• 追加された行はこの色です。
  • 削除された行はこの色です。
#freeze
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 *発光ダイオード(LED)の明るさを変える [#e8372b5b]
 
 PIC 16F628A内臓のＰＷＭ機能を利用し、発光ダイオードの明るさを徐々に変えてみよう。　　06/10/28
 
 注)16F628Aの場合、PWM信号はRB3から発信される。
 
 関連MikroC関数
 void Pwm_Init(unsigned long freq);
 void Pwm_Change_Duty(unsigned short duty_ratio);
 void Pwm_Start(void);
 void Pwm_Stop(void);
 
 |&attachref(LEDの明るさを変える.JPG,zoom,150x150,button){新しい写真添付};|&attachref(LEDの明るさを変える.jpg,zoom,150x150,button){新しい写真添付};|
 
  /**
  * ＰＷＭ機能で発光ダイオードの明るさを徐々に変える
  * PIC 16F628A
  * 発信器:内臓4MHz 
  * 電源:乾電池3本
  * RB3: LED (CCP出力)
  * RB2: LED (照度比較用)
  * Device Flags: _BODEN_OFF _BOREN_OFF _CP_OFF _PWRTE_ON _WDT_OFF
  * 　　　　　　　_LVP_OFF _MCLRE_OFF _INTRC_OSC_NOCLKOUT
  * 言語 MikroC v6.2
  */
  void main(){ //メイン プログラム
      unsigned short int i; //使用変数の定義
      PORTB = 0b00000000; //PORTBの中身をきれいにする
      TRISB = 0b00000010; //RB1は1:入力、他のPORTBは0:出力に設定
      PWM_Init(5000); //PWMの初期化 (5KHz周期指定)
      
      PORTB.F2 = 1; //照度比較用LED ON
      
      PWM_Start(); //PWM機能スタート
      do { //doとwhileの間を繰り返す
          //LEDの明るさを徐々に変える
          for (i = 0; i < 256; i++) {
              PWM_Change_Duty(i); //PWMのDuty変更
              Delay_ms(100); //100msec待つ
          }
      } while(1); //doとwhileの間を繰り返す
  } //メイン プログラム終了
 
 ★この情報は役に立ちましたか？
 #vote(はい[19],普通[4],いいえ[8])
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