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Arduino week2

Arduino week2. 語法： Variables & Functions 實作： Digital out ( Button+LED ) 簡報：廖崇義. pinMode (). pinMode (pin , mode) pin 欲指定的腳位 數位腳位 D0~D13 m ode ( INPUT ,  OUTPUT , or  INPUT_PULLUP ) INPUT 將腳位設定為輸入使用 OUTPUT 將 腳位設定為 輸出使用 INPUT_PULLUP 將 腳位設定為輸入 使用，並且使用內部提升電阻 (see next page)

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Arduino week2

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  1. Arduino week2 語法：Variables & Functions 實作：Digital out (Button+LED) 簡報：廖崇義

  2. pinMode() • pinMode(pin, mode) • pin 欲指定的腳位 數位腳位 D0~D13 • mode (INPUT, OUTPUT, or INPUT_PULLUP) INPUT 將腳位設定為輸入使用 OUTPUT 將腳位設定為輸出使用 INPUT_PULLUP將腳位設定為輸入使用，並且使用內部提升電阻(see next page) EX1. pinMode ( 13 , OUTPUT ) EX2. intledpin = 13 ; pinMode( ledpin, OUTPUT )

  3. INPUT_PULLUP • PULLUP內部提升電阻 (深紅色部份) EX.pinMode(10, INPUT_PULLUP) 當SWOFF時D10為HIGH 當SWON時D10為LOW 實作1.

  4. digitalRead() • digitalRead(pin) • pin D0~D13 • 回傳值HIGH或LOW • 必需配合變數讀取回傳值，變數可為boolean或int形態 • booleantrue or false(1、0或HIGH 、LOW) • INT -32,768 to 32,767 ，使用digitalRead()回傳值為HIGH時為1 ， LOW時為0

  5. digitalWrite() • digitalWrite(pin, value) • pin D0~D13 • value為HIGH或LOW • I/O最大限制40mA 實作2.

  6. digitalWrite() • 實作3. • 輸出腳改到pin10，並使用300Ω限流電阻

  7. delay(ms) delayMicroseconds(us) • delay(ms) • ms :設定程式欲暫停執行的時間，單位為millisecond (0.001秒) • delayMicroseconds(us) • us: 設定程式欲暫停執行的時間，單位為microsecond (0.001ms) Ex.

  8. 變數型態

  9. millis() • 回傳Arduino晶片的時間計數值 • 按Reset或程式重載時歸零 • 回傳值為unsigned long型別 • 約50天後溢位歸零重數 • Ex. unsigned long timex ; timex =millis() ;

  10. If判斷式 • if (conditional)//判斷式 { // do something here } 判斷成立執行大括號內程式碼 • 判段式運算符 ==, !=, <, > • ==ex.if( val== HIGH ) • != ex.if( val!=HIGH ) • < ex.if( val< 5 ) • > ex.if( val>5 )

  11. 按鍵計數實作4-1

  12. 按鍵計數去抖動part1實作4-2 intledPin = 13; //LED intbuttonPin = 10; //buttonPin intval = 0; //按鍵計數值 booleanled_status =1;//LED狀態變數 booleanbtn_status;//按鍵狀態 void setup() { pinMode(ledPin,OUTPUT); pinMode(buttonPin,INPUT_PULLUP); } void loop() { btn_status=digitalRead(buttonPin);//讀取按鍵狀態 if(btn_status == LOW)//當按鍵被按下時 { delay(500);//暫停0.5秒避開抖動雜訊 val=val+1;//計數加1 if(val == 3)//當按下button3次時LED燈動作 { digitalWrite(ledPin,led_status);//LED輸出變換 val=0;//計數歸零 led_status = !led_status;//下次LED輸出狀態反相 } } }

  13. 按鍵計數去抖動part2實作5 • 取樣分析(加分題) 10~100次 ∞次 10~100次 5V 0V 雜訊區 >100ms 密集區 雜訊區 >100ms

  14. 7段顯示器(顯示0~9程式碼)實作6

  15. 顯示0~9程式碼實作6 10 6 8 7 9 1 4 2 3 10912467

  16. 顯示0~9程式碼實作6 void loop() { digitalWrite( 2 , seven_disp[i][0] ) ; digitalWrite( 3 , seven_disp[i][1] ) ; digitalWrite( 4 , seven_disp[i][2] ) ; digitalWrite( 5 , seven_disp[i][3] ) ; digitalWrite( 6 , seven_disp[i][4] ) ; digitalWrite( 7 , seven_disp[i][5] ) ; digitalWrite( 8 , seven_disp[i][6] ) ; delay(500); i=i+1; if(i==10) i=0; } byte seven_disp[10][7] = { { 1,1,1,1,1,1,0 }, // = 0 { 0,1,1,0,0,0,0 }, // = 1 { 1,1,0,1,1,0,1 }, // = 2 { 1,1,1,1,0,0,1 }, // = 3 { 0,1,1,0,0,1,1 }, // = 4 { 1,0,1,1,0,1,1 }, // = 5 { 1,0,1,1,1,1,1 }, // = 6 { 1,1,1,0,0,0,0 }, // = 7 { 1,1,1,1,1,1,1 }, // = 8 { 1,1,1,0,0,1,1 } // = 9 }; inti=0; void setup() { pinMode( 2, OUTPUT ); pinMode( 3, OUTPUT ); pinMode( 4, OUTPUT ); pinMode( 5, OUTPUT ); pinMode( 6, OUTPUT ); pinMode( 7, OUTPUT ); pinMode( 8, OUTPUT ); }

  17. 按鍵加一顯示0~9實作7 • 加分題 • 承上題七段顯示器，按一次按鍵數字加1

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