KR20000051669A - Apparatus and method for transplanting system program using internal memory and external memory - Google Patents

Abstract

PURPOSE: A system program porting apparatus and method is provided to make it easy porting a program in a system with an EEPROM(electrically erasable programmable read only memory). CONSTITUTION: A system program porting apparatus comprises a microprocessor(101), a memory selection circuit(102), an internal memory(103), a connector(104) and an external memory(105). The internal memory(103) is an EEPROM(electrically erasable programmable read only memory), and the external memory(105) is a ROM or a flash memory having codes for re-programming the internal memory(103). The connector(104) is for connecting the external memory(105) to the system, and if the external memory(105) is connected to the system, its address space is overlapped with the address space of the internal memory(103). The memory selection circuit(102) selects one between an internal memory selection signal(/M1_Select) and an external memory selection signal(/M2_Select).

Description

System program porting apparatus using memory overlap and its method {APPARATUS AND METHOD FOR TRANSPLANTING SYSTEM PROGRAM USING INTERNAL MEMORY AND EXTERNAL MEMORY}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system program implantation apparatus using memory overlap and a method thereof, and a computer readable recording medium storing a program for realizing the same.

Conventionally used nonvolatile memory (ROM, etc.) was almost impossible to reprogram on the applied system. When the program was changed, disassembly of the device, memory replacement and reassembly were necessary. In this process, the cost increases and there is a problem that it is difficult to apply a new program to the device when changing the program.

Accordingly, the present invention has been made to solve the above problems, the microprocessor can select the two memory when the external memory to connect the program to the memory using the reprogrammable memory in the system SUMMARY OF THE INVENTION An object of the present invention is to provide a system program implantation apparatus and method for porting a program from an external memory to an internal memory using a circuit, and a computer-readable recording medium having recorded thereon a program for realizing the program.

1 is a configuration diagram of an embodiment of a system program implantation apparatus according to the present invention;

2 is a block diagram of a memory selection circuit of a system program implantation apparatus according to the present invention;

3 is a flowchart of an embodiment of a system program porting method according to the present invention;

* Explanation of symbols for the main parts of the drawings

101: microprocessor 102: memory selection circuit

103: internal memory 104: connector

105: external memory

According to an aspect of the present invention, there is provided a system program implantation apparatus comprising: first storage means for storing a reprogrammable program located inside a system; Second storage means for storing a target program that is located outside the system and to update a program of the first storage means; Connecting and disconnecting means for connecting and disconnecting a system and said second storage means; Processing means for reading a program of the second storage means and updating the program of the first storage means; And selection means for selecting the first storage means or the second storage means in accordance with a selection signal of the processing means.

In addition, the present invention provides a system program transplantation method applied to a system program implantation apparatus, comprising: a first step of checking whether an external memory is connected and reading predetermined data of the external memory; Converting the memory into the internal memory to write predetermined data read from the external memory into the internal memory; And a third step of confirming whether all data to be updated is written to the internal memory, and converting the memory to an external memory to repeat reading predetermined data of the external memory of the first step.

The present invention also provides a system program implantation apparatus having a processor, comprising: a first function of checking whether an external memory is connected and reading predetermined data of the external memory; A second function of converting the memory into the internal memory to write predetermined data read from the external memory into the internal memory; And a computer for recording a program for realizing a third function of repetitively performing the process of reading predetermined data from the external memory of the first function by checking whether all data to be updated has been recorded in the internal memory. Provide a readable recording medium.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of an embodiment of a system program implantation apparatus according to the present invention, which includes a microprocessor 101, a memory selection circuit 102, an internal memory 103, a connector 104, and an external memory 105. do.

As shown in the figure, the internal memory 103 is a memory used in the system and is a reprogrammable memory such as a flash memory, an electrically erasable programmable read only memory (EEPROM), and the external memory 105 is an internal memory 105. It can be configured as any memory that can be connected to the circuit such as ROM, flash memory, EEPROM, etc., which contains the code for reprogramming.

The connector 104 has a structure capable of connecting / disconnecting the system and the external memory 105. When the external memory 105 is connected, the connector 104 overlaps the internal memory 103 and the address space.

The memory selection circuit 102 combines an internal memory selection signal / M1_Slect output from the microprocessor 101 with an external memory detection signal / M2_Detect and an internal memory or external memory setting signal / M_Change. A signal for selecting one of the / M1_Select signal for selecting the internal memory 103 or the / M2_Select signal for selecting the external memory 105 in the address space is output.

2 is a configuration diagram of a memory selection circuit of a system program implantation apparatus according to the present invention.

As shown in the figure, the / M_Select signal is a signal for selecting a memory in the microprocessor, and the / M_Select signal is output as one of the / M1_Select signal and the / M2_Select signal by the memory selection circuit. At this time, the memory selection circuit determines whether an external memory is connected by using the / M2_Detect signal, and selects the internal memory and the external memory according to the / M_Change signal only when the external memory is connected. In the memory selection circuit of FIG. 2, the internal memory is selected when the / M_Change signal is high, and the external memory is selected when the / M_Change signal is low.

Table 1 below shows a low active Truth Table for the memory selection circuit of FIG.

Due to the nature of the system, it is not possible to connect or disconnect external memory while the power is on. Thus, when the system accesses the memory in the ON state, it has one of two initial states.

(Table 2) below is a low active truth table when the power is ON when the external memory is not connected, and (Table 3) below is the power ON when the external memory is connected. The low active truth table of the case.

In addition, when an update program for porting a program from an external memory to an internal memory is started, the microprocessor determines whether the external memory is present or not based on whether / M2_Detect is high or low. If there is no external memory, the update program finishes running.

If there is an external memory, the program is read from the external memory. At this time, one byte or a predetermined block (several bytes-several tens of bytes) can be read. After reading the target to update, the memory is converted to internal memory and written (ie, the microprocessor changes / M_Change from low to high as shown in Table 4 below).

3 is a flowchart of an embodiment of a system program porting method according to the present invention.

As shown in the figure, it is checked whether the external memory is connected (301), if the external memory is connected, read predetermined data of the external memory (302), and switch the memory to the internal memory (303) in the external memory The read predetermined data is written to the internal memory (304).

Thereafter, if all data to be updated are recorded in the internal memory (305), if not all are recorded, the memory is switched to the external memory (306), and the predetermined data of the external memory is repeatedly read.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains, and the above-described embodiments and accompanying It is not limited to the drawing.

In the present invention as described above, since the system internal memory and the external memory can be selected separately, the contents of the external memory can be ported to the internal memory using software, thereby eliminating the need to disassemble the assembled system. You can change the program of the system by connecting the contents of the external memory to the internal memory by connecting to the system.In case that only the program of the system, such as each country or language, is changed individually when the system is produced, the necessary programs are transferred after mass production. It can work.

Claims (5)

In the system program implantation device, First storage means for storing a reprogrammable program located within the system; Second storage means for storing a target program that is located outside the system and to update a program of the first storage means; Connecting and disconnecting means for connecting and disconnecting a system and said second storage means; Processing means for reading a program of the second storage means and updating the program of the first storage means; And Selection means for selecting the first storage means or the second storage means in accordance with a selection signal of the processing means; System program implantation device using a memory overlap comprising a. The method of claim 1, The first storage means, System program implantation apparatus using memory overlap, characterized in that the non-volatile memory. The method according to claim 1 or 2, The second storage means, System program implantation apparatus using memory overlap, characterized in that the non-volatile memory. In the system program porting method applied to the system program porting device, A first step of checking whether the external memory is connected and reading predetermined data of the external memory; Converting the memory into the internal memory to write predetermined data read from the external memory into the internal memory; And A third step of checking whether all data to be updated has been written in the internal memory, and switching the memory to the external memory and repeating the process of reading predetermined data of the external memory of the first step System program porting method using a memory overlap comprising a. In a system program implantation device having a processor, A first function of checking whether an external memory is connected and reading predetermined data of the external memory; A second function of converting the memory into the internal memory to write predetermined data read from the external memory into the internal memory; And A third function which checks whether all the data to be updated has been written in the internal memory, switches the memory to the external memory, and repeats the process of reading predetermined data from the external memory of the first function A computer-readable recording medium having recorded thereon a program for realizing this.