JP2898181B2 - Waveform editing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for editing a waveform data stored in a waveform memory area in a waveform editing method for a waveform generator having a large-capacity waveform memory area and a small-capacity edit memory area.

[0002]

2. Description of the Related Art FIG. 2 shows a block diagram of a waveform generator. The waveform output memory 10 is a digital memory such as a random access memory (RAM), and can read stored digital waveform data at high speed. The digital waveform data read from the waveform output memory 10 is converted into an analog waveform signal by a digital / analog (D / A) converter 14 and output from an output terminal 16. Note that the waveform output memory 10 includes an address signal generator, an input / output buffer, and the like, but these are common and will not be described in detail.

[0003] The waveform output memory 10 is connected to a bus 18. The bus 18 has a central processing unit (CPU) 20 such as a microprocessor, a read-only memory (ROM) 22 storing a program, and a CPU 20. A RAM 24 serving as a working memory, an input device 26 such as a keyboard and a console controller, and a display device 28 are connected. The RAM 24 also has a waveform memory area and a waveform editing area, and the waveform memory area stores various waveform digital data supplied via the input terminal 25. The waveform digital data in the waveform data area of the RAM 24 is transferred to the waveform output memory 10 and used for outputting an analog waveform. Therefore, the capacity of the waveform memory area of the RAM 24 and the capacity of the waveform output memory 10 are equal. In addition, these blocks 20 to 26 perform various controls of waveform generation,
The result is displayed on the display device 28 or the like. The reason why both the waveform output memory 10 and the waveform memory area in the RAM 24 are provided is that the analog waveform of the stored waveform data can be output from the terminal 16 even during waveform editing.

When digital waveform data is stored in the waveform memory area of the RAM 24 from a computer or a digital oscilloscope via the input terminal 25, it may be necessary to edit the waveform. In this case, RA
The waveform data stored in the waveform memory area of M24 is transferred to the editing area in RAM24. The CPU 20 operates according to the program stored in the ROM 22,
The waveform data transferred to the edit area 24 is displayed on the display device 28 as an analog waveform. The operator operates the display device 2
The waveform data in the editing area of the RAM 24 is edited by the input device 26 while looking at the display 8. After the edited waveform data is stored again in the waveform memory area, it is transferred to the waveform output memory 10 and the D / A converter 14 outputs an analog waveform to the terminal 16.

[0005]

Recently, the storage capacity of the waveform memory area of the RAM 24 (corresponding to the storage capacity of the waveform output memory 10) has become extremely large, for example, 4 megabytes. As a result, a long waveform can be generated. However, the capacity of the edit memory area in the RAM 24 may be forced to be smaller than the capacity of the waveform memory area due to the type of the CPU 20 and restrictions on the system configuration. In such a case, the waveform data stored in the waveform memory area could not be edited.

Accordingly, an object of the present invention is to provide a waveform editing method capable of editing waveform data stored in a waveform memory area even if the storage capacity of the edit memory area is smaller than the storage capacity of the waveform memory area. .

[0007]

SUMMARY OF THE INVENTION The present invention is a waveform editing method for a waveform generator having a large waveform memory area and a small edit memory area. First, the number of divisions for dividing the waveform data stored in the waveform memory area into a plurality of sections or the size of one section is set. When the size of one section is set, the number of divisions is obtained from the capacity and size of the waveform memory area. Next, the waveform data in the section selected from the plurality of sections is transferred from the waveform memory area to the editing memory area, and after editing the waveform data in the editing memory area,
The edited data is returned to the waveform memory area.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A waveform generator used in the waveform editing method of the present invention has the same configuration as the block diagram shown in FIG. However, a program for waveform editing according to the flowchart shown in FIG. First, in step 30, the CPU 20 stores the RAM in the display device 28.
The size of each section or the number of divisions (total number of sections) when the entire 24 waveform memory areas are divided can be input, and that fact is displayed on the display device 28. The operator inputs the size or the number of divisions via the input device 26.

If it is determined in step 32 that a size has been input, the process proceeds to step 34, where the number of divisions is determined from the capacity of the waveform memory area and the input size. If the number of divisions has been input in step 30 or if the processing in step 34 has been completed, the process proceeds to step 36. In this step 36, the CPU 20 has already determined which address range of the waveform memory area corresponds to each section. In response, the CPU 20 displays a list of each section on the display device 28. The operator refers to this display and selects a section of the waveform data portion to be edited by using the input device 26.

In step 38, the CPU 20 sets R
The waveform data of the selected section of the AM24 waveform memory area is moved to the edit memory area of the RAM 24. The data in the editing memory area is edited by the operator using the input device 26 and the display device 28 in step 40. This editing operation is the same as the conventional waveform editing. But,
If the size of one section is smaller than the capacity of the edit memory area, the waveform portion is enlarged and displayed on the display device 28. If the size of one section is larger than the capacity of the edit memory area, The waveform portion is reduced and displayed on the display device 28. These enlargement and reduction can be arbitrarily controlled by the zoom function.

When the waveform editing is completed, in step 42, the edited waveform data portion is returned to the waveform memory area. Then, if the editing operation is completed, the process exits from this processing in a decision step 44. But,
If the editing operation is to be continued, the process returns to step S36. After all the processes are completed, the data in the waveform memory area of the RAM 24 is transferred to the waveform output memory 10.

Although the preferred embodiment of the present invention has been described above, various changes and modifications can be made without departing from the spirit of the present invention. For example, the waveform memory area of the RAM 24 and the waveform output memory 10 may be shared by a single memory area. That is, the output data of the waveform memory area of the RAM 24 may be directly supplied to the D / A converter 14.

[0013]

As described above, according to the present invention, a waveform can be edited efficiently even when the capacity of the edit memory area is smaller than the capacity of the waveform memory area. Further, since the size of the section to be edited can be selected from the size of each section and the total number of sections (the number of divisions), the editing work is further facilitated.

[Brief description of the drawings]

FIG. 1 is a block diagram of a waveform generator using the present invention.

FIG. 2 is a flowchart of a preferred embodiment of the present invention.

[Explanation of symbols]

 10 Waveform output memory 24 RAM including waveform memory area and edit memory area

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) H03B 28/00 G01R 31/3183 G10H 7/02

Claims (1)

(57) [Claims] 1. A waveform editing method for a waveform generator having a large-capacity waveform memory area and a small-capacity edit memory area, the number of divisions when dividing the waveform data stored in the waveform memory area into a plurality of sections. Or, when the size of one section is set, and when the size of the one section is set, the number of divisions is obtained from the capacity of the waveform memory area and the size, and the waveform data in the section selected from the plurality of sections is obtained. A waveform editing method, comprising: transferring from the waveform memory area to the edit memory area; editing the waveform data in the edit memory area; and returning the edited data to the waveform memory area.