or whether within nearly a few minutes (such as nearly 10 minutes), operation is being arranged, and then judge whether this program that host CPU moves is necessary program, if not necessary program, bolt down procedure and adopt hardware to cut away peripheral apparatus corresponding to this program is then saved because of the unnecessary program of running background and peripheral apparatus and is caused power consumption; If necessary program is then by this program of wake-up signal wakes.
Further improvement of the present invention is that the program detecting step also comprises verification step, and described secondary CPU bolt down procedure also adopts hardware to cut away before peripheral apparatus corresponding to program, can send request command to display screen and verify to prevent maloperation.Can and adopt at bolt down procedure like this before hardware cuts away peripheral apparatus corresponding to program, whether be that necessary program is carried out last affirmation to this program, in case turned off the program that some users prepare to use, improve human oriented design and the operation of on-vehicle terminal device.
Compared with prior art, the invention has the advantages that, can move Android system by host CPU, recreational greatly enhancing; By the power supply of secondary CPU control host CPU, effectively reduce the power consumption of on-vehicle terminal device simultaneously; What is more important, reducing power consumption and strengthening on the recreational basis, secondary CPU can also the Real Time Monitoring automobile CAN-bus, makes the car owner understand in real time vehicle condition, when car accident occured, on-vehicle terminal device can in time call 3G module and backstage or programmed emergency communication emergency; When the security protection event occurs when, secondary CPU feeds back to the backstage with safeguard information by the 3G module, this moment, the backstage can send the backstage instruction to on-vehicle terminal device, the engine block of Long-distance Control automobile and throttle module, obtain simultaneously GPS information, and then the round Realization remote anti-theft, and can prevent false alarm.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, more excellent embodiment of the present invention is described in further detail:
Embodiment 1:
This example provides a kind of on-vehicle terminal device based on two CPU, comprises at least a host CPU and a secondary CPU;
Wherein, described host CPU is used for the operation Android system, and is connected with display screen;
Described secondary CPU is used for the CAN bus of monitoring automobile, and be connected with host CPU, described secondary CPU crosses serial ports with the data communication device of automobile CAN-bus in real time and feeds back to host CPU, and host CPU is then crossed the vehicle condition information module with the data communication device of this automobile CAN-bus and is presented on the display screen; Simultaneously, described secondary CPU is by the power supply state of power supply chip control host CPU, the power supply of autoshutdown host CPU then when parking of automobile, secondary CPU penetration depth sleep pattern.
This routine structural representation as shown in Figure 1, this example is powered to host CPU by secondary CPU control power supply chip, autoshutdown host CPU power supply when parking of automobile, simultaneously secondary CPU penetration depth sleep pattern, the power consumption of on-vehicle terminal device just can reduce greatly like this, and minimum 3mA can realize; On this basis, host CPU operation Android system, audio-visual amusement, phone and navigation feature are available in all varieties, and secondary CPU also monitors automobile CAN-bus, in order to allow the car owner understand in real time vehicle condition, this routine framework is reasonable, low in energy consumption, and the requirement to host CPU and secondary CPU is all very low, no longer needs CPU at a high speed, and then can control cost well.As shown in Figure 1, this routine power supply chip can adopt TDA3683, secondary CPU crosses the UART serial ports with the data communication device of automobile CAN-bus in real time and feeds back to host CPU, host CPU and secondary CPU all can cry for help to the backstage or send short messages to programmed emergency with timely feedback accident conditions by the 3G module, the 3G module can be MT509, secondary CPU can call GPS information reporting automobile current location, and GPS can be NEO-6.
This example is when accident, and host CPU and secondary CPU all can call the 3G module to the backstage emergency or send short messages to programmed emergency with timely feedback accident conditions; When parking of automobile and when the security protection event occurs, secondary CPU can be interrupted waking up by the CAN bus, and automatically to backstage feedback security protection situation.
The further improvement of this example is, when parking of automobile and when the security protection event occurs, secondary CPU passes through to resolve the parsing that control module is carried out command adapted thereto after receiving the backstage instruction, and control vehicle body engine block and throttle module, call simultaneously GPS information reporting automobile current location, with round Realization remote anti-theft function.
Embodiment 2:
On the basis of embodiment 1, this example also comprises the program detection module, for detection of and control the program that host CPU moves; Described secondary CPU detects automatically whether the program that host CPU moves is necessary program, if not necessary program, and bolt down procedure and adopt hardware to cut away peripheral apparatus corresponding to this program then; If necessary program is then by this program of wake-up signal wakes.
In the existing on-vehicle terminal device, although the foreground shows that the program comparision that is just moving is few, but in fact, a lot of programs all at running background, these programs are unnecessary mostly, at least be unnecessary under the current state, and unnecessary program will certainly cause very large energy consumption waste at running background; This example can be by program detection module autotest whether at front stage operation or whether within nearly a few minutes, operation is being arranged, whether this example is preferably autotest had at front stage operation in nearly 10 minutes, these data can be made amendment according to actual needs, and then judge whether this program that host CPU moves is necessary program, if not necessary program, then bolt down procedure and adopt hardware to cut away peripheral apparatus corresponding to this program is saved power consumption; If necessary program is then by this program of wake-up signal wakes.
The further improvement of this example is that described secondary CPU bolt down procedure also adopts hardware to cut away before peripheral apparatus corresponding to program, can send request command to display screen to prevent maloperation.Whether, to this program be necessary program at last confirm, in case turned off the program that some users prepare to use, improve human oriented design and the operation of on-vehicle terminal device if can and adopt at bolt down procedure like this before hardware cuts away peripheral apparatus corresponding to program.
Embodiment 3:
This example provides a kind of control method of the on-vehicle terminal device based on two CPU, comprises at least a host CPU and a secondary CPU; And may further comprise the steps,
Vehicle condition determining step, described secondary CPU be according to vehicle condition and the power supply state by power supply chip control host CPU, if vehicle condition is the then power supply of autoshutdown host CPU that stops, and secondary CPU penetration depth sleep pattern simultaneously; Otherwise enter monitoring step;
Monitoring step, described secondary CPU monitoring automobile CAN-bus, and in real time the data communication device of automobile CAN-bus is crossed serial ports and feed back to host CPU, host CPU is then crossed the vehicle condition information module with the data communication device of this automobile CAN-bus and is presented on the display screen, if accident then enters the emergency step;
The emergency step, host CPU and secondary CPU all can call the 3G module to the backstage or programmed emergency transmission accident distress signal with timely feedback accident conditions.
Power to host CPU according to vehicle condition by secondary CPU control power supply chip, close the host CPU power supply when parking of automobile, secondary CPU penetration depth sleep pattern just can reduce power consumption greatly simultaneously, and the power consumption minimum is 3mA; Simultaneously, if automobile in motion, host CPU and secondary CPU can realize Android system or other vehicle entertainment system with cooperatively interacting, and realize that simultaneously comprehensive security protection detects, and this routine framework is reasonable, and power consumption is little, requirement to CPU is very low, can control cost quite reasonablely.
This example is when parking of automobile and when the security protection event occurs, and secondary CPU can be interrupted waking up by the CAN bus, and automatically sends the security protection distress signal to the backstage with feedback security protection situation; Secondary CPU resolves the backstage instruction after receiving the backstage instruction, and control vehicle body engine block and throttle module, calls simultaneously GPS information reporting automobile current location.
By secondary CPU monitoring automobile CAN-bus, when automobile just in motion, secondary CPU can cross serial ports with the automobile CAN data communication device in real time and feed back to host CPU, host CPU then can show it by the vehicle condition information module, make the car owner in time understand vehicle condition.If car accident occurs this moment, host CPU can call the 3G module to the backstage emergency or send short messages to programmed emergency report correlation circumstance; When parking of automobile (host CPU outage, secondary CPU deep sleep), if generation security protection event, secondary CPU can be interrupted waking up by the CAN bus, and secondary CPU will be automatically to backstage feedback security protection situation, more comprehensive to realize, rational security protection and emergency demand.
Embodiment 4:
On the basis of embodiment 3, this example also comprises the affirmation step, and after the accident distress signal was received on the backstage, automatic poking was phoned car owner's mobile phone, to be confirmed whether to make further rescue work; After the security protection distress signal is received on the backstage, automatically send note to car owner's mobile phone, to be confirmed whether to occur the security protection accident.
The situation that occurs unavoidably some false alarms in the reality, this example can be dialed user mobile phone automatically after the backstage receives the accident distress signal, if when the car owner has response and expression not to need to rescue, then abandon rescue; If the car owner is within a certain period of time during dont answer, then larger traffic hazard might appear, and then in time arrange rescue, when preventing false alarm, carry out different rescues for traffic hazard in various degree and process, so that rescue work can be carried out timely and effectively; After the security protection distress signal is received on the backstage, automatically send note to car owner's mobile phone, being confirmed whether to occur the security protection accident, can more effectively anti-illegal-inbreak, can also further guarantee whether really to have occured the security protection event to car owner's mobile phone (being user mobile phone), prevent wrong report information.
Compared with prior art, this routine advantage is, can move Android system by host CPU, recreational greatly enhancing; By the power supply of secondary CPU control host CPU, effectively reduce the power consumption of on-vehicle terminal device simultaneously; What is more important, reducing power consumption and strengthening on the recreational basis, secondary CPU can also the Real Time Monitoring automobile CAN-bus, makes the car owner understand in real time vehicle condition, when car accident occured, on-vehicle terminal device can in time call 3G module and backstage or programmed emergency communication emergency; When the security protection event occurs when, secondary CPU feeds back to the backstage with safeguard information by the 3G module, this moment, the backstage can send the backstage instruction to on-vehicle terminal device, the engine block of Long-distance Control automobile and throttle module, obtain simultaneously GPS information, and then the round Realization remote anti-theft, and can prevent false alarm.
Above content is the further description of the present invention being done in conjunction with concrete preferred implementation, can not assert that implementation of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. the on-vehicle terminal device based on two CPU is characterized in that, comprises at least a host CPU and a secondary CPU;
Wherein, described host CPU is used for the operation Android system, and is connected with display screen;
Described secondary CPU is used for the CAN bus of monitoring automobile, and be connected with host CPU, described secondary CPU crosses serial ports with the data communication device of automobile CAN-bus in real time and feeds back to host CPU, and host CPU is then crossed the vehicle condition information module with the data communication device of this automobile CAN-bus and is presented on the display screen; Simultaneously, described secondary CPU is by the power supply state of power supply chip control host CPU, the power supply of autoshutdown host CPU then when parking of automobile, secondary CPU penetration depth sleep pattern.
2. the on-vehicle terminal device based on two CPU according to claim 1, it is characterized in that, also comprise the 3G module, described host CPU all is connected with the 3G module with secondary CPU, when accident, host CPU and secondary CPU all can call the 3G module to the backstage emergency or send short messages to programmed emergency with timely feedback accident conditions; When parking of automobile and when the security protection event occurs, secondary CPU can be interrupted waking up by the CAN bus, and automatically to backstage feedback security protection situation.
3. the on-vehicle terminal device based on two CPU according to claim 2, it is characterized in that, secondary CPU also comprises the parsing control module, when parking of automobile and when the security protection event occurs, secondary CPU passes through to resolve the parsing that control module is carried out command adapted thereto after receiving the backstage instruction, and control vehicle body engine block and throttle module, call simultaneously GPS information reporting automobile current location.
4. according to claim 1 to the described on-vehicle terminal device based on two CPU of 3 any one, it is characterized in that, also comprise the program detection module, for detection of and control the program that host CPU moves; Described secondary CPU detects automatically whether the program that host CPU moves is necessary program, if not necessary program, and bolt down procedure and adopt hardware to cut away peripheral apparatus corresponding to this program then; If necessary program is then by the wake-up signal wakes program.
5. the on-vehicle terminal device based on two CPU according to claim 4 is characterized in that, described secondary CPU bolt down procedure also adopts hardware to cut away before peripheral apparatus corresponding to program, can send request command to display screen to prevent maloperation.
6. the control method based on the on-vehicle terminal device of two CPU is characterized in that, comprises at least a host CPU and a secondary CPU; And may further comprise the steps,
Vehicle condition determining step, described secondary CPU be according to vehicle condition and the power supply state by power supply chip control host CPU, if vehicle condition is the then power supply of autoshutdown host CPU that stops, and secondary CPU penetration depth sleep pattern simultaneously; Otherwise enter monitoring step;
Monitoring step, described secondary CPU monitoring automobile CAN-bus, and in real time the data communication device of automobile CAN-bus is crossed serial ports and feed back to host CPU, host CPU is then crossed the vehicle condition information module with the data communication device of this automobile CAN-bus and is presented on the display screen, if accident then enters the emergency step;
The emergency step, host CPU and secondary CPU all can call the 3G module to the backstage or programmed emergency transmission accident distress signal with timely feedback accident conditions.
7. the control method of the on-vehicle terminal device based on two CPU according to claim 6, it is characterized in that, also comprise the wake-up interrupts step, when parking of automobile and when the security protection event occurs, secondary CPU can be interrupted waking up by the CAN bus, and automatically sends the security protection distress signal to the backstage with feedback security protection situation; Secondary CPU resolves the backstage instruction after receiving the backstage instruction, and control vehicle body engine block and throttle module, calls simultaneously GPS information reporting automobile current location.
8. the control method of the on-vehicle terminal device based on two CPU according to claim 7, it is characterized in that, also comprise the affirmation step, after the accident distress signal is received on the backstage, automatic poking is phoned car owner's mobile phone, to be confirmed whether to make further rescue work; After the security protection distress signal is received on the backstage, automatically send note to car owner's mobile phone, to be confirmed whether to occur the security protection accident.
9. according to the control method of the described on-vehicle terminal device based on two CPU of right 6 to 8 any one, it is characterized in that, also comprise the program detecting step, described secondary CPU detects automatically whether the program that host CPU moves is necessary program, if not necessary program, bolt down procedure and adopt hardware to cut away peripheral apparatus corresponding to this program then; If necessary program is then by the wake-up signal wakes program.
10. the control method of the on-vehicle terminal device based on two CPU according to claim 9, it is characterized in that, the program detecting step also comprises verification step, described secondary CPU bolt down procedure also adopts hardware to cut away before peripheral apparatus corresponding to program, can send request command to display screen and verify to prevent maloperation.
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| CN102981435B (en) | 2015-07-22 |
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