JP3473744B2 - IEEE 1394 inspection test apparatus, IEEE 1394 inspection test method, and IEEE 1394 inspection test system - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to IEEE 1394.
The present invention relates to an IEEE 1394 inspection test device and an IEEE 1394 inspection test method for inspecting a bus compatible device.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for automatically inspecting the protocol of a device compatible with the IEEE 1394 high-speed serial bus, there is one disclosed in Japanese Patent Laid-Open No. 10-308797.

FIG. 13 shows the conventional I disclosed in the above publication.
It is a system diagram which shows an EEE1394 inspection test apparatus.
This system is a PC main body 20 of the PC system 2001.
02 and IEEE 1394 bus compatible device 2 to be inspected
005 and 005 are connected by a 1394 serial bus 2006. Then, by inserting the IEEE 394 interface board 2004 into the PCI slot of the PC main body 2002, creating an application for protocol inspection in the PC main body 2002, and transmitting and receiving asynchronous packets, it is possible to inspect the protocol of the IEEE 1394 bus compatible device 2005. This is an realized example.

The file memory in the main body of a personal computer (PC) 2002 has an internal IEEE 1394 to be inspected.
A series of transmission packets necessary for checking whether the bus compatible device 2005 satisfies the 1394 protocol and the corresponding reception asynchronous packets, AC
K code, message code prompting the desired message,
A wait code that puts a waiting time at a desired place, a bus reset code that can cause a bus reset so as to be root / non-root at a desired place, and the like are stored as a data file. Then, when the inspection application is started up and processing is started, this data file is opened, and thereafter, various packet transmissions, ACK receptions, error detections, etc. are automatically executed.

[0005]

However, the above-mentioned conventional technique has the following problems. (1) IEEE 1394 bus compatible device 2 to be inspected
When 005 has a plurality of IEEE 1394 bus ports, it is necessary to inspect each of the IEEE 1394 bus port routes while performing work such as connection change of the 1394 cable by an inspector for the IEEE 1394 bus port, There was a problem. The reason is,
IEEE139 included in a device compatible with the IEEE1394 bus
This is because the IEEE 1394 inspection / test apparatus does not have more IEEE 1394 bus ports than 4 bus ports. (2) When the IEEE 1394 bus compatible device to be inspected has a plurality of IEEE 1394 bus ports, all the IEEE 1 of the IEEE 1394 bus compatible devices are simultaneously tested.
Regarding the load of transmitting and receiving 1394 packets on each path of the 394 bus port, it is impossible to guarantee certain allowance and performance. The reason is the same as the reason for the first problem. (3) It is impossible to inspect by transmitting an asynchronous request packet and an isochronous packet from an IEEE 1394 bus compatible device to be inspected. The reason is that the asynchronous request packet and the isochronous packet are transmitted from the IEEE 1394 test / test device, and the IEEE 1394 bus compatible device can only receive the packet.

In view of the above conventional problems, the present invention is IEEE
When an E1394 bus compatible device has a plurality of IEEE1394 bus ports, an IEEE1394 bus compatible device and an IEEE1394 bus compatible device can be inspected by connecting the IEEE1394 bus compatible device and the IEEE1394 bus cable in each path of all the ports. It is an object to provide a test apparatus and an IEEE 1394 inspection test method.

[0007]

In order to achieve the above object, in the IEEE 1394 inspection / test apparatus according to the invention described in claim 1, a plurality of first means for carrying out the physical layer of IEEE 1394 and the link layer of IEEE 1394 are provided. A plurality of second means, a plurality of bus ports respectively corresponding to the first and second means, connectable to a plurality of IEEE 1394 bus ports of an IEEE 1394 bus compatible device to be inspected, and IEEE 1394 having an inspection controller for collectively controlling the first means
In the inspection test apparatus, the inspection controller checks the connection status of the IEEE 1394 bus compatible device in the path of each bus port, and in the bus port path corresponding to the first means according to the connection status. After transmitting the inspection start request packet, all the routes from the IEEE 1394 bus compatible device to the IEEE 1394 bus port are changed.
When the test start approval packet that is recognized as a connection is received,
The IEEE 1 by the IEEE 1394 packet transmission / reception
It is characterized in that it is configured to inspect a 394 bus compatible device.

The IEEE 139 according to the invention of claim 2
4 Inspection The test method corresponds to a plurality of first means that bears the physical layer of IEEE 1394, a plurality of second means that bears the link layer of IEEE 1394, and each of the first and second means, and IEEE 1394 bus device capable of connecting to a plurality of IEEE 1394 bus ports, respectively.
Using an inspection / testing apparatus, the connection status of the IEEE 1394 bus compatible device is checked through the path of each bus port, and an inspection start request packet is transmitted through the bus port path corresponding to the first means according to the connection status. Then, from the IEEE 1394 bus compatible device, the IEEE 13
When the inspection start acknowledge packet in which all the routes of the 94 bus ports are recognized as being connected is received, the IEEE 1394 bus compatible device is inspected by transmitting and receiving the IEEE 1394 packet.

IEEE 139 according to the invention of claim 3
In a four inspection test system, the IEEE 13 according to claim 1.
An IEEE equipped with a 94 inspection test device and an IEEE 1394 bus compatible device connected to the IEEE 1394 inspection test device through a plurality of IEEE 1394 bus ports.
1394 inspection test system, wherein the IEEE 13
An IEEE 1394 packet is transmitted from the 94 bus compatible device side to the IEEE 1394 inspection / test device,
It is characterized in that it is configured to inspect the device compatible with the IEEE 1394 bus.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] FIG. 1 is a block diagram showing a configuration of a system to which an IEEE 1394 inspection test apparatus according to a first embodiment of the present invention is applied. This system is based on IEEE
It is composed of a 1394 inspection tester 1, an IEEE 1394 bus compatible device 2, and a 1394 cable 3i (1≤i≤M).

The IEEE 1394 inspection / test device 1 includes a port 11j and a PHY 12j which is a physical layer of the IEEE 1394.
And LINK13j which is responsible for the link layer of IEEE1394
(1 ≦ j ≦ N, M ≦ N), the inspection controller 14, and the inspection start switch 15. The combination of the port 11j, the PHY 12j, and the LINK 13j has a function of mutually passing N sets of information related to 1394 packets. The inspection controller 14 is
It is connected to each of the LINKs 13j and makes it possible to control each of the LINKs 13j independently, and the 1394 cable 3i is provided for each route of the port 11i corresponding to the LINK 13i.
Recognizes the IEEE 1394 bus compatible device 2 connected via the 1394 cable 3i, and recognizes the IEEE 139 via the 1394 cable 3i.
Inspection is performed by transmitting and receiving 1394 packets with the 4-bus compatible device 2. Further, the inspection controller 14 transmits a 1394 packet (hereinafter, referred to as an inspection start request packet) meaning an inspection start to the IEEE 1394 bus compatible device 2 at the start of the inspection. When the inspection start switch 15 is pressed, the inspection controller 14 outputs a signal that means the start of inspection.
It has a mechanism to be transmitted to.

The IEEE 1394 bus compatible device 2 has 13
A combination of PHY22 and LINK23 for mutually passing a set of information related to 94 packets, and PHY
The port 21 i (1 ≦ i ≦ M) connected to the port 22 and the controller 24 to be inspected. The controller 24 to be inspected is connected to the LINK 23 and is capable of controlling the LINK 23. In the application layer in the same layer as the inspection controller 14, the inspection controller 24 is synchronized with the inspection controller 14 and inspected by 1394 packet transmission / reception via the 1394 cable 3i. do. Furthermore, the controller under test 2
When recognizing the inspection start request packet from the IEEE 1394 inspection / testing device 1, 4 recognizes the start of inspection to the IEEE 1394 inspection / testing device 1 if the connection of the IEEE 1394 inspection / testing device 1 is recognized on all the ports 21i. A 1394 packet that means (hereinafter, referred to as an inspection start approval packet) is transmitted. If the connection of the IEEE 1394 inspection / testing device 1 is not recognized through any route of the port 21i, the 1394 packet (hereinafter, referred to as inspection start denying packet) meaning rejection of inspection start is transmitted to the IEEE 1394 inspection / tester 1.

At the same time, the 1394 cable 3i is
Port 11i of the E1394 inspection tester 1 and IEEE1
Used to connect the port 21i of the 394 bus compatible device 2.

FIG. 2 is a block diagram showing an example in which the IEEE 1394 bus compatible device 2 shown in FIG. 1 is separated into a controller 24 to be inspected and an IEEE 1394 bus compatible optional device 4 composed of other parts. Is.
In this case, the optional device 4 supporting the IEEE 1394 bus is to be inspected, and the optional device 4 supporting the IEEE 1394 bus and the controller 24 to be inspected whose operation is guaranteed.
The configuration in which is connected is equivalent to that of the IEEE 1394 bus compatible device 2.

FIG. 3 shows the inspection controller 1 shown in FIG.
It is a block diagram of FIG. As shown in the figure, the inspection controller 14 sends to the CPU 141, the program memory 142 storing software for connection recognition and 1394 packet transmission / reception inspection, and 139 to the LINK 13j.
Stores the header part and data part of 4 packets,
Conversely, a work memory 143 that stores 1394 packets received from the LINK 13j, and a connection flag memory 1 that stores the presence / absence of connection recognition of the IEEE 1394 bus compatible device 2 for each route of the port 11j corresponding to the LINK 13j.
A recording medium 145, which is composed of 44 and records software for performing connection recognition, 1394 packet transmission / reception inspection, and the like.
From the above, the software operates by being incorporated in the program memory 142.

FIG. 4 is a block diagram of the inspected controller 24 shown in FIG. As shown in the figure, the controller 24 to be inspected transmits to the CPU 241, a program memory 242 storing software for connection recognition and 1394 packet transmission / reception inspection, and the LINK 23.
A recording medium 244 configured to store software for performing connection recognition, 1394 packet transmission / reception inspection, and the like, and a work memory 243 that stores a header part and a data part of 94 packets, and conversely stores 1394 packets received from the LINK 23. From the above, the software operates by being incorporated in the program memory 242.

FIG. 5 is a block diagram showing the connection flag memory 144 of FIG. The connection flag 144j is LINK1.
IEEE139 on the route of port 11j corresponding to 3j
Used to determine whether or not the 4-bus compatible device 2 is connected. Therefore, in the case of the configuration diagram of FIG. 1, the connection flag 144j (1
≦ j ≦ M) stores a flag indicating that connection is recognized, and connection flag 144j (M + 1 ≦ j ≦ N) stores a flag indicating that connection is not recognized.

FIG. 6 shows the inspection controller 1 shown in FIG.
FIG. 4 is a configuration diagram of an inspection start request packet 5 which is transmitted when 4 starts inspection. The inspection start request packet 5 is IEEE13
It corresponds to a write request packet in the 94 standard, the transaction code 51 means 0 (HEX) which means a write request packet, and the retry code 52 is 01 (B
IN), the transfer destination ID 53 is the ID of the IEEE 1394 bus compatible device 2, and the transfer destination offset 54 is IEEE 1394.
Unique FFFFE0000000 with bus compatible device 2
(HEX), the transfer source ID 55 is the ID of the IEEE 1394 inspection / testing device 1, and the data 56 is 000.
00000 (HEX), and other areas are reserved. Further, the inspection start acknowledge packet transmitted by the controller 24 to be inspected when the inspection start is acknowledged is that the data 56 is changed from the inspection start request packet 5 to 00000001 (HEX) meaning that the inspection start is acknowledged. To do. Further, in the inspection start rejection packet transmitted by the controller 24 to be inspected when the inspection start is rejected, the data 56 is changed from the inspection start request packet 5 to 00000002 (HEX) which means rejection of the inspection start. .

Next, before describing the detailed operation of this embodiment, the features of this embodiment will be briefly described. As described above, in FIG. 1, the IEEE 1394 bus compatible device 2 having the port 21i (1 ≦ i ≦ M) is the inspection target. I
The EEE1394 inspection tester 1 also has a port 11j (1 ≦ j ≦
N, M ≦ N), but port 11j is IEEE13
PHY 12j which is responsible for the physical layer of 94 and LI which is responsible for the link layer
Corresponds to NK13j. Therefore, at the same time, port 1
1i and port 21i M routes, each IEEE
An IEEE 1394 inspection / testing device 1 and an IEEE 1394 bus cable (hereinafter referred to as 1394 cable 3i) are used.
It is possible to connect an E1394 bus compatible device 2. For example, the port 11 of the IEEE 1394 inspection / test device 1
j is the port 21i of the IEEE 1394 bus compatible device 2
, PHY22 and LINK23, one set of P
As for HY and LINK, the IEEE 1394 inspection / testing device 1 and the I / I tester 1 and I can be simultaneously connected through M routes as described above.
It is impossible to connect to the EEE1394 bus compatible device 2.

The IEEE 1394 inspection tester 1 has an inspection start switch 15 which starts an inspection when pressed. I
In the inspection of the EEE1394 bus compatible device 2, naturally,
Although it is necessary to send and receive 1394 packets through each route of the port 21i, according to the present invention, the inspector can use one of the M routes at the same time as described above, prior to the inspection.
The IEEE 1394 inspection tester 1 and the IEEE 1394 bus compatible device 2 are connected by the 394 cable 3i, and after the power is turned on, the inspection is started, that is, the inspection start switch 15
You can press.

Further, the inspection controller 14 is a LINK.
Control such as a 1394 packet transmission request is collectively performed for each of the 13j. The IEEE 1394 bus-compatible device 2 receives the IEEE 139 no matter what timing the 1394 packet is received on each path of the port 21i.
4 Must operate according to the standard. In the present invention,
From this viewpoint, in the inspection of the IEEE 1394 bus compatible device 2, the inspection controller 14 collectively performs the LINK 13
LINK13i taking advantage of the ability to control each j
It is possible to adjust and inspect the timing of the transmission request of the 1394 packet for each of the above, that is, the timing of the transmission of the 1394 packet to the 1394 cable 3i.

Next, the overall operation of this embodiment will be described in detail with reference to FIGS. 1, 2, 5, 7, and 8. As a preparation for the inspection, first, the inspection operator of the IEEE 1394 bus compatible device 2 makes the M 1394 cables 3i.
(1 ≦ i ≦ M) is prepared, and at the same time, each of the ports 21i of the IEEE 1394 bus compatible device 2 is set to IEEE 1394.
Connect to any of the ports 11j (1 ≦ j ≦ N) of the inspection tester 1 and turn on the power. In FIG. 1, for convenience, IEEE1
A port 11i (1 ≦ i ≦ M) of the 394 inspection tester 1,
Port 21i (1 ≦
i ≦ M).

Next, the inspection operator starts the inspection, that is, presses the inspection start switch 15. Inspection start switch 1
When 5 is pressed, the inspection controller 14 which has received the signal generated in response to the pressing starts the inspection. In addition, in FIG. 2, before the work such as power-on, the inspection worker
It is necessary to connect the E1394 bus-compatible optional device 4 and the controller under test 24 whose operation is guaranteed.

The inspection by transmitting / receiving the 1394 packet will be described below with reference to the flowcharts of the inspection controller 14 shown in FIG. 7 and the inspected controller 24 shown in FIG. First, the inspection controller 14 uses the port 11j (1
Whether or not the IEEE 1394 bus compatible device 2 is connected to the path of ≦ j ≦ N), LINK 13j (1 ≦ j ≦
N) is accessed in a fixed order, and a flag for distinguishing whether or not the connection is recognized is stored in the connection flag 144j according to the connection status (step S1). The inspection controller 14 is
LINK of any of the connection flags 144j with connection recognition
The inspection start request packet 5 is transmitted through the route of the port 11j corresponding to 13j (step S2).

When the IEEE 1394 bus compatible device 2 receives the inspection start request packet 5 transmitted through the route of the port 11j through the route of the port 21j, the inspected controller 24 recognizes the packet and starts the inspection. First, the inspected controller 24 determines that all the ports 21i
IEEE 1394 inspection tester 1 on the path (1 ≦ i ≦ M)
If the connection is recognized, the inspection start acknowledgment packet is transmitted through the route of the port 21j, and the inspection controller 1
It becomes possible to inspect by transmitting / receiving 1394 packet in synchronism with 4 (steps S11, S12, S13).

IEEE1 on any route of port 21i
If the connection of the 394 inspection tester 1 is not recognized, the inspection start reject packet is transmitted through the route of the port 21j, and the inspection is stopped here (steps S12 and S14). The inspection controller 14 uses the route of the port 11j and the IEEE1
It waits until the inspection start approval packet or the inspection start rejection packet is received from the 394 bus compatible device 2. If the inspection start rejection packet is received, the inspection is stopped here (step S3). When the inspection start acknowledge packet is received, the tune is transmitted to the inspected controller 24 which is already inspected by the 1394 packet transmission / reception,
Inspection by transmitting / receiving 94 packets becomes possible (step S4).

In the inspection by the 1394 packet transmission / reception, the inspection controller 14 concurrently accesses all of the LINK 13j corresponding to the connection flag 144j with connection recognition, and the port 11 corresponding to the LINK 13j.
Various asynchronous request packets and isochronous packets are transmitted through the route j, reception of asynchronous response packets to the asynchronous request packets and their validity check, and various asynchronous request packets and isochronous packets from the inspected controller 24 are received. Also, the validity check and the transmission of an asynchronous response packet in response to the asynchronous request packet are performed (step S5).

In parallel with this, the controller under test 24
Accesses LINK23, and all ports 21i
Various asynchronous request packets and isochronous packets are transmitted along the path (1 ≦ i ≦ M), asynchronous response packets for the asynchronous request packets are received and their validity is checked, and various asynchronous request packets are received from the inspection controller 14. Then, the isochronous packet is received and its validity is checked, and the asynchronous response packet is transmitted in response to the asynchronous request packet (step S15).

Here, in step S5, the inspection controller 14 adjusts the timing of the transmission request of the 1394 packet to each of the LINK 13j corresponding to the connection flag 144j with the connection recognition, and the IEEE1394
The bus compatible device 2 uses 1394 on each path of the port 21i.
Load for receiving packets, and controller under test 2
4, it is possible to adjust the timing of the 1394 packet transmission request to the LINK 23, and to guarantee a certain allowance and performance with respect to the load of transmitting the 1394 packet from each route of the port 21i.

Next, the advantages of this embodiment will be described. (1) When the IEEE 1394 bus compatible device to be inspected has a plurality of IEEE 1394 bus ports, the inspection worker does not have to change the connection of the 1394 cable to the IEEE 1394 bus port in the middle of the inspection. It is possible to inspect in each path of all IEEE 1394 bus ports. The reason is IE
A plurality of IEEE 139 included in the IEEE 1394 inspection tester
Each of the 4 bus ports has its own PHY and LINK
Support all IEEE 1394 bus ports and all IEEE 1394 bus ports of devices compatible with IEEE 1394 bus at the same time.
It is possible to connect with a 94 bus cable, and under that condition, the inspection operator depresses the inspection start switch provided in the IEEE 1394 inspection tester to
All IEEE 1394 devices compatible with the IEEE 1394 bus
This is because inspection can be performed via each route of the bus port. (2) The second effect is the inspection target IEEE 1394.
When the bus-compatible device has a plurality of IEEE 1394 bus ports, at the same time, the number of 13 in each path of all the IEEE 1394 bus ports of the IEEE 1394 bus-compatible device
Regarding the load of transmitting / receiving 94 packets, it is possible to guarantee a certain tolerance and performance. The reason is I
The IEEE 1394 inspection / testing device can adjust the timing of transmitting a 1394 packet on each path of all the IEEE 1394 bus ports of the IEEE 1394 bus compatible device, and the IEEE 1394 bus compatible device can adjust the timing of transmitting a 1394 packet on the path. This is possible.

[Second Embodiment] FIG. 9 is a block diagram showing the configuration of a system to which the IEEE 1394 inspection test apparatus according to the second embodiment of the present invention is applied. The system according to the present embodiment includes an IEEE 1394 inspection tester 1, a plurality of IEEE 1394 bus compatible devices 2h (1 ≦ h ≦ L),
1394 cable 3hi (1≤h≤L, 1≤i≤M). The IEEE 1394 inspection tester 1 is shown in FIG.
The inspection controller 14 is changed to the inspection controller 16 for the IEEE 1394 inspection tester 1 in the first embodiment shown in FIG.
It is possible to connect L 4-bus compatible devices 2. The inspection controller 16 uses the LINK 13j (1 ≦ j ≦ N,
(L × M) ≦ N), enabling each of the LINKs 13j to be controlled independently,
I connected via the 1394 cable 3hi for each route of the port 11k corresponding to (k = (h−1) × M + i)
Recognizing the IEEE 1394 bus compatible device 2h, the IEEE 1394 bus compatible device 2 via the 1394 cable 3hi
Check by sending and receiving 1394 packets with h. Furthermore, the inspection controller 14 transmits a 1394 packet (hereinafter, referred to as an inspection start request packet) meaning an inspection start to the IEEE 1394 bus compatible device 2h at the start of inspection of each of the IEEE 1394 bus compatible devices 2h. It should be noted that each of the IEEE 1394 bus compatible devices 2h is shown in FIG.
Since it is the same as the IEEE 1394 bus compatible device 2 shown in FIG. At the same time, the 1394 cable 3hi is connected to the port 11k of the IEEE 1394 inspection / test device 1,
It is used to connect the port 21hi of the IEEE 1394 bus compatible device 2h.

FIG. 10 is a block diagram showing the inspection controller 16 of this embodiment. As shown in the figure, the inspection controller 16 connects the CPU 141, the program memory 142, and the work memory 143 shown in FIG.
It is configured by adding a memory 164, connection recognition and 1394
The software operates from the recording medium 165, which records software for packet transmission / reception inspection, etc., in the program memory 142.

FIG. 11 is a block diagram of the connection GUID memory 164 shown in FIG. The connection GUID 164j is
Initialized by the inspection controller 16 and then L
In the route of port 11j corresponding to INK13j, IEEE
The GUID of the IEEE 1394 bus compatible device 2h is stored when the connection of the E1394 bus compatible device 2h is recognized. Therefore, in the case of the configuration shown in FIG. 9, the connection GUI
D164j (j = k = (h−1) × M + i) is IEEE
The GUID of the 1394 bus compatible device 2h is stored, and the connection GUID 164j (L × M + 1 ≦ j ≦ N) does not have the GUID stored and remains the initialized value. In addition, GU
The ID is defined in the IEEE 1394 standard, and the IEEE1
These are eigenvalues of each 394 compatible device 2h.

Next, the overall operation of this embodiment will be described in detail with reference to FIGS. 9, 11 and 12. To prepare for the inspection, first, the IEEE 1394 bus compatible device 2
The inspection operator of h (1 ≦ h ≦ L) has (L × M) 13
A 94 cable 3hi (1 ≦ h ≦ L, 1 ≦ i ≦ M) is prepared, and at the same time, each port 21hi of the IEEE 1394 bus compatible device 2h is connected to the port 11j (1 ≦ j ≦ N, (L XM) ≤ N) and connect the power. In FIG. 9, for convenience, IEEE1
394 inspection tester 1 port 11k (k = (h-1) ×
M + i) and the port 21hi (1 ≦ i ≦ M) of the IEEE 1394 bus compatible device 2h are connected.

Next, the inspection operator starts the inspection, that is, presses the inspection start switch 15. Inspection start switch 15
When is pressed, the inspection controller 16 which receives the signal generated in response to the pressing starts the inspection.

The inspection by transmitting / receiving the 1394 packet will be described below with reference to the flowchart of the inspection controller 16 shown in FIG. The controller under inspection 24h
Since the processing contents of each are the same as the contents shown in FIG.
The description and the flowchart are omitted. First, the inspection controller 16 initializes the connected GUID memory 164 (step S21). The inspection controller 16 determines whether the IEEE 1394 bus-compatible device is connected to the path of the port 11j (1 ≦ j ≦ N) by using the LINK 13
j (1 ≦ j ≦ N) is accessed in a fixed order, and IEEE
When the connection of the E1394 bus compatible device 2h is recognized, the GUID of the IEEE1394 bus compatible device 2h is stored in the connection GUID 164j (step S22). The inspection controller 16 is an IEEE 1394 bus compatible device 2h.
IEEE1 by accessing the LINK 13j corresponding to the connection GUID 164j that stores the GUID of
The same processing as steps S2 to S5 of the first embodiment shown in FIG. 7 is performed on the 394 bus compatible device 2h. The inspection controller 16 sequentially performs the processing of steps S2 to S5 for each of the IEEE 1394 bus compatible devices 2h (1 ≦ h
≦ L) (steps S23 to S26).

[0037]

As described in detail above, according to the present invention,
The following effects are achieved. (1) Even if the IEEE 1394 bus compatible device to be inspected has a plurality of IEEE 1394 bus ports,
It is possible to perform the inspection on each path of all the IEEE 1394 bus ports without the inspection operator having to change the connection of the 1394 cable to the IEEE 1394 bus ports in the middle of the inspection. (2) Even when the IEEE 1394 bus compatible device to be inspected has a plurality of IEEE 1394 bus ports,
At the same time, all of the IEEE 1394 bus compatible devices
It is possible to guarantee a certain allowance and performance with respect to the load of transmitting and receiving 1394 packets on each path of the 1394 bus port. (3) An inspection can be performed by transmitting an IEEE 1394 packet (for example, an asynchronous request packet and an isochronous packet) from an IEEE 1394 bus compatible device to be inspected.

[Brief description of drawings]

FIG. 1 is an IEEE 139 according to a first embodiment of the present invention.
It is a block diagram which shows the structure of the system to which the 4-inspection test device is applied.

FIG. 2 is a configuration diagram showing a modified example of the IEEE 1394 bus compatible device 2 shown in FIG.

FIG. 3 is a configuration diagram of an inspection controller 14 shown in FIG.

FIG. 4 is a configuration diagram of a controller to be inspected 24 shown in FIG.

5 is a configuration diagram showing a connection flag memory 144 of FIG.

FIG. 6 is a configuration diagram of an inspection start request packet 5 transmitted by the inspection controller 14 shown in FIG. 1 at the start of inspection.

FIG. 7 is a flowchart showing an operation of the inspection controller 14 according to the first embodiment.

FIG. 8 is a controller 24 to be inspected according to the first embodiment.
3 is a flowchart showing the operation of FIG.

FIG. 9 is an IEEE 139 according to a second embodiment of the present invention.
It is a block diagram which shows the structure of the system to which the 4-inspection test device is applied.

FIG. 10 is a configuration diagram showing an inspection controller 16 of a second embodiment.

11 is a connection GUID memory 164 shown in FIG.
It is a block diagram of.

FIG. 12 is an inspection controller 14 according to the second embodiment.
3 is a flowchart showing the operation of FIG.

FIG. 13 is a system diagram showing a conventional IEEE 1394 inspection test device.

[Explanation of symbols]

1 IEEE 1394 inspection tester 2 Devices compatible with IEEE 1394 bus 3i (1 ≤ i ≤ M) 1394 cable 11j (1≤j≤N, M≤N) ports 12j (1 ≦ j ≦ N, M ≦ N) PHY 13j (1 ≦ j ≦ N, M ≦ N) LINK 14, 16 Inspection controller 15 Inspection start switch

Claims (3)

(57) [Claims] 1. A plurality of first means for carrying a physical layer of IEEE 1394, a plurality of second means for carrying a link layer of IEEE 1394, and a plurality of second means respectively corresponding to the first and second means, which are to be inspected. An IEEE 139 that includes a plurality of bus ports that can be connected to a plurality of IEEE 1394 bus ports of a certain IEEE 1394 bus compatible device, and an inspection controller that collectively controls the first means.
4 inspection test device, wherein the inspection controller is a path of each of the bus ports,
After checking the connection status of the IEEE 1394 bus compatible device and transmitting an inspection start request packet through the bus port route corresponding to the first means according to the connection status,
From the IEEE 1394 bus compatible device to the IEEE 1
The IEEE 1394 bus-compatible device is inspected by transmitting and receiving the IEEE 1394 packet when the inspection start approval packet in which all the routes of the 394 bus ports are connected and recognized is received.
94 inspection test equipment. 2. A plurality of first means for carrying a physical layer of IEEE1394, a plurality of second means for carrying a link layer of IEEE1394, and a plurality of second means respectively corresponding to the first and second means, which are to be inspected. An IEEE 1394 inspection / testing apparatus having a plurality of bus ports each connectable to a plurality of IEEE 1394 bus ports of a certain IEEE 1394 bus compatible device is used to check the connection status of the IEEE 1394 bus compatible device in the path of each bus port. , After transmitting the inspection start request packet through the bus port path corresponding to the first means according to the connection status, the IEEE 1394 bus compatible device transmits all the IEEE 1394 bus ports
The IEEE1394 packet is transmitted / received when an inspection start approval packet in which the connection is recognized is received.
An IEEE 1394 inspection test method characterized by being configured to execute an inspection of an E1394 bus compatible device. 3. The IEEE 1394 inspection / test apparatus according to claim 1, and the IEEE 1394 inspection / test apparatus connected to the IEEE 1394 inspection / test apparatus via a plurality of IEEE 1394 bus ports.
An IEEE 1394 inspection test system including an E1394 bus compatible device, wherein the IEEE 1394 bus compatible device is connected to the IEEE
An IEEE 1394 inspection test apparatus is configured to transmit an IEEE 1394 packet to inspect an apparatus compatible with the IEEE 1394 bus.
Inspection test system.