CN111417179A - Embedded low-power-consumption dual-chip 4G Internet of things communication method and system - Google Patents
Embedded low-power-consumption dual-chip 4G Internet of things communication method and system Download PDFInfo
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Abstract
The invention discloses a dual-chip 4G Internet of things communication method and system based on embedded low power consumption, which comprises the steps of establishing a first communication task in a graphic control intelligent device, establishing a B L E task, a serial communication task and a second communication task respectively by utilizing an RTOS (remote terminal operating system), establishing a B L E communication intelligent system, periodically polling the second communication task by utilizing an SPI (serial peripheral interface) protocol interface by utilizing the first communication task, collecting and processing polled communication data, transmitting the communication data into a 4G module by utilizing the serial communication task, and executing corresponding instructions.
Description
Technical Field
The invention relates to the technical field of 4G Internet of things communication, in particular to a dual-chip 4G Internet of things communication method and system based on embedded low power consumption.
Background
The internet of things has received wide attention in recent years due to the advantages of high automation degree, flexible networking mode, fast information transmission and the like. The sensor system is used as an indispensable part of the Internet of things, and plays a vital role in improving the information acquisition and perception performance of the Internet of things. So far, the research on the sensor system of the internet of things is still in the initial stage of starting, and various technologies are not mature.
With the development demand of the internet of things becoming higher and higher, the requirements on transmission communication technology are also becoming higher and higher, and the traditional wireless communication technology of the internet of things, such as 2.4GHz WiFi technology, Bluetooth technology, Zigbee technology and the like which form a local area network, is adopted; 2G/3G/4G and the like which form a wide area network have the contradiction that only one of the remote distance and the low power consumption can be selected. Therefore, a low-power-consumption double-chip 4G Internet of things communication method is provided for the problems in the Internet of things wireless communication technology.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The invention is provided in view of the problems of high power consumption and long endurance of the existing 4G module.
Therefore, the invention provides the embedded low-power-consumption double-chip 4G Internet of things communication method, which can reduce the power consumption of the CPU.
In order to solve the technical problems, the technical scheme includes that a first communication task is established in the intelligent graphic control equipment, a B L E task, a serial communication task and a second communication task are respectively established by using an RTOS (remote terminal operating System), a B L E communication intelligent system is established, the first communication task periodically polls the second communication task by using an SPI (Serial peripheral interface) protocol interface, polled communication data are collected and processed, and the communication data are transmitted into a 4G module by using the serial communication task to execute corresponding instructions.
The preferable scheme of the embedded low-power-consumption double-chip 4G Internet of things communication method includes the steps that the first communication task is established, the graphic control intelligent device is connected with the B L E communication intelligent system through the SPI protocol interface, the SPI speed reaches 50Mbps, the first communication task adopts a polling strategy, the graphic control intelligent device of a main stack initiates inquiry about whether communication data are contained or not to the B L E communication intelligent system every 5s, the communication data to be sent are transmitted to the B L E communication intelligent system, if the communication task is in a low-power-consumption state, the SPI speed is reduced to 20Mbps in a rotating mode, inquiry about whether the communication data are contained or not is initiated to the B L E communication intelligent system every 10s, the first communication task and the communication data received in a polling mode in the low-power-consumption state are processed simultaneously, and scheduling is conducted through a time impeller strategy.
The invention relates to a preferable scheme of an embedded low-power-consumption-based dual-chip 4G Internet of things communication method, wherein the method comprises the following steps: the first communication task polls the second communication task periodically, wherein the first communication task 6s polls the second communication task once if the display module is in a bright screen state; and if the display module is in the low power consumption state, the first communication task 60s polls the second communication task once.
The preferable scheme of the embedded low-power-consumption dual-chip 4G Internet of things-based communication method is that the first communication task collects and processes the polled communication data, and comprises the steps that the graphic control intelligent device and the B L E communication intelligent system carry out communication transmission by using a small segment mode strategy, and a parity bit strategy is adopted to check the received communication data in the transmission process.
The B L E task is established, the B L E protocol stack is established and is adapted to a Bluetooth communication protocol of a terminal, the B L E task is connected with the terminal through Bluetooth, the communication data are transmitted with the 4G module through a serial port, the communication data of the 4G module are forwarded to the graphic control intelligent device, and when the terminal initiates an OTA command, the B L E task informs the graphic control intelligent device to perform OTA upgrading.
The invention relates to a preferable scheme of an embedded low-power-consumption-based dual-chip 4G Internet of things communication method, wherein the method comprises the following steps: the serial port communication task comprises the step of receiving the communication data sent and received by the 4G module by using the serial port.
The invention relates to a preferable scheme of an embedded low-power-consumption-based dual-chip 4G Internet of things communication method, wherein the method comprises the following steps: the second communication task comprises sending and receiving the data stream of the first communication task.
The communication data are transmitted to the 4G module by using the serial port communication task to execute the instruction, the preferred scheme comprises that if the communication data are in an asynchronous communication mode, an interface automatically generates a start-stop frame data format, if the communication data are in a character-oriented synchronous mode, the interface adds synchronous characters in front of the data to be transmitted, when the B L E communication intelligent system sends the data, parallel data are converted into serial data, a serial communication interface circuit selects and controls the data transmission rate, when the data are sent, the interface circuit automatically generates parity check bits for the transmitted character data, when the data are received, the interface circuit checks the parity check bits of the characters to determine whether error transmission occurs, and a CPU and the terminal both adopt TT L level and positive logic and carry out conversion in the interface circuit.
The invention relates to a preferable scheme of an embedded low-power-consumption double-chip 4G Internet of things-based communication system, which comprises the following steps: the system comprises a 4G module, a control module and a control module, wherein the 4G module is used for integrating radio frequency and a baseband on a PCB platelet, completing wireless receiving, transmitting and baseband signal processing, and supporting voice dialing, short message receiving and sending and dialing networking; the display module is used for displaying an information interface and helping a user to obtain information dynamics in real time; the communication module is used for receiving and sending the communication information and is a connector for transmitting different signals, so that the serial information of the driving, controlling and braking components in the system architecture is compatible; the input/output management module is used for transmitting the data stream of the communication information and managing the sending and receiving of the check code; the data center module is used for storing the obtained communication information, image information and other data information; and the master control module is used for allocating the transmission of the communication information, controlling the display module to be in a bright screen or information screen state and reducing the energy consumption of the system.
The method has the advantages that the 4G module is dynamically started through the image control chip and the B L E communication chip, meanwhile, an embedded strategy is adopted, the power consumption of the CPU is greatly reduced by using the MCU of the Cortex-M kernel, the ultra-long endurance is realized, the performance difference of the MCU relative to the MPU is made up through the advantages of the framework, and the basic requirements of wireless communication are met.
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In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is a schematic flow chart of a dual-chip 4G internet of things communication method based on embedded low power consumption according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of dual-chip communication transmission of an embedded low-power-consumption dual-chip 4G internet of things-based communication method according to a first embodiment of the present invention;
fig. 3 is a schematic diagram of an overall communication framework of a dual-chip 4G internet of things based on an embedded low-power-consumption dual-chip 4G internet of things communication method according to a first embodiment of the present invention;
fig. 4 is a schematic diagram of data transmission of a dual-chip 4G internet of things communication protocol interface of a dual-chip 4G internet of things communication method based on an embedded low-power-consumption dual-chip 4G internet of things according to a first embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a distribution of a module structure of an embedded low-power-consumption dual-chip 4G internet of things communication system according to a second embodiment of the present invention;
fig. 6 is a schematic diagram of a system network structure distribution of an embedded low-power-consumption dual-chip 4G internet of things-based communication system according to a second embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, specific embodiments accompanied with figures are described in detail below, and it is apparent that the described embodiments are a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not enlarged partially in general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Meanwhile, in the description of the present invention, it should be noted that the terms "upper, lower, inner and outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation and operate, and thus, cannot be construed as limiting the present invention. Furthermore, the terms first, second, or third are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted, connected and connected" in the present invention are to be understood broadly, unless otherwise explicitly specified or limited, for example: can be fixedly connected, detachably connected or integrally connected; they may be mechanically, electrically, or directly connected, or indirectly connected through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1 to 4, a first embodiment of the present invention provides an embedded low-power-consumption dual-chip 4G internet of things communication method, including:
s1: and establishing a first communication task in the intelligent graphic control equipment. It should be noted that, establishing the first communication task includes:
the intelligent graphic control equipment is connected with a B L E communication intelligent system by using an SPI protocol interface, and the SPI speed reaches 50 Mbps;
the first communication task adopts a polling strategy, the intelligent equipment controlled by the graph of the main stack initiates an inquiry about whether communication data is contained to the B L E communication intelligent system every 5s, and the communication data to be sent is transmitted to the B L E communication intelligent system;
if the communication data is in a low power consumption state, the SPI speed is reduced to 20Mbps, and an inquiry whether the communication data is contained or not is initiated to a B L E communication intelligent system every 10 s;
and the first communication task and the communication data received by polling in the low-power consumption state are processed simultaneously, and scheduling is performed by utilizing a time impeller rotation strategy.
S2, establishing a B L E task, a serial communication task and a second communication task respectively by utilizing the RTOS, and establishing a B L E communication intelligent system, wherein the step needs to be explained is to establish the B L E task, and the step comprises the following steps:
constructing a B L E protocol stack which is adapted to a Bluetooth communication protocol of a terminal;
the B L E task is connected with a terminal by Bluetooth, transmits communication data with the 4G module 100 by a serial port, and forwards the communication data of the 4G module 100 to the intelligent graphic control equipment;
when the terminal initiates the OTA command, the B L E task notifies the graphics-controlled smart device to perform OTA upgrade.
The serial port communication task comprises the following steps:
the receiving 4G module 100 sends and receives communication data by using a serial port.
The second communication task comprises:
and sending and receiving the data stream of the first communication task.
S3: the first communication task utilizes an SPI protocol interface to periodically poll the second communication task, and polling communication data are collected and processed. It should be further noted that, the periodically polling the second communication task by the first communication task includes:
if the display module 200 is in a bright screen state, the first communication task 6s polls the second communication task once;
if the display module 200 is in the low power consumption state, the first communication task 60s polls the second communication task once.
Specifically, the collecting and processing of the polled communication data by the first communication task includes:
the intelligent graphic control equipment and the B L E communication intelligent system carry out communication transmission by utilizing a small-segment mode strategy, and a parity bit strategy is adopted to check received communication data in the transmission process.
S4: the communication data is transmitted to the 4G module 100 by using the serial port communication task, and a corresponding instruction is executed. It should be further noted that the communication data is transmitted to the 4G module 100 by using the serial port communication task to execute the instruction, including:
if the data is in an asynchronous communication mode, the interface automatically generates a start-stop frame data format, and if the data is in a character-oriented synchronous mode, the interface adds synchronous characters in front of the data to be transmitted;
when the B L E communication intelligent system sends data, parallel data is converted into serial data, and the serial communication interface circuit selects and controls the data transmission rate;
during sending, the interface circuit automatically generates a parity check bit for the transmitted character data, and during receiving, the interface circuit checks the parity check bit of the character to determine whether error transmission occurs;
the CPU and the terminal both adopt TT L level and positive logic and perform conversion in the interface circuit.
Preferably, referring to fig. 3, the implementation of the low-power-consumption task is mainly an RTOS low-power-consumption policy, which is further described in this embodiment, the RTOS adopts a preemptive task scheduling mechanism based on time slice rotation, enters a low-power-consumption mode when an idle task runs, and wakes up the MCU through an interrupt or an external event under a proper condition; the MCU is also woken up from the low power mode whenever the timer in the RTOS generates an interrupt, and frequent entering into sleep and waking up makes the MCU unable to enter into deep sleep.
The method of the invention enables the MCU to be in a low power consumption mode for a longer time, and comprises four tasks which are respectively as follows: the Task A is a periodic Task, the Task B is a periodic Task, the Task C is a burst Task, the Task D is a periodic Task, and four idle periods exist between the scheduling of the four tasks (at the moment, the RTOS schedules the idle Task to run, and the aim of software design is to enable the MCU to be in a low power consumption mode when the idle Task runs as far as possible).
Specifically, during the operation of the ld task, a system clock tick is generated once, the MCU is woken up at this time, and after the wake-up, the MCU enters a low power consumption mode, the wake-up is meaningless, and it is expected that the MCU is always in the low power consumption mode during the ld 1, so that the system timer interrupt is properly adjusted so that the system clock interrupt is not triggered at T1, and the interrupt trigger point is set to be when TaskB arrives; the task wakes up the MCU (external event) before the system tick arrives, and the MCU can be always in a low power consumption mode in the lde 2; the ldle3 time is short, and if this event is short, it is less meaningful to enter the low power mode, so the software should add a policy when entering the low power mode.
The method can reasonably enter a low power consumption mode, avoids frequently causing the MCU to carry out unnecessary switching between the low power consumption mode and the running mode, the system clock of the RTOS is sourced from a certain periodic timer of hardware (the Cortex-M series of kernels mostly adopt SYSTIck), the task scheduler of the RTOS can expect the triggering time of the next periodic task, adjust the interruption triggering time of the system clock timer, and avoid the RTOS from entering unnecessary time interruption, thereby staying in the low power consumption mode for a longer time, and the clock of the RTOS is not periodic but dynamic at the moment. When the MCU is awakened, compensation is provided for the system clock in a certain mode, the MCU can be awakened in two situations, the dynamically adjusted system clock is interrupted or an unexpected external event occurs, in any case, the time of the MCU in the low power consumption mode can be calculated through a certain timer running in the low power consumption mode, and software compensation is carried out on the system time after the MCU is awakened.
Referring to fig. 4, when the terminal device is connected to the B L E communication chip, external communication data exchange and presentation are performed between the B L E communication chip and the graphics chip, when the terminal device is not connected to the B L E communication chip, the B L E communication chip wakes up the communication data outside the 4G module in deep sleep through the serial port, the communication data are transmitted to the B L E communication chip through the 4G module, and the B L E communication chip forwards and pushes a data stream to the graphics chip for data exchange and presentation.
Preferably, in order to verify and explain the technical effect adopted in the method of the present invention, the present embodiment selects the existing smart communication watch endurance method and the dual-chip 4G internet of things communication method of the present invention to perform a comparative test, and compares the test results by means of scientific demonstration to verify the real effect of the method of the present invention. In order to verify that the method of the invention has longer cruising ability compared with the prior art, in the embodiment, TiCWatch Pro, HUA WEI Watch 2Pro, Samsung Gear S3, Apple Watch and the double-chip 4G Internet of things communication are adopted for real-time measurement and comparison, and the test results are shown in the following table:
table 1: and (5) comparing test results with a table.
Referring to table 1, when the TicWatch Pro, the HUA WEI Watch 2Pro, the three star Gear S3 and the Apple Watch are charged fully at the same time, and the WiFi and the Bluetooth are turned on, only the endurance capacity of the TicWatch Pro is slightly stronger, but the method starts the 4G module to communicate under the same full-power condition, and the endurance capacity is 2 times of the TicWatch Pro.
Example 2
Referring to fig. 5 and 6, a second embodiment of the present invention is different from the first embodiment in that an embedded low-power-consumption dual-chip 4G internet of things communication system is provided, including:
the 4G module 100 is configured to integrate radio frequency and baseband on a PCB platelet, to complete wireless reception, transmission, and baseband signal processing, and to support voice dialing, short message transceiving, and dial networking.
And the display module 200 is used for displaying an information interface and helping a user to obtain information dynamics in real time.
The communication module 300 is a connector for transmitting different signals, so that the serial messages of the driving, controlling and braking components in the system architecture are compatible.
The input/output management module 400 is configured to transmit a data stream of the communication information and manage sending and receiving of the check code.
And the data center module 500 is used for storing the obtained communication information, image information and other data information.
The main control module 600 is used for allocating transmission of communication information, controlling the display module 200 to be in a bright screen or information screen state, and reducing system energy consumption.
It should be recognized that embodiments of the present invention can be realized and implemented by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer readable memory. The methods may be implemented in a computer program using standard programming techniques, including a non-transitory computer-readable storage medium configured with the computer program, where the storage medium so configured causes a computer to operate in a specific and predefined manner, according to the methods and figures described in the detailed description. Each program may be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language. Furthermore, the program can be run on a programmed application specific integrated circuit for this purpose.
Further, the operations of processes described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The processes described herein (or variations and/or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) collectively executed on one or more processors, by hardware, or combinations thereof. The computer program includes a plurality of instructions executable by one or more processors.
Further, the method may be implemented in any type of computing platform operatively connected to a suitable interface, including but not limited to a personal computer, mini computer, mainframe, workstation, networked or distributed computing environment, separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, and the like. Aspects of the invention may be embodied in machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, optically read and/or write storage medium, RAM, ROM, or the like, such that it may be read by a programmable computer, which when read by the storage medium or device, is operative to configure and operate the computer to perform the procedures described herein. Further, the machine-readable code, or portions thereof, may be transmitted over a wired or wireless network. The invention described herein includes these and other different types of non-transitory computer-readable storage media when such media include instructions or programs that implement the steps described above in conjunction with a microprocessor or other data processor. The invention also includes the computer itself when programmed according to the methods and techniques described herein. A computer program can be applied to input data to perform the functions described herein to transform the input data to generate output data that is stored to non-volatile memory. The output information may also be applied to one or more output devices, such as a display. In a preferred embodiment of the invention, the transformed data represents physical and tangible objects, including particular visual depictions of physical and tangible objects produced on a display.
As used in this application, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being: a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of example, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers. In addition, these components can execute from various computer readable media having various data structures thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from one component interacting with another component in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (9)
1. A dual-chip 4G Internet of things communication method based on embedded low power consumption is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
establishing a first communication task in the intelligent graphic control equipment;
respectively establishing a B L E task, a serial communication task and a second communication task by utilizing an RTOS (remote terminal operating System), and establishing a B L E communication intelligent system;
the first communication task periodically polls the second communication task by using an SPI protocol interface, and collects and processes polled communication data;
and the communication data is transmitted to the 4G module (100) by utilizing the serial port communication task, and corresponding instructions are executed.
2. The embedded low-power-consumption-based dual-chip 4G Internet of things communication method of claim 1, wherein: establishing the first communication task, including,
the intelligent graphic control equipment is connected with the B L E communication intelligent system by utilizing the SPI protocol interface, and the SPI speed reaches 50 Mbps;
the first communication task adopts a polling strategy, the intelligent graphics control equipment of the main stack initiates an inquiry about whether the communication data is contained to the B L E communication intelligent system every 5s, and transmits the communication data to be sent to the B L E communication intelligent system;
if the communication data is in a low power consumption state, the SPI speed is reduced to 20Mbps, and an inquiry whether the communication data is contained or not is sent to the B L E communication intelligent system every 10 s;
and the first communication task and the communication data received by polling in the low power consumption state are processed simultaneously, and scheduling is performed by utilizing a time impeller rotation strategy.
3. The embedded low-power-consumption-based dual-chip 4G Internet of things communication method of claim 1 or 2, wherein: the first communication task periodically polls the second communication task, including,
if the display module (200) is in a bright screen state, the first communication task 6s polls the second communication task once;
and if the display module (200) is in the low power consumption state, the first communication task 60s polls the second communication task once.
4. The embedded low-power-consumption-based dual-chip 4G Internet of things communication method of claim 3, wherein: the first communication task collects and processes the polled communication data, including,
the intelligent graphic control equipment and the B L E communication intelligent system carry out communication transmission by utilizing a small-section mode strategy, and a parity check bit strategy is adopted to check the received communication data in the transmission process.
5. The embedded low-power-consumption-based dual-chip 4G Internet of things communication method as claimed in claim 1, wherein the B L E task is established by the following steps,
constructing a B L E protocol stack which is adapted to a Bluetooth communication protocol of a terminal;
the B L E task is connected with the terminal through Bluetooth, transmits the communication data with the 4G module (100) through a serial port, and forwards the communication data of the 4G module (100) to the intelligent graphic control equipment;
and when the terminal initiates an OTA command, the B L E task informs the graphic control intelligent device to perform OTA upgrading.
6. The embedded low-power-consumption-based dual-chip 4G Internet of things communication method of claim 1, wherein: the serial port communication task comprises the step of receiving the communication data sent and received by the 4G module (100) through the serial port.
7. The embedded low-power-consumption-based dual-chip 4G Internet of things communication method of claim 1, wherein: the second communication task comprises sending and receiving the data stream of the first communication task.
8. The embedded low-power-consumption-based dual-chip 4G Internet of things communication method of claim 1 or 6, wherein: the communication data is transmitted to the 4G module (100) by utilizing the serial port communication task to execute the command, comprising,
if the data is in an asynchronous communication mode, an interface automatically generates a start-stop frame data format, and if the data is in a character-oriented synchronous mode, the interface adds synchronous characters in front of the data to be transmitted;
when the B L E communication intelligent system sends the data, parallel data are converted into serial data, and a serial communication interface circuit selects and controls the speed of data transmission;
during transmission, the interface circuit automatically generates the parity bit for the transmitted character data, and during reception, the interface circuit checks the parity bit of the character to determine whether error transmission occurs;
the CPU and the terminal both adopt TT L level and positive logic and perform conversion in the interface circuit.
9. The utility model provides a two chip 4G thing networking communication system based on embedded low-power consumption which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the 4G module (100) is used for integrating radio frequency and a baseband on a PCB platelet, completing wireless receiving, transmitting and baseband signal processing, and supporting voice dialing, short message receiving and sending and dialing networking;
the display module (200) is used for displaying an information interface and helping a user to obtain information dynamics in real time;
the communication module (300) is a connector for receiving and sending the communication information and transmitting different signals, so that the serial information of the driving, controlling and braking components in the system architecture is compatible;
an input/output management module (400) for transmitting the data stream of the communication information and managing the transmission and reception of check codes;
the data center module (500) is used for storing the obtained communication information, image information and other data information;
and the master control module (600) is used for allocating the transmission of the communication information, controlling the display module (200) to be in a bright screen or information screen state and reducing the energy consumption of the system.
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