CN101201741A - Circuit capable of on-line system programming and method for on-line system programming - Google Patents
Circuit capable of on-line system programming and method for on-line system programming Download PDFInfo
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- CN101201741A CN101201741A CNA2006101194033A CN200610119403A CN101201741A CN 101201741 A CN101201741 A CN 101201741A CN A2006101194033 A CNA2006101194033 A CN A2006101194033A CN 200610119403 A CN200610119403 A CN 200610119403A CN 101201741 A CN101201741 A CN 101201741A
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Abstract
The invention discloses a circuit which supports online system programming, and the invention comprises a program memory and a data memory, wherein, the program memory is connected with a program memory bus, and the data memory is connected with a selector circuit which is connected with a data memory bus and the program memory bus. The invention also discloses a method for online system programming, which switches the data memory to the program memory bus by the selector circuit and runs a program for online system programming which is stored in the data memory to update the programs in the program memory. The method for online system programming provided by the invention has simple steps and convenient implementation, and the circuits adopted by the invention have the advantages of simple structure, low cost and easy production.
Description
Technical field
The present invention relates to a kind of logical circuit, but the circuit of especially a kind of on-line system programming.The invention still further relates to a kind of method of on-line system programming
Background technology
Sheet storage unit such as data-carrier store, program storage that present microcontroller chip is all integrated usually, wherein for system upgrade or debugging than the convenience of complication system, can use programmable program storage usually, as EEPROM, EFLASH etc.How this will inevitably run into the problem to the program storage programming, if requirement can not make system cut-off in the programming process, just this moment, nature will be used on-line system programming technique (ISP).
The circuit structure that is often implemented in the wire system programming at present can comprise two program storages referring to shown in Figure 1, the main program memory when one of them normally moves as system; On-line system program storer (ISP program storage) when another is programmed as ISP, main program memory and ISP program storage are connected on the program memory controller of a band ISP control function, and the program memory controller of described band ISP control function is connected on the program storage bus.Comprise also in the circuit that one is connected to data-carrier store on the data ram bus by the data-carrier store read-write control circuit.When system normally moves, the program memory controller of band ISP control function is connected to main program memory on the programmed control bus, program on the operation main program memory, and data-carrier store is communicated with data ram bus by its read-write controller control.If detect the request of ISP, then the program memory controller with the ISP control function switches to the ISP program storage with the program storage bus, utilizes the on-line system program that is kept in advance in the ISP program storage to carry out the on-line system programming then.
Because will adopt the method for two program storages to realize ISP, this can cause following two shortcomings:, may increase the difficulty or the complexity of technology if one adopt the program storage of different kinds; Even if two adopt storer of the same race also will inevitably increase the cost of product.
Summary of the invention
Technical matters to be solved by this invention is, but the circuit that provides a kind of on-line system to programme, and the enough better simply structures of energy be implemented in the wire system programming, thereby reduce the difficulty and the complexity of manufacture craft, reduce the cost of product simultaneously.
For solving the problems of the technologies described above, but the technical scheme of the circuit of the present invention's on-line system programming is, comprise a program storage and a data storer, described program storage is connected to the program storage bus, described data-carrier store is connected to a selector circuit, and described selector circuit is connected to data ram bus and program storage bus.
Another technical matters to be solved by this invention is that the method that provides a kind of on-line system to programme can be used better simply circuit structure, is implemented in the wire system programming.
For solving the problems of the technologies described above, the technical scheme of the method for on-line system programming of the present invention is to comprise the steps:
(1) the on-line system program in the described program storage is copied in the described data-carrier store;
(2) described selector circuit switches to the program storage bus, and described data-carrier store is connected with described program storage bus;
(3) the on-line system program on the described data-carrier store of operation upgrades the program on the described program storage;
(4) after program updates finished, described selector circuit switched to data ram bus, and described data-carrier store is connected to data ram bus.
On-line system programmed method provided by the invention, step is easy, is easy to realize that the circuit structure that it adopted is simple, and is with low cost, is easy to make.
Description of drawings
The present invention is further detailed explanation below in conjunction with drawings and Examples:
But Fig. 1 is the structural representation of the circuit of existing on-line system programming;
But Fig. 2 is the structural representation of the circuit of the present invention's on-line system programming.
Embodiment
But the structure of the circuit of the present invention's on-line system programming can be referring to shown in Figure 2, comprise a program storage and a data storer, described program storage is connected to the program storage bus, described data-carrier store is connected to a selector circuit, and described selector circuit is connected to data ram bus and program storage bus.Described selection circuit can switch data memory bus and program storage bus, promptly according to instruction data-carrier store is connected with data ram bus, perhaps data-carrier store is connected with the program storage bus.
Described program storage is connected on the described program storage bus by a program storage control circuit, described program storage control circuit can the control program storer read-write operation, a configuration register that is used for controlling described selector circuit and described program storage control circuit is connected respectively to described selector circuit and described program storage control circuit.Described configuration register can be connected with arithmetical unit, perhaps is connected with other module that can send instruction, and instruction storage in this configuration register, is controlled described selector circuit and described program register control circuit carries out corresponding action then.
Comprise the read-write control circuit that the data storer is controlled in the described selector circuit.
In the normal operation of system, described program storage is connected to the program storage bus, and data-carrier store is connected to data ram bus, and system is by program storage bus read routine, operation that the data storer is read or write afterwards from the program storage.
The present invention also provides a kind of method of carrying out the on-line system programming with foregoing circuit, comprises the steps:
(1) the on-line system program in the described program storage is copied in the described data-carrier store;
(2) described selector circuit switches to the program storage bus, and described data-carrier store is connected with described program storage bus, and the described program storage of described program storage control circuit is set to " writing " state;
(3) the on-line system program on the described data-carrier store of operation upgrades the program on the described program storage;
(4) after program updates finished, described selector circuit switched to data ram bus, and described data-carrier store is connected to data ram bus, and the described program storage of described program storage control circuit is set to " reading " state.
The action of described program storage control circuit and described selector circuit is unified control and management by described configuration register.
Usually all storer can be arranged usually in the system level chip now, storer can take the major part area of system, but compare with the circuit of existing on-line system programming, the present invention will realize in the common microcontroller chip that needed two program storages able to programme of ISP are reduced to one, this will significantly reduce area of chip, thereby reduce the manufacture difficulty and the cost of product.
Claims (6)
1. but the circuit of on-line system programming, it is characterized in that, comprise a program storage and a data storer, described program storage is connected to the program storage bus, described data-carrier store is connected to a selector circuit, and described selector circuit is connected to data ram bus and program storage bus.
2. but the circuit of on-line system programming according to claim 1, it is characterized in that, described program storage is connected on the described program storage bus by a program storage control circuit, and a configuration register that is used for controlling described selector circuit and described program storage control circuit is connected respectively to described selector circuit and described program storage control circuit.
3. but the circuit of on-line system programming according to claim 1 is characterized in that, comprises the read-write control circuit that the data storer is controlled in the described selector circuit.
4. a method of carrying out the on-line system programming with circuit as claimed in claim 1 is characterized in that, comprises the steps:
(1) the on-line system program in the described program storage is copied in the described data-carrier store;
(2) described selector circuit switches to the program storage bus, and described data-carrier store is connected with described program storage bus;
(3) the on-line system program on the described data-carrier store of operation upgrades the program on the described program storage;
(4) after program updates finished, described selector circuit switched to data ram bus, and described data-carrier store is connected to data ram bus.
5. the method for on-line system programming according to claim 4, it is characterized in that, before the on-line system program on the described data-carrier store of described (3) step operation, the described program storage of described program storage control circuit is set to " writing " state; After described (4) step program updates finished, the described program storage of described program storage control circuit was set to " reading " state.
6. the method for on-line system programming according to claim 4 is characterized in that the action of described program storage control circuit and described selector circuit is unified control and management by described configuration register.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101194033A CN101201741A (en) | 2006-12-11 | 2006-12-11 | Circuit capable of on-line system programming and method for on-line system programming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101194033A CN101201741A (en) | 2006-12-11 | 2006-12-11 | Circuit capable of on-line system programming and method for on-line system programming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101201741A true CN101201741A (en) | 2008-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101194033A Pending CN101201741A (en) | 2006-12-11 | 2006-12-11 | Circuit capable of on-line system programming and method for on-line system programming |
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| CN (1) | CN101201741A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916588A (en) * | 2010-08-23 | 2010-12-15 | 中国航天科技集团公司第九研究院第七七一研究所 | In-system-programming (ISP) module and method thereof for in-system-programming of FPAA |
| CN102565671A (en) * | 2011-12-16 | 2012-07-11 | 电子科技大学 | Dynamic allocation method for on-line programming of integrated circuit tester |
| CN102637009A (en) * | 2012-04-25 | 2012-08-15 | 山东省计算中心 | Online programmable controller and implementation method thereof |
-
2006
- 2006-12-11 CN CNA2006101194033A patent/CN101201741A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916588A (en) * | 2010-08-23 | 2010-12-15 | 中国航天科技集团公司第九研究院第七七一研究所 | In-system-programming (ISP) module and method thereof for in-system-programming of FPAA |
| CN102565671A (en) * | 2011-12-16 | 2012-07-11 | 电子科技大学 | Dynamic allocation method for on-line programming of integrated circuit tester |
| CN102565671B (en) * | 2011-12-16 | 2013-12-11 | 电子科技大学 | Dynamic allocation method for on-line programming of integrated circuit tester |
| CN102637009A (en) * | 2012-04-25 | 2012-08-15 | 山东省计算中心 | Online programmable controller and implementation method thereof |
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