JPS6364748B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for reading and writing program steps in a programmable oscilloscope.

In this specification, a programmable oscilloscope refers to the selection of channels necessary for waveform display on the oscilloscope main body, trigger mode settings,
The settings of each setting section, such as measurement range setting, vertical axis position setting of the reference level of the displayed waveform, vertical axis sensitivity setting, horizontal axis time value setting, trigger polarity setting, etc., can be stored in advance according to the waveform to be observed. This refers to an oscilloscope that reads the stored settings corresponding to the observed waveform, sets each setting section according to the read settings, and displays the waveform.

In addition, the settings for each of the above settings can be made by setting the setting device corresponding to each setting section of the programmable oscilloscope or by setting the knobs of each setting section of the oscilloscope body that constitutes a part of the programmable oscilloscope. Then, the position of the setting device or knob is read and stored in the storage device.

The setting contents corresponding to each setting section are referred to as setting data in this specification. Further, such setting operation is performed for each waveform to be observed, and the result is stored in the storage device. In this specification, all setting data for one waveform to be observed is referred to as a program step. Therefore, a plurality of program steps consisting of a plurality of setting data are stored in the storage device, and normally several dozen program steps are stored.

On the other hand, each program step is handled as one group, and reading and writing from the storage device is handled as a group of stored data constituting each program step. Further, in order to identify each program step, a number is attached to each program step, for example, and reading of the program step from the storage device is carried out by designating the above-mentioned symbol. By specifying this number, a program step corresponding to the observed waveform is selectively called, and each setting section is set according to the selected program step, and waveform observation is performed.

However, when using a programmable oscilloscope, it may be necessary to perform so-called automatic operation in which a plurality of consecutive program step groups are sequentially selected and waveforms are observed sequentially.

For this purpose, conventional programmable oscilloscopes use a pair of digital switches, one of which is used to specify the first program step, the other one is used to specify the last program step, and the other is used to specify the last program step. By sequentially reading out the steps, each setting section of the programmable oscilloscope was set in sequence.
When selecting a plurality of consecutive program steps for this purpose, the operator must memorize the first program step and the last program step of the consecutive program steps to be selected next; The number of groups increases,
The programmable oscilloscope had the disadvantage of poor operability.

The present invention has been made in view of the above, and it is an object of the present invention to provide a method for reading and writing program steps in a programmable oscilloscope, which eliminates the above-mentioned drawbacks.

The present invention will be explained below with reference to Examples.

FIG. 1 is a block diagram of an embodiment to which the method of the present invention is applied. 1 is a storage device that stores program steps; 2 is an input/output device that guides the program steps read from the storage device 1 to the oscilloscope body, and also guides the settings of each setting section of the oscilloscope body to the storage device. It is a port,
The input/output designation register 3 switches between input ports and output ports. The example in the figure is for eight pairs of input/output ports, and the subscript 1 is for output.
Subscript 2 indicates input.

4 are registers c, e, g, and i for setting the first address value of each division when dividing the entire range of addresses in which the program steps of the storage device 1 are stored into a plurality of divisions (four in this embodiment); register d for setting the last address value of each section;
This is a register group for classification consisting of f, h, and j, and there is no problem even if a part of each classification is set overlappingly.

Reference numeral 5 denotes a register for selecting a division, and a number corresponding to the division to be selected is set externally. 6 is a first division divided by registers c and d, a second division divided by registers e and f, a third division divided by registers g and h, or A group register designating a fourth division divided by registers i and j, and 6 a decoder which decodes the output of register 5 and selects the first, second, third or fourth division. Yes, 7 is decoder 6
group register 5 and decoder 6
Select the first register c, e, g or i in the first, second, third or fourth section selected by or select the last register d, f, h or j This register is used to set whether or not to use this function, and is set externally.

On the other hand, 8 is an address counter that specifies the address of the storage device 1 by using the count value as an address, and 9 is an address counter that specifies the address of the storage device 1 by using the count value as an address, and 9 is the address value and address input from the control circuit 10, which will be described later, and which is set in the register 1 in the register group 4. This is a comparator that compares the count value of the counter 8, and the output of the comparator 9 is output to the control circuit 10.

The control circuit 10 receives the output of the read/write setting unit 10-1 and outputs a read signal or a write signal to the storage device 1, and the input/output designation register 3 issues an output for selecting the input side or the output side. Further, when the control circuit 10 is instructed to perform an up operation, that is, increase the address of the storage device 1 by the output from the up/down operation indicator 10-2, it increments the address counter 8 and increments the register group 4. The number set in the register d, f, h, or j that specifies the last address value of the currently specified section is output to the comparator 9, and a comparison signal is output at each increment to compare the two. A comparator 9 is used for comparison. Also, the control circuit 10
is configured to stop incrementing the count value of the address counter 8 upon receiving the output when the comparator 9 detects a match between both inputs. Further, when the control circuit 10 is instructed to perform a down operation, that is, to decrease the address of the storage device 1, by the output from the up/down operation indicator 10-2, it decrements the count value of the address counter 8 and The output of the decoder 6 outputs the number set in the register c, e, g, or i that specifies the first address value of the currently specified division to the comparator 9, and outputs a comparison signal for each decrement. The comparator 9 compares the two. Further, the control circuit 10 is configured to stop decrementing the count value of the address counter 8 upon receiving the output when the comparator 9 detects a match between both inputs.

First, when reading is specified by the read/write setting device 10-1, the control circuit 10
A read signal is output to the input/output switching register 3, and a read signal is output to the input/output switching register 3. Therefore, the input/output port 2 is switched to output, and the storage device 1 transfers the program step of the address indicated by the count value of the address counter 8 to the ports p ₁ , p ₁ , r ₁ , s ₁ , t ₁ , u ₁ , output to the oscilloscope body via v ₁ and w ₁ ,
Each setting section of the oscilloscope body is set according to each setting data of the program step stored at the address specified by the address counter 8.

Further, when the up/down operation indicator 10-2 instructs an up operation, that is, an increase in the address, the control circuit 10 reads the count value of the address counter 8. Next, the number set in the last register d, f, h or j of the section selected by group register 5 and register 7 is read. If the first category is now selected, the number in register d is read. Next, the control circuit 10 outputs the number set in the register d to the comparator 9 and also outputs a comparison command signal. Therefore, the comparator 9 compares both the number set in the register d and the count value of the address counter 8. This comparison result is output to the control circuit 10, and when the number set in register d is larger, a count pulse is output to the address counter 8 to increase the count value of the address counter 8.
1 and outputs a read signal to the memory device 1 to output the program step stored at the previous address +1 address in the memory device 1.
Further, as a result of comparing the number set in the register d and the count value of the address counter 8, if the two match, a pulse is output to the address counter 8 to stop incrementing the count value of the address counter 8. This is because if the increment continues, an address larger than the number set in register d will be specified.

Next, when the up/down operation indicator 10-2 instructs to decrease the address, the control circuit 1
0 first reads the count value of address counter 8. Then group register 5 and register 7
The first register c, e, of the section selected by
Read the position of g or i. If the second category is now selected, the number in register e is read. Next, the control circuit 10 outputs the number set in the register e to the comparator 9 and also outputs a comparison command. Therefore, the comparator 9 compares both the number set in the register e and the count value of the address counter 8.
The comparison result is output to the control circuit 10, and when the number set in the register e is smaller, a count pulse is output to the address counter 8 to decrease the count value of the address counter 8 by 1, and it is read out to the storage device 1. A signal is output to cause the program step stored at the previous address -1 of the memory device 1 to be output. As a result of comparing the number set in the register e and the count value of the address counter 8, if they match, a pulse is output to the address counter 8 to stop decrementing the count value of the address counter 8.

Next, when writing a program step to the storage device 1, a write signal is output to the control circuit 10 by the read/write setting device 10-1. Control circuit 1
0 receives a write signal and controls the input/output switching register 3 to control the input/output port 2 to bidirectional input/output. In this state, the setting data from the setting section of the oscilloscope main unit is sent to ports p ₂ , q ₂ , r ₂ , s ₂ , t ₂ ,
It is also possible to import program steps stored in the storage device 1 through ports p ₁ , _{q 1 ,} r ₁ , s ₁ , t ₁ , u ₁ , v ₁ , w ₁ through ports _{u 2} , v 2 , w 2 . It can be sent to the oscilloscope main body.
Next, the control circuit 10 specifies the address specified by the count value of the address counter 8 to the storage device 1, and stores the setting data of the setting section of the oscilloscope main body at the address of the storage device 1.

As described above, according to the present invention, the address range in which program steps are stored in a storage device is divided into a plurality of sections, a desired section is selected from the plurality of sections, and the program steps of the selected section are sequentially read. I can put it out. Therefore, operability is improved when selecting a plurality of consecutive program step groups and reading out the program steps in each divided range to set the settings section of the oscilloscope. There is no need to remember multiple and last program steps.

[Brief explanation of drawings]

The figure is a block diagram of an embodiment to which the method of the present invention is applied. 1... Storage device, 2... Input/output port, 3...
Input/output switching register, 4...Register group, 5...
Group register, 6...Decoder, 7...Register, 8...Address counter, 9...Comparator,
10...Control circuit, 10-1...Read/write setting device, 10-2...Up/down operation indicator.

Claims (1)

[Claims] 1 In a programmable oscilloscope,
a plurality of pairs of registers for dividing an address range of a storage device into a plurality of address ranges into which a first address value and a last address value of each address range are set to store program steps; Specify a pair of registers from the group, compare the last address value in the specified pair of registers with the count value of the address counter, and run the address counter until the last address value and the count value of the address counter match. The count value of the address counter is increased by 1, or the first address value in the specified pair of registers is compared with the count value of the address counter, and the address counter is counted until the first address value and the count value of the address counter match. -1 value
A method for reading and writing program steps in a programmable oscilloscope, characterized in that the address of the storage device is specified by an address counter.