JP2561366B2 - Data transfer device having function confirmation function - Google Patents

Description

The present invention relates to a data transfer device, and more particularly to a data transfer device having a function confirmation function.

[Conventional technology]

Regarding the function confirmation test method of the conventional data transfer device
This will be described with reference to the drawings.

In FIG. 4, the channel control device 2 in the data transfer device 41 connected to the central processing unit 40 and the storage device 1 is
A plurality of control channels 3 to 3N are connected, and peripheral devices 42 to 42N are connected to the respective control channels.

First, when an instruction to test the peripheral device 42 is sent from the central processing unit 40 to the channel control device 2, the channel control device 2 in the data transfer device 41 fetches a command relating to data transfer from the storage device 1 and the control channel 3 Test start via the command reception register 8 and signal line 43 in the peripheral device
Instruct 42.

The peripheral device 42 accordingly outputs the service code to the signal line 4
4. Send to the channel controller 2 via the command sending register 9 and the signal line 19.

The channel control device 2 discriminates the service code, and in order to perform data transfer, the signal line 18, the instruction reception register 8,
A data transfer start instruction is issued to the peripheral device 42 and the data transfer circuit 7 via the signal line 43 and the signal line 45. The peripheral device 42 accordingly sends data to the storage device 1 via the data transfer circuit 7, the data sending register 6, and the channel control device 2. The degree of coincidence between the data in the storage device 1 and the data in the peripheral device 42 sent in this way is manually checked to confirm the function of the data transfer device. The function confirmation of data transfer from the storage device 1 to the peripheral device 42 via the data reception register 5 and the data transfer circuit 7 is also the same.

[Problems to be Solved by the Invention]

Since the conventional data transfer device described above performs the function confirmation by connecting the peripheral devices, in order to confirm all the functions, a plurality of different peripheral devices corresponding to the respective functions are connected in order and operated. Since it has to be done, there is a drawback that the test is troublesome and complicated.

[Means for solving the problem]

A data transfer device comprising a plurality of control channels and a channel control device for controlling the control channels, wherein the control channel has a service code storage section for storing a series of service codes and a data area for holding test data. A loopback mode setting unit that has a transfer circuit and sets the control channel to the loopback mode by the control channel according to an instruction from the channel control device; and a command request from the service code storage unit when the setting mode is the loopback mode. When a service code is read out and sent to the channel controller, and a data read command or a data write command from the channel controller based on the command request service code is received, a data transfer instruction service code is sent from the service code storage unit. Service code sending means for sending out to the channel control device, then receiving a data transfer end command from the channel control device, taking out a data transfer end service code from the service code storage unit, and sending out to the channel control device. In the loopback mode, the test data previously input from the outside to the data transfer circuit and held in accordance with the data read command and the data transfer instruction command from the channel control device are sent to the channel control device, The test data sending means for ending the sending of the test data in response to the data transfer end command, and the test data sent from the channel control device in response to the data write command from the channel control device. Data transfer times Previously reserved received stored in the data area, and having a test data receiving means for terminating the reception of the data transfer the test data by receiving a termination command from the channel controller to.

〔Example〕

 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 block diagram showing the service code storage unit 13, and FIG. 3 shows an embodiment in the case of performing a function confirmation test of data transfer from the data transfer circuit 7 to the storage device 1 in the control channel 3. It is a flowchart.

The operation of the control channel 3 during operation is instructed by the channel control device 2 in FIG. 1 via the loopback mode flip-flop 12 and the signal line 25, and the selectors 10 and 11 connect the signal lines 43, 44 and 45, respectively. This is the case as described above in the section of the prior art using FIG.

Next, referring to the flow chart of FIG. 3, FIG.
The operation of the figure will be described.

When the test instruction is sent from the central processing unit 40 to the channel controller, the channel controller 2 reads the command from the storage device 1 and starts the test. First, a loopback instruction is issued from the channel controller 2 via the signal line 24 to the control channel 3
Is sent to the return mode flip-flop 12 (step 1 in FIG. 3), the return mode flip-flop 12 is set and a service code request is made to the service code storage unit 13 via the signal line 25.

The service code storage unit 13 is a memory address register 28.
The command request service code stored at the address indicated by is taken out from the service code memory 26 in which the service code is stored in advance to the service code register 27,
It is sent to the channel controller 2 via the signal line 23 and the instruction sending register 9 (step 2 in FIG. 3). At this time, the address indicated by the memory address register 28 is incremented by 1 by the counter 29. Further, the sectators 11 and 10 select the signal lines 20, 23 and 26 by the signal line 25, respectively.

The channel control device 2 executes a channel program by the service code sent, and sends a data read command relating to a data sending request to the control control channel 3 through the signal line 18 to transfer data to the storage device 1. (FIG. 3, step 3). The instruction receiving unit 8 receives the command and sends a drive signal to the data transfer circuit 7 and the service code storage unit 13 via the selector 10, the signal line 20, and the signal line 26. The data transfer circuit 7 prepares to transfer the data for the function confirmation test stored in advance according to the command signal, and the service code storage unit 13 stores the data transfer instruction service code which is the next service code indicated by the memory address register 28. From the service code memory 26 to the service code register 27, and the signal line 23, the selector 11 and the instruction sending register send it to the channel controller 2 via 9 (step 4 in FIG. 3). The channel control device 2 executes the channel program by the service code sent, and sends a data transfer instruction command relating to the start of data transfer to the control control channel 3 via the signal line 18 (step 5 in FIG. 3). The instruction receiving unit 8 receives a data transfer start instruction, and the selector 1
0, a drive signal is sent to the data transfer circuit 7 via the signal line 26, the data transfer circuit 7 starts data transfer accordingly, and the transfer data is sent to the storage device 1 via the data sending register 6 and the channel control device 2. Transferred to.

When the data transfer is completed, the data transfer end command is sent from the channel controller 2 to the control channel 3 via the signal line 18 (step 6 in FIG. 3). The signal due to the data transfer end command sent to the instruction receiving unit 8 is the selector 1
0, sent to the service code storage unit 13 via the signal line 20. The service code storage unit 13 takes out the data transfer end service code indicated by the memory address register 28, which has been updated as a confirmation signal to the data transfer end command, from the service code memory 26 to the service code register 27, and outputs the signal 23, the selector 11, and the instruction. It is sent to the channel controller 2 via the sending register 9 (step 7 in FIG. 3).

As described above, when the series of operations is completed, both the data transferred to the storage device 1 and the data for the function confirmation test stored in advance according to the data transfer circuit 7 are dumped and compared to confirm the function. To do.

The same applies to the function confirmation of data transfer from the storage device 1 to the data transfer circuit 7 via the channel control device 2 and the data reception register 5.

〔The invention's effect〕

As described above, according to the present invention, the service code is stored in the channel device, the command is sent from the channel control device under the initiative of this service code, and the preset data is stored in the control channel device in accordance with this command. It is necessary to connect the peripheral device and check the function by transferring the data to the device or, conversely, from the storage device to the control channel device to a data area that has been secured in advance and confirming with this transfer result. In addition, there is an effect that the labor and complexity of the test are eliminated.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing a service code storage unit 13, and FIG. 3 is a data transfer from a data transfer circuit 7 to a storage device 1 in a control channel 3. FIG. 4 is a flow chart showing an embodiment for carrying out the function confirmation test of FIG. 4, and FIG. 4 is a block diagram of a conventional data transfer device. 1 ... storage device, 2 ... channel control device, 3 to 3n ...
Control channel, 5 ... Data acceptance register, 6 ... Data transmission register, 7 ... Data transfer circuit, 8 ... Instruction acceptance section, 9 ... Instruction transmission register, 10 ... Selector, 11 ...
… Selector, 12 …… Fold-back mode flip-flop, 13
...... Service code storage, 26 ...... Service code memory, 27 ...... Service code register, 28 ...... Memory address register, 29 ...... Counter, 40 ...... Central processing unit,
41 …… Data transfer device, 42 to 42n …… Peripheral device.

Claims (2)

(57) [Claims] 1. A data transfer device comprising a plurality of control channels and a channel control device for controlling the control channels, wherein the control channels hold a service code storage section for storing a series of service codes and test data. A loopback mode setting unit that has a data transfer circuit having a data area and that sets the control channel to the loopback mode by the control channel in response to an instruction from the channel controller; and if the setting mode is the loopback mode, the service code Read the command request service code from the storage unit and send it to the channel control device,
Upon receiving a data read command or a data write command from the channel control device based on the command request service code, a data transfer instruction service code is taken out from the service code storage unit and sent to the channel control device, and then the channel control device. And a data read command from the channel control device in the loopback mode in response to a data transfer end command from the data transfer end service code fetched from the service code storage unit and sent to the channel control device. And the test data which is input to the data transfer circuit in advance from the outside in accordance with a data transfer instruction command and is held, and which is sent to the channel controller to receive the data transfer end command from the channel controller. Test data sending means for ending sending, and test data sent from the channel control device in the return mode in accordance with the data write command from the channel control device to the data area secured in advance in the data transfer circuit. A test data receiving means for receiving and storing, and receiving the data transfer end command from the channel control device to end the reception of the test data. 2. The service code storage unit receives a service code memory in which a service code is stored in advance, and outputs a read address of the service code memory when the return mode is set and when the data read command or the data write command is received. And a service code register for storing and outputting the service code read from the service code memory when receiving the data read command or the data write command when the return mode is set and A data transfer device having a function confirmation function according to claim 1, which is configured.