JPH0287292U - - Google Patents
Info
- Publication number
- JPH0287292U JPH0287292U JP16581188U JP16581188U JPH0287292U JP H0287292 U JPH0287292 U JP H0287292U JP 16581188 U JP16581188 U JP 16581188U JP 16581188 U JP16581188 U JP 16581188U JP H0287292 U JPH0287292 U JP H0287292U
- Authority
- JP
- Japan
- Prior art keywords
- key
- processing
- switches
- scanning
- matrix circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011159 matrix material Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
Description
第１図はこの考案の一実施例に係る電子楽器の
全体構成図、第２図は実施例のメインのフローチ
ヤート、第３図は実施例の鍵盤処理のフローチヤ
ート、第４図は従来技術における鍵盤処理のフロ
ーチヤート、第５図は信号の回り込みを説明する
のに用いたキーマトリクス回路を示す図である。
１……キーマトリクス回路、２……ＣＰＵ、Ｓ
Ｗ……キースイツチ、Ｄ……ダイオード。
Fig. 1 is an overall configuration diagram of an electronic musical instrument according to an embodiment of this invention, Fig. 2 is a main flowchart of the embodiment, Fig. 3 is a flowchart of keyboard processing in the embodiment, and Fig. 4 is a conventional technique. FIG. 5 is a diagram showing a key matrix circuit used to explain the looping of signals. 1...Key matrix circuit, 2...CPU, S
W...key switch, D...diode.
Claims (1)
子を介することなく複数のキースイツチをマトリ
クス状に接続したキーマトリクス回路手段を走査
して鍵処理を行う電子楽器の鍵処理装置において
、 前記キーマトリクス回路手段の走査から、押鍵
状態にあるキースイツチの数を検出する押鍵数検
出手段と、 前記押鍵数検出手段の検出結果を受け、検出さ
れた押鍵状態にあるキースイツチの数が所定数以
下の場合にのみ、これらのキースイツチに対する
押鍵処理を行う押鍵処理手段と、 前記押鍵数検出手段の検出結果にかかわらず、
前記キーマトリクス回路手段の走査から離鍵状態
に変化したキースイツチが読み取られた場合には
そのキースイツチに対して離鍵処理を行う離鍵処
理手段と、 を有することを特徴とする電子楽器の鍵処理装
置。[Claims for Utility Model Registration] Key processing for an electronic musical instrument in which key processing is performed by scanning a key matrix circuit means in which a plurality of key switches are connected in a matrix without using a directional circuit element to prevent signals from going around. The apparatus includes: a pressed-key number detecting means for detecting the number of key switches in a pressed state from the scanning of the key matrix circuit means; key press processing means that performs key press processing on these key switches only when the number of key switches is less than a predetermined number, regardless of the detection result of the key press number detection means;
Key processing for an electronic musical instrument, comprising: key release processing means for performing key release processing on a key switch when a key switch that has changed to a released state is read from the scanning of the key matrix circuit means; Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16581188U JPH0287292U (en) | 1988-12-23 | 1988-12-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16581188U JPH0287292U (en) | 1988-12-23 | 1988-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0287292U true JPH0287292U (en) | 1990-07-10 |
Family
ID=31452639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16581188U Pending JPH0287292U (en) | 1988-12-23 | 1988-12-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0287292U (en) |
-
1988
- 1988-12-23 JP JP16581188U patent/JPH0287292U/ja active Pending
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