JPS6319889B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is directed to an X-Y recorder, in particular, to obtain X-Y waveform dot data from time-series data of X-axis input and Y-axis input and output it to a graphic dot printer. This invention relates to an X-Y recorder.

Prior Art In conventional X-Y recorders, time-series data for X-axis input and Y-axis input is stored in respective memories, and in order to generate dot data, the memory contents are transferred as they are to buffer memory for temporary storage. I was feeding it to a graphic dot printer.

Problems with the Prior Art In such an X-Y recorder, the data stored in the memory is transferred directly to the buffer memory, so the capacity of the buffer memory becomes large, and when multiple channels are used, an even larger buffer memory capacity is required. Ta.

Purpose of the Invention The present invention has been made to solve these problems, and it provides time series data of X-axis input and Y-axis input in a 1-word n-bit configuration, and each X-axis data is After storing the Y-axis data in the Y-axis memory, the Y-axis data stored in the Y-axis memory address corresponding to the X-axis memory address storing the same X-axis data content is stored in one word 1. The present invention aims to provide an X-Y recorder which obtains bit data by reconfiguring the Y-axis data into bits and storing the contents of the Y-axis data in a corresponding one bit of a buffer memory.

Summary of the Invention FIG. 1 is an overall configuration diagram clearly showing the configuration of the present invention.

The X-Y recorder of the present invention includes an analog-to-digital converter 13 that converts the X-axis input and Y-axis input into X-axis data and Y-axis data of 1-bit and n-bit configuration, respectively, and In the X-axis memory,
Storage means 191 sequentially stores the Y-axis in the Y-axis memory
When the contents of the X-axis data stored at each address of the X-axis memory are made to correspond to each other in the prescribed order of the X-axis scale, the Y corresponding to the address of the X-axis memory storing the same X-axis data contents is By reconfiguring the Y-axis data stored at the address of the axis memory into 1 word and 1 bit, and storing the contents of the Y-axis data in the corresponding 1 bit of the buffer memory, the Y-axis can be adjusted according to the X-axis scale. A dot data generation means 192 capable of marking one dot at a corresponding position on the Y-axis scale according to the content of the data, and a dot data generation means 1
The graphic dot printer 33 receives the output from 92 and records dots at corresponding positions determined by the X-axis scale and the Y-axis scale according to the X-axis input and the Y-axis input.

Embodiment FIG. 2 is a block diagram showing an embodiment of the present invention.

In the figure, reference numeral 11 denotes an input switching means, such as a multiplexer, which alternately and sequentially switches analog input signals _S1 and _S2 such as voltage and current as X-axis input and Y-axis input, respectively, and outputs them in time series. do.

13 is an analog-to-digital converter (hereinafter referred to as A/D)
(referred to as a converter), and the X-axis input and Y-axis input are sequentially converted into 1 word n bits, for example 1 word 8 bits.
Convert the X-axis data signal to a bit-configured digital value.
S ₃ and Y-axis data signal S ₄ are sequentially applied to the input port 27 of the arithmetic unit 19. Note that if an A/D converter for the X-axis input and an A/D converter for the Y-axis input are provided separately, the multiplexer serving as the input switching means 11 becomes unnecessary.

15 is a clock generator, which generates a clock signal S ₅
is applied to the input port 27.

The arithmetic unit 19 is, for example, a central processing unit (CPU).
21, a read-only memory (ROM) 23, a read/write memory (RAM) 25, an input port 27, an output port 29, a bus line 31, and the like. The ROM 23 stores a control program for the CPU 21, and includes a program for storing X-axis data and Y-axis data and for generating dot data. The RAM 25 stores data such as X-axis data as an X-axis memory, Y-axis data as a Y-axis memory, and dot data as a buffer memory.
It is used to store calculation results, etc. for example,
2K bytes each for X-axis memory and Y-axis memory, and 32 bytes for buffer memory. The buffer memory requires a capacity to store dot data (points corresponding to the Y-axis memory) for one X-axis division (one line) of the graphic dot printer 33. As mentioned above, the input port 27 is connected to the A/D converter 13,
It is connected to a clock generator 15, etc., and an output port 29 is connected to a graphic dot printer 33. The bus line 31 includes an address bus line, a data bus line, a control bus line, etc. for connecting these.

The graphic dot printer 33 records input waveforms by marking dots at corresponding positions determined by the X-axis scale and Y-axis scale on the recording paper based on the dot data stored in the buffer memory.

Next, the operation of the embodiment of the present invention will be explained.

3 and 4 are flowcharts of the X-axis data and Y-axis data storage/dot data generation processing program. It is executed by steps P ₁ to _{P 23} , and _the X-axis data,
Y-axis data is stored in the X-axis memory and Y-axis memory, respectively, and dot data is generated and printed in steps _P11 to _P23 .

First, at _P1 in the same figure, the starting address of the X-axis data storage which becomes the X-axis memory of the RAM 25 is set.

At _P2 , set the starting address of the Y-axis data storage which becomes the Y-axis memory of the RAM 25.

At _P3 , it is determined whether the reference clock for storing the X-axis data and Y-axis data in time series has risen. If NO, the rising edge of the reference clock is determined repeatedly. If YES, go to _P4 .

In P ₄ , input the X-axis data.

At _P5 , the X-axis data is stored at the address of the X-axis memory.

In P ₆ , enter the Y-axis data.

At _P7 , the Y-axis data is stored at the address of the Y-axis memory.

At _P8 , increment the X-axis data address.

Increment the Y-axis data address at _P9 .

At _P10 , it is determined whether the X-axis data address has reached the final X-axis data address. If NO, the process returns to _P3 and steps _P3 to _P10 are repeated until the final address of the X-axis data is reached. In case of YES
Go to P ₁₁ .

At P ₁₁ , set the variable x to 0.

Clear the buffer memory in RAM25 with _P12 .

At _P13 , set the X-axis data to the first address of the X-axis memory for reading.

At _P14 , it is determined whether the contents of the X-axis data address and x are equal. If NO, go to P ₁₉ and
Increment the axis data address.

Next, in _P20 , it is determined whether the X-axis data address is greater than the final X-axis data address. In case of NO,
Return to _P14 and repeat steps _P14 , _P19 , and _P20 until the content of the X-axis data address becomes equal to x.
If YES, go to _P15 .

At _P15 , the contents of the Y-axis data address corresponding to the dot data address in chronological order are read.

Since each word is stored in the Y-axis memory in an 8-bit configuration, it is necessary to mark one dot corresponding to the content of this Y-axis data when recording, and the capacity of the buffer memory to store this dot data is In order to make it smaller, it is reconfigured into one word per bit and stored.

To this end, in _P16 , the content of the Y-axis data address is divided by 8 to calculate the quotient A.

Next, in _P17 , the content of the Y-axis data address is divided by 8 to calculate the remainder N.

Next, in _P18 , the Nth bit from the LSB (least significant bit) of the address obtained by adding A to the first address of the buffer memory is converted from the "0" level to the "1" level and the dot data is stored. When there is not much, the MSB (largest bit) of the corresponding address is set to level 1.

In addition, in P ₁₆ to _{P 18} , the contents of the Y-axis data are divided by 8 to calculate the quotient A and the remainder N, and from the quotient A and the remainder N, the Y-axis data is reconstructed into 1 word per bit. However, the reason why the content of the Y-axis data is divided by 8 is because the buffer memory is originally composed of 8 bits per word and has a capacity of 32 bytes (32 words) to store the total amount of information of 8 bits per word. This is because in order to reconstruct one word into one bit, it is appropriate to divide it into eight bits, that is, bytes, and select the corresponding one bit from each byte.

In this way, in steps _P14 to _P20 , search for all X-axis memory addresses where the X-axis data is 0, and if found, search for any of the Y-axis data at the same address as the X-axis memory address. 1 word each
It is reconstructed into bits and stored in buffer memory as dot data. If not, set as none.

At _P21 , the dot data in the buffer memory is outputted to the graphic dot printer 33 in order from the first address for the variable x=0 forming the contents of the X-axis data.

At P ₂₂ , set the variable x to x+1.

At P ₂₃ , it is determined whether the variable x is greater than 255.
If NO, go to _P12 and clear buffer memory. Again, for the content 1 of the X-axis data,
Steps _P14 to _P21 are performed, and the same process is repeated until the content of the X-axis data reaches 255 in _P23 . In the case of a 1 word 8-bit configuration, the variable x forming the contents of the X-axis data is treated as 256 from 0 to 255.

FIG. 5 is a diagram showing an example of dot data stored in the buffer memory. In the same figure, the hatched bits correspond to the contents of the X-axis data address x=0,
The contents of the chronologically corresponding Y-axis data address are 10,
This is the dot data stored in the buffer memory at times 21 and 30.

When taking out as a record, the paper feed direction of the graphic dot printer 33 is unidirectional, so if the paper feed direction is set to the x-axis, the X-axis data will be 256 lines (X-axis scale) sequentially from 0 to 255. becomes. At this time, each time you change the line, the graphic
The content of the dot data in the buffer memory is output to the dot printer, and a dot is recorded at the corresponding point on the Y-axis scale.

Effects of the Invention Since the X-Y recorder of the present invention has the configuration described above, the buffer memory of 1 word and n bits is reconfigured to 1 word and 1 bit to store dot data, so even if the capacity of the buffer memory is small. , RAM that can store a lot of dot data and used as X-axis memory and Y-axis memory
memory remainder or a separate small memory can be used. Furthermore, when using multiple channels, if one channel is set as the X-axis input, Y-axis multi-channels can be performed at the same time.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram clearly showing the configuration of the present invention. FIG. 2 is a block diagram showing an embodiment of the present invention. 3 and 4 are flowcharts of the X-axis data and Y-axis data storage/dot data generation processing program. FIG. 5 is a diagram showing an example of dot data storage in the buffer memory. 13... Input switching means, 19... Arithmetic device, 191
... Storage means, 192 ... Dot data generation means, 3
3...Graphic dot printer.

Claims (1)

[Claims] 1 1 word n each for X-axis input and Y-axis input
An analog-to-digital converter that converts X-axis data and Y-axis data into bit-configured data; a storage means that sequentially stores X-axis data in an X-axis memory and Y-axis data in a Y-axis memory; and an X-axis memory. When the contents of the X-axis data stored at each address are made to correspond to the specified order of the X-axis scale, the Y-axis memory address corresponding to the X-axis memory address storing the same X-axis data contents is Stored Y-axis data in 1 word 1
By reconfiguring the Y-axis data into bits and storing the contents of the Y-axis data in the corresponding bit of the buffer memory, one dot is placed at the corresponding position on the Y-axis scale according to the contents of the Y-axis data according to the X-axis scale. A dot data generating means that can mark a dot, and an output from the dot data generating means, and a dot is recorded at a corresponding position determined by an X-axis scale and a Y-axis scale according to an X-axis input and a Y-axis input. X-Y recorder equipped with a graphic dot printer.