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*スイッチ入力(12F683) [#dd4fa543]

12F683(8ピンPIC)でスイッチ入力(スイッチのオン(ON)、オフ(OFF)信号をPICに取り込む)
を実現する場合、多くの項目の初期設定を行う必要がある。
その実例を紹介します。　　07/02/12

1.内部発振器を8MHzで使用
2.各ピンをデジタル入出力で使用
　　ANSEL = 0b00000000; //GP0-5をデジタル利用に設定
　　CMCON0 = 0b00000111; //コンパレータを使わない
3.信号入力ピンを内部プルアップする
　　OPTION_REG.NOT_GPPU = 0; //内部プルアップ利用に設定
　　WPU = 0b00000100; //GP2を内部プルアップ

|&attachref(P1010295.JPG,zoom,150x150,button){新しい写真添付};|&attachref(,zoom,150x150,button){新しい写真添付};|

 /**
 * スイッチ入力
 * （スイッチを押している間だけON、はなすとOFF）
 *
 * LED: GP4　　スイッチ: GP2
 *Clock: 8.0MHz 内蔵発振器使用
 *Device Flags:
 *　_CP_OFF  _MCLRE_OFF _PWRTE_ON　_WDT_OFF _INTRC_OSC_NOCLKOUT
 *
 * MikroC v2.1
 */
 void main() {
     TRISIO = 0b00000100; //GP2を1:入力に、他を0:出力設定
     //内蔵発振器 8MHz使用に設定
     OSCCON.IRCF2=1;
     OSCCON.IRCF1=1;
     OSCCON.IRCF0=1;
     ANSEL = 0b00000000; //GP0〜5をデジタル利用に設定
     OPTION_REG.NOT_GPPU = 0; //内部プルアップ利用に設定
     WPU = 0b00000100; //GP2を内部プルアップ
 
     GPIO = 0b00000000; //GPIOの中身をきれいにする
     CMCON0 = 0b00000111; //コンパレータを使わない
     
     do {
         if(Button(&GPIO, 2, 1, 0)) { //スイッチONの場合
             GPIO.F4 = 1; //LED ON
         } else {              //スイッチOFFの場合
             GPIO.F4 = 0; //LED OFF
         }
     }while(1);
 }


★この情報は役に立ちましたか？
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