JPS61131129A - Initial diagnostic system - Google Patents

Abstract

PURPOSE:To attain efficient operation of the system by fetching diagnostic mode information designated by a designation means as a status and executing the initial diagnostic processing so as to execute quickly after application of power the user program processing. CONSTITUTION:A microprocessor muP 2 has a means fetching the state of a switch 1 as a status. A ROM 3 has a test routine (TPS) having a short execution time for operating initial program load (IPL) and a high density test routine (TPH) for writing/reading a signal to/from a memory address. The muP 2 checks the status of the switch 1 just after application of power, and since the switch is turned off normally, the TPS routine applies a required minimum initial diagnosis and the step moves to the IPL> If the system is successful to the check just after the manufacture and the required minimum diagnosis but the system will not operate normally afterward, the step is moved to the routine TPH for detailed diagnosis to detect the fault by applying power while depressing the switch 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an initial diagnosis method used in a device having a microprocessor and having a plurality of types of diagnostic programs on a ROM.

[Technical background of the invention and its problems]

Generally, in devices having a microprocessor,
Performs initial diagnosis to detect device failure when power is turned on. In recent years, the capacity of memory has increased, and peripheral devices have become more diverse, so it takes a lot of time to diagnose everything. Therefore, in conventional devices having an existing initial diagnosis processing function, when the device is started up, Ede has to wait for a long time until his program is started.

A specific example of the conventional operation of a device having a microprocessor from power-on to starting of a user program will be described with reference to the flowchart shown in FIG.

When the power is turned on, the microprocessor starts running with the program on the ROM and performs an initial diagnosis of the circuit. When an error is detected, a failure message is displayed on the lamp or monitor.

Appropriate repairs or specific error handling are then carried out. In addition, if there is no error, the FD (floppy disk) is loaded by IPL (initial program load).
, DISK (magnetic disk\line, etc.) loads the user program onto the RAM, and the user program is started.Recently, the memory capacity that can be directly addressed by microprocessors has increased, and the amount of input/output devices added to the periphery has increased. The number of devices increases, and diagnosing them in detail requires a considerable amount of time, which forces users to wait longer before using them.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and in the initial diagnosis routine of the device, normally, the test is limited to the minimum necessary and short time, and the test is quickly transferred to the user program.
The purpose of the present invention is to provide an initial diagnosis method that allows high-density testing to be performed selectively as needed.

[Summary of the invention]

The present invention has a diagnostic mode designation means, takes in diagnostic mode information designated by the designation means as a status when executing initial diagnostic processing, and executes initial diagnostic processing of a diagnostic program or diagnostic program flow according to the diagnostic mode information. With this configuration, the time required for initial diagnosis during normal operation can be significantly reduced, user program processing can be executed immediately after power is turned on, and the system can be operated efficiently.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 is a flowchart showing the processing flow from power-on to user program execution in one embodiment of the present invention, and FIG. 2 is a manual operation switch 1 for switching the diagnostic mode provided in the above embodiment. FIG. 2 is a diagram showing an output circuit thereof. In Fig. 2, switch 1 is turned on (
The switch is turned on (ON) and outputs low-level status information that specifies detailed initial diagnosis processing, and is normally switched off (OFF) when not in operation to perform the minimum necessary initial diagnosis processing. The operation of one embodiment will now be described with reference to FIGS. 1 and 2. In the device according to the present invention, the microprocessor 2 has a means for importing the so-called switch state shown in FIG. Minimum required short running test routines (TPS)
), and the other is a high-density test routine (T
PH). Based on the above points, in the fa1 diagram, immediately after the power is turned on, the microprocessor 2 switches to the switch 1.
Check the status of.

Normally, the switch is turned off, so the minimum necessary initial diagnosis is performed and the process moves to IPL. In addition, if you perform an inspection immediately after manufacturing, or if you are using the machine and it passes the minimum necessary diagnosis but does not operate normally after that, you can conduct a detailed diagnosis by turning on the power while pressing switch 1 in Figure 2. The fault is detected by skipping to the routine that performs the following.

By providing such a mechanism for selecting the initial diagnosis mode by selecting the switch 1, the time from turning on the power to performing the initial diagnosis and transitioning to the user program can be shortened. After running the diagnostic routine, you can move on to the user program.

〔Effect of the invention〕

As described in detail above, the initial diagnosis method of the present invention has a diagnostic mode specifying means, takes in the diagnostic mode information specified by the specifying means as a status when executing the initial diagnosis process, and performs diagnosis according to the diagnostic mode information. By adopting a configuration that executes initial diagnosis processing for a program or diagnostic program flow, the time spent on initial diagnosis during normal operation can be significantly reduced, and user program processing can be executed immediately after power is turned on. The efficient operation of the system can be measured.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a flowchart showing the processing flow of the main parts in an embodiment of the present invention, FIG. 2 is a diagram showing the circuit configuration of the main parts in the above embodiment, and FIG. The figure is a flowchart showing a conventional processing flow. 1...Switch, 2...Microprocessor, 3.
... ROM. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Udepro 2 "Ram Figure 2/5v 3rd Enclosure Irido Y Knee 1° Aro 2° Kum

Claims (1)

[Claims] In an apparatus using a microprocessor having multiple types of diagnostic programs on a ROM, the device has a diagnostic mode specifying means, and when executing initial diagnosis processing, the diagnostic mode information specified by the specifying means is taken in as a status, and the diagnostic An initial diagnosis method characterized by executing initial diagnosis processing of a diagnosis program or a diagnosis program flow according to mode information.