KR930010294B1 - User program loading method - Google Patents

Abstract

The method loads user program on a main memory of PABX using ROM resident monitor debugger and comprises the steps of: (A) sending down load start signal to a loader of a host computer and requesting loading record sending; (B) processing record by a loader; (C) checking transmission error and requesting resending when transmission error is detected; and (D) sending load completion signal to a loader of a host computer and quitting a loading process when an end record is received.

Description

How to Load User Program

1 is a hardware configuration to which the present invention is applied.

2 is an overall flow chart of the present invention.

3 is a flowchart of a record transfer process of a host computer loader.

* Explanation of symbols for main parts of the drawings

1: high level processor 2: low level processor

3: signal processor 4: host computer

5: main board 6: lower level board

7: monitor 8: CPU

9: debugger 10: main memory

11: serial port 12: communication line

13: serial port of the host computer 14: loader

15: file converter

The present invention allows a ROM resident monitor debugger (hereinafter referred to as a debugger) mounted and operated on a board of an upper level processor and a lower level processor of an electronic switch to perform a function of downloading a user program. It is about a method.

Created by the host before using this function to load his or her program from the host computer (hereinafter referred to as host) to the specific board of the electronic switchboard via the RS-232C serial communication line (hereinafter referred to as the communication line). The executable file (a.out) must be converted into a file that can be transmitted over the communication line. An example of this form is the S-Record file, which is a method proposed by Motorola, which consists of three types of records: a start record, a content record, and an end record. The present invention transmits this S-record form. Adopted as file format. In the loading process, when the host loader sends a file converted into a form that can be transferred by the file converter of the host computer in a loading record unit, the file is received by the debugger and converted into a binary code form, which is a form of an executable file again. This is done by recording in the main memory device.

In the related art, in order to perform a test and execution of a user program, a separate device for downloading a program to a board is required, and there are not many problems in efficiency due to complicated procedures during debugging.

Disclosure of Invention An object of the present invention is to solve the problems of the prior art, by allowing a user program to be loaded from a host through a communication line in a debugger mounted on an electronic switchboard, without having to go to the place where the actual switchboard is located. The present invention provides a method for loading a user program configured to perform a downloading function on a monitor.

In order to achieve the above object, the present invention provides a high-level processor (MP) connected to the system bus, a low-level processor (PP) connected to the system bus, and a signal message processor (SMHP) for processing No. 7 signal messages. And a host computer connected to each of the upper level processor, the lower level processor, and the signal message processor by an RS-232C communication line, and having a debugger, a main memory device, and a serial communication port in each processor to download a user program from the host computer. A device for executing or debugging a program, the method comprising: receiving a loading command input by a user, informing a loader of a host computer to start downloading and requesting transmission of a loading record; and processing the record to a loader of the host computer Step 2, Loading from the Host Computer The third step is to request the retransmission of the record if a transmission error occurs when the transmission error occurs. If the error is not found in the contents of the record, the start record and the end record are identified. And a fourth step of notifying the loader of the host computer and terminating all executions.

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

1 is a hardware configuration diagram to which the present invention is applied, in which: (1) a high level processor (MP) for performing general voice processing, and (2) a low level processor for controlling and managing a subscriber unit and a connection switch ( PP), (3) signal message processor (SMHP) for processing No.7 signal messages, (4) host computer, (5) mainboard (MPMA), (6) lower level board (PPPA), (7) is a monitor (CRT), (8) is a central processing unit (CPU), (9) is a debugger, (10) is a main memory, (11) is a serial port, (12) is a communication line, (13) is The host serial port, 14 denotes a loader, and 15 denotes a file converter.

The monitor 7 of the user is connected to a host consisting of the serial port 13, the loader 14, and the file converter 15, so that the user can control the downloading of the program and the execution of the user program. Types of higher level processor (MP) 1 include matched exchange processor (ASP), number translation processor (NTP), internal network processor (INP), input / output control processor (MMP), operation and maintenance processor (OMP), etc. There are the same things. Types of lower level processors include Time Division Switch Processor (TSP), Space Division Switch Processor (SSP), Voice Service Processor (GSP), Analytics Subscriber Matching Processor (ASIP), Analytics Relay Line Processor (ATIP), Digital Relay Line Processor ( DCIP), Digital North American (T1) Trunk Processor (DTIP), Signal Service Processor (LSP), Line System Maintenance Matching Processor (ASMP), Central Control Maintenance Matching Processor (CCMP), Synchronous Processor (NSP), Central Such as link matching processor (CLIP), network maintenance matching processor (INMP), link matching processor (LLIP), and the like. In each board, the central processing unit 8 has arithmetic and control functions of the serial port 11 and a reference function for the main memory device 10, and character input / output is processed through the serial port 11, The debugger 9 verifies the main board 5 at startup and creates an environment in which the user can load the user program using debugger commands and then perform its execution and execution error search. The main memory has a function of storing user programs and data. The file converter 15 in the host 4 converts a user program in the form of an executable file into a file in a transferable form using the communication line 12, and the loader 14 in a transferable form by the file converter 15. It is responsible for transmitting data to the debugger 9 by recording the converted files in the serial port 13 of the host in record units, and having a transmission capacity of 9600 bits per second and the serial port 13 in the host 4. ) Are interconnected by a communication line. 2 is a flowchart showing a process of downloading a user program by the debugger.

The debugger 9 is started by receiving a loading command to be input by the user, interpreting it by the command interpreter of the debugger 9 to start the downloading function. The debugger 9 informs the loader 14 of the host 4, which is connected and operated by a communication line, to start the download function 16, and requests the loader 14 of the host 4 to transmit a loading record ( 17) Record processing is performed by the loader 14 of the host 4 (17-1), and the loader 14 opens the transmission file and transmits the content, that is, the loading record, in units of records (18). When a loading record is received (19), the search portion for detecting a transmission error in the record is examined to see if a transmission error has occurred (20). (14), the process goes to the waiting state for receiving a loading record. If the contents of the received record are received without data corruption, it is checked if the type of the received record is a start record (22), and if it is a start record, after initializing the variables controlling the loading function of the Discover 9 (23). It requests the loader 14 of the host 4 to transmit a new record, and enters the standby state for receiving the record. If the received record is not a start record, it is checked whether it is an end record (24), and if it is an end record, the loader 14 of the host 4 is informed that the loading function of the debugger 9 has been terminated (25). This completes the program download function from 4) to the electronic switchboard. If the received record is not a start or end record, the data contained in the received record is converted into an executable form of binary code (26), and then the converted data is stored in the storage pointed to by the address portion of the record. This results in downloading the contents of the received record to the main memory 10 of the board. As described above, the start and end records are transmitted only once at the beginning and the end of the loading, but the content records are included in the actual storage space of the board, and the number varies depending on the amount of programs downloaded.

3 is a detailed flowchart of the loading record transfer process 17-1 performed by the host loader.

The loader 14 of the host 4 waits for a transfer control special character requesting the transfer or retransmission of the loading record from the debugger 9 (28) and if it recognizes the transfer or retransmission request (29), the received request is recorded. If it is satisfied that the transfer request is satisfied (30), it reads one record of the transfer file already converted by the file converter and stores it in the transfer buffer (31), and transfers the contents of the transfer buffer to the debugger (32). . If the requested form is a record retransmission, it is determined whether the content of the record currently stored in the buffer has been reclaimed three times consecutively (33), or if the number of re-requests from the debugger (9) for the same record is less than three By retransmitting the record stored in the transmission buffer, the transmission error that occurred before is overcome, and if retransmission is requested three times consecutively for the same record from the debugger 9, it is impossible to recover the data in the loading record or on the transmission path and communication line. It is assumed that an error has occurred and the loading failure process (34) causes the loader 14 to exit the loading procedure and then terminates.

By implementing such a function, the user can load the program into the main memory device and prepare the basis to execute it, thereby eliminating the inconvenience that the user directly writes the program to be debugged using the debugger command in the main memory device. This has the effect of improving debugging efficiency.

Claims (2)

An upper level processor (MP) 1 connected to the system bus at the electronic switchboard, a lower level processor (PP) 2 connected to the system bus, and a signal message processor 3 for processing No. 7 signal messages; It consists of a host computer 4 connected to an upper level processor 1, a lower level processor 2, and a signal message processor 3 by an RS-232C communication line, and a debugger 9 in each of the processors 1, 2, 3. In the user program loading method is applied to a device that has a main memory device (10) and a serial communication port (11) to download a user program from the host computer (4) to execute or debug the program; The first step of informing the loader 14 of the host computer 4 to start downloading and receiving the loading instruction input by the user and requesting the transmission of the loading record, the loader 14 of the host computer 4 processes the record. In the second step, if a loading record is received from the host computer 4, the transmission error is checked and a third step is required to request retransmission of the record if a transmission error occurs. Resident ROM of the electronic switchgear characterized by comprising a fourth step of determining whether or not the end record has been received and notifying the loader 14 of the host computer 4 when the end record is received. How to load user program of monitor debugger. The method according to claim 1, wherein the second step checks whether a record transfer request is received from the debugger 9, and if it satisfies the request, reads one record and stores it in the transfer buffer and stores the contents of the transfer buffer. 9) In the case of a record retransmission request, it is determined whether the retransmission request of the debugger 9 has been consecutive three times. If it is not three consecutive times, the contents of the transmission buffer are transmitted to the debugger. The user program loading method of the ROM (ROM) resident monitor debugger of the electronic switchboard, characterized in that the step of performing a loading failure processing is assumed to occur.