CN104007996A - Reliable firmware upgrading realizing method for distributed control system - Google Patents
Reliable firmware upgrading realizing method for distributed control system Download PDFInfo
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Abstract
The invention provides a reliable firmware upgrading realizing method applied to a distributed control system. The reliable firmware upgrading realizing method enables any controller nodes or a host in the system to have program upgrading capacity, greatly improves the expansion capacity of hardware equipment and the customizing performance of the system and reduces later maintenance and upgrading cost. The reliable firmware upgrading realizing method is different from a traditional method in that receiving of a target program package is realized in an application program, the received data package is stored into a backup program area at first, after the target program package is completely received and CRC verification is passed, parameter information marks are generated in an IAP mark area, and a Boot loader is called for to realize program upgrading. Even if an unpredictable failure occurs in any link, existing programs cannot be replaced, and therefore the stability of the system is greatly improved.
Description
Technical field
The present invention relates to a kind of program firmware upgrade new method that is applied to dcs field.
Background technology
Along with the development of electronic industry, node unit in dcs is more and more various, logic function is also done more complicated and more complicated, once find that the system of moving occurs that Bug maybe needs to change the situation of agreement newly added equipment, if there is no reliablely and stablely more new tool of on-the-spot program firmware of one, will face the vicious cycle of system dismounting---depot repair---system heavy dressing work.Although present a lot of distributed systems all provide program firmware updating function, but due to machine-processed problem, this method often can only complete the upgrading to main frame, cannot be general in dissimilar node, once and some system meets accident and upgrades unsuccessfully midway, to cause the thorough inefficacy of system, the maintenance cost greatly having increased, can not embody the advantage of development in science and technology.As shown in Figure 1, the dcs of a standard often comprise one can with the system host of PC communication, one or more bus, several controls of carry or detection node in bus.Whole distributed system also needs the transmission of formulating a host computer-node, host computer-main frame to reply transparent transmission mechanism, to realize upper function, any one node in distributed system is realized to program upgrade.
Summary of the invention
Goal of the invention: for above-mentioned prior art, provide a kind of reliable firmware upgrade implementation method of dcs, realize the reliable upgrading of each node in dcs and main frame.
Technical scheme: a kind of reliable firmware upgrade implementation method of dcs, the FLASH branch of main frame and each node includes Bootloader district, working procedure district, stand-by program district, upgrading label area and data parameters district; Firmware upgrade implementation method comprises the steps:
Step 1), host computer is 2 by upgrade file by size
nbyte is divided into some AKU, and each AKU also comprises upgrade file version number, upgrade file overall budget number, the total CRC check of upgrade file and current AKU sequence number; The integer that wherein n is 1～8;
Step 2), each AKU that when upgrading, the local firmware program reception host computer of main frame or each node sends also deposits stand-by program district separately in, generate upgrading task flagging receiving after all AKU in upgrading label area, described upgrading task flagging comprises the byte number of upgrade file version number, upgrade file overall budget number, the total CRC check of upgrade file and the every bag of upgrade file;
Step 3), by main frame or each node reset being carried out to the Bootloader of starting outfit, described Bootloader reads after the upgrading task flagging of its upgrading label area, judge whether described stand-by program district exists upgrade file: if exist upgrade file to jump to step 4), if do not exist upgrade file to jump to step 8);
Step 4), judge that by CRC check whether upgrade file is effective: if upgrade file effectively jumps to step 5); If the invalid step 8 that jumps to of upgrade file);
Step 5), jump to step 6 after wiping the file in described main frame or each node operator district), wipe and extremely jump to step 3 if occur);
Step 6), jump to step 7 after the AKU in described stand-by program district is write to described local runtime program area), write and extremely jump to step 3 if occur);
Step 7), jump to step 8 after wiping the upgrading task flagging of the label area of upgrading in described main frame or each node), wipe and extremely jump to step 3 if occur);
Step 8), whether effectively detect described working procedure district target program: if effectively jump to step 9), after time delay, jump to step 3 if invalid);
Step 9), described main frame or each node configuration operation program environment complete upgrading.
Further, the local firmware program of main frame or each node adopts breakpoint transmission agreement to receive each AKU and deposit described stand-by program district in.
As preferred version of the present invention, described step 2) comprise following concrete steps:
Step 2.1), application program receives after any one AKU, carries out the judgement of AKU version number: if the upgrade file version number receiving jump to steps 2.2 different from current working procedure version), do not upgrade if version number is identical;
Step 2.2), determine whether breakpoint transmission bag: the AKU receiving if current and the AKU version number receiving in historical upgrading task, upgrade file overall budget number, the total CRC check of upgrade file are identical, and this AKU receiving is breakpoint transmission bag and jumps to step 2.3); If different be new upgrading task, upgrade file version number, upgrade file overall budget number, the total CRC check information of upgrade file in new historical upgrading task more, and the upgrade file first that starts to ask for new liter level task wraps;
Step 2.3), ask for the AKU of expectation to host computer by the upgrading task of record; If receive, the AKU of expectation jumps to step 2.4), if the AKU of receiving is not to expect that AKU continues to expect AKU to host computer request;
Step 2.4), the AKU receiving is write in FLASH stand-by program district by AKU sequence number; Wherein when often writing after an AKU, read this AKU in from stand-by program district, write whether success to judge: if unsuccessful again to this AKU of host computer request; If successful jump to step 2.5);
Step 2.5), carry out AKU and receive judgement: send the information of having upgraded and jump to described step 3 to host computer if receive), the inwhole complete receptions of AKU continue to expect AKU to host requests.
As preferred version of the present invention, described step 8) in, delay time is 100～500ms.
Beneficial effect: the inventive method is different from classic method to be: in all scalable nodes, the Bootloader of prepackage is only in order to realize program verification and replacement function, Bootloader is positioned at the enabling address of Flash, after system reset, first carry out Bootloader, start to read upgrading label, judge whether to exist in stand-by program district and can pass through the complete upgrade file of program verification, if have and progressively the data of backup area write to operational area, and finally replace the first bag, prevent unexpected generation, then read operational area the first bag and judge whether legal start-up code, if the arbitrary process of replacing meets accident, Bootloader still can be from new execution upgrading, can not occur in the incomplete situation of replacement in program replacement process.Just can wipe upgrading label if upgrade file has been replaced, prepare to start the application program of operational area.
This distributed node firmware upgrade method has not had to receive based on the routine package of communications protocol, routine package is received in application program and realizes, and first deposit the packet of reception in stand-by program district, after reception program bag is complete and CRC check passes through, generate parameter information mark in upgrading label area, and call Bootloader to realize program upgrade, escalation process can be realized breakpoint transmission, even and if send out failure unpredictable in any link, old program can not be replaced, under extreme case, can continue program updates task, Flash reads and writes the delay protection that has 100～500ms when abnormal, can prevent that Flash from being write at short notice bad, improve greatly the stability of system.
Brief description of the drawings
Fig. 1 is the applied distributed system framework of the present invention;
Fig. 2 is that IAP of the present invention divides Division;
Fig. 3 is Bootloader treatment scheme;
Fig. 4 is that application program needs embedded reception processing data packets;
Fig. 5 is AKU and FLASH corresponding relation;
Fig. 6 is the definition of upgrading control field.
Embodiment
Below in conjunction with accompanying drawing, the present invention is done further and explained.
A reliable firmware upgrade implementation method for dcs, as shown in Figure 2, the FLASH branch of main frame and each node includes Bootloader district, working procedure district, stand-by program district, upgrading label area and data parameters district; And Bootloader district and working procedure district are only divided in the FLASH space of common IAP upgrading.
As shown in Figure 3, firmware upgrade implementation method comprises the steps:
Step 1), host computer is 2 by upgrade file by size
nbyte is divided into some AKU, and each AKU also comprises upgrade file version number, upgrade file overall budget number, the total CRC check of upgrade file and current AKU sequence number; The integer that wherein n is 1～8;
Step 2), each AKU that when upgrading, the local firmware program employing breakpoint transmission agreement reception host computer of main frame or each node sends also deposits stand-by program district separately in, as shown in Figure 4, specifically comprises the steps:
Step 2.1), application program receives after any one AKU, carries out the judgement of AKU version number: if the upgrade file version number receiving jump to steps 2.2 different from current working procedure version), do not upgrade if version number is identical;
Step 2.2), determine whether breakpoint transmission bag: the AKU receiving if current and the AKU version number receiving in historical upgrading task, upgrade file overall budget number, the total CRC check of upgrade file are identical, and this AKU receiving is breakpoint transmission bag and jumps to step 2.3); If different be new upgrading task, upgrade file version number, upgrade file overall budget number, the total CRC check information of upgrade file in new historical upgrading task more, and the upgrade file first that starts to ask for new liter level task wraps;
Step 2.3), ask for the AKU of expectation to host computer by the upgrading task of record; If receive, the AKU of expectation jumps to step 2.4), if the AKU of receiving is not to expect that AKU continues to expect AKU to host computer request;
Step 2.4), the AKU receiving is write in FLASH stand-by program district by AKU sequence number; Wherein when often writing after an AKU, read this AKU in from stand-by program district, write whether success to judge: if unsuccessful again to this AKU of host computer request; If successful jump to step 2.5);
Step 2.5), carry out AKU and receive judgement: send the information of having upgraded and jump to described step 3 to host computer if receive), the inwhole complete receptions of AKU continue to expect AKU to host requests.
For example every sector writes 16 AKU, as shown in Figure 5, generate upgrading task flagging receiving after all AKU in upgrading label area, described upgrading task flagging comprises the byte number of upgrade file version number, upgrade file overall budget number, the total CRC check of upgrade file and the every bag of upgrade file;
Step 3), by main frame or each node reset being carried out to the Bootloader of starting outfit, described Bootloader reads after the upgrading task flagging of its upgrading label area, judge whether described stand-by program district exists upgrade file: if exist upgrade file to jump to step 4), if do not exist upgrade file to jump to step 8);
Step 4), judge that by CRC check whether upgrade file is effective: if upgrade file effectively jumps to step 5); If the invalid step 8 that jumps to of upgrade file);
Step 5), jump to step 6 after wiping the file in described main frame or each node operator district), wipe and extremely jump to step 3 if occur);
Step 6), jump to step 7 after the AKU in described stand-by program district is write to described local runtime program area), write and extremely jump to step 3 if occur);
Step 7), jump to step 8 after wiping the upgrading task flagging of the label area of upgrading in described main frame or each node), wipe and extremely jump to step 3 if occur);
Step 8), whether effectively detect described working procedure district target program: if effectively jump to step 9), after time delay, jump to step 3 if invalid), delay time can be set as 100～500ms;
Step 9), described main frame or each node configuration operation program environment complete upgrading.
Be illustrated in figure 6 the frame format definition of the descending AKU of this updating protocol and up upgrade request bag.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. a reliable firmware upgrade implementation method for dcs, is characterized in that: the FLASH branch of main frame and each node includes Bootloader district, working procedure district, stand-by program district, upgrading label area and data parameters district; Firmware upgrade implementation method comprises the steps:
Step 1), host computer is 2 by upgrade file by size
nbyte is divided into some AKU, and each AKU also comprises upgrade file version number, upgrade file overall budget number, the total CRC check of upgrade file and current AKU sequence number; The integer that wherein n is 1～8;
Step 2), each AKU that when upgrading, the local firmware program reception host computer of main frame or each node sends also deposits stand-by program district separately in, generate upgrading task flagging receiving after all AKU in upgrading label area, described upgrading task flagging comprises the byte number of upgrade file version number, upgrade file overall budget number, the total CRC check of upgrade file and the every bag of upgrade file;
Step 3), by main frame or each node reset being carried out to the Bootloader of starting outfit, described Bootloader reads after the upgrading task flagging of its upgrading label area, judge whether described stand-by program district exists upgrade file: if exist upgrade file to jump to step 4), if do not exist upgrade file to jump to step 8);
Step 4), judge that by CRC check whether upgrade file is effective: if upgrade file effectively jumps to step 5); If the invalid step 8 that jumps to of upgrade file);
Step 5), jump to step 6 after wiping the file in described main frame or each node operator district), wipe and extremely jump to step 3 if occur);
Step 6), jump to step 7 after the AKU in described stand-by program district is write to described local runtime program area), write and extremely jump to step 3 if occur);
Step 7), jump to step 8 after wiping the upgrading task flagging of the label area of upgrading in described main frame or each node), wipe and extremely jump to step 3 if occur);
Step 8), whether effectively detect described working procedure district target program: if effectively jump to step 9), after time delay, jump to step 3 if invalid);
Step 9), described main frame or each node configuration operation program environment complete upgrading.
2. the reliable firmware upgrade implementation method of a kind of dcs according to claim 1, it is characterized in that: described step 2) in, the local firmware program of main frame or each node adopts breakpoint transmission agreement to receive each AKU and deposit described stand-by program district in.
3. the reliable firmware upgrade implementation method of a kind of dcs according to claim 2, is characterized in that: described step 2) comprise following concrete steps:
Step 2.1), application program receives after any one AKU, carries out the judgement of AKU version number: if the upgrade file version number receiving jump to steps 2.2 different from current working procedure version), do not upgrade if version number is identical;
Step 2.2), determine whether breakpoint transmission bag: the AKU receiving if current and the AKU version number receiving in historical upgrading task, upgrade file overall budget number, the total CRC check of upgrade file are identical, and this AKU receiving is breakpoint transmission bag and jumps to step 2.3); If different be new upgrading task, upgrade file version number, upgrade file overall budget number, the total CRC check information of upgrade file in new historical upgrading task more, and the upgrade file first that starts to ask for new liter level task wraps;
Step 2.3), ask for the AKU of expectation to host computer by the upgrading task of record; If receive, the AKU of expectation jumps to step 2.4), if the AKU of receiving is not to expect that AKU continues to expect AKU to host computer request;
Step 2.4), the AKU receiving is write in FLASH stand-by program district by AKU sequence number; Wherein when often writing after an AKU, read this AKU in from stand-by program district, write whether success to judge: if unsuccessful again to this AKU of host computer request; If successful jump to step 2.5);
Step 2.5), carry out AKU and receive judgement: send the information of having upgraded and jump to described step 3 to host computer if receive), the inwhole complete receptions of AKU continue to expect AKU to host requests.
4. the reliable firmware upgrade implementation method of a kind of dcs according to claim 1, is characterized in that: described step 8) in, delay time is 100～500ms.
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