JPS60163153A - Controller - Google Patents

Abstract

PURPOSE:To use the titled controller as a monitor between controllers connected serially on an interface by providing both functions to one controller as a master and a slave controller and operating independently both of the said functions. CONSTITUTION:An interface switching logic 11 is a logic controlling transmission/reception of a control signal via an interface and decides whether a control signal A is a signal transmitted to the interface via an exclusive driver or a signal received via an exclusive receiver. A control block switch logic 12 switches the controller so as to be operated as a master or a slave controller and switches control logical blocks 13, 14. This is conducted by using a switching signal 101 or a timing signal from a timing generation circuit 16. Then exclusive memory register groups 15, 17 to control independently the master/ slave control program are provided.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to control devices that are serially connected on an interface, and particularly relates to control devices that are connected serially on an interface, and in particular, when one control device is connected as a main control device or a secondary control device on the same interface. This invention relates to a control device that can operate as a controller.

[Background of the invention]

Traditionally, for example, the System Supervisory Processor (SVP) interface of a central processing unit.

the main control device that controls usage rights on the interface;
In other words, the monitoring device and the subordinate control device, that is, the devices to be monitored, are each configured separately, and the functions of the subordinate control device or the subordinate control device are the same as those of the main control device. It was not configured to have any functionality. Therefore, for example, when checking or adjusting the operation of the main control device or the slave control device connected to it, a dedicated debug machine or a monitoring device or other adjustment tool is used to check the operation, Adjustments were being made. However, operation confirmation and adjustment work using these adjustment jigs is not an easy task, and in order to improve the efficiency of adjustment and operation confirmation, it is necessary to synchronize with the control device to be adjusted on the interface. A control device that can confirm operation is required.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned points, and it is an object of the present invention to provide a control device that can function as either a main control device or a secondary control device with a small amount of hardware, and furthermore, it is an object of the present invention to The object of the present invention is to provide a control device that can be used as a monitor device or a debugging tool to check the operation between control devices that are serially connected to each other.

[Summary of the invention]

The key point of the present invention is that a single control device is provided with the functions of both a main control device and a slave control device, and that both functions can be operated independently. This allows it to be used as a monitoring device or debugging tool for checking the operation of mutual control devices.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a diagram showing a connection state between a main control device and a subordinate control device in the present invention. As shown in the figure, a main control device 1 and a plurality of subordinate control devices 2-1, 2-2...2-
n are serially connected on the interface. Control signals sent from the main control device 1 via the interface cause the control bags W2-1. l-2...
2-n works.

A feature of the present invention is that the same control device has the functions of the main control device 1 and the secondary control device 2. The main/slave control functions are switched by an external switching signal or by a timing signal inside the control device, and the hardware resources are changed so that the main/slave control programs can operate independently. By having one control device as the main control device 1 or the sub-control device 2, dynamic switching between main and sub-control functions is performed.

FIG. 2 is a functional block diagram showing the logical structure of master and slave control functions. As shown, the same controller has interface switching logic 11. control block switching logic 12;
It has a main control logic block 13 and a slave control logic block 14, and each control logic block 13.14 is connected to a register group, a dedicated memory 1.5.17, and a timing generation circuit 16, respectively.

The interface switching logic 11 is a logic that controls the transfer of control signals via the interface, and determines whether the control signal A is to be sent out onto the interface via a dedicated driver or received via a dedicated receiver.

FIG. 3 shows an example of interface switching logic.

In the interface switching logic shown in the figure, the interface signals 102, 103 are sent to dedicated drivers 22, 24, .
It is delivered via a dedicated receiver 21.23. When operating as a slave control device, the interface signal 102 is a sending signal and the interface signal 103 is a receiving signal.

By setting the inhibit signal 104 to ``1'', the gate 25 is closed and the operation of sending the signal 105 to the interface via the driver 22 is suppressed, and regarding the interface signal 103, only the operation of receiving or receiving is valid.Interface Regarding the signal 102, the signal received through the receiver 23 is inhibited from being taken in by the inhibit signal 104, and is sent to the driver 2.
Only drive operation No. 4 is valid. When operating as a main control device, interface signals 102°103
The receive and drive operations are reversed, but is it a deterrent signal? f+,
It is clear that operation is guaranteed by setting O/l to '0''.

Next, the control block switching logic 12 switches whether this control device operates as a main control device or a subordinate control device, and operates the control logic block (main) 13 in FIG. The control logic block (slave) 14 is operated. Switching between the main and slave control functions is performed by an external switching signal 101 or by a timing signal from a timing generation circuit 16 provided within the control device.

FIG. 4 shows an example of control block switching logic.

In the control block switching logic shown in the figure, a timing signal 106 from a timing generation circuit 16 inside the control device is
It is assumed that the execution order control of the main control block and slave control blocks as shown in FIG. 6 is performed by execution sequence control signals 109 and 110 controlled by external inhibition signals 107 and 108. In other words, the execution cycles of the main control block 13 and the slave control block 14 are switched by the timing signal 106, and the inhibition signal 107,
108, it is determined whether the execution cycle of each control block is a valid cycle or an invalid cycle. Inhibition signal 1
07 and 108 are both invalid ("O"), the timing signal 106 causes the execution cycles A and B of the main control block 13 and the slave control block 14 to alternate, and the fifth
The execution sequence is shown in Figure (1). In addition, deterrent signal 10
7 is valid (“1”), inhibition signal 108 is invalid (“O”)
In this case, execution cycle B of the slave control block 14 shown in (2) of FIG. 5 is an invalid cycle of the main control block 13.
This is an execution sequence in which only one execution cycle A appears. Inhibition signal 107 is disabled ("O''), inhibition signal 1.
It is clear that in the case where 08 is valid ("1"), the execution sequence shown in FIG. 5(3), in which only the execution cycle B of the main control block 14 appears, is obtained. Either one control device is operated as the main control device by the above means, or
Decide whether to operate as a subordinate control device.

Master control logic block 13 and slave control logic block 14
For example, it has hardware resources such as a dedicated memory and register groups 15 and 17 so that the main and slave control programs can operate independently under the same processor. Master control logic block 13 and slave control logic block 14 and dedicated memory and register groups 15 and 17, respectively.

For example, main control logic block 1
3 receives data from the dedicated memory and register group 15 and sends it out onto the interface, and the slave control logic block 14 stores the data received via the interface in the dedicated memory and register group 17.

Furthermore, in the control device of the above embodiment, it is also possible to adopt a method in which the main and slave control logic blocks 13 and 14 share hardware resources, thereby reducing the amount of hardware. can.

As described above, in the above embodiment, since one control device can operate as both a master and slave control device, other control devices connected serially through the interface can be connected to the main control device. Alternatively, it can be used as a monitor device or debugging machine for checking the operation of a control device connected thereto. Furthermore, since the control logic for controlling the transfer of interface signals and switching between the main and slave control functions is simple, a control device having both the master and slave control functions can be realized with a small amount of hardware.

〔Effect of the invention〕

As explained above, the control device according to the present invention.

Since it can be used as a monitor device or a debugging tool for checking the operation between control devices serially connected through an interface, it becomes easy to check the operation of the control devices, make adjustments, etc.

[Brief explanation of drawings]

Figure 1 is a diagram showing the connection state between the main control device and the slave control device, Figure 2 is a functional block diagram showing the logical structure of the master and slave control functions, and Figure 3 is an example of interface switching logic. Circuit diagram, Fig. 4 is a circuit diagram showing an example of control block switching logic, Fig. 5 is a timing diagram showing the execution cycle of the main control block and slave control block, and Fig. 6 is the execution cycle of the main control block and slave control block. It is a figure which shows an order. ■... Main control device, 2-1 to 2-n... Slave control device, 11... Interface switching logic, 12... Control block switching logic, 13... Main control logic block,
14...Slave control logic block, 15.17...Register group/dedicated memory, 16...Timing generation circuit. Figure 2 Dimensions A1 Figure 3

Claims (1)

[Claims] (1) A control device that is serially connected to another control device on an interface, and includes a logic section that functions as a main control device, a logic section that functions as a slave control device that is controlled by the main control device, and a logic section that functions as a slave control device under control of the main control device. What is claimed is: 1. A control device comprising: a switching logic section for switching between two ring portions, and capable of operating as either a main control device or a slave control device.