KR960018927A

KR960018927A - Program download method using serial I / O

Info

Publication number: KR960018927A
Application number: KR1019940031923A
Authority: KR
Inventors: 강택찬
Original assignee: 이헌조; 엘지전자 주식회사
Priority date: 1994-11-30
Filing date: 1994-11-30
Publication date: 1996-06-17

Abstract

본 발명은 프로그램을 다수개의 부분 블럭으로 분리한 후, 상기 분리된 각각의 부분 블럭에 체크섬 코드(CHECKSUN CODE)를 포함시켜 부분 블럭의 프로그램 에러 상태를 검출하여 에러가 검출된 블럭만을 재전송할 수 있도록 한 직렬식 입출력을 이용한 프로그램 다운 로딩 방법에 관한 것으로, 종래에는 호스트 시스템에서 전송된 프로그램을 다운 로딩할 경우 전송된 프로그램의 크기가 방대할때 체크섬 로드부(4)에서는 전송된 프로그램의 에러상태를 정확하게 체크하므로서 다른 에러 체크 방법이 요구되는 문제점이 있었다.The present invention divides a program into a plurality of partial blocks, and then includes a checksum code in each of the separated partial blocks to detect a program error state of the partial blocks so that only the blocks in which the errors are detected can be retransmitted. A program download method using a serial input / output method. In the related art, when downloading a program transmitted from a host system, when the size of the transmitted program is large, the checksum load unit 4 accurately corrects an error state of the transmitted program. There was a problem that a different error checking method was required.

본 발명은 이와 같은 종래 문제점을 해결하기 위하여 호스트 시스템에서 전송되는 프로그램의 크기가 방대할때 이를 다수개의 부분 블럭으로 분리한 후 분리된 각각의 부분 블럭에 에러상태를 검출하는 체크섬 코드를 포함시키므로서 각각 분리된 부분 블럭의 에러상태를 체크하여 에러가 체크된 프로그램만을 재전송받을 수 있도록 하므로서 프로그램의 크기에 관계임이 정확하게 에러를 체크하여 호스트 시스템에서 전송된 프로그램을 다운 로딩할 수 있도록 한 것으로, 프로그램 전송 기기에 적용한다.In order to solve such a conventional problem, when the size of a program transmitted from a host system is large, the present invention divides it into a plurality of partial blocks and includes a checksum code for detecting an error state in each of the separated partial blocks. By checking the error status of the separated partial block so that only the program whose error is checked can be retransmitted, it is possible to download the transmitted program from the host system by accurately checking the error related to the program size. Applies to

Description

Program download method using serial I / O

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제3도는 본 발명 호스트 시스템으로부터 프로그램을 다운 로딩 하는 방법을 보인 플로우차트.3 is a flowchart showing a method of downloading a program from the host system of the present invention.

Claims

The first step of setting the environment for performing downloading when starting downloading, and if the environment is set, input the program transmitted from the host, read a part of the program transmitted afterwards, and then check the error status of each separated program. A second step of checking, a third step of decreasing the retry count set in step 1 by “1” if an error is checked in the program as an error check result, and a program transmitted from the host if the retry count decrease result is “0” Since this is an error, an error signal and a download downloading end signal are transmitted to the host, and the downloading is terminated. If the retry count is not 0, it is not an error stopper. Therefore, a retry signal is transmitted to the host for retransmission of the program. If the error is not checked in the program as a result of checking in the second process and the second process, A fifth step of determining whether the transmission of the program is completed by transmitting the program to the destination address 11 and updating the destination address 11; and if the program transmission is pigmented, the error-free signal and the download end signal are transmitted. Since the program is correctly downloaded by sending it to the host, the downloading is terminated. If the program is not completed, the serial program is composed of 6 steps of continuously checking the error state through the second process. Program download method.

※ Note: The disclosure is based on the initial application.