CN114095954B - UART-based wireless communication module upgrading method - Google Patents
UART-based wireless communication module upgrading method Download PDFInfo
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- CN114095954B CN114095954B CN202111176662.0A CN202111176662A CN114095954B CN 114095954 B CN114095954 B CN 114095954B CN 202111176662 A CN202111176662 A CN 202111176662A CN 114095954 B CN114095954 B CN 114095954B
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- 230000004044 response Effects 0.000 claims description 9
- 238000012795 verification Methods 0.000 claims description 6
- 230000005856 abnormality Effects 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
- H04L41/082—Configuration setting characterised by the conditions triggering a change of settings the condition being updates or upgrades of network functionality
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Abstract
The invention provides a UART-based wireless communication module upgrading method in the technical field of wireless communication, which comprises the following steps: step S10, checking an upgrade file of a preset file path by the upper computer; step S20, initializing a UART port of the wireless communication module by the upper computer; step S30, the upper computer sets the wireless communication module to be in an upgrade state through the initialized UART port; step S40, the upper computer transmits the upgrade file to the wireless communication module through the initialized UART port based on an asynchronous transmission protocol; and step S50, the wireless communication module executes upgrading operation based on the received upgrading file. The invention has the advantages that: the flexibility, convenience and stability of the wireless communication module upgrading are greatly improved.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a UART-based wireless communication module upgrading method.
Background
The wireless communication module is a hardware module for wireless internet surfing, and the wireless communication module is connected to a hardware system, namely, the wireless communication module can serve as a network card to provide an internet surfing function for a main board (an upper computer), for example, the LTE communication module is a hardware module capable of identifying a 4G SIM card to perform internet surfing.
The wireless communication module is widely applied to mobile phones, but with the rapid development of embedded and internet of things industry, the wireless communication module is applied to more and more devices with different uses, and in order to cope with various complex network environments and changeable functional requirements, the wireless communication module is often required to be upgraded. For upgrading of wireless communication modules, there are conventionally two methods:
the method one is OTA upgrade, namely, automatically downloads the upgrade package on line for updating; however, when the software of the wireless communication module itself has defects and cannot be networked, OTA upgrading cannot be performed.
The second method is firmware programming overlay upgrade; according to the method, the wireless communication module is required to be removed from the original equipment, and is installed after being programmed by using a computer, so that the upgrading process is troublesome, the operation is unstable, and the batch operation cannot be performed.
Therefore, how to provide a UART-based wireless communication module upgrading method to achieve flexibility, convenience and stability of upgrading a wireless communication module becomes a problem to be solved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a UART-based wireless communication module upgrading method for improving flexibility, convenience and stability of wireless communication module upgrading.
The invention is realized in the following way: a UART-based wireless communication module upgrading method comprises the following steps:
step S10, checking an upgrade file of a preset file path by the upper computer;
step S20, initializing a UART port of the wireless communication module by the upper computer;
step S30, the upper computer sets the wireless communication module to be in an upgrade state through the initialized UART port;
step S40, the upper computer transmits the upgrade file to the wireless communication module through the initialized UART port based on an asynchronous transmission protocol;
and step S50, the wireless communication module executes upgrading operation based on the received upgrading file.
Further, the step S10 specifically includes:
the method comprises the steps that a file path and an inspection period are preset by the upper computer, and when the upper computer detects that external storage equipment is accessed, upgrade files stored by the external storage equipment are automatically copied to the file path;
the upper computer automatically checks whether the file path stores the upgrade file or not every the check period, if yes, the step S20 is entered; if not, continuing to check.
Further, the step S20 specifically includes:
after the upper computer clears the buffer data of the UART port, the communication parameters of the UART port are configured, and then the initialization of the UART port is completed.
Further, the step S30 specifically includes:
and the upper computer sends an AT instruction carrying the working mode to the wireless communication module through the initialized UART port, and the wireless communication module adjusts the working mode from the instruction mode to the transparent transmission mode based on the received AT instruction and feeds back a response instruction for finishing the upgrade state setting to the upper computer.
Further, the step S40 specifically includes:
step S41, the upper computer sets a time interval and a time length threshold, and the upper computer detects whether a response instruction is received at intervals, if yes, the step S43 is entered; if not, go to step S42;
step S42, the upper computer detects whether the duration from the current time to the time of sending the AT command exceeds a duration threshold value, if yes, the abnormality of the wireless communication module is indicated, and the process is ended; if not, go to step S41;
step S43, the upper computer acquires a check identifier from the wireless communication module through the initialized UART port based on the received response instruction; the value of the check identifier is CRC check or sum check;
step S44, presetting a file size by the upper computer, dividing the upgrade file into a plurality of upgrade subfiles based on the file size, calculating the check code of each upgrade subfile based on the check identifier, and adding the calculated check code into the corresponding upgrade subfile;
step S45, the upper computer sequentially transmits the upgrade subfiles to the wireless communication module through the initialized UART port based on an asynchronous transmission protocol, and closes the UART port after the transmission is completed.
Further, in the step S44, the file size is 1024 bytes.
Further, in the step S44, the dividing the upgrade file into a plurality of upgrade subfiles based on the file size is specifically:
dividing the upgrade file into a plurality of upgrade sub-files with the size of the file, and filling preset characters until the size of the file is met when the size of the last upgrade sub-file does not meet the size of the file.
Further, the step S45 specifically includes:
step S451, the upper computer transmits the first upgrade sub-file to the wireless communication module through the initialized UART port based on the asynchronous transmission protocol;
step S452, the wireless communication module receives the upgrade sub-file, checks the upgrade sub-file based on a check code carried by the upgrade sub-file, and if the upgrade sub-file passes the check, feeds back a check result to the upper computer, and enters step S453; if the verification fails, feeding back a verification failure result to the upper computer, and proceeding to step S451;
step S453, the upper computer sends the next upgrading sub-file to the wireless communication module and checks based on the received check passing result, and so on;
step S454, the upper computer judges whether all the upgrade sub-files are sent, if yes, a first instruction of completing the upgrade file sending is sent to the wireless communication module, and the step S455 is carried out; if not, go to step S453;
step S455, the wireless communication module determines whether to complete the reception of all the upgrade sub-files based on the received first instruction, if yes, sends a second instruction to the upper computer that the reception of the upgrade file is completed, and proceeds to step S456; if not, go to step S453;
and step 456, the upper computer closes the UART port based on the received second instruction.
Further, the step S50 specifically includes:
step S51, after the wireless communication module receives the upgrade file, restarting operation is executed, the upper computer monitors the UART port of the wireless communication module, judges whether the UART port is online again within a preset time period, if so, indicates that the wireless communication module enters an upgrade mode, and then the step S52 is executed; if not, the wireless communication module is not in the upgrading mode, and the process is ended;
and step S52, the wireless communication module feeds back the upgrading progress to the upper computer in real time through the UART port, and the upper computer restarts the wireless communication module to finish upgrading after judging that the wireless communication module is upgraded based on the upgrading progress.
Further, the step S52 further includes:
the upper computer indicates the upgrading progress through a display screen or an indicator lamp.
The invention has the advantages that:
1. the upgrade file stored by the external storage device is automatically copied to the preset file path, whether the upgrade file is stored in the file path is periodically checked, and the upgrade operation is automatically executed when the upgrade file is stored, namely, after the UART port of the wireless communication module is initialized, the wireless communication module is set to be in an upgrade state, and the upgrade file is transmitted to the wireless communication module through the UART port to execute the upgrade operation, so that the wireless communication module can be upgraded under the condition without a network, the situation that the OTA upgrade cannot be carried out in the prior art is avoided, the wireless communication module is not required to be removed from the original device, and the flexibility and the convenience of the upgrade of the wireless communication module are greatly improved.
2. The upgrade file is divided into a plurality of equal-sized upgrade subfiles, the check codes are calculated based on the check mode supported by the wireless communication module, the upgrade subfiles are transmitted to the wireless communication module through an asynchronous transmission protocol and checked, when the check fails, the corresponding upgrade subfiles are retransmitted, and after the transmission of the upgrade subfiles is completed, the bidirectional check is carried out, so that the upper computer is ensured to be completely transmitted, the wireless communication module is completely received, the integrity and the correctness of the upgrade file received by the wireless communication module are ensured, the upgrade failure caused by the error of the upgrade file is avoided, and the upgrade stability of the wireless communication module is greatly improved.
Drawings
The invention will be further described with reference to examples of embodiments with reference to the accompanying drawings.
Fig. 1 is a flowchart of a UART-based wireless communication module upgrading method according to the present invention.
Detailed Description
According to the technical scheme in the embodiment of the application, the overall thought is as follows: when the fact that the upgrading file is stored in the preset file path is detected, initializing a UART port of the wireless communication module, setting the wireless communication module to be in an upgrading state, and transmitting the upgrading file to the wireless communication module through the UART port to execute upgrading operation, so that the wireless communication module can be upgraded under the condition that a network does not exist, and the flexibility and convenience of upgrading the wireless communication module are improved; the upgrade file is divided into a plurality of upgrade subfiles, a check code is calculated based on a check mode supported by the wireless communication module, each upgrade subfile is transmitted to the wireless communication module through an asynchronous transmission protocol and checked, when the check fails, the corresponding upgrade subfile is retransmitted, and whether the transmission of all upgrade subfiles is completed is checked in a two-way mode, so that the integrity and the correctness of the upgrade file received by the wireless communication module are ensured, and the upgrade stability of the wireless communication module is improved.
Referring to fig. 1, a preferred embodiment of a UART-based wireless communication module upgrading method according to the present invention includes the following steps:
step S10, the upper computer checks the upgrade file of the preset file path, namely, checks whether the upgrade file exists or not;
step S20, initializing a UART port of the wireless communication module by the upper computer; the wireless communication module is a 2G communication module, a 3G communication module, a 4G communication module, a 5G communication module, an NB-IOT communication module, a LORA communication module, a WIFI communication module, a Bluetooth communication module or a ZigBee communication module;
step S30, the upper computer sets the wireless communication module to be in an upgrade state through the initialized UART port;
step S40, the upper computer transmits the upgrade file to the wireless communication module through the initialized UART port based on an asynchronous transmission protocol; the asynchronous transmission protocol is preferably XMODEM-1K protocol;
and step S50, the wireless communication module executes upgrading operation based on the received upgrading file.
The local upgrade file is transmitted to the wireless communication module through the UART port for upgrade operation.
The step S10 specifically includes:
the method comprises the steps that a file path and an inspection period are preset by the upper computer, and when the upper computer detects that external storage equipment is accessed, upgrade files stored by the external storage equipment are automatically copied to the file path;
the upper computer automatically checks whether the file path stores the upgrade file or not every the check period, if yes, the step S20 is entered; if not, continuing to check.
In specific implementation, the upgrade file can be identified through a plurality of modes such as a U disk, TFTP, NFS and the like to carry out upgrade operation. The upper computer monitors whether the file path has an upgrade file or not through a Linux inotify mechanism, and waits until the upgrade file is created, the upgrade operation is automatically started.
The step S20 specifically includes:
after the upper computer clears the buffer data of the UART port through the tcflush function, the communication parameters of the UART port are configured through the Linux termios series function and the tcsetattr function, and then the initialization of the UART port is completed. The communication parameters include baud rate, parity bits, stop bits, etc.
The step S30 specifically includes:
and the upper computer sends an AT instruction carrying the working mode to the wireless communication module through the initialized UART port, and the wireless communication module adjusts the working mode from the instruction mode to the transparent transmission mode based on the received AT instruction and feeds back a response instruction for finishing the upgrade state setting to the upper computer. The AT instruction is an instruction applied to connection and communication between the terminal device and the PC application.
After the wireless communication module receives data through the UART port in the transparent transmission mode, the received data is not forwarded to the AT command module but is sent to an application layer inside the wireless communication module.
The step S40 specifically includes:
step S41, the upper computer sets a time interval and a time length threshold, and the upper computer detects whether a response instruction is received at intervals, if yes, the step S43 is entered; if not, go to step S42;
step S42, the upper computer detects whether the duration from the current time to the time of sending the AT command exceeds a duration threshold value, if yes, the abnormality of the wireless communication module is indicated, and the process is ended; if not, go to step S41;
for example, after the upgrade state of the wireless communication module is set, replying the character C to the upper computer, detecting whether the character C is received or not by the upper computer at intervals of 1 second, and if the character C is not received within 30 seconds, indicating that the wireless communication module is abnormal;
step S43, the upper computer acquires a check identifier from the wireless communication module through the initialized UART port based on the received response instruction; the value of the check identifier is CRC check or sum check; the checksum, or checksum (checksum), is used to check the sum of a set of data items at a destination, typically in hexadecimal form; in practice, a specific string may be used to represent the CRC checksum, e.g., 0x43 for the CRC and 0x15 for the checksum;
step S44, presetting a file size by the upper computer, dividing the upgrade file into a plurality of upgrade subfiles based on the file size, calculating the check code of each upgrade subfile based on the check identifier, and adding the calculated check code into the corresponding upgrade subfile;
step S45, the upper computer sequentially transmits the upgrade subfiles to the wireless communication module through the initialized UART port based on an asynchronous transmission protocol, and closes the UART port after the transmission is completed. The asynchronous transmission protocol is used for transmission, so that the requirement on clock signals in the transmitting process can be omitted in the bottom link communication such as UART, meanwhile, the software of the receiving and transmitting end is simple to realize, and different manufacturers can be adapted conveniently.
In the step S44, the file size is 1024 bytes, which can well balance the transmission rate and stability.
In the step S44, the dividing the upgrade file into a plurality of upgrade subfiles based on the file size specifically includes:
dividing the upgrade file into a plurality of upgrade sub-files with the size of the file, and filling preset characters until the size of the file is met when the size of the last upgrade sub-file does not meet the size of the file.
The step S45 specifically includes:
step S451, the upper computer transmits the first upgrade sub-file to the wireless communication module through the initialized UART port based on the asynchronous transmission protocol;
step S452, the wireless communication module receives the upgrade sub-file, checks the upgrade sub-file based on a check code carried by the upgrade sub-file, and if the upgrade sub-file passes the check, feeds back a check result to the upper computer, and enters step S453; if the verification fails, feeding back a verification failure result to the upper computer, and proceeding to step S451;
step S453, the upper computer sends the next upgrading sub-file to the wireless communication module and checks based on the received check passing result, and so on;
step S454, the upper computer judges whether all the upgrade sub-files are sent, if yes, a first instruction of completing the upgrade file sending is sent to the wireless communication module, and the step S455 is carried out; if not, go to step S453;
step S455, the wireless communication module determines whether to complete the reception of all the upgrade sub-files based on the received first instruction, if yes, sends a second instruction to the upper computer that the reception of the upgrade file is completed, and proceeds to step S456; if not, go to step S453;
and step 456, the upper computer closes the UART port based on the received second instruction. Because the wireless communication module does not need to communicate temporarily before the upgrade is successful, the UART port is closed, and messy and useless data sent in the upgrade and restarting process are avoided, and the steps of reading a new version number and the like are prevented from being influenced after the upgrade is successful.
The step S50 specifically includes:
step S51, after the wireless communication module receives the upgrade file, restarting operation is executed, the upper computer monitors the UART port of the wireless communication module, judges whether the UART port is online again within a preset time period, if so, indicates that the wireless communication module enters an upgrade mode, and then the step S52 is executed; if not, the wireless communication module is not in the upgrading mode, and the process is ended;
and step S52, the wireless communication module feeds back the upgrading progress to the upper computer in real time through the UART port, and the upper computer restarts the wireless communication module to finish upgrading after judging that the wireless communication module is upgraded based on the upgrading progress.
The step S52 further includes:
the upper computer indicates the upgrading progress through a display screen or an indicator lamp, so that a user can know the upgrading state conveniently.
In summary, the invention has the advantages that:
1. the upgrade file stored by the external storage device is automatically copied to the preset file path, whether the upgrade file is stored in the file path is periodically checked, and the upgrade operation is automatically executed when the upgrade file is stored, namely, after the UART port of the wireless communication module is initialized, the wireless communication module is set to be in an upgrade state, and the upgrade file is transmitted to the wireless communication module through the UART port to execute the upgrade operation, so that the wireless communication module can be upgraded under the condition without a network, the situation that the OTA upgrade cannot be carried out in the prior art is avoided, the wireless communication module is not required to be removed from the original device, and the flexibility and the convenience of the upgrade of the wireless communication module are greatly improved.
2. The upgrade file is divided into a plurality of equal-sized upgrade subfiles, the check codes are calculated based on the check mode supported by the wireless communication module, the upgrade subfiles are transmitted to the wireless communication module through an asynchronous transmission protocol and checked, when the check fails, the corresponding upgrade subfiles are retransmitted, and after the transmission of the upgrade subfiles is completed, the bidirectional check is carried out, so that the upper computer is ensured to be completely transmitted, the wireless communication module is completely received, the integrity and the correctness of the upgrade file received by the wireless communication module are ensured, the upgrade failure caused by the error of the upgrade file is avoided, and the upgrade stability of the wireless communication module is greatly improved.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the invention, and that equivalent modifications and variations of the invention in light of the spirit of the invention will be covered by the claims of the present invention.
Claims (4)
1. A UART-based wireless communication module upgrading method is characterized in that: the method comprises the following steps:
step S10, presetting a file path and a checking period by the upper computer, and automatically copying an upgrade file stored by the external storage device to the file path when the upper computer detects that the external storage device is accessed;
the upper computer automatically checks whether the file path stores the upgrade file or not every the check period, if yes, the step S20 is entered; if not, continuing to check;
step S20, after the upper computer clears the buffer data of the UART port, configuring the communication parameters of the UART port, and further completing the initialization of the UART port;
step S30, the upper computer sends an AT instruction carrying a working mode to the wireless communication module through the initialized UART port, the wireless communication module adjusts the working mode from an instruction mode to a transparent transmission mode based on the received AT instruction, and feeds back a response instruction of finishing the upgrade state setting to the upper computer;
step S40, the upper computer transmits the upgrade file to the wireless communication module through the initialized UART port based on an asynchronous transmission protocol;
step S50, the wireless communication module executes upgrading operation based on the received upgrading file;
the step S40 specifically includes:
step S41, the upper computer sets a time interval and a time length threshold, and the upper computer detects whether a response instruction is received at intervals, if yes, the step S43 is entered; if not, go to step S42;
step S42, the upper computer detects whether the duration from the current time to the time of sending the AT command exceeds a duration threshold value, if yes, the abnormality of the wireless communication module is indicated, and the process is ended; if not, go to step S41;
step S43, the upper computer acquires a check identifier from the wireless communication module through the initialized UART port based on the received response instruction; the value of the check identifier is CRC check or sum check;
step S44, presetting a file size by the upper computer, dividing the upgrade file into a plurality of upgrade subfiles based on the file size, calculating the check code of each upgrade subfile based on the check identifier, and adding the calculated check code into the corresponding upgrade subfile; the file size is 1024 bytes;
step S45, the upper computer sequentially transmits the upgrade subfiles to the wireless communication module through the initialized UART port based on an asynchronous transmission protocol, and closes the UART port after the transmission is completed;
the step S45 specifically includes:
step S451, the upper computer transmits the first upgrade sub-file to the wireless communication module through the initialized UART port based on the asynchronous transmission protocol;
step S452, the wireless communication module receives the upgrade sub-file, checks the upgrade sub-file based on a check code carried by the upgrade sub-file, and if the upgrade sub-file passes the check, feeds back a check result to the upper computer, and enters step S453; if the verification fails, feeding back a verification failure result to the upper computer, and proceeding to step S451;
step S453, the upper computer sends the next upgrading sub-file to the wireless communication module and checks based on the received check passing result, and so on;
step S454, the upper computer judges whether all the upgrade sub-files are sent, if yes, a first instruction of completing the upgrade file sending is sent to the wireless communication module, and the step S455 is carried out; if not, go to step S453;
step S455, the wireless communication module determines whether to complete the reception of all the upgrade sub-files based on the received first instruction, if yes, sends a second instruction to the upper computer that the reception of the upgrade file is completed, and proceeds to step S456; if not, go to step S453;
and step 456, the upper computer closes the UART port based on the received second instruction.
2. The UART-based wireless communication module upgrading method according to claim 1, wherein: in the step S44, the dividing the upgrade file into a plurality of upgrade subfiles based on the file size specifically includes:
dividing the upgrade file into a plurality of upgrade sub-files with the size of the file, and filling preset characters until the size of the file is met when the size of the last upgrade sub-file does not meet the size of the file.
3. The UART-based wireless communication module upgrading method according to claim 1, wherein: the step S50 specifically includes:
step S51, after the wireless communication module receives the upgrade file, restarting operation is executed, the upper computer monitors the UART port of the wireless communication module, judges whether the UART port is online again within a preset time period, if so, indicates that the wireless communication module enters an upgrade mode, and then the step S52 is executed; if not, the wireless communication module is not in the upgrading mode, and the process is ended;
and step S52, the wireless communication module feeds back the upgrading progress to the upper computer in real time through the UART port, and the upper computer restarts the wireless communication module to finish upgrading after judging that the wireless communication module is upgraded based on the upgrading progress.
4. The UART-based wireless communication module upgrading method of claim 3, wherein: the step S52 further includes:
the upper computer indicates the upgrading progress through a display screen or an indicator lamp.
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