CN113626057A - Camera remote firmware upgrading system and method based on GigE Vision interface - Google Patents
Camera remote firmware upgrading system and method based on GigE Vision interface Download PDFInfo
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- CN113626057A CN113626057A CN202111004133.2A CN202111004133A CN113626057A CN 113626057 A CN113626057 A CN 113626057A CN 202111004133 A CN202111004133 A CN 202111004133A CN 113626057 A CN113626057 A CN 113626057A
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Abstract
The invention provides a system and a method for upgrading camera remote firmware based on a GigE Vision interface, which comprises the following steps: providing a firmware upgrade package which is compressed based on Huffman coding and comprises at least two files: one is a configuration file, and the other is a file to be upgraded, and the configuration file and the file to be upgraded are stored in a directory of the server; the camera is connected with an upper computer PC, the camera enters a GVCP feedback command thread, and the upper computer initializes the camera and then sends a command data packet for firmware upgrading to the camera through a GVCP protocol; after the camera returns the confirmed ACK data packet to the upper computer, the upper computer acquires a firmware upgrading packet from the server and then sends the firmware upgrading packet to the camera; the camera receives the firmware upgrading packet sent by the upper computer; decompressing based on Huffman coding, and finally writing the firmware upgrade package into a specified directory.
Description
Technical Field
The invention relates to the field of firmware upgrading, in particular to a system and a method for remotely upgrading firmware of a camera based on a GigE Vision interface.
Background
The existing equipment firmware upgrading needs replacing files in a flash through a card reader, replacing the files in the flash through a cable connecting an upper computer and a development board or replacing the files in the flash through an FTP tool, the upgrading needs frequently plugging and unplugging an sd card through the card reader, the equipment needs to be powered off in the process, the upgrading needs to be completed and the equipment needs to be powered on again, and the upgrading is relatively complex; the camera subsequently cancels the use of the sd card, adopts a flash storage medium of QSPI + eMMC, and adopts onboard flash, so that the camera can be connected with an upper computer and a development board only through a large number of cables for upgrading, and is very inconvenient; upgrading by means of FTP tools requires the aid of tools of third parties and also the advance confirmation of the IP address of the camera. The efficiency of upgrading the firmware of the equipment is greatly reduced by the three modes, and good user experience cannot be provided for users. Therefore, it is necessary to provide a remote firmware upgrade system and method, which are integrated into the application software of the camera, and can ensure the normal operation of the camera software and the integrity of the upgraded firmware during the firmware transmission process.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a camera remote firmware upgrading system based on a GigE Vision interface. The firmware upgrading can be conveniently carried out on the camera, the complex process is avoided, and the time cost is saved. The invention also aims to provide a method for upgrading the remote firmware of the camera based on the GigE Vision interface.
The technical scheme is as follows: a camera remote firmware upgrading system based on a GigE Vision interface comprises a server, an upper computer, an Ethernet and a camera based on the GigE Vision interface, wherein the camera based on the GigE Vision interface is connected with the upper computer which is connected with the server; when the system is upgraded, the camera and the upper computer are connected to the same local area network, the camera is electrified and initialized, and the upper computer reads the camera configuration file, discovers equipment and generates a camera configuration interface; the server stores a file generated by compressing the provided firmware upgrade file through Huffman coding, and generates a firmware upgrade package at least comprising two files: one is a configuration file and one is a file to be upgraded; the upper computer obtains the firmware upgrading package and transmits the firmware upgrading package to the camera, the camera performs format packaging through analysis and pretreatment according to the obtained data package, finally, a complete firmware upgrading package is received after the interaction of the upper computer and the camera communication instruction is finished, the upper computer displays the transmission progress in real time, and the camera receives the firmware upgrading package and upgrades the firmware of the camera.
Preferably, the method for upgrading the firmware of the camera by the camera receiving the firmware upgrade package is as follows: and the camera receives the firmware upgrading packet, decompresses the firmware by Huffman coding, restarts the camera, backs up the firmware version before upgrading, moves the file to be upgraded to a specified directory in the root file system, verifies the integrity of the upgraded file by the configuration file, and restarts the camera again to finish the firmware upgrading.
Preferably, the ethernet is a gigabit ethernet.
Preferably, the upper computer acquires the firmware upgrade package and transmits the firmware upgrade package to the camera through the GVCP protocol.
Preferably, the manner of connecting the camera based on the GigE Vision interface with the upper computer is as follows: the camera based on the GigE Vision interface comprises a ZYNQ7000 chip, and the ZYNQ7000 chip is connected with the PHY chip; the PHY chip is connected with an upper computer.
The firmware upgrade uses gigabit network communication, which implements GigE Vision protocol for transmitting files and commands based on TCP/IP protocol stack through EMAC (Ethernet Access Controller).
Preferably, the remote firmware upgrading process of the camera by the upper computer PC comprises discovering equipment of the upper computer PC, generating a camera configuration interface by the upper computer, signaling interaction between the upper computer and the camera, storing a firmware upgrading packet in the camera and displaying real-time transmission progress of the upper computer PC.
The invention provides a method for upgrading a camera remote firmware based on a GigE Vision interface, which comprises the following steps:
1) connecting a camera and an upper computer PC into the same local area network, electrifying and initializing a system, and establishing connection between the camera and the upper computer;
2) after the camera is connected with the upper computer PC, the camera enters a GVCP control channel monitoring thread;
3) after initializing the camera, the PC sends a firmware upgrading command to the camera;
4) pre-storing a firmware upgrading packet generated after Huffman coding compression in a server;
5) the upper computer PC firstly sends a command data packet to the camera, and the camera returns an ACK data packet confirmed by the command to the upper computer PC;
6) the method comprises the steps that after an ACK data packet which is confirmed to be sent is received by an upper computer PC, a firmware upgrading packet is obtained from a server, the upper computer PC reads 536 bytes of the firmware upgrading packet each time to generate a file data packet, and the upper computer PC sends the file data packet to a camera;
7) the camera analyzes and preprocesses the received file data packet to package the format, when the byte of the last file data packet received by the camera is less than 536 bytes, the last file data packet sends an ACK data packet to the upper computer PC, and the file receiving is finished;
8) the camera receives the firmware upgrading packet sent by the PC;
9) and decompressing the firmware upgrading packet received by the camera through Huffman coding.
10) Restarting a camera, backing up a firmware version before firmware upgrading, and moving a file to be upgraded to a directory specified in a root file system;
11) verifying the integrity of the upgrade file through the configuration file;
12) and restarting the camera to finish firmware upgrading.
Preferably, the firmware upgrading signaling interaction process of the upper computer and the camera comprises the following steps:
1) firstly, the PC of the upper computer needs to send a command data packet to the camera to inform the camera that the camera needs to receive a firmware upgrading packet. The intra-packet structure of the command packet is filled with one structure write mem _ CMD _ MSG, that is:
in this structure, the cekeyvalue is a fixed value of 0x42, nCommand is used for the current function key of MV _ GEV _ WRITEMEM _ CMD, the camera application knows that it is to receive the firmware upgrade package when receiving this key, and the nReqId value is used to record the number of packages sent out. The nMemAddress member serves as an address for transmitting current data, and since the address is automatically incremented for transmitting consecutive data, the member can correspond to the accumulated size of the transmission file. The chWriteMemData array member carries the actual binary data of the firmware upgrade package file.
In the process of discovering the equipment by the PC, the PC stores the network address of the camera, so that the stored network address can be directly used when the PC sends a command data packet. The upper computer PC sends a command data packet to the camera, at the moment, the member nMemAddress in the command data packet is 0, the camera analyzes the member nMemAddress in the packet after receiving the command data packet, if the nMemAddress is 0, namely, the accumulated size of the transmission file is 0 at the moment, the camera judges that the upper computer PC sends a command data packet at the moment, the camera is ready to receive a firmware upgrading packet, and sends a confirmed ACK data packet to the upper computer PC. It should be noted here that, in the process of sending the first command packet to the camera and waiting for the ACK packet, the upper computer PC sets the retransmission number to 5 times, that is, if the camera does not respond to the corresponding ACK packet or the receiving function is overtime, the camera retries 5 times at most, and if the camera fails, the transmission attempt is aborted and restarted. The intra-packet structure of the camera-responded ACK packet is filled with the structure ACK _ MSG _ HEADER, i.e.
In this structure, nStatus indicates the status of the request operation, nAckMsgValue indicates the acknowledgment message value, nLength indicates the load data length after the structure, and nAckld indicates the response ID, i.e., the number of times the camera responds to the upper computer PC.
After receiving the ACK data packet, the PC analyzes the confirmation message value of the member nActMsgValue in the packet, and can directly take the value of the member through a pointer, and if the value of the member is MV _ GEV _ WRITEMEM _ ACK, the successful sending of the command data packet at this time is indicated.
2) After the command data packet is successfully sent, the upper computer PC starts to prepare for sending a file data packet to the camera, the intra-packet structure of the file data packet is consistent with the intra-packet structure of the command data packet in the step 1, and the intra-packet structure is filled with a structure write mem _ CMD _ MSG, and the structure content refers to the step 1. Before the upper computer PC sends a file data packet to the camera, the upper computer PC opens a firmware upgrade packet to be sent in a binary reading mode by using a C function fopen (), the upper computer PC reads the content in the firmware upgrade packet by using a C function fread (), the maximum of 536 bytes are read each time, the data are stored in a chWriteMemData array member in a structure WRITEMEM _ CMD _ MSG of a sending cache, the reading of an actual data value is recorded at the same time, and the value is accumulated in an nMeAddress member variable of the structure WRITEMEM _ CMD _ MSG to represent the number of bytes of data which are sent. It should be noted here that the number of retries of the file packet is 3, and if 3 retransmissions fail, the transmission process is terminated and the transmission is attempted to be restarted.
The upper computer PC sends a file data packet to the camera, and after the camera receives the file data packet sent by the upper computer PC, the camera analyzes and stores binary data carried by the chWriteMemData array members in the file data packet and sends an ACK data packet to the upper computer PC. The structure of the ACK packet refers to step 1. After receiving the ACK data packet, the PC analyzes the confirmation message value of the member nActMsgValue in the packet, and can directly take the value of the member through a pointer, and if the value of the member is MV _ GEV _ WRITEMEM _ ACK, the successful transmission of the file data packet at this time is indicated.
3) And (3) repeating the step (2), before the upper computer PC sends the file data packet to the camera, when the upper computer PC reads the last part of the file by using a fread () function, namely the read data is less than 536 bytes, at the moment, the actually read byte number is returned, the upper computer PC judges that the last file data packet is the last file data packet, and the next sending of the file data packet to the camera is stopped. The camera analyzes the member of the nMemAddress in the file data packet sent by the PC, subtracts the stored member of the nMemAddress of the previous file data packet to calculate the size of the transmission data of the current file data packet, judges that the size of the transmission data is less than 536 bytes, sends an ACK data packet to the PC and finishes file receiving. And ending the firmware upgrading signaling interaction flow.
Has the advantages that: compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:
(1) the invention is based on the ZYNQ7000 chip, and through designing each part of modules (including a configuration analysis module, a system management module and a communication module, each module is divided into a plurality of small modules) in the ZYNQ7000 chip driver, the development cost is effectively reduced, and the operation power consumption is reduced.
(2) The transmission firmware upgrade package is based on a GVCP protocol in a GigE Vision protocol, the GVCP protocol is used for a back-end management application program to send a command to control and configure the intelligent camera, and the application program sends the command through the GVCP protocol and needs to wait for the reply of the camera, so that the reliability of transmission is ensured. Reliable transmission of the firmware upgrade package is achieved.
(3) The maximum length of a data packet in the GVCP protocol is 576 bytes, and because the GVCP protocol is based on the UDP protocol, a data link layer, a network layer and a transport layer are the same as the UDP protocol and comprise 20 bytes of an IP header and 8 bytes of a UDP header, and in addition, the maximum length of the 8 bytes of the GVCP header and the maximum length of 540 bytes of the GVCP load is 576 bytes, the firmware upgrade packet is decompressed based on Huffman coding, and the limitation of transmission bytes of each data packet in the GVCP protocol is effectively relieved.
(4) Based on the embedded operating system, it is easier to add new modules in the application program, without changing the framework of the program, thus greatly reducing the development cost. By the method, a large number of cables are not needed to be used for connecting the upper computer and the development board, the upgrading cost is reduced, and the convenience and the flexibility of firmware upgrading are reflected.
(5) By adopting the root file system, the firmware upgrade package can be conveniently operated only by knowing simple information characteristics such as the file name, the file path and the like of the firmware upgrade package, and the operation process of the firmware upgrade package in a specific physical storage space is not required to be known.
(6) The upgraded firmware comprises BOOT.bin, uImage, umamdisk.image.gz, devicetree.dtb, vsync _ cmd, 3DCam.xml and other files, the configuration files comprise the upgrade type, the upgrade file name, the md5 value and the version number of the upgrade file, and different upgraded firmware is verified through the configuration files, so that the reliability of firmware upgrading is improved.
Drawings
FIG. 1 is a diagram of a camera application software framework according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a firmware upgrade communication flow provided by an embodiment of the present invention;
fig. 3 is a schematic diagram of a write mem command frame structure required for resolving a firmware upgrade command according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an overall firmware upgrade scheme according to an embodiment of the present invention.
Detailed Description
The present invention is described in further detail below with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.
The invention provides a camera remote firmware upgrading system based on a GigE Vision interface, which comprises: the system comprises a server, an upper computer, a gigabit Ethernet and a camera based on a GigE Vision interface, wherein the camera based on the GigE Vision interface is core equipment of the system and comprises a ZYNQ7000 chip; wherein the ZYNQ7000 chip is connected with the PHY chip; the PHY chip is connected with an upper computer; the upper computer is connected with the server; the firmware upgrade mainly uses gigabit network communication, which implements GigE Vision protocol for transmitting files and commands based on TCP/IP protocol stack through EMAC (Ethernet Access Controller).
The remote firmware upgrading process of the camera by the upper computer PC comprises the steps of finding equipment by the upper computer PC, generating a camera configuration interface by the upper computer PC, interacting the upper computer with a camera signaling, storing a firmware upgrading packet in the camera and displaying the real-time transmission progress of the upper computer PC. The working process of the system is as follows:
1) the camera and the upper computer PC are connected into the same local area network, the camera is electrified and initialized, the upper computer PC reads the camera configuration file, finds the equipment and generates a camera configuration interface, and the camera starts to work;
2) compressing the provided firmware upgrading file through Huffman coding to generate a firmware upgrading package at least comprising two files: one is a configuration file and the other is a file to be upgraded, and the firmware upgrade package is stored in a fixed directory of the server;
3) the method comprises the steps that an upper computer PC obtains a firmware upgrading packet and transmits the firmware upgrading packet to a camera through a GVCP protocol, the camera conducts format encapsulation through analysis and preprocessing according to the obtained data packet, and finally a complete firmware upgrading packet is received after interaction of the upper computer PC and a camera communication instruction is finished. In the process, the PC displays the transmission progress in real time.
4) And decompressing the firmware upgrading packet received by the camera through Huffman coding. Restarting a camera, backing up a previous firmware version, and moving a file to be upgraded to a directory specified in a root file system; verifying the integrity of the upgrade file through the configuration file; and restarting the camera to finish firmware upgrading.
A chip in the camera firmware upgrading system selects ZYNQ7000, ZYNQ series chips integrate an ARM processor and an FPGA logic unit into a single chip, the flexibly designed heterogeneous multi-core processor scheme firstly solves the problem of communication between two cores with different structures to show the superiority of the processor, and Xilinx uses an AMBA protocol to realize high-bandwidth and low-delay connection between the two cores. The AMBA protocol is an on-chip interconnection specification and is mainly used for connection and management of functional modules in the SoC.
The upper computer PC in the camera firmware upgrading system adopts upper computer software developed by a project group based on an MFC.
Referring to fig. 1, an implementation scheme of a camera remote firmware upgrade system based on a GigE Vision interface includes the following general operation flows:
1) connecting a camera and an upper computer PC into the same local area network, electrifying and initializing a system, and establishing connection between the camera and the upper computer;
2) after the camera is connected with the upper computer PC, the camera enters a GVCP control channel monitoring thread;
3) after initializing the camera, the PC sends a firmware upgrading command to the camera;
4) pre-storing a firmware upgrading packet generated after Huffman coding compression in a server;
5) the upper computer PC firstly sends a command data packet to the camera, and the camera returns an ACK data packet confirmed by the command to the upper computer PC;
6) the method comprises the steps that after an ACK data packet which is confirmed to be sent is received by an upper computer PC, a firmware upgrading packet is obtained from a server, the upper computer PC reads 536 bytes of the firmware upgrading packet each time to generate a file data packet, and the upper computer PC sends the file data packet to a camera;
7) the camera analyzes and preprocesses the received file data packet to package the format, when the byte of the last file data packet received by the camera is less than 536 bytes, the last file data packet sends an ACK data packet to the upper computer PC, and the file receiving is finished;
8) the camera receives the firmware upgrading packet sent by the PC;
9) and decompressing the firmware upgrading packet received by the camera through Huffman coding.
10) Restarting a camera, backing up a previous firmware version, and moving a file to be upgraded to a directory specified in a root file system;
11) verifying the integrity of the upgrade file through the configuration file;
12) and restarting the camera to finish firmware upgrading.
Referring to fig. 2, a signaling interaction flow between the upper computer PC and the camera:
(1) the camera is electrified to start an operating system, application software is run, and a GVCP object is newly built and initialized;
(2) starting a GVCP control channel monitoring thread;
(3) opening a control channel;
(4) the upper computer PC sends control command information to the camera through a GVCP protocol;
(5) the camera receives and parses the command information.
The format of the camera parse command frame refers to fig. 3.
The functional module required by the firmware upgrading system is a communication module, which is further subdivided into many small modules, including a network configuration and parameter file management module and a data transmission module under the system management module, refer to fig. 4.
Claims (7)
1. A camera remote firmware upgrading system based on a GigE Vision interface is characterized by comprising a server, an upper computer, an Ethernet and a camera based on the GigE Vision interface, wherein the camera based on the GigE Vision interface is connected with the upper computer which is connected with the server; when the system is upgraded, the camera and the upper computer are connected to the same local area network, the camera is electrified and initialized, and the upper computer reads the camera configuration file, discovers equipment and generates a camera configuration interface; the server stores a file generated by compressing the provided firmware upgrade file through Huffman coding, and generates a firmware upgrade package at least comprising two files: one is a configuration file and one is a file to be upgraded; the upper computer obtains the firmware upgrading package and transmits the firmware upgrading package to the camera, the camera performs format packaging through analysis and pretreatment according to the obtained data package, finally, a complete firmware upgrading package is received after the interaction of the upper computer and the camera communication instruction is finished, the upper computer displays the transmission progress in real time, and the camera receives the firmware upgrading package and upgrades the firmware of the camera.
2. The system for remotely upgrading firmware of a camera based on a GigE Vision interface of claim 1, wherein the method for upgrading the firmware of the camera by the camera receiving the firmware upgrade package is as follows: and the camera receives the firmware upgrading packet, decompresses the firmware by Huffman coding, restarts the camera, backs up the firmware version before upgrading, moves the file to be upgraded to a specified directory in the root file system, verifies the integrity of the upgraded file by the configuration file, and restarts the camera again to finish the firmware upgrading.
3. The system of claim 1, wherein the ethernet is gigabit ethernet.
4. The system of claim 1, wherein the firmware upgrade package acquired by the upper computer is transmitted to the camera via the GVCP protocol.
5. The system for remotely upgrading firmware of a camera based on a GigE Vision interface of claim 1, wherein the connection mode of the camera based on the GigE Vision interface and an upper computer is as follows: the camera based on the GigE Vision interface comprises a ZYNQ7000 chip, and the ZYNQ7000 chip is connected with the PHY chip; the PHY chip is connected with an upper computer.
6. A method for upgrading a camera remote firmware upgrade system based on a GigE Vision interface as claimed in any one of claims 1 to 5, comprising the steps of:
1) connecting a camera and an upper computer PC into the same local area network, electrifying and initializing a system, and establishing connection between the camera and the upper computer;
2) after the camera is connected with the upper computer PC, the camera enters a GVCP control channel monitoring thread;
3) after initializing the camera, the PC sends a firmware upgrading command to the camera;
4) pre-storing a firmware upgrading packet generated after Huffman coding compression in a server;
5) the upper computer PC firstly sends a command data packet to the camera, and the camera returns an ACK data packet confirmed by the command to the upper computer PC;
6) the method comprises the steps that after an ACK data packet which is confirmed to be sent is received by an upper computer PC, a firmware upgrading packet is obtained from a server, the upper computer PC reads 536 bytes of the firmware upgrading packet each time to generate a file data packet, and the upper computer PC sends the file data packet to a camera;
7) the camera analyzes and preprocesses the received file data packet to package the format, when the byte of the last file data packet received by the camera is less than 536 bytes, the last file data packet sends an ACK data packet to the upper computer PC, and the file receiving is finished;
8) the camera receives the firmware upgrading packet sent by the PC;
9) the firmware upgrading packet received by the Huffman coding decompression camera;
10) restarting a camera, backing up a firmware version before firmware upgrading, and moving a file to be upgraded to a directory specified in a root file system;
11) verifying the integrity of the upgrade file through the configuration file;
12) and restarting the camera to finish firmware upgrading.
7. The method according to claim 6, wherein the method for interacting the firmware upgrade signaling between the upper computer and the camera comprises the following steps:
(1) the upper computer sends a command data packet to the camera to inform the camera that a firmware upgrading packet needs to be received, and the camera sends a command for confirming the preparation of data receiving to the upper computer after receiving the command data packet;
(2) after receiving a command for confirming that data are ready to be received, the upper computer starts to prepare to send a file data packet to the camera, before the upper computer sends the file data packet to the camera, the upper computer opens a firmware upgrading packet to be sent in a binary reading mode by using C function fopen (), the upper computer reads the content in the firmware upgrading packet by using C function fread (), at most 536 bytes are read each time, the read data are sent to the camera, the actual size of the data sent this time is sent to the camera together, and if the sent data are smaller than 536 bytes, the data sending is finished after the data sending is finished;
(3) after receiving a file data packet sent by an upper computer, the camera analyzes the data of the data packet, if the data received this time is actually less than 536 bytes, the camera feeds back the data packet which is successfully sent to the upper computer, and the data reception is finished; otherwise, feeding back a data packet which is successfully sent to the upper computer, and repeating the steps (2) - (3).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114640584A (en) * | 2022-02-14 | 2022-06-17 | 西安广和通无线软件有限公司 | Module upgrading method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114640584A (en) * | 2022-02-14 | 2022-06-17 | 西安广和通无线软件有限公司 | Module upgrading method and system |
| WO2023151372A1 (en) * | 2022-02-14 | 2023-08-17 | 西安广和通无线软件有限公司 | Module upgrade method and system |
| CN114640584B (en) * | 2022-02-14 | 2023-11-24 | 西安广和通无线软件有限公司 | Module upgrading method and system |
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