CN102087608B - Compression method and decompression method of embedded programs and embedded system - Google Patents
Compression method and decompression method of embedded programs and embedded system Download PDFInfo
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- CN102087608B CN102087608B CN200910188727.6A CN200910188727A CN102087608B CN 102087608 B CN102087608 B CN 102087608B CN 200910188727 A CN200910188727 A CN 200910188727A CN 102087608 B CN102087608 B CN 102087608B
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 230000006837 decompression Effects 0.000 title claims abstract description 24
- 230000006835 compression Effects 0.000 title claims abstract description 22
- 238000007906 compression Methods 0.000 title claims abstract description 17
- 230000000977 initiatory effect Effects 0.000 claims description 8
- 230000001360 synchronised effect Effects 0.000 claims description 8
- 238000007726 management method Methods 0.000 abstract description 7
- 238000013500 data storage Methods 0.000 abstract description 4
- 230000014759 maintenance of location Effects 0.000 abstract 1
- 102100021568 B-cell scaffold protein with ankyrin repeats Human genes 0.000 description 16
- 101000971155 Homo sapiens B-cell scaffold protein with ankyrin repeats Proteins 0.000 description 16
- 230000006870 function Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000007334 memory performance Effects 0.000 description 1
Abstract
The invention discloses a compression method and a decompression method of embedded programs and an embedded system. The compression method comprises the following steps of: compiling program codes by a micro-control unit; intensively putting kernel program code data in relation to chip initialization and power supply management parts into a BANK0 code set area of a code set area; loading some other function codes into BANK1-BANK31 areas of the code set area; connecting a program storage; compressing the codes in the BANK1-BANK31 areas in the compiling and connecting processes; and outputting executable programs to the program storage. Through the compression method, the decompression method and the embedded system, the capacities of conventional program storages and data storages are fully used to adapt to more and more program storing.
Description
Technical field
The present invention relates to embedded program treatment technology, particularly relate to a kind of embedded program compression method, decompression method and embedded system.
Background technology
51 series monolithics are a kind of band 4K byte flicker programmable and erasable ROM (read-only memory) (FPEROM) FalshProgrammable and Erasable Read Only Memory) low-voltage, high-performance CMOS 8-bit microprocessor, is commonly called as single-chip microcomputer.
Storer is parts very important and indispensable in single-chip microcomputer, and the work of single-chip microcomputer be unable to do without program, and program is deposited in program memory just.Equally, the process to data is can't do without in the operation of program, and various constant, variable, intermediate data, running status, operation result, all leave in data-carrier store.
Although program storage and data-carrier store are both storer, because purposes is different, thus they are not identical for the requirement of memory performance yet.Program storage, for depositing program, form and fixing constant, only therefrom extracts instruction or constant during single-chip microcomputer work, usually can not modify to its content, therefore to its basic demand be.Must guarantee that storing content remains unchanged for a long period of time, power-off is not also lost, so that program storage is non-volatile ROM (read-only memory) (Non-Volatile Read OnlyMesmory, NVROM); And data-carrier store is used to storage constant, variable, intermediate data, running status, operation result etc., that is, the content that data-carrier store is deposited will often change in program is run, namely to the requirement of data-carrier store be want can read and write quickly and easily at any time, so that data-carrier store is random access memory (Random--AccessMemory, RAM).
Program storage conventional in single-chip microcomputer has mask-type ROM MROM, disposable programmable memory OTPROM, ultraviolet light erasable programmable read only memory EPROM and flash memory Flash Memory etc. four kinds.
Due to the restriction of 51 series monolithic 16 bit address registers, the addressing range of external program memory and external data memory is all 64KB.Grouping connecting positioner BL51 allows generating code length to be greater than 8051 target programs of 64KB, it can manage a public domain (COMMONAREA) and maximum 32 code-group regions (BANKAREA), each code-group is 64KB to the maximum, thus this just determine that executable code is maximum can not more than 2MB (32*64KB).
Along with the application and development in 8051 series constantly increases, and application scale is large than ever, the past up a few MB of executable code.For the single-chip microcomputer of 8, because it holds quantitative limitation, when the relatively large program of exploitation, because program storage and data storage capacity are all smaller, and application function must not be reduced.
Therefore, along with increasing stored program demand, how to make full use of existing program storage and data storage capacity, make product have more the market competitiveness, become problem anxious to be resolved.
Summary of the invention
The object of the invention is to provide a kind of embedded program compression method, decompression method and embedded system, makes full use of existing program storage and data storage capacity, stores to adapt to increasing program.
For solving technical matters of the present invention, the present invention discloses a kind of compression method of embedded program code, wherein, comprising:
Micro-control unit compiles program code, kernel program code data centralization about chip initiation and power management section is put into the BANK0 code-group district in code-group region, some other function code is loaded BANK1 ~ BANK31 region in code-group region;
Linker storer;
In compiling and connection procedure, the code in BANK1 ~ BANK31 region is compressed;
Export executable program to described program storage.
More preferably, described compiling adopts the algorithm of Run-Length Coding (RLE, Run Length Encoding).
For solving technical matters of the present invention, the present invention also discloses a kind of decompression method of embedded program code, wherein, comprising:
Micro-control unit loads BANKO executive routine from program storage;
System initial value;
Described micro-control unit loads BANK (1-31) from described program storage and decompresses;
In embedding normal program operation process, the packed data that described micro-control unit reads in BANK1 ~ BANK31 from described program storage unzips to the operational area connecting Double Data Rate synchronous DRAM;
Described micro-control unit carries out major cycle.
More preferably, after described micro-control unit carries out major cycle, described method also comprises:
Described micro-control unit also reads in BANK1 ~ BANK31 packed data from described program storage successively and decompresses successively in free segment.
For solving technical matters of the present invention, the present invention also discloses a kind of embedded system, wherein, comprising: micro-control unit and program storage, and wherein, described micro-control unit connects described program storage; Wherein
Described micro-control unit, for compiling program code, kernel program code data centralization about chip initiation and power management section is put into the BANK0 code-group district in code-group region, some other function code is loaded BANK1 ~ BANK31 region in code-group region; In compiling and connection procedure, the code in BANK1 ~ BANK31 region is compressed, export executable program to described program storage;
Described program storage, for receiving and store the code data after the compiling of described micro-control unit and compression.
More preferably, also comprise: the Double Data Rate synchronous DRAM be connected with described micro-control unit, wherein,
Described Double Data Rate synchronous DRAM, for receiving the code data after the decompression of described micro-control unit, and runs.
Compared with prior art, the present invention has following beneficial effect:
Embedded program compression method disclosed by the invention, decompression method and embedded system, use compression and decompression technology, make identical program storage load more run time version, realize more function.
Accompanying drawing explanation
Fig. 1 is the executive routine code structure schematic diagram of the embodiment of the present invention;
Fig. 2 is a kind of Embedded System Structure schematic diagram of the embodiment of the present invention;
Fig. 3 is the compression method schematic flow sheet of a kind of embedded program code of the embodiment of the present invention;
Fig. 4 is the schematic flow sheet of the decompression method of a kind of embedded program code of the embodiment of the present invention;
Fig. 5 is the schematic flow sheet of the decompression method of a kind of embedded program code of another embodiment of the present invention.
Embodiment
The present invention discloses a kind of embedded program compression method, decompression method and embedded system, uses compression and decompression technology, makes identical program storage load more run time version, realize more function.
In one embodiment of the present of invention, adopt Run-Length Coding (RLE, Run Length Encoding) algorithm, also known as run length encoding, RLE is a very simple algorithm for Lossless Compression, and it simply describes with the number of times of repetition byte and repetition the byte replacing repetition.
The compression method in code-group region (BANK AREA) can be as follows.
According to 51 serial public domains (COMMON AREA) and maximum 32 code-group regions (BANK AREA), each code-group is this cardinal principle of 64KB to the maximum, and its executive routine code structure can be as shown in Figure 1.
As shown in Figure 2, for a kind of Embedded System Structure schematic diagram of the embodiment of the present invention, this system can comprise: micro-control unit (MCU, Micro Control Unit) 21, Double Data Rate synchronous DRAM (DDR, Double DataRate SDRAM) 22 and program storage 23.Wherein, MCU is also known as one chip microcomputer (Single ChipMicrocomputer) or single-chip microcomputer.Wherein, micro-control unit 21 connects described DDR22 and program storage 23 respectively.
Embed run time version can be write MCU storer DDR22 by MCU21 operational area from program storage 23.
Described micro-control unit 21, for compiling program code, kernel program code data centralization about chip initiation and power management section is put into the BANK0 code-group district in code-group region, some other function code is loaded BANK1 ~ BANK31 region in code-group region; In compiling and connection procedure, the code in BANK1 ~ BANK31 region is compressed, export executable program to described program storage 23;
Described program storage 23, compiles and code data after compressing for receiving and store described micro-control unit 21.
Described Double Data Rate synchronous DRAM 22, for receiving the code data after the decompression of described micro-control unit 21, and runs.
Embedding MCU21 is cannot carry out maim body to compress for embedded executable program.But smaller about the kernel program code such as chip initiation and power management section amount in embedded program, general tens KB, add a few KB size of code that decompresses, enough for 64KB space, a code-group region.Therefore, this part can be put into BANK0 code-group district about the kernel program code such as chip initiation and power management section data centralization, guarantee that embedded system is normally run, some other function code is loaded BANK1 ~ BANK31 region.
As shown in Figure 3, be the compression method schematic flow sheet of a kind of embedded program code of one embodiment of the invention, in compiling connection procedure, BANK1 ~ BANK31 compressed, mainly can be as described below.
Step 31, MCU21 carries out the compiling of program code;
Step 32, MCU21 carries out the compression of BANK (1-31) data, adopt RLE compression method, BANK0 code-group district will be put into about the kernel program code such as chip initiation and power management section data centralization, guarantee that embedded system is normally run, some other function code is loaded BANK1 ~ BANK31 region, in compilation process, the code in BANK1 ~ BANK31 region in code-group region is compressed.
Step 33, MCU21 linker storer 23, and in connection procedure, the code in BANK1 ~ BANK31 region in code-group region is compressed;
Step 34, exports executable program.
Such as, executable program is exported to the described program storage 23 connected.
As shown in Figure 4, be the schematic flow sheet of the decompression method of a kind of embedded program code of the embodiment of the present invention, can be as described below.
Step 41, embeds MCU21 and loads BANKO executive routine from program storage 23;
Step 42, system initial value;
Step 43, embeds MCU21 and loads BANK (1-31) decompression from program storage;
In embedding normal program operation process, embed the operational area that packed data that MCU21 reads in BANK1 ~ BANK31 from program storage 23 unzips to storer DDR22, wherein, system needs to spend several seconds kind decompression times.
Step 44, embeds MCU21 and carries out major cycle.
As shown in Figure 5, be the schematic flow sheet of the decompression method of a kind of embedded program code of another embodiment of the present invention, can be as described below.
Step 51, embeds MCU21 and loads BANKO executive routine from program storage 23;
Step 52, system initial value;
Step 53, embeds MCU21 and loads BANK (1-31) decompression from program storage;
In embedding normal program operation process, embed the operational area that packed data that MCU21 reads in BANK1 ~ BANK31 from program storage 23 unzips to storer DDR22, wherein, system needs to spend several seconds kind decompression times.
Step 54, embeds MCU21 and carries out major cycle.
After step 54 executes, the described micro-control unit 21 of embedded system can also 23 read in BANK1 ~ BANK31 packed data and decompresses successively successively in free segment from program storage.
In sum, the invention belongs to the large-scale embedded program system of exploitation, run time version is carried out reasonable compression and decompression, load program storer, identical program storage is made to load more run time version, realize more function, also can greatly reduce program storage device space, lower system cost.
Claims (3)
1. a compression method for embedded program code, is characterized in that, comprising:
Micro-control unit compiles program code, kernel program code data centralization about chip initiation and power management section is put into the BANK0 code-group district in code-group region, some other function code is loaded the BANK1-BANK31 in code-group region, described compiling adopts the algorithm of Run-Length Coding;
Linker storer;
In compiling and connection procedure, the code of BANK1-BANK31 is compressed;
Export executable program to described program storage.
2. a decompression method for embedded program code, is characterized in that, comprising:
Micro-control unit loads BANK0 executive routine from program storage;
System initial value;
Described micro-control unit loads BANK1-BANK31 from described program storage and decompresses;
In embedding normal program operation process, the packed data that described micro-control unit reads in BANK1-BANK31 from described program storage unzips to the operational area connecting Double Data Rate synchronous DRAM;
Described micro-control unit carries out major cycle;
Described micro-control unit also reads in BANK1-BANK31 packed data from described program storage successively and decompresses successively in free segment.
3. an embedded system, is characterized in that, comprising: micro-control unit and program storage, and wherein, described micro-control unit connects described program storage; Wherein
Described micro-control unit, for compiling program code, kernel program code data centralization about chip initiation and power management section is put into the BANK0 code-group district in code-group region, some other function code is loaded the BANK1-BANK31 region in code-group region; In compiling and connection procedure, the code of BANK1-BANK31 is compressed, export executable program to described program storage;
Described program storage, for receiving and store the code data after the compiling of described micro-control unit and compression;
Also comprise: the Double Data Rate synchronous DRAM be connected with described micro-control unit, wherein,
Described Double Data Rate synchronous DRAM, for receiving the code data after the decompression of described micro-control unit, and runs.
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| CN102360381B (en) * | 2011-09-29 | 2014-03-12 | 深圳众为兴技术股份有限公司 | Device and method for performing lossless compression on embedded program |
| CN109709837A (en) * | 2018-11-23 | 2019-05-03 | 上海琪埔维半导体有限公司 | A kind of data processing method suitable for singlechip chip |
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| CN101334736A (en) * | 2007-06-28 | 2008-12-31 | 索尼爱立信移动通信日本株式会社 | Oftware updating method and portable terminal devic |
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| CN101334736A (en) * | 2007-06-28 | 2008-12-31 | 索尼爱立信移动通信日本株式会社 | Oftware updating method and portable terminal devic |
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Effective date of registration: 20200708 Address after: 23 / F, Guangdong hi tech District Patentee after: Shenzhen Konka Holding Group Co., Ltd Address before: 518055 No. 9008 Shennan Avenue, Shenzhen, Guangdong, Nanshan District Patentee before: KONKA GROUP Co.,Ltd. |