JPS5920144B2 - Diagnostic control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides control memory and μ
The present invention relates to a diagnostic control method that simply and easily realizes a diagnostic circuit that confirms the normality of a p-execution control circuit and enables automatic diagnosis.

Conventionally, for example, in the case of a data channel device incorporating a data processing device that operates under a microprogram control method,
A control command register is provided in which a control command is set in accordance with a control command from the outside, and the data channel device is activated by setting the control command from the outside. In a control command activated microprogram (hereinafter abbreviated as .mu.p) control type device such as the data channel device, the circuit configuration provided for diagnosis has conventionally been considered to be ancillary. For this reason, the diagnostic control command for diagnosis is configured to be input by manual operation such as key input. Therefore, in the control command activated microprogram control system device as described above, the
In order to confirm the normality of the control memory and the μP practical control circuit, it is necessary to have a command transmission path for diagnostic control commands for diagnosis independent of the command transmission path for general control commands from the outside.
Diagnosis has been performed based on so-called dual control commands. In particular, since diagnostic control commands for diagnosis are set manually, there is a drawback that automatic diagnosis is impossible. Furthermore, since the command transmission path was configured separately for general control commands and diagnostic control commands, there was a drawback that the normality of each command transmission path could not be guaranteed. That is, there is no means to guarantee whether or not the diagnostic control command has been set correctly, and the diagnosis has been performed assuming that it has been set correctly. 1st
The figure shows an example of a conventional control command activated microprogram control system device, in which 10 is a general control command register, 11 is a general control command register;
is μp control circuit, 12 is μp address register,
13 is a control memory, 14 is a μp address step circuit, 15
16 is a diagnostic control command register, 16 is a diagnostic control information register, and 17 is a μp address verification circuit.

μ corresponding to a series of control operations based on the following arbitrary control commands
An example will be described in which the normality of the control memory and the .mu.p execution control circuit is confirmed by tracing the p address history by sequentially executing and stopping the .mu.p addresses.

That is, when a diagnostic control command to stop execution at an arbitrary μp address is manually placed in the diagnostic control command register 15 through line 106, the execution stop μp address at which execution should be stopped based on the command is set on line 107. The information is stored in the diagnostic control information register 16 through the diagnostic control information register 16.

On the other hand, a general control command is placed in the general control command register 10 through line 101 from, for example, an external data processing device. The general control command placed in the general control command register 10 is passed through a line 102 to activate the μP execution control circuit 11. The μp execution control circuit 11 includes a μp address register 12, a control memo 1 river 3, and a μp address increment circuit 14.
control operation information corresponding to a series of control operations is stored in the control memory 13 while incrementing or updating the μp address.
The data is sequentially read from the .mu.p execution control circuit 11 and executed within the .mu.p execution control circuit 11. At this time, the .mu.p address information is sent to the control memory 13 and at the same time, it is also sent to the .mu.p address matching circuit 17. When the μp address information matches the execution stop μp address stored in the diagnostic control information register 16, the μp address verification circuit 17 instructs the μp execution control circuit 11 to stop μp execution through line 109. In this way, conventionally, the μP address history corresponding to a series of control operations is controlled by manually issuing diagnostic control commands and sequentially executing and stopping them independently of normal general control commands from the outside. Diagnosis was being performed to confirm the normality of the memory and μP execution control circuit. This has the drawback of requiring a great deal of time and manpower. Furthermore, as mentioned above, since the diagnosis assumes that the diagnostic control command register 15 and the diagnostic control information register 16 are normal, it is necessary to prevent failures, and the hard core of the valley circuit configuration described above must be large. There were unavoidable flaws.
In order to eliminate these drawbacks, the present invention provides a diagnostic control command as one of the control commands from the outside and shares a control command register, thereby providing simple and easy control under a unified control command. The purpose is to enable automatic diagnosis using a diagnostic circuit.

A detailed explanation will be given below with reference to the drawings. FIG. 2 shows an embodiment of the present invention, in which 20 is a control command register, 21 is a μp execution control circuit, 22 is a μp address register, 23 is a control memory, 24 is a μp address increment circuit, and 25 is diagnostic control information. Register, 26 is μp address verification circuit, 27,2
Reference numerals 8 denote gate circuits, one of which is selected to activate the μP execution control circuit 21 or to place a number in the diagnostic control information register 25, depending on the content of the control command.

Hereinafter, based on the present invention, the normality of the control memory and the μp execution control circuit is checked by sequentially stopping and tracking the μp address history corresponding to a series of control operations based on arbitrary control commands. Let's talk about when to check. That is, a diagnostic control command for stopping execution at an arbitrary μp address is entered into the control command register 20 from the outside through a line 201.

Since the content of the control command is a diagnostic control command, the gate circuit 28 is opened and the execution stop μp address based on the control command is set in the diagnostic control information register 25 through the line 203. Following this diagnostic control command, a general control command is placed in the control command register 20 through line 201. Since the content of the control command is a general control command, the gate circuit 27 is opened and the μP actual control signal is passed through the line 202.
Activate the control circuit 21. The 1tp execution control circuit 21 is μp
Control operation information corresponding to a series of control operations is sequentially read from the control memory while incrementing or updating the .mu.p address by controlling the address register 22, control memory 23, and .mu.p address increment circuit 24.

The μp address information is sent to the control memory 23 and also to the μp address matching circuit 26 at the same time. When the μp address information matches the execution stop μp address stored in the diagnostic control information register 25, the μp address verification circuit 26 instructs the μp execution control circuit 21 to stop μp execution through line 209. In this case, even if the diagnostic control command is set in the control command register 20 shown in the figure by mistake, in such a case, the general control command will not match the control command shown in the figure. Command register 2
Naturally, an error occurs when it is set to 0, and this error can be detected.

As explained above, by issuing diagnostic control commands and general control commands from the outside in a unified manner, the μp address history corresponding to a series of control operations can be successively followed, thereby making automatic diagnosis possible.

Furthermore, by simply adding gate circuits 27 and 28 to the diagnostic circuit, no diagnostic control command register is required, and the circuit configuration can be simplified accordingly. Furthermore, since the control command register is used both for diagnosis and for general purposes, failures can be detected in advance.

[Brief explanation of the drawing]

FIG. 1 shows an example of a diagnostic circuit section in a conventional control command-activated microprogram control system, and FIG. 2 shows an embodiment of the diagnostic circuit section in a control command-activated μP control system according to the present invention. In the figure, 20 is a control command register, 21 is a μp execution control circuit, 22 is a μp address register, 23 is a control memory,
24 represents a μp address increment circuit, 25 represents a diagnostic control information register, and 26 represents a μp address verification circuit.

Claims (1)

[Claims] 1. A control memory that stores control operation information, and a microprogram execution control circuit that executes a series of control operations by sequentially reading the contents of the control memory based on external control commands. In a control command starting microprogram system device, a diagnostic control command and a general control command for performing normal control operations are configured to be transmitted from the outside through a common path, and the control commands are set in common. It has a register, and is configured to activate a microprogram execution control circuit in the case of the above-mentioned general control command, and to set diagnostic control information based on the diagnostic control command in the diagnostic control information register in the case of the above-mentioned diagnostic control command. , based on the diagnostic control information set in the diagnostic control information register via the control command register and the general control command for starting the microprogram execution control circuit via the control command register, A diagnostic control method characterized in that a circuit configuration including a memory and the microprogram execution control circuit is diagnosed. 2. The control command register is provided with a selection gate circuit on the output side, and by switching the selection gate circuit, activation of the microprogram execution control circuit and information set for the diagnostic control information register are switched. A diagnostic control method according to claim 1, characterized in that: