JPH0498559A - Data transfer speed control system - Google Patents

Abstract

PURPOSE:To assure the coincidence of data transfer speeds between an input/ output processor and a peripheral processor by setting the information on the data transfer speed stored previously in a service processor as the data transfer speeds of the input/output processor and the peripheral processor themselves. CONSTITUTION:A data transfer speed control part 32 reads the data transfer speed set value (alphaMB/S) out of a data transfer speed control table 33 and transmits it to the interface control parts 12 and 22 of an input/output processor 11 and a peripheral processor 21 respectively. Both parts 12 and 22 receive the value (alphaMB/S) and set the information of this value to the data transfer speed tables 14 and 24 to control the data transmission/reception parts 13 and 23 respectively at a data transfer speed defined as alphaMB/S. Thus the data are transferred at the speed alphaMB/S in regard of the interface set between both processors 11 and 21.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an input/output processing device and a peripheral processing device of an information processing system in which there is a connection relationship for transferring data between the input/output processing device and the peripheral processing device. The present invention relates to a data transfer rate control method between

[Conventional technology]

Conventionally, this type of data transfer rate control method has been used to control the data transfer rate at which an input/output processing device operates when installing hardware for an information processing system. Similarly, set the data transfer speed at which the peripheral processing unit operates using a dip switch in the hardware in the peripheral processing unit, and by making each setting equal, the input/output processing unit and the peripheral It guaranteed consistency in data transfer rates between processing units.

[Problem to be solved by the invention]

The conventional data transfer rate control method described above always requires manual operation to set the data transfer rate of the input/output processing unit and peripheral processing unit using dip switches. The fatal drawback is that even if there is a mismatch in the data transfer speed between the computer and the peripheral processing device, it is impossible to detect it, and its operation is not guaranteed.

[Means to solve the problem]

The data transfer rate control method of the present invention includes a service processing device that controls an input/output processing device and a peripheral processing device,
The service processing device includes a data transfer rate management table that stores transfer rate information that predefines the data transfer rate between the input/output processing device and the peripheral processing device, and a data transfer rate management table that stores the transfer rate information that predefines the data transfer rate between the input/output processing device and the peripheral processing device. the input/output processing device has an input/output processing device data transfer rate table that stores the transfer rate information, and a data transfer rate control unit for transmitting the transfer rate information to the input/output processing device data transfer rate table. The input/output processing device interface control unit has an instruction and setting function for setting a speed, and further controls an interface with a lower-level device based on the transfer speed information in the input/output processing device data transfer speed table. The peripheral processing device has a peripheral processing device data transfer rate table for storing the transfer rate, and an instruction and setting function for setting the transfer rate information in the peripheral processing device data transfer rate table. a peripheral processing device interface control unit that controls an interface with a host device based on transfer rate information in a processing device data transfer rate table; a first communication means for mutual communication between the device interface control section and the data transfer rate control section; and a first communication means for mutual communication between the service processing device and the peripheral processing device; and second communication means for mutual communication.

〔Example〕

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

FIG. 1 is a block diagram showing a data transfer rate control method according to an embodiment of the present invention.

In FIG. 1, this embodiment includes a service processor 31, an input/output processing device 11 connected to the service processor 31 by a signal line 42, and a signal connected to the service processor 31 by a signal line 43 to the input/output processing device 11. The service processor 31 is configured with a peripheral processing device 21 connected by a line 41, and the service processor 31 has transfer rate information (data transfer rate setting value αMB/S) that predefines the data transfer rate between the input/output processing device 11 and the peripheral processing device 21. and a data transfer rate control unit 32 for transmitting transfer rate information to the input/output processing device 11 and the peripheral processing device 21, and the input/output device 11 transmits the transfer rate information. It has a data transfer rate table 14 to be stored, an instruction and setting function for setting transfer rate information in the data transfer rate table 14, and an interface with the peripheral processing device 21 based on the transfer rate information in the data transfer rate table 14. The peripheral processing device 21 has a data transfer rate table 24 that stores transfer rate information, and a data transfer rate table 24 that stores transfer rate information. an interface control unit 22 which has an instruction and setting function for setting transfer rate information in the data transfer rate table 24 and further controls an interface with the input/output processing device 11 based on the transfer rate information in the data transfer rate table 24; , a data transmitting/receiving section 23 for transmitting and receiving data with the input/output processing device 11, and a data transfer rate control section 32 and an interface control section 12.22 each have a function of transmitting and receiving transfer rate information. ing.

Next, the respective operations of the input/output processing device 111, the peripheral processing device 21, and the service processor 31 will be explained.

In the input/output processing device 11, the interface control unit 12 issues a “data transfer rate request command” to the data transfer rate control unit 32.

Next, the interface control unit 12 receives the data transfer rate setting value transmitted from the data transfer rate control unit 32, sets the received data transfer rate setting value in the data transfer rate table 14, and sets the data transfer rate setting value to the data transfer rate table 14. The data transmitter/receiver 13 is controlled at the data transfer rate set in the table 14. The data transmitting/receiving unit 13 transmits and receives data to and from the peripheral processing device 21 at a set data transfer rate, and the data transfer rate table 14 stores the data transfer rate setting value.

Similarly, in the peripheral processing device 21, the interface control unit 22 issues a “data transfer rate request command” to the data transfer rate control unit 32.

The interface control unit 22 is the data transfer rate control unit 3
The receiver receives the data transfer rate setting value sent from the data transfer rate table 24, sets the received data transfer rate setting value in the data transfer rate table 24, and transmits and receives data at the data transfer rate set in the data transfer rate table. The controller 23 controls the unit 23. The data transmitting and receiving unit 23 transmits and receives data to and from the input/output processing device 11, and the data transfer rate table 24 stores data transfer rate settings.

In the service processor 31, a data transfer rate management table 33 stores information that predefines the data transfer rate between the input/output processing device 11 and the peripheral processing device 21, that is, a data transfer rate setting value. In this embodiment, the data transfer rate setting value is set to αMB/S, for example. It is also assumed that the data transfer rate management table 33 is set by a hardware dip switch and is nonvolatile. When the data transfer rate control unit 32 receives the "data transfer rate request command", it reads the data transfer rate setting value from the data transfer rate management table 33, and
Sends the specified data transfer rate value to the device that issued the "data transfer rate request command".

Next, the data transfer rate control operation according to this embodiment will be explained.

When the input/output processing device 11 receives the initialization signal, the interface control section 12 issues a "data transfer rate request command" to the data transfer rate control section 32 through the signal line 42. When the data transfer rate control unit 32 receives the “data transfer rate request command”, the data transfer rate setting value (αMB
/S) and sends the data transfer rate setting value to the interface control unit 12. Upon receiving the data transfer rate setting value, the interface control unit 12 sets the data transfer setting value information in the data transfer rate table 14, sets the data transfer rate to αMB/S, and transmits the data transmission/reception unit 1.
3. Therefore, the input/output processing device 11 becomes operable as an interface with the peripheral processing device 21 at the data transfer rate αMB/S.

When the peripheral processing device 21 receives the initialization signal, the interface control section 22 issues a "data transfer rate request command" to the data transfer rate control section 32 through the signal line 43. When the data transfer rate control unit 32 receives the “data transfer rate request command”, the data transfer rate setting value (αMB/
S) and sends the data transfer rate setting value to the interface control unit 22. Interface control unit 2
2 sets the data transfer setting value information in the data transfer rate table 24 upon receiving the data transfer rate setting value;
Assuming the data transfer rate is αMB/S, data transmitter/receiver 2
3. Therefore, the peripheral processing device 21 becomes operable as an interface with the input/output processing device 11 at the data transfer rate αMB/S.

Therefore, from the above, the input/output processing device 11 and the peripheral processing device 2
1 has a data transfer rate of αMB/S.
Data transfer is performed at

〔Effect of the invention〕

As explained above, the present invention allows an input/output processing device and a peripheral processing device to use data transfer rate information preset and stored in a service processing device as the data transfer rate of the input/output processing device and peripheral processing device themselves. Setting this value has the effect of ensuring consistency in data transfer speed between the input/output processing device and the peripheral processing device.

FIG. 2 is a block diagram showing a control method.

DESCRIPTION OF SYMBOLS 11... I/O processing device, 12... Interface control unit, 13... Data transmission/reception unit, 14... Data transfer rate table, 21... Peripheral processing device, 22...
... Interface control unit, 23... Data transmission/reception unit, 24... Data transfer rate table, 31... Service processor, 32... Data transfer rate control unit,
33...Data transfer rate management table, 41.424
3...Signal line.

Claims (1)

[Claims] The service processing device includes a service processing device that controls an input/output processing device and a peripheral processing device, and the service processing device has a data transfer function that stores transfer rate information predetermining a data transfer rate between the input/output processing device and the peripheral processing device. a data transfer rate control unit for transmitting the transfer rate information to the input/output device and the peripheral processing device; the input/output processing device is an input/output processing device that stores the transfer rate information; a data transfer rate table, and an instruction and setting function for setting the transfer rate in the input/output processing device data transfer rate table; an input/output processing unit interface control unit that controls an interface with the device; The peripheral processing unit interface control unit has an instruction and setting function for setting transfer rate information and further controls an interface with a host device based on the transfer rate information in the peripheral processing unit data transfer rate table. , and a first communication means for performing mutual communication between the input/output processing device interface control unit and the data transfer rate control unit between the service processing device and the input/output processing device, and the service processing device and the peripheral processing device. a second device for mutual communication between the peripheral processing unit interface control unit and the data transfer rate control unit;
1. A data transfer rate control method comprising a communication means.