CN111025990A - RISC-V based vehicle-mounted terminal system - Google Patents
RISC-V based vehicle-mounted terminal system Download PDFInfo
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- CN111025990A CN111025990A CN201911354541.3A CN201911354541A CN111025990A CN 111025990 A CN111025990 A CN 111025990A CN 201911354541 A CN201911354541 A CN 201911354541A CN 111025990 A CN111025990 A CN 111025990A
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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Abstract
The invention discloses a vehicle-mounted terminal system based on RISC-V, which relates to the technical field of embedded vehicle networking and comprises a RISC-V kernel module, a state monitoring module, a platform management module, a communication transmission module and a vehicle machine interface module; the RISC-V kernel module is composed of a CPU kernel which accords with the RISC-V instruction set standard; the vehicle-mounted machine interface module consists of a controller local area network transceiver and is used for carrying out physical connection with a vehicle and transmitting vehicle data; the state monitoring module is used for receiving vehicle data transmitted by the vehicle-mounted interface, analyzing and storing the data according to rules, and transmitting selected vehicle data information to the platform management module; the platform management module is used for performing enabling management on the RISC-V kernel module and the vehicle machine interface module according to the input current vehicle state information; the communication transmission module is used for transmitting the vehicle data received by the platform management module into a remote end so as to realize vehicle information reporting and remote end management. The invention can meet the severe requirements of the continuously developed vehicle networking on the vehicle-mounted terminal.
Description
Technical Field
The invention relates to the technical field of embedded vehicle networking, in particular to a vehicle-mounted terminal system based on RISC-V.
Background
RISC-V generally refers to the RISC-V instruction set and a series of ecology derived therefrom. The RISC-V instruction set, similar to the INTEL X86, ARM instruction set, is an instruction set that is read into memory by the CPU and directs the computer to run. The CPU implementing the instruction set can execute all basic instructions specified in the instruction set, so that programs compiled according to the instruction set can run without obstacles, and the CPU has the portability and compatibility with the same series of CPUs.
In contrast to most ISAs, RISC-V ISAs can be used freely in all desired devices, allowing anyone to design, manufacture and sell RISC-V chips and software. RISC-V has the advantages of complete open source, simple architecture, easy Linux transplantation, modular design, complete tool chain and the like, and is suitable for realizing system master control in the outbreak environment of the Internet of things.
The vehicle-mounted terminal is front-end equipment of a vehicle monitoring and management system, can also be called a vehicle dispatching and monitoring terminal (TCU terminal), integrates multiple functions of positioning, communication, an automobile driving recorder and the like, and has a strong service dispatching function, data processing capacity and the like.
Based on this, if RISC-V can be applied to the vehicle-mounted system implementation, the advantages of both RISC-V and vehicle-mounted terminal are combined, which can better meet the development of the industry.
Disclosure of Invention
Aiming at the requirements and the defects of the prior art development, the invention provides a vehicle-mounted terminal system based on RISC-V.
The invention discloses a vehicle-mounted terminal system based on RISC-V, which adopts the following technical scheme for solving the technical problems:
a RISC-V based in-vehicle terminal system, comprising: RISC-V kernel module, state monitoring module, platform management module, communication transmission module, vehicle interface module;
the RISC-V kernel module is composed of a CPU kernel which accords with the RISC-V instruction set standard;
the vehicle-mounted machine interface module is composed of a controller local area network transceiver and is used for being physically connected with a vehicle and transmitting vehicle data;
the state monitoring module is used for receiving vehicle data transmitted by the vehicle-mounted interface, analyzing and storing the data according to rules, and transmitting selected vehicle data information to the platform management module;
the platform management module is used for performing enabling management on the RISC-V kernel module and the vehicle machine interface module according to the input current vehicle state information;
the communication transmission module is used for transmitting the vehicle data received by the platform management module into a remote end so as to realize vehicle information reporting and remote end management.
Optionally, the related state monitoring module is configured to monitor various information of vehicle speed, acceleration, vehicle position, vehicle height, and environment temperature and humidity within a period of time and at the current time, divide the state and duration of each state of the current vehicle according to rules, and transmit the state and duration of each state to the platform management module.
Further optionally, the current vehicle state includes an idle state, a general working state and a special working state;
when the state monitoring module monitors that the vehicle is in a long-term idling state, the platform management module gives a sleep instruction, so that the terminal system enters an extremely low power consumption state and returns to a general working state when the vehicle state changes;
when the state monitoring module monitors that the vehicle is in a normal running or stopping state, the platform management module gives a general working state enabling instruction to enable the terminal system to enter a general working state;
when the state monitoring module monitors that the vehicle is in an abnormal driving state, the platform management module gives a special working state enabling instruction, so that the terminal system enters a special working state.
Further optionally, RISC-V kernel module supports RISC-V basic instruction set RV32IF or RV 32E.
Further optionally, the RISC-V kernel module divides different power domains and clock domains in the kernel, and the RISC-V kernel module includes a basic instruction sub-module and an extended instruction sub-module. The basic instruction submodule is used for realizing RV32IMFA or RV32E instruction set defined by RISC-V standard. The extended instruction submodule is used for realizing a self-customized instruction set defined by a car factory or a user and is used for carrying out instruction set level acceleration on an application with special requirements.
Further optionally, when the current vehicle is in a general working state, the extended instruction set module is disabled;
when the current vehicle is in a special working state, the RISC-V kernel module enables the extended instruction submodule, and the function of the self-customization instruction set is executed.
Preferably, when the current vehicle is in a normal working state, the RISC-V kernel module enables only relevant components implemented by the RV32E instruction set, and the configuration enables 16 general integer registers to form a register set.
When the current vehicle is in a special working state, the RISC-V kernel module enables an additional 16 general integer registers, an additional 32 general floating point registers and related connecting components, so that the RISC-V kernel module supports the RV32IF instruction subset.
Further optionally, when the current vehicle is in a general working state, the RISC-V kernel module works in a machine mode defined by a RISC-V architecture;
when the current vehicle is in a special working state, the RISC-V kernel can improve the processing speed and accuracy, enable a user mode defined by a RISC-V architecture and realize resource protection at the same time.
Compared with the prior art, the vehicle-mounted terminal system based on RISC-V of the invention has the beneficial effects that:
the invention controls the working state of the RISC-V kernel module through the matching of the state monitoring module and the platform management module, and transmits data through the communication transmission module and the vehicle interface module, thereby improving the speed of data processing and transmission, accurately controlling the power consumption of the system, greatly improving the speed and precision of service processing, ensuring the safety and reliability of vehicle driving, and meeting the severe requirements of continuously developed vehicle networking on a vehicle-mounted terminal.
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FIG. 1 is a diagram of a connection framework of the present invention.
The reference information in the drawings indicates:
1. RISC-V kernel module, 2, state monitoring module, 3, platform management module, 4, communication transmission module, 5, vehicle interface module.
Detailed Description
In order to make the technical scheme, the technical problems to be solved and the technical effects of the present invention more clearly apparent, the following technical scheme of the present invention is clearly and completely described with reference to the specific embodiments.
The first embodiment is as follows:
with reference to fig. 1, the present embodiment provides a RISC-V based vehicle-mounted terminal system, which includes: RISC-V kernel module 1, state monitoring module 2, platform management module 3, communication transmission module 4, vehicle interface module 5;
the RISC-V kernel module 1 is composed of a CPU kernel which accords with the RISC-V instruction set standard;
the vehicle-mounted interface module 5 is composed of a controller local area network transceiver, and the vehicle-mounted interface module 5 is used for being physically connected with a vehicle and transmitting vehicle data;
the state monitoring module 2 is used for receiving vehicle data transmitted by the vehicle-mounted interface, analyzing and storing the data according to rules, and transmitting selected vehicle data information to the platform management module 3;
the platform management module 3 is used for performing the performance management on the RISC-V kernel module 1 and the vehicle machine interface module 5 according to the input current vehicle state information;
the communication transmission module 4 is used for transmitting the vehicle data received by the platform management module 3 to a remote end so as to realize vehicle information reporting and remote end management.
In this embodiment, the related state monitoring module 2 is configured to monitor various information of vehicle speed, acceleration, vehicle position, vehicle height, and environmental temperature and humidity within a period of time and at the current time, and divide the state and duration of each state of the current vehicle according to rules, and then transmit the state and duration of each state into the platform management module 3.
In the present embodiment, the current vehicle state includes three states, namely, an idle state, a general operating state and a special operating state.
a) When the state monitoring module 2 monitors that the vehicle is in a long-term idle state, the platform management module 3 gives a sleep instruction, so that the terminal system enters an extremely low power consumption state and returns to a general working state when the vehicle state changes;
b) when the state monitoring module 2 monitors that the vehicle is in a normal running or stopping state, the platform management module 3 gives a general working state enabling instruction, so that the terminal system enters a general working state;
c) when the state monitoring module 2 monitors that the vehicle is in an abnormal driving state, the platform management module 3 gives a special working state enabling instruction, so that the terminal system enters a special working state.
In this embodiment, RISC-V kernel module 1 supports either the RISC-V basic instruction set RV32IF or RV 32E.
In this embodiment, the RISC-V core module 1 divides the core into different power domains and clock domains, and the RISC-V core module 1 includes a basic instruction sub-module and an extended instruction sub-module. The basic instruction submodule is used for realizing RV32IMFA or RV32E instruction set defined by RISC-V standard. The extended instruction submodule is used for realizing a self-customized instruction set defined by a car factory or a user and is used for carrying out instruction set level acceleration on an application with special requirements.
In this embodiment, when the current vehicle is in a general working state, the extended instruction set module is disabled;
when the current vehicle is in a special working state, the RISC-V kernel module 1 enables the extended instruction submodule, and the self-customized instruction set function is executed.
In a specific implementation process, when the current vehicle is in a general working state, the RISC-V kernel module 1 only enables relevant components realized by the RV32E instruction set, and configures and enables 16 general integer registers to form a register set.
When the current vehicle is in a special working state, the RISC-V kernel module 1 enables an additional 16 general integer registers, an additional 32 general floating point registers and related connecting components, so that the RISC-V kernel module 1 supports the RV32IF instruction subset.
In this embodiment, when the current vehicle is in a normal operating state, the RISC-V kernel module 1 operates in a machine mode defined by the RISC-V architecture;
when the current vehicle is in a special working state, the RISC-V kernel can improve the processing speed and accuracy, enable a user mode defined by a RISC-V architecture and realize resource protection at the same time.
In summary, the vehicle-mounted terminal system based on RISC-V of the invention greatly improves the service processing speed and precision, ensures the safety and reliability of vehicle driving, and meets the severe requirements of the continuously developed vehicle networking on the vehicle-mounted terminal.
The principles and embodiments of the present invention have been described in detail using specific examples, which are provided only to aid in understanding the core technical content of the present invention. Based on the above embodiments of the present invention, those skilled in the art should make any improvements and modifications to the present invention without departing from the principle of the present invention, and therefore, the present invention should fall into the protection scope of the present invention.
Claims (8)
1. A RISC-V based vehicle-mounted terminal system, characterized in that it comprises: RISC-V kernel module, state monitoring module, platform management module, communication transmission module, vehicle interface module;
the RISC-V kernel module is composed of a CPU kernel which accords with the RISC-V instruction set standard;
the vehicle-mounted device interface module is composed of a controller local area network transceiver and is used for being physically connected with a vehicle and transmitting vehicle data;
the state monitoring module is used for receiving vehicle data transmitted by the vehicle-mounted machine interface, analyzing and storing the data according to rules, and transmitting selected vehicle data information to the platform management module;
the platform management module is used for performing the performance management on the RISC-V kernel module and the vehicle machine interface module according to the input current vehicle state information;
the communication transmission module is used for transmitting the vehicle data received by the platform management module into a remote end so as to realize vehicle information reporting and remote end management.
2. The RISC-V based vehicle terminal system of claim 1, wherein the state monitoring module is configured to monitor various information of vehicle speed, acceleration, vehicle position, vehicle height, environment temperature and humidity within a period of time and at the current time, and to divide the current vehicle state and the duration of each state according to rules, and then to transmit the state and duration to the platform management module.
3. The RISC-V based vehicle terminal system of claim 2, wherein the current vehicle state comprises three states, namely idle state, general working state and special working state;
when the state monitoring module monitors that the vehicle is in a long-term idling state, the platform management module gives a sleep instruction, so that the terminal system enters an extremely low power consumption state and returns to a general working state when the vehicle state changes;
when the state monitoring module monitors that the vehicle is in a normal running or stopping state, the platform management module gives a general working state enabling instruction to enable the terminal system to enter a general working state;
when the state monitoring module monitors that the vehicle is in an abnormal driving state, the platform management module gives a special working state enabling instruction, so that the terminal system enters a special working state.
4. A RISC-V based vehicle terminal system according to claim 3, wherein said RISC-V kernel module supports RISC-V basic instruction set RV32IF or RV 32E.
5. The RISC-V based vehicle mounted terminal system of claim 4, wherein the RISC-V kernel module divides different power domains and clock domains in the kernel, the RISC-V kernel module comprises a basic instruction sub-module and an extended instruction sub-module;
the basic instruction sub-module is used for realizing RV32IMFA or RV32E instruction set defined by RISC-V standard;
the extended instruction submodule is used for realizing a self-customized instruction set defined by a car factory or a user and is used for carrying out instruction set level acceleration on an application with special requirements.
6. The RISC-V based vehicle terminal system of claim 5, wherein the extended instruction set module is disabled when the current vehicle is in a normal operating state;
when the current vehicle is in a special working state, the RISC-V kernel module enables the extended instruction submodule, and the function of the self-customization instruction set is executed.
7. The RISC-V based vehicle terminal system of claim 6, wherein when the current vehicle state is normal, the RISC-V kernel module enables only the related components realized by RV32E instruction set, and the configuration enables 16 general integer registers to form a register set.
When the current vehicle is in a special working state, the RISC-V kernel module enables an additional 16 general integer registers, an additional 32 general floating point registers and related connecting components, so that the RISC-V kernel module supports the RV32IF instruction subset.
8. The RISC-V based vehicle terminal system of claim 6, wherein when the current vehicle is in a normal operation mode, the RISC-V kernel module operates in a machine mode defined by the RISC-V architecture;
when the current vehicle is in a special working state, the RISC-V kernel can improve the processing speed and accuracy, enable a user mode defined by a RISC-V architecture and realize resource protection at the same time.
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