JP2928128B2 - CPU peripheral device simulation method and method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for simulating a CPU peripheral device of a target hardware using target hardware simulation means prepared on a host computer, and more particularly, to a method for simulating a CPU peripheral device outside or inside the CPU peripheral device. The present invention relates to a method for simulating a response operation of a CPU peripheral device to an occurring event.

[0002]

2. Description of the Related Art A conventional simulation method of a CPU peripheral device uses a simulation procedure for simulating a response operation of the CPU peripheral device to an event occurring outside or inside the CPU peripheral device. When an event occurs, a simulation is performed by executing a simulation procedure corresponding to the event.

[0003]

The conventional CPU described above.
In the peripheral device simulation method, if the response operation differs depending on the state of the CPU peripheral device or the state transition, it is necessary to prepare means for simulating the state and the state transition in the simulation procedure. And the productivity of the simulation program is reduced.

According to the present invention, a simulation procedure of a response operation to an event occurring outside or inside a CPU peripheral device can be made to correspond to the state of the CPU peripheral device.
It is not necessary to prepare simulation means for states and state transitions in the simulation procedure, and the object is to prevent the simulation procedure from becoming complicated.

[0005]

According to a first aspect of the present invention, there is provided a state storage unit for registering a state of a CPU peripheral device to be simulated, and a simulation procedure of a response operation to an event occurring outside or inside the CPU peripheral device. If the response action depends on the state, a first state specific to the state
A device-specific data generating means for registering in the device-specific data storage unit as a simulation procedure of the above, or as a second simulation procedure that does not depend on the state when the response operation does not depend on the state, Registered in the status storage unit when the event occurred
If a simulation procedure of the event for a state is registered in the device-specific data storage unit, the first simulation procedure registered corresponding to the state is executed, and the event is executed when the event occurs. Of the event with respect to the state registered in the state storage unit when
When the simulation procedure is not registered in the device-specific data storage unit and the simulation procedure executing means for executing the second simulation procedure, said state after execution of the first simulation process or the second simulation procedure When a transition is made, a state transition unit for updating and registering the state registered in the state storage unit is provided.

According to a second aspect of the present invention, a state storage unit for registering a state of a CPU peripheral device to be simulated and a device-specific data storage unit for storing a relationship between the state and a simulation procedure are prepared in advance. When the response operation depends on the state, a simulation procedure of a response operation to an event occurring outside or inside the peripheral device is used as a first simulation procedure specific to the state, and the response operation does not depend on the state. In this case, the state is registered in the device-specific data storage unit as a second simulation procedure that does not depend on the state, and when the event occurs, the event is stored in the state storage unit when the event occurs . when the simulation procedure is registered in the device-specific data storage unit is registered corresponding to the condition Said event over states the first run the simulation procedure, said event when said event occurs is registered in the state storage unit of time that occurred
If the simulation procedure is not registered in the device-specific data storage unit, the second simulation procedure is executed. If the state changes after the execution of the first simulation procedure or the second simulation procedure, The status registered in the status storage unit is updated and registered.

[0007]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a flowchart showing an example of the simulation operation in the present invention.

In FIG. 1, simulation information 1 specific to a CPU peripheral device is information specific to a device to be simulated, and includes state information 11 listing names of states necessary for a simulation operation of the peripheral device, and external information of the peripheral device. And simulation procedure information 12 which describes a simulation procedure of a response operation to each event that occurs inside as a unique procedure for each state of the state information 11 or is described as a state-independent procedure.

The simulator 2 of the CPU peripheral device can change various data by changing data in the device-specific data storage section 7.
A simulator capable of simulating a PU peripheral device, and a device-specific data generating means 3 for generating device-specific simulation data from the simulation information 1
And a device-specific data storage unit 7 for storing device-specific data
Simulation procedure execution means 4 for executing a simulation procedure in the storage unit 7 when an event occurs;
It is composed of a state transition unit 5 that is called by the execution unit 4 and causes a state transition, and a state storage unit 6 that stores the current state.

The device-specific data generating means 3 stores the status information 1
1, a state registration unit 31 that generates a state management table 71 having an entry corresponding to each state, a simulation procedure that can be executed by the execution unit 4, and a simulation procedure group 72 for each state and a state-independent simulation. It comprises a simulation procedure registration means 32 for generating a procedure group 73. The simulation procedure registration means 32 adds information to the state management table 71 so that each simulation procedure of the generated simulation procedure group 72 for each state can be referred to from the state management table 71.

Next, referring to FIG. 1 and FIG.
The operation of the simulator 2 of the peripheral device will be described. The device-specific data generating means 3 generates device-specific data from the simulation information 1 specific to the CPU peripheral device in the device-specific data storage unit 7 (201). The generation method in this case is as described above. Next, the simulator 2 sets an initial state in the state storage unit 6 (202), and waits for occurrence of an event that requires simulation of a response operation (2).
03, 204). When an event occurs, the simulation procedure execution means 4 determines from the information of the entry in the state management table 71 corresponding to the state set in the state storage unit the current state in the simulation procedure group 72 for each state. The registered simulation procedure is searched (205). As a result of the search, when there is a simulation procedure of the response operation to the occurred event (206), the simulation procedure is executed (208). If not (206), a simulation procedure of a response operation to an event generated from the state-independent simulation procedure group 73 is searched (20).
7) Execute (208). If the executed simulation procedure specifies a state transition (209),
A new state is set in the state storage unit 6 (210). When the simulation procedure of the response operation to the generated event has been executed in this way, the occurrence of the event is waited again (203). By repeating this, the simulator 3
A simulation of the U peripheral device is performed.

[0013]

As described above, the CP according to the present invention is used.
In the simulation method of the U peripheral device, the state of the CPU peripheral device can be registered, and a simulation procedure of a response operation of an event occurring inside or outside the CPU peripheral device can be registered for each state. It is not necessary to prepare a simulation means, and it is sufficient to prepare a simulation procedure based on states and state transitions. Therefore, the contents of the simulation procedures and the relationships between the simulation procedures are simplified, and the productivity of the simulation program is improved. It has the effect of.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a processing flowchart showing one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Simulation information specific to CPU peripheral device 2 Simulator of CPU peripheral device 3 Device-specific data generation means 4 Simulation procedure execution means 5 State transition means 6 State storage unit 7 Device-specific data storage unit 11 State information 12 Simulation procedure information 31 State registration means 32 Simulation procedure registration information 71 State management table 72 Simulation procedure group for each state 73 Simulation procedure group independent of state

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hideki Fukuoka 3-9-1, Kaigan, Minato-ku, Tokyo Inside NEC Information Systems Co., Ltd. (56) References JP-A-5-278613 (JP, A) Hei 2-151933 (JP, A) "Development of a simulation environment for embedded software development", Proceedings of the 12th Conference of the Software Society of Japan (1995), September 12-14, 1995, p. 45-48 (58) Field surveyed (Int.Cl. ⁶ , DB name) G06F 11/22-11/26 G06F 17/50

Claims (2)

(57) [Claims] 1. A state storage unit for registering a state of a CPU peripheral device to be simulated, and a simulation procedure of a response operation to an event occurring outside or inside the CPU peripheral device, wherein the response operation depends on the state. Means for generating device-specific data stored in the device-specific data storage unit as a first simulation procedure specific to the state, or as a second simulation procedure independent of the state when the response operation does not depend on the state; When the event occurs, a simulation of the event with respect to the state registered in the state storage unit when the event occurs
If the procedure is registered in the device-specific data storage unit, the first procedure registered in accordance with the state is registered.
The simulation procedure of the event is performed, and when the event occurs, the simulation procedure of the event for the state registered in the state storage unit when the event occurs is not registered in the device-specific data storage unit. The second
Simulation procedure executing means for executing the simulation procedure described above, and updating and registering the state registered in the state storage unit when the state transits after execution of the first simulation procedure or the second simulation procedure. A simulation method for a CPU peripheral device, comprising a state transition unit. 2. A state storage unit for registering a state of a CPU peripheral device to be simulated and a device-specific data storage unit for storing a relationship between the state and a simulation procedure are prepared in advance, outside or inside the CPU peripheral device. The simulation procedure of the response operation to the event occurring in the step is a first simulation procedure unique to the state when the response operation depends on the state, and depends on the state if the response operation does not depend on the state. Not registered in the device-specific data storage unit as a second simulation procedure, and when the event occurs, the event corresponding to the state registered in the state storage unit when the event occurs
When the simulation procedure of the elephant is registered in the device-specific data storage unit, the first simulation procedure registered corresponding to the state is executed, and when the event occurs, the event occurs. Simulation of the event for the state registered in the state storage unit at the time
If the procedure is not registered in the device-specific data storage unit, the second simulation procedure is executed. If the state transits after the execution of the first simulation procedure or the second simulation procedure, the state is changed. A method of simulating a CPU peripheral device, wherein the state registered in a storage unit is updated and registered.