JPH04127344A - Input/output device control system - Google Patents

Abstract

PURPOSE:To simultaneously store the common data in each memory, respectively by transmitting control data, and thereafter, containing desired common data in transfer data and sending it out. CONSTITUTION:Input/output devices, for instance, display devices 111 - 113, and a printer device 12 have memories 131 - 133 and 14, respectively. In such a state, a machine number 16a being common to plural input/output devices 111 - 113, 12 is set as a device address, and in transfer data 17, a data type 17a and a block number 17b are set, respectively, and data 17c is stored in a memory position corresponding to the block number 17b of the input/output device which coincides with the data type 17a in plural input/output devices 111 - 113, 12 being in a common data request state. In such a way, in the case data transferred to the input/output devices being in the same data transmission line are the same, the time required for the data transfer is decreased.

Description

[Detailed Description of the Invention] [Summary] Regarding the input/output device control method for data transfer from a host computer to an input/output device, if the data to be transferred to the input/output devices on the same data transmission path is the same, the data The purpose is to reduce the time required for transfer, and after sending control data that includes a device address from a host device to multiple input/output devices connected to the same transmission line, the transfer data is sent to match the device address. In an input/output device control method that causes an input/output device to perform an operation based on the transferred data, a common device number is set for the plurality of input/output devices as the device address, and the transferred data includes the information of the input/output device. The data type indicating the type and the block number when the transfer data content is divided into blocks are set respectively, and the data type of the input/output device corresponding to the data type among the plurality of input/output devices in the common data request state is set. Data is configured to be stored in a memory location corresponding to a block number.

[Industrial application field]

The present invention relates to an input/output device control method, and particularly to an input/output device control method for data transfer from a host computer to an input/output device.

In recent years, the functions of input/output devices have been greatly enhanced, and the amount of programs required for them has also increased significantly. If you store this large amount of control programs in read-only memory (ROM) or external storage,
The price of the entire input/output device becomes high, and maintenance/function changes cannot be quickly responded to. Therefore, an increasing number of input/output devices are designed to download the above-mentioned control program and store it in a random access memory (RAM) on the input/output device side from the host device side.

Furthermore, as higher-level computers become more sophisticated/memory capacity increases, the number of connectable input/output devices tends to increase. For this reason, when a large number of input/output devices using the download method described above are connected to a host device, it is necessary to control the startup of the input/output devices so as not to be delayed.

[Conventional technology]

FIG. 5 shows a system configuration diagram of an example of a conventional input/output device control method. In the figure, 1. and l is a display device, 2 is a printer device, and these are input/output devices,
There are n+1 units in total, #0. #1. ..., #n
address has been assigned. 3 is an information processing device;
Corresponds to the upper level device of the input/output device, and the input/output device control circuit 3
a, a transfer data generating section 3b, and the like. The above display device 111'12+ printer device 2 and information processing device 3 are connected via a transmission line 4.

Next, the operation of this conventional input/output device control system will be explained with reference to FIG. 6. When the information processing device 3 transfers data, it first receives control data D having the address of the input/output device to be transferred from the input/output device control circuit 3a. Then, the transfer data DT is sent to the transmission line 4 from the transfer data generating section 3b through the input/output device control circuit 3a.

As shown in FIG. 6, the display devices l, to 13 have memories 5. 53 respectively, and a printer device 12
It also has a memory 6. The memories 5, 52, and 6 are constituted by, for example, RAM.

The input/output devices such as the display device 1 l-12 and the printer device 2 determine whether or not the address #m of the control data type input via the transmission line 4 matches the address assigned to itself, and determine whether the address #m of the control data type input via the transmission line 4 matches the address assigned to itself or not. Only when the transfer data DT follows the control data is stored in its own memory.

After storing, the input/output device performs input/output operations based on the stored transfer data D.

Note that the above data transfer is performed in a constant amount of data under the control of the information processing device 3, and when data is transferred to a plurality of input/output devices, it is performed in the order of the device addresses.

[Invention or problem to be solved]

However, in the conventional input/output device control method described above, even if the data to be transferred to the input/output devices is the same, the data is transferred in a fixed amount in the order of the device addresses. Therefore, when there are a large number of input/output devices, there is a problem in that it takes a very long time to complete the transfer of all data even if the transferred data contents are the same.

The present invention has been made in view of the above points, and an object of the present invention is to provide an input/output device control method that reduces the time required for data transfer when the data to be transferred to the input/output devices on the same data transmission line is the same. purpose.

[Means to solve the problem]

FIG. 1 shows a diagram explaining the principle of the present invention. As shown in FIG.
12, etc.), the host device sends the transfer data 17 after sending the control data I6 including the device address, and causes the input/output device matching the device address to perform the operation based on the transfer data 17. In the control method, a plurality of input/output devices 11. ~11. .

12, a data type 17a and a block number 17b are respectively set in the transfer data 17, and a plurality of input/output devices 11 in a common data request state are set.
．． ~]ls,! 2, data 17c is stored in a memory location corresponding to block number 17b in the memory of an input/output device that matches data type 17a.

Here, the above data type 17a indicates the type of input/output device, and the above block number 17b indicates the division order when the data content is divided into blocks.

[Effect]

In the present invention, an input/output device, for example a display device If,
~112. Each printer device 12 has a memory 13 . ~13
．． , 24, and causes these input/output devices to perform processing according to the flowchart shown in FIG. That is, it is determined whether the input/output device matches the device address in the control data 16 sent via the transmission line I5 (step 21), and if it does not match, the device address or the common device number 16a is #X. (Step 22)
).

When it is determined that the common device number 16a has been received, it is then determined whether the input/output devices 111 to 11) and 12 are in the common data request state (step 23), and if the common data request state is present, the transfer data is sent. If the data type 17a is the same as the requested data, the data 17C is stored in the memory location y corresponding to the block number 17b (step 24).

Therefore, in the present invention, if the data to be transferred from the host device is the same, after transmitting the control data 16 with the device address as the common device number 16a, the desired common data 17c is included in the transfer data 17 and sent. As a result, common data 1 is transferred to each memory of all input/output devices in the common data request state without transferring data in the order of device addresses.
7c can be stored simultaneously.

〔Example〕

FIG. 3 shows a system configuration diagram of an embodiment of the present invention. In the figure, the same components as in FIG. 1 are denoted by the same reference numerals, and their explanations will be omitted. In FIG. 3, 18 is an information processing device, and display devices II to 113. Printer device 12
It is a host device of the other input/output devices, and has an input/output device control circuit 18a and a transfer data generation section +8b. When the data to be transferred exceeds a predetermined amount, the transfer data generating section 18b divides the data into a plurality of blocks and sends the data block by block in block order. The transmission line 15 includes a display device 11. ~113 and printer device 12 are connected, and each device address is #0. #1. #2 and #3 are assigned.

Next, the operation of this embodiment will be explained with reference to FIG. 4. Here, the display devices 11 to IIs are the same devices that become operable after data is transferred by download from the information processing device 18, and
8 can control up to seven input/output devices with one transmission line 15, but only six devices at most can be connected, and therefore address #7 is assumed to be an empty device number.

In this case, the information processing device 18 first starts from the input/output device circuit 18a, as shown in FIG.
is set as the common machine number 16a, and control data 16 synthesized in time series with the control code 16b is generated and sent to the transmission line 15. Display device 11. ~113 and the printer device 12 are set in advance to be a common machine number when the device address in the control data 16 is #7, so it is determined whether or not they are in the common data request state by receiving the above control data 16. Do this.

Next, the information processing device 18 uses the input/output device section circuit 18a to input data type 17a and block number 1 as shown in the fourth @.
7b, these are synthesized in time series before the transfer data from the transfer data generating section 18b, and sent to the transmission line 15 as transfer data 17. Here, display device 11. If the display control program of block number 2 is to be transferred to IIs, the data type 17a above is set to a value indicating the display, the block number J7b is set to #2, and the data type 17c is set to #2.
The display control program is transferred to.

As a result, the display device 11. ~I'1 When z is in the common data request state, the respective memories 13. The display control program 17c in the transfer data 17 is stored in the memory location corresponding to the block number #2 of ~13°. On the other hand, even if the printer device 12 is in the common data request state,
Since the data type 17a is different, no data is written to the memory 14.

Therefore, according to this embodiment, the display device 11 I
- Compared to the conventional method in which control data having different device addresses assigned in advance to the 11s are sent sequentially and the same data is transferred three times in sequence, the control data 16 and the transfer data 17 In the case of the same data, only one transmission is required, and the efficiency of data transfer can be improved. In addition, the host device (information processing device 18)
The number of requests for data can also be reduced compared to conventional methods.

〔Effect of the invention〕

As described above, according to the present invention, when transferring the same data, it is only necessary to send the data once without sending the data in the order of the device addresses. Therefore, data transfer can be made more efficient than in the past. Furthermore, since the data storage time and data input waiting time of the input/output device can be shortened, the input/output device can be operated quickly.

[Brief explanation of drawings]

Fig. 1 is a diagram explaining the principle of the present invention, Fig. 2 is a processing flowchart of the input/output device in Fig. 1, Fig. 3 is a system configuration diagram of an embodiment of the present invention, and Fig. 4 is the same as that shown in Fig. 3. FIG. 5 is an explanatory diagram of the control method. FIG. 5 is a system configuration diagram of an example of the conventional system. FIG. 6 is an explanatory diagram of the control method of FIG. In the figure, 11 to IIs are display devices, 2 is a printer device, 3, to 113, and 14 are memories, 5 is a transmission line, 6 is control data, 6a is a common machine number, 7 is transfer data, 7a is a data type, 7b is a block number, 8 is an information processing device, a is an input/output device control circuit, and 8b is a transfer data generation section.

Claims (2)

[Claims] (1) For multiple input/output devices (11_1 to 11_3, 12) connected to the same transmission line (15),
18) In an input/output device control method in which transfer data (17) is sent after sending control data (16) including a device address, and the input/output device that matches the device address is made to perform an operation based on the transfer data (17). , the plurality of input/output devices (11_
1 to 11_3, 12), and the transfer data (17) includes the input/output device (11_3, 12).
Data type (1 to 11_3, 12) indicating the type
7a) and the block number (17b) when the transfer data content is divided into blocks, respectively, and the plurality of input/output devices (11) in the common data request state are set.
_1 to 11_3, 12), the data type (17a
) of the memory of the input/output device that matches the block number (
17b) An input/output device control method characterized in that data is stored in a memory location corresponding to item 17b). (2) The host device (18) has an input/output device control circuit (
18a) and a transfer data generation section (18b), and the input/output device control circuit (18a) has the common machine number (16a).
Or, after sending control data including an arbitrary device address to the transmission path (15), the transfer data generation section (18b)
The input/output device control according to claim 1, characterized in that the data type (17a) and the block number (17b) are added to the data (17c) to be transferred from the input/output device control device, respectively, and the data is sent to the transmission path (15). method.