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*スイッチ入力(16F1827 XC8) [#n8347044]

今回はスイッチ動作の確認を行った。
スイッチ(RB4)を押している間だけLED(RA1)が点灯するプログラム。

【ポイント】
・スイッチ(RB4)のプルアップは、16F1827のPORTBは内部ウィークプルアップ機能
を持っているので、これを利用した。
OPTION_REGbits.nWPUEN = 0; // 0:PORTB内部プルアップ利用に設定
WPUBbits.WPUB4 = 1; // RB4をウィークプルアップ
2014/1/1

|&attachref(TS3V0004.JPG,zoom,200x300,button){新しい写真添付};|&attachref(1827switchのプログラム画面.jpg,zoom,200x250,button){新しい写真添付};|

 /*スイッチを押してる間だけLEDが点灯する
  * PIC16F1827
  * XC8 v1.20
  * LED:RA1,RA2
  * スイッチ:RB4
  */
 #include <xc.h>
  
 #pragma config FOSC = INTOSC, WDTE = OFF, BOREN = OFF, IESO = OFF, FCMEN = OFF
 #pragma config PLLEN = OFF, STVREN = OFF, LVP = OFF
  
 int main(void) {
      //PICの初期設定
     PORTA = 0b00000000; //PORTAの中身をきれいにする
     PORTB = 0b00000000; //PORTBの中身をきれいにする
     TRISA = 0b00000000; //PORTA全てを0:出力に設定
     TRISB = 0b00010000; //PORTBはRB4を1:入力に他を全て0:出力に設定
     OSCCON = 0b01110000; //PLL:OFF, 内部クロック8MHzで駆動
     OPTION_REGbits.nWPUEN = 0; // 0:PORTB内部プルアップ利用に設定
     WPUBbits.WPUB4 = 1; // RB4をウィークプルアップ
     ANSELA = 0b00000000; //RA4(AN4)-RA0(AN0)は全て0:デジタルI/Oとする
     ANSELB = 0b00000000; //RB7(AN6)-RB1(AN11)は全て0:デジタルI/Oとする
  
     //メイン処理
     LATAbits.LATA2 = 1; //RA2:パワーオンを示すLED点灯
     while(1) {
          if(PORTBbits.RB4 == 0) { //RB4のswitch 0:downの時
             LATAbits.LATA1 = 1; //RA1 LED ON
          } else { //RB4のswitch 1:upの時
             LATAbits.LATA1 = 0; //RA1 LED OFF
          }
     }
 }

★この情報は役に立ちましたか？
#vote(はい[11],普通[0],いいえ[2])
- 元旦早々更新とは... --  &new{2015-01-13 (火) 18:28:05};
- 内容はともかく、年始早々picってねぇ --  &new{2015-01-18 (日) 11:54:00};
- XC8　ビット反転Switch case文サンプルプログラム --  &new{2015-02-26 (木) 15:41:03};
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