JPS63155841A - Data output device - Google Patents

Abstract

PURPOSE:To cope with changes of the transmission system and the transmission speed without changing hardware by forming the logical data with the mark length and the space length to transmit it and changing these lengths in response to the transmission system and the transmission speed. CONSTITUTION:A request accepting part 41 sends the received output request to a deciding part 42 and devices an RZ or NRZ transmission system to give the result of this decision to an output bit processing part 47. The part 42 sends the data on the transmission speed and the logical data to a time width calculation part 43 for calculation of both the mark length time width and the space length time width to valve these calculation results to a mark length time width setting part 44 and a space length time width setting part 45 respectively. Both parts 44 and 45 set the corresponding time data at a timer IC 46. An end deciding part 48 detects that the logical data is stored in a data storing part 49 and delivers an extraction signal. The IC 46 gives the clocks showing the start and the end of a mark to an output bit processing part 47 by the set time data.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a data output device that can be used in various data communications.

(Prior art) In serial data transmission using the PZ method, etc., when the logical data is "1", the long mark M[
and L level short space SS, data “1” is
The configuration is as shown in FIG. 4(a), and the logical data is “O′”.
In this case, a method is adopted in which data ``O'' is constructed from the short mark MS of the H level and the short space of the L level, as shown in FIG. 4(b). With this method, rlo
When serial data of "looo...0" is constructed, this datum changes in level as shown in FIG.

By the way, the time widths of the long mark ML, 5U mark MS, and short space SS differ depending on the transmission speed. For example, when the transmission speed is 25 bits/Sec, the time width of the long mark ML is 120 m5ec. , the time width of short mark MS and short space SS is assumed to be 40m5ec, and when the transmission rate is 50 bits/Sec, the time width of long mark M[ is assumed to be 60m5eC, and the time width of short mark MS and short space SS is assumed to be 20m5ec. Ru. Furthermore, the NRZ method is sometimes adopted as the transmission method, and the transmission method and transmission speed differ depending on the system.

The conventional data output vc@ used for transmitting serial data as described above was configured as shown in FIG. In this output device, logic data related to output is given to a buffer section 2 and a counter section 3 via a signal line 1, and when a predetermined number of logic data arrives, the counter section 3
instructs the data retrieval unit 4 to retrieve the data, and the data retrieval unit 4 retrieves the logical data from the buffer unit 2 and sends it to the verification unit 5. If the given logic data is "1", the verification section 5 activates the first pulse generation section 6 and causes the signal line 7 to send out data as shown in FIG. 4(a). , if the given logic data is O゛, the second pulse generator 8 is activated and the signal is output from the signal line 9 (Fig. 4 (1)).
Send the data as shown in .

However, the data output device with the above configuration is made of fixed hardware and can only support a predetermined transmission method and transmission speed. Therefore, if you want to change the specifications while the system is in operation, or if you want to operate the system by switching, such as using the RZ method at one time and the NRZ method at another time, you can handle this. There wasn't. That is, if the transmission speed or transmission method is changed, the buffer section 2, counter section 3, first pulse generation section 6, and second pulse generation section 8 must be replaced, which lacks versatility and is inconvenient. Met.

(Problems to be Solved by the Invention) As described above, with conventional data output devices, each part is fixed by hardware and can only support a predetermined transmission method and transmission speed, lacking in versatility and being inconvenient. It was something. The present invention was devised in view of the drawbacks of the conventional data output device, and its purpose is to output data without requiring any changes to the hardware, even if the transmission method or transmission speed is changed. It is an object of the present invention to provide a data output device that is capable of outputting data and is versatile.

[Configuration of the Invention (Means for Solving Problems °) In the present invention, when an output request including data regarding a transmission method and a transmission rate is given, the time width of the mark length and space length is determined based on this output request. a time width determining means for determining the time width; and a data configuration sending for transmitting data to be output in response to the output request configured by a mark length and a space length having a time width determined by the time width determining means. A data output device is constructed by comprising means.

(Operation) According to the above configuration, the time width determining means determines the time width of the mark length and space length based on the output request, and the data configuration transmitting means receives this, and the new data is determined from the logical data to be transmitted. Since the configuration is performed, even if the transmission speed, transmission method, etc. are changed, data having mark lengths and space lengths corresponding to the changes can be output.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of one embodiment of the present invention. In the figure, 41 indicates a request receiving section. This request reception unit 4
1 receives an output request and logical data from means (not shown) via a signal line 51. This output request includes
Data regarding the transmission method (here, RZ method or NRZ method) and transmission speed is included. Request reception unit 41
If the arriving signal is an output request, this is determined by the judgment unit 4.
2, and if the arriving signal is logical data, it is sent to the determining unit 42 and the data storage unit 49.
The data storage section 49 is constituted by a FIFO memory, the capacity of which is determined in advance with a margin depending on the system. The determining unit 42 analyzes the given output request, detects whether the transmission method is the RZ method or the NRZ method, and sends a signal indicating which method is the transmission method to the signal line 59.
It is applied to the output bit processing section 47 via. In addition, the determining unit 42 determines data regarding the transmission speed and logical data.
It is sent to the time width calculation unit 43. The time width calculating section 43 calculates the mark long time width and the space long time width based on the given data, and sends the calculation results to the mark long time width setting section 44 and the space long time width setting section 45. Give data. Note that one of the data of the calculation results regarding the long mark and the similar mark is given to the mark long time width setting unit 44 in correspondence with the logical data "1" and "0". The mark long time width setting section 44 and the space long time width setting section 45 are, respectively,
Based on the given data, corresponding time data is set in the timer IC 46. This set of time data is
This is done when the end determination section 48 outputs a set signal to the signal line 55 as active. The end determination unit 48 detects that the logical data has been stored in the data storage unit 49, and at this time outputs a set signal as active through a signal line 55 and an active takeout signal through a signal line 56. The timer IC 4B indicates the start and end of a mark (or the start and end of a space) to the output bit processing section 47 based on the time data set by the mark long time width setting section 44 and the space long time width setting section 45. While giving the clock, the time that is the sum of the set mark length time and space length time (1 bit time)
Every time lapses, a signal indicating the end of one bit is given to the end determining section 48 via the signal line 54, and the end determining section 48 is restarted. Thereby, the end determination unit 48 detects whether or not logical data is stored in the data storage unit 49,
When the data is stored, the signal @55.56 is activated, but when it is detected that the data is not stored, an end signal is sent through the signal line 53, and a means (not shown) is instructed to end the data output. tell.

On the other hand, logical data is extracted one bit at a time from the data storage section 49 each time the extraction signal on the signal line 56 is activated, and sent to the output bit processing section 47 via the signal line 58. Logic data (“1” or “0”) is sent to the output bit processing unit 47 via a signal line 58, data indicating whether the system is RZ system or NRZ system is sent via a signal line 59, and a mark is sent from the timer IC 4B. Since clocks indicating the start and end (or the end and start of a space) are given, the output bit processing unit 47 converts the logical data based on these clocks.
It is output via the signal line 57 as new data having the required mark length and space length.

In the above configuration, the request accepting section 41, the determining section 42, and the time span calculating section 43 constitute the time span determining means 100.

The time width determining means 100 has a function of determining a mark long time width and a space long time width based on an output request. Also, a mark long time width setting section 44, a space long time width setting section 45, a timer IC 4B, an output bit processing section 47
, the end determination section 48 constitutes the data structure sending means 200. The data structure sending means 200 converts the logical data into data having the mark length and space length determined by the time width determining means 100.

Incidentally, in the above configuration, the components other than the timer IC 46, data storage section 49, and output bit processing section 47 can be realized by microcomputer hardware and software. The flowchart in this case is shown in Figure 2.
It is shown in Figure 3. The operation according to this flowchart will be explained as follows. First, the given data is stored in a predetermined area of the memory (301), the mark long time width and the space long time width are calculated from the data regarding the transmission speed in the stored data, and the calculation results are stored in the predetermined area. (302>, Next, based on the data related to the transmission method stored in step 301, it is detected whether it is the RZ method or not (303). If it is the RZ method, the hardware that performs the data output operation (output (corresponding to the bit processing unit 47) to output a mark (304)
, and based on the 1-bit logical data to be output, time data corresponding to the mark long time width is set in the timer IC (3()5), and a mark outputting flag is set (30B). On the other hand, if it is detected in step 303 that the system is not the RZ system (NRZ system), the logical data is retrieved from the area stored in step 301 (307), and the mark length is determined based on this logical data and the transmission speed. Set the time data corresponding to the width and space long time width to the timer IC, and set the time data to 1 according to the logical data.
” or “O'” is set in the hardware (308). The above is the initial pressure when the output request was given. After this process, the process proceeds to the process shown in FIG.

First, based on the data related to the transmission method stored in step 301, it is detected whether or not the transmission method is the RZ method (401).
If it is the mark output mode, it is detected whether the mark is being outputted using the mark outputting flag (402). If it is detected that the mark is being output, the mark output flag is reset (403), the hardware that outputs data is made to output a space (404), and the timer IC is sent to the timer IC for a period corresponding to the mark long time width. Set time data 405)
, return to step 401. If it is detected in step 401 that it is not the RZ method, or if it is detected in step 402 that the mark is not being output, check whether the output of the data to be transmitted (the given number of logical data) has been completed. If it is detected that the output has not been completed (406), then the next logical data is extracted (407), and steps 408 to 411 corresponding to steps 303- to 30B in FIG. 2 are performed, and step 4 is performed.
Return to 01. At this time, in step 40B, RZ
If it is detected that it is not the method, step 412
At this point, the same process as step 308 in FIG. 2 is performed, and the process returns to step 401. Also, step 406
When the end of the output is detected, the timer IC is initialized and the two main programs are notified of the end of the output (similar to the process by the signal line 53 in FIG. 1), and the operation is ended.

As described above, according to this embodiment, the mark length and space length are determined based on the data indicating the transmission speed and transmission method (RZ method or NRZ method) included in the output request, and the logical data is marked. Since the data is configured by length and space length and transmitted, it is possible to flexibly respond to changes in transmission methods and transmission speeds. When the configuration is implemented using a microcomputer as in this embodiment, it is convenient because it can be handled by changing the software.

[Effects of the Invention] As explained above, according to the present invention, logical data is configured and transmitted by mark lengths and space lengths, and the mark lengths and space lengths can be changed depending on the transmission method and transmission speed. Since the transmission method and transmission speed can be changed without changing the hardware, it is extremely convenient.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention, FIG.
FIG. 4 is a flowchart for explaining the operation of an embodiment of the present invention, FIGS. 4 and 5 are diagrams showing the structure of data according to the RZ method, and FIG. 6 is a block diagram of a conventional data output device. 41...Request reception unit 42...Judgment unit 43...
Time width calculation section 44... Mark long time width setting section 45.
... Space long time width setting section 46 ... Timer IC 47 ... Output bit processing section 48
. . . Completion determination section 49 . . . Data storage section 100.
...Time span determining means 200...Data configuration sending means Agent Patent attorney Noriyuki Chika Yudo Sanno −

Claims (1)

[Claims] time width determining means for determining time widths of mark lengths and space lengths based on the output request when an output request including data regarding a transmission method and a transmission speed is given; and data to be output in response to the output request. 2. A data output device comprising: data structure sending means for sending out a data structure formed by a mark length and a space length having a time width determined by the time width determination means.