CN107368301B - Serial port frame protocol implementation method, storage medium and device - Google Patents
Serial port frame protocol implementation method, storage medium and device Download PDFInfo
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- CN107368301B CN107368301B CN201710500968.4A CN201710500968A CN107368301B CN 107368301 B CN107368301 B CN 107368301B CN 201710500968 A CN201710500968 A CN 201710500968A CN 107368301 B CN107368301 B CN 107368301B
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- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
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Abstract
The invention discloses a serial port frame protocol implementation method, a storage medium and a device, wherein the method comprises the following steps: opening a serial port on a HAL layer, and creating a reading thread, a writing thread and a first socket interface for transmitting data of the serial port; an API interface for processing data is pre-established in a framework layer; when a reading thread of the HAL layer detects data sent by a serial port, the read data are transmitted to the framework layer through a first socket interface; after the frame layer receives and stores the data, any process in the Android system calls the data in the frame layer through the API; according to the method and the device, the read-write operation of the data is provided for all processes in the Android system by establishing the read thread and the write thread of the serial port, namely the data read from the same serial port can be shared among different processes, and the transportability and reusability of the data are effectively enhanced.
Description
Technical Field
The invention relates to the field of serial devices, in particular to a serial framework protocol implementation method, a storage medium and a device.
Background
The serial port device is used as an exclusive device and can be opened only by one system process, if another system process or application wants to read and write the serial port, the serial port can be opened by another process only after the opened process closes the serial port; that is, the two processes cannot open and acquire serial data at the same time.
In addition, when the Android system processes serial port data, in the prior art, read-write data is generally processed directly after a serial port device is opened in a process, and the read serial port data cannot be provided for the whole Android system process, so that the data portability and reusability are poor.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a serial port frame protocol implementation method, a storage medium and a device, and aims to solve the problem that the existing serial port data cannot be provided for the whole Android system process to use, so that the portability and reusability of the data are poor.
The technical scheme of the invention is as follows:
a serial port frame protocol implementation method comprises the following steps:
A. opening a serial port on a HAL layer, and creating a reading thread, a writing thread and a first socket interface for transmitting data of the serial port;
B. an API interface for processing data is pre-established in a framework layer;
C. when a reading thread of the HAL layer detects data sent by a serial port, the read data are transmitted to the framework layer through a first socket interface;
D. and after the framework layer receives and stores the data, any process in the Android system calls the data in the framework layer through the API.
The serial port frame protocol implementation method, wherein, after the step B, the method further comprises:
c', transmitting data to the framework layer by a process in the Android system through an API (application programming interface);
and D', the frame layer transmits the received data to the HAL layer through the first socket interface, and the HAL layer writes the data into a serial port through a write thread.
The serial port frame protocol implementation method, wherein, after the step D', the method further comprises:
e', the serial port feeds back a result to the written data, the read thread of the HAL layer transmits the feedback result to the framework layer through the first socket interface, and the framework layer processes the feedback result and then informs a process needing to call the data.
The serial port frame protocol implementation method, wherein the step B further includes:
b1, creating a second socket interface for monitoring the first socket interface in the framework layer;
the serial port frame protocol implementation method, wherein the step D further includes:
d1, when the second socket interface monitors that the HAL layer transmits data to the framework layer through the first socket interface, the framework layer is informed to read the data.
A storage medium having stored therein a plurality of instructions adapted to be loaded and executed by a processor:
opening a serial port on a HAL layer, and creating a reading thread, a writing thread and a first socket interface for transmitting data of the serial port;
an API interface for processing data is pre-established in a framework layer;
when a reading thread of the HAL layer detects data sent by a serial port, the read data are transmitted to the framework layer through a first socket interface;
and after the framework layer receives and stores the data, any process in the Android system calls the data in the framework layer through the API.
The storage medium having stored therein a plurality of instructions adapted to be loaded and executed by a processor to:
a process in the Android system transmits data to a framework layer through an API (application programming interface);
and the frame layer transmits the received data to the HAL layer through the first socket interface, and the HAL layer writes the data into a serial port through a write thread.
The storage medium having stored therein a plurality of instructions adapted to be loaded by a processor and to continue to perform:
the serial port feeds back a result to the written data, the read thread of the HAL layer transmits the feedback result to the framework layer through the first socket interface, and the framework layer processes the feedback result and then informs a process needing to call the data.
The storage medium having stored therein a plurality of instructions adapted to be loaded by a processor and to continue to perform:
creating a second socket interface for monitoring the first socket interface in the framework layer;
and when the second socket interface monitors that the HAL layer transmits data to the framework layer through the first socket interface, the framework layer is informed to read the data.
A serial port frame protocol implementation device comprises a processor, a data processing module and a data processing module, wherein the processor is suitable for implementing instructions; and the memory is suitable for storing a plurality of instructions, and the instructions are suitable for being recorded by the processor and executing the steps of any one serial port framework protocol implementation method.
Has the advantages that: the method comprises the steps that a read thread is established on an HAL layer of the Android, data sent by a serial port are read firstly, then the data are transmitted to a framework layer through a first socket interface to be processed, and the framework layer provides an API (application programming interface) for acquiring the data for the process of the whole Android system; creating a write thread on an HAL layer of the Android, providing an API (application programming interface) for writing data to the whole Android system process by a framework layer, transmitting the data to the write thread of the HAL layer by the framework layer through a first socket interface when each process or application of the Android system calls the API of the framework layer to write the data into a serial port, and finally writing the data into the serial port by the write thread; according to the method, the read-write operation of the data is provided for all processes in the Android system by creating the read thread and the write thread of the serial port, and the portability and reusability of the data are effectively enhanced.
Drawings
Fig. 1 is a flowchart of a serial framework protocol implementation method according to a preferred embodiment of the present invention.
Fig. 2 is a block diagram of a serial framework protocol implementation apparatus according to a preferred embodiment of the present invention.
Detailed Description
The invention provides a serial port frame protocol implementation method, a storage medium and a device, and further describes the invention in detail in order to make the purpose, technical scheme and effect of the invention clearer and more clear and definite. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a flowchart of a preferred embodiment of a serial frame protocol implementation method according to the present invention, as shown in the figure, the method includes the following steps:
s100, opening a serial port on a HAL layer, and creating a reading thread, a writing thread and a first socket interface for transmitting data of the serial port;
s200, an API interface for processing data is pre-established in a framework layer;
s300, when a reading thread of the HAL layer detects data sent by a serial port, transmitting the read data to the framework layer through a first socket interface;
and S400, after the frame layer receives and stores the data, any process in the Android system calls the data in the frame layer through the API.
In the prior art, two processes cannot simultaneously open a serial port and simultaneously acquire corresponding data, that is, after one process opens the serial port and reads and writes corresponding data, the data cannot be provided for other processes in an Android system to use, so that the portability and reusability of the data are poor.
In order to solve the problems in the prior art, a read thread is established on an HAL layer of the Android, data sent by a serial port is read, then the data are transmitted to a framework layer through a first socket interface to be processed, and the framework layer provides an API (application programming interface) for acquiring the data for the process of the whole Android system;
further, a write thread is established on an HAL layer of the Android, a frame layer provides an API (application programming interface) for writing data to the whole Android system process, when each process or application of the Android system calls the API of the frame layer to write data into a serial port, the frame layer transmits the data to the write thread of the HAL layer through a first socket interface, and finally the write thread writes the data into the serial port;
through the steps, the read-write operation of the data is provided for all the processes in the Android system, namely the data read from the same serial port can be shared among different processes, and the portability and reusability of the data are effectively enhanced.
Specifically, in step S10, a certain serial port is opened through an HAL layer (hardware adaptation layer) of the Android, and a read thread and a write thread of the serial port are created at the same time; since the HAL layer needs to communicate with the framework layer, a first socket interface for transferring data, which is data read from or written to the serial port, is also created on the HAL layer.
Further, step S20 specifically includes creating, in advance, an API interface for processing data and a second socket interface for monitoring the first socket interface in the framework layer; specifically, the API interface is mainly suitable for being called by other processes of the Android whole system, so that data read from a serial port can be obtained.
Further, in the step S30, the HAL layer monitors the read-write handle of the serial port in real time, and when the read thread of the HAL layer detects that data needs to be read from the serial port, the data is read from the serial port through the read thread, and then the read data is transmitted to the frame layer through the first socket interface.
Further, step S40 specifically includes, when the second socket interface monitors that the HAL layer transmits data to the framework layer through the first socket interface, notifying the framework layer to read the data and store the data; then, other processes or applications in the Android system can call the API interface created in advance in the framework layer to obtain the data stored in the framework layer.
Obviously, the method can realize the sharing of the data read from the same serial port among different processes through the steps, thereby enhancing the portability and reusability of the data.
Furthermore, the method can also realize the writing of the data in the Android system running process into the serial port, and comprises the following specific steps:
s210, transmitting data to a framework layer by a process in the Android system through an API (application programming interface);
s310, the frame layer transmits the received data to an HAL layer through the first socket interface, and the HAL layer writes the data into a serial port through a write thread;
specifically, each process in the Android system comprises the steps that if an application wants to transmit data to a serial port; data can be transmitted to a framework layer by calling an API (application programming interface) interface which is created in advance in the framework layer, and the framework layer transmits the data to an HAL (half-HAL) layer through a first socket interface after packaging the data according to a certain format; the HAL layer informs a write thread of the HAL layer to process the data after receiving the data, and writes the data into a serial port after the data is processed;
further, a serial port feeds back a result to the written data, a reading thread of the HAL layer transmits the feedback result to the framework layer through the first socket interface, and the framework layer processes the feedback result and then informs a process needing to call the data, so that the data are shared in each process.
Based on the foregoing method, the present invention further provides a storage medium, wherein a plurality of instructions are stored, the instructions being adapted to be loaded and executed by a processor to:
opening a serial port on a HAL layer, and creating a reading thread, a writing thread and a first socket interface for transmitting data of the serial port;
an API interface for processing data is pre-established in a framework layer;
when a reading thread of the HAL layer detects data sent by a serial port, the read data are transmitted to the framework layer through a first socket interface;
and after the framework layer receives and stores the data, any process in the Android system calls the data in the framework layer through the API.
The storage medium having stored therein a plurality of instructions adapted to be loaded and executed by a processor to:
a process in the Android system transmits data to a framework layer through an API (application programming interface);
and the frame layer transmits the received data to the HAL layer through the first socket interface, and the HAL layer writes the data into a serial port through a write thread.
The storage medium having stored therein a plurality of instructions adapted to be loaded by a processor and to continue to perform:
the serial port feeds back a result to the written data, the read thread of the HAL layer transmits the feedback result to the framework layer through the first socket interface, and the framework layer processes the feedback result and then informs a process needing to call the data.
The storage medium having stored therein a plurality of instructions adapted to be loaded by a processor and to continue to perform:
creating a second socket interface for monitoring the first socket interface in the framework layer;
and when the second socket interface monitors that the HAL layer transmits data to the framework layer through the first socket interface, the framework layer is informed to read the data.
Further, the invention also provides a serial port frame protocol implementation device, which comprises a processor 10, which is suitable for implementing an instruction; and a memory 20 adapted to store a plurality of instructions adapted to be recorded by the processor 10 and to perform the steps of any of the above serial interface framework protocol implementation methods.
In particular, the processor 10 may be, in some embodiments, a central processing unit, microprocessor or other data processing chip for executing program code stored in the memory 20 or processing data.
The memory 20 may in some embodiments be an internal storage unit of the device, such as a hard disk or a memory of the device. The memory 20 may also be an external memory of the device in other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), etc. provided on the device.
Further, the memory 20 may also include both an internal storage unit and an external storage device of the apparatus. The memory 20 is used for storing application software installed in the device and various types of data. The memory 20 may also be used to temporarily store data that has been output or is to be output.
In summary, according to the serial port frame protocol implementation method based on the Android platform provided by the invention, a read thread is created in advance on an HAL layer of the Android to read data sent by a serial port, then the data is transmitted to a frame layer through a first socket interface to be processed, and the frame layer provides an API interface for acquiring the data for a process of the whole Android system; creating a write thread on an HAL layer of the Android, providing an API (application programming interface) for writing data to the whole Android system process by a framework layer, transmitting the data to the write thread of the HAL layer by the framework layer through a first socket interface when each process or application of the Android system calls the API of the framework layer to write the data into a serial port, and finally writing the data into the serial port by the write thread; according to the method, the read-write operation of the data is provided for all processes in the Android system by creating the read thread and the write thread of the serial port, and the portability and reusability of the data are effectively enhanced.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (10)
1. A serial port frame protocol implementation method is characterized by comprising the following steps:
A. opening a serial port on a HAL layer, and creating a reading thread, a writing thread and a first socket interface for transmitting data of the serial port;
B. an API interface for processing data is pre-established in a framework layer;
C. when a reading thread of the HAL layer detects data sent by a serial port, the read data are transmitted to the framework layer through a first socket interface;
D. after the frame layer receives and stores the data, any process in the Android system calls the data in the frame layer through the API;
when the process of the Android system calls an API (application programming interface) of the framework layer to write data into the serial port, the framework layer transmits the data to a write-in thread of the HAL (native access stratum) layer through a first socket interface, and finally the write-in thread writes the data into the serial port;
and different processes share the data read from the same serial port.
2. The serial port framework protocol implementation method according to claim 1, further comprising, after the step B:
c', transmitting data to the framework layer by a process in the Android system through an API (application programming interface);
and D', the frame layer transmits the received data to the HAL layer through the first socket interface, and the HAL layer writes the data into a serial port through a write thread.
3. The serial port framework protocol implementation method according to claim 2, further comprising, after the step D':
e', the serial port feeds back a result to the written data, the read thread of the HAL layer transmits the feedback result to the framework layer through the first socket interface, and the framework layer processes the feedback result and then informs a process needing to call the data.
4. The method for implementing the serial port framework protocol according to claim 1, wherein the step B further comprises:
and B1, creating a second socket interface for monitoring the first socket interface in the framework layer.
5. The serial port framework protocol implementation method of claim 4, wherein the step D further comprises:
d1, when the second socket interface monitors that the HAL layer transmits data to the framework layer through the first socket interface, the framework layer is informed to read the data.
6. A storage medium having stored thereon a plurality of instructions adapted to be loaded by a processor and executed to:
opening a serial port on a HAL layer, and creating a reading thread, a writing thread and a first socket interface for transmitting data of the serial port;
an API interface for processing data is pre-established in a framework layer;
when a reading thread of the HAL layer detects data sent by a serial port, the read data are transmitted to the framework layer through a first socket interface;
after the frame layer receives and stores the data, any process in the Android system calls the data in the frame layer through the API;
when the process of the Android system calls an API (application programming interface) of the framework layer to write data into the serial port, the framework layer transmits the data to a write-in thread of the HAL (native access stratum) layer through a first socket interface, and finally the write-in thread writes the data into the serial port;
and different processes share the data read from the same serial port.
7. The storage medium of claim 6, having stored thereon a plurality of instructions adapted to be loaded and executed by a processor to:
a process in the Android system transmits data to a framework layer through an API (application programming interface);
and the frame layer transmits the received data to the HAL layer through the first socket interface, and the HAL layer writes the data into a serial port through a write thread.
8. The storage medium of claim 7, having stored thereon a plurality of instructions adapted to be loaded by a processor and to continue to perform:
the serial port feeds back a result to the written data, the read thread of the HAL layer transmits the feedback result to the framework layer through the first socket interface, and the framework layer processes the feedback result and then informs a process needing to call the data.
9. The storage medium of claim 6, having stored thereon a plurality of instructions adapted to be loaded by a processor and to continue to perform:
creating a second socket interface for monitoring the first socket interface in the framework layer;
and when the second socket interface monitors that the HAL layer transmits data to the framework layer through the first socket interface, the framework layer is informed to read the data.
10. A serial port frame protocol implementation device is characterized by comprising a processor, a data processing module and a data processing module, wherein the processor is suitable for implementing instructions; and a memory adapted to store a plurality of instructions adapted to be loaded by the processor and to perform the steps of the serial framework protocol implementation method of any of the preceding claims 1-5.
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