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Recupération d'un afficheur LED à décalage : Différence entre versions

De HATLAB
 
(6 révisions intermédiaires par le même utilisateur non affichées)
Ligne 2 : Ligne 2 :
 
|Type=Technique
 
|Type=Technique
 
|Area=Électronique
 
|Area=Électronique
−
|Tags=Registre à décalage, affichage, LED, 7 segments, display, Réutilisation, Récupération, HC164,
+
|Tags=Registre à décalage, affichage, LED, 7 segments, display, Réutilisation, Récupération, HC164, carte-arduino
 
|Description=Réutiliser un afficheur LED digital pour des projets Arduino. Exemple avec 4 registres à décalage HC164
 
|Description=Réutiliser un afficheur LED digital pour des projets Arduino. Exemple avec 4 registres à décalage HC164
 
|Difficulty=Facile
 
|Difficulty=Facile
Ligne 111 : Ligne 111 :
 
|Step_Title=Le Code
 
|Step_Title=Le Code
 
|Step_Content=<code>
 
|Step_Content=<code>
−
<pre style='color:#000000;background:#ffffff;'><span style='color:#004a43; '>#</span><span style='color:#004a43; '>define</span><span style='color:#004a43; '> data 2</span>
+
; #define data 2
−
<span style='color:#004a43; '>#</span><span style='color:#004a43; '>define</span><span style='color:#004a43; '> clock 3    </span><span style='color:#696969; '>//D PWM</span>
+
; #define clock 3; //D PWM
 +
;
 +
;void setup()
 +
;{
 +
;;;pinMode(clock, OUTPUT); // make the clock pin an output
 +
;;;pinMode(data , OUTPUT); // make the data pin an output
 +
; }
  
−
<span style='color:#696969; '>/*</span>
+
;void loop() {
−
<span style='color:#696969; '>&#xa0;* CHILLER DISP Rev 0.0</span>
+
;;;// put your main code here, to run repeatedly:
−
<span style='color:#696969; '>&#xa0;&#xa0;LED Display:    ___</span>
 
−
<span style='color:#696969; '>&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;6! 1 !2</span>
 
−
<span style='color:#696969; '>&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;!  !</span>
 
−
<span style='color:#696969; '>&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;---</span>
 
−
<span style='color:#696969; '>&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;! 7 !</span>
 
−
<span style='color:#696969; '>&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;5!  !3</span>
 
−
<span style='color:#696969; '>&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;---</span>
 
−
<span style='color:#696969; '>&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;8°  4        bits: 12345678</span>
 
−
<span style='color:#696969; '>&#xa0;&#xa0;Connectors:</span>
 
−
<span style='color:#696969; '>&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;CON3</span>
 
−
<span style='color:#696969; '>&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;GND GND GND  </span>
 
−
<span style='color:#696969; '>&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;SW2            DATA</span>
 
−
<span style='color:#696969; '>&#xa0;&#xa0;&#xa0;CON2 SW1              GND  CON1 </span>
 
−
<span style='color:#696969; '>&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;CLK              +5V</span>
 
−
<span style='color:#696969; '></span>
 
−
<span style='color:#696969; '>&#xa0;*/</span>
 
  
−
<span style='color:#800000; font-weight:bold; '>unsigned</span> <span style='color:#800000; font-weight:bold; '>int</span> cnt <span style='color:#808030; '>=</span> <span style='color:#008c00; '>0</span><span style='color:#800080; '>;</span>
 
−
byte symbol<span style='color:#808030; '>,</span> symbols<span style='color:#808030; '>[</span><span style='color:#808030; '>]</span> <span style='color:#808030; '>=</span> <span style='color:#800080; '>{</span>
 
−
B11111100<span style='color:#808030; '>,</span> <span style='color:#696969; '>// 0</span>
 
−
B01100000<span style='color:#808030; '>,</span> <span style='color:#696969; '>// 1</span>
 
−
B11011010<span style='color:#808030; '>,</span> <span style='color:#696969; '>// 2</span>
 
−
B11110010<span style='color:#808030; '>,</span> <span style='color:#696969; '>// 3</span>
 
−
B01100110<span style='color:#808030; '>,</span> <span style='color:#696969; '>// 4</span>
 
−
B10110110<span style='color:#808030; '>,</span> <span style='color:#696969; '>// 5</span>
 
−
B10111110<span style='color:#808030; '>,</span> <span style='color:#696969; '>// 6</span>
 
−
B11100000<span style='color:#808030; '>,</span> <span style='color:#696969; '>// 7</span>
 
−
B11111110<span style='color:#808030; '>,</span> <span style='color:#696969; '>// 8</span>
 
−
B11110110<span style='color:#808030; '>,</span> <span style='color:#696969; '>// 9</span>
 
−
B11101110<span style='color:#808030; '>,</span> <span style='color:#696969; '>// A</span>
 
−
B00111110<span style='color:#808030; '>,</span> <span style='color:#696969; '>// B</span>
 
−
B10011100<span style='color:#808030; '>,</span> <span style='color:#696969; '>// C</span>
 
−
B01111010<span style='color:#808030; '>,</span> <span style='color:#696969; '>// D</span>
 
−
B10011110<span style='color:#808030; '>,</span> <span style='color:#696969; '>// E</span>
 
−
B10001110<span style='color:#808030; '>,</span> <span style='color:#696969; '>// F</span>
 
−
B00011100<span style='color:#808030; '>,</span> <span style='color:#696969; '>// L</span>
 
−
B00101010<span style='color:#808030; '>,</span> <span style='color:#696969; '>// M</span>
 
−
B11000110<span style='color:#808030; '>,</span> <span style='color:#696969; '>// °</span>
 
−
B01001010  <span style='color:#696969; '>// %</span>
 
−
<span style='color:#800080; '>}</span><span style='color:#800080; '>;</span>
 
  
 +
;;;shiftOut(data, clock, LSBFIRST, B00000000); // send this binary value to the shift register
 +
;;;shiftOut(data, clock, LSBFIRST, B00000000); // send this binary value to the shift register
 +
;;;shiftOut(data, clock, LSBFIRST, B00000000); // send this binary value to the shift register
 +
;;;shiftOut(data, clock, LSBFIRST, B00000000); // send this binary value to the shift register
 +
;;;delay(1000);;;
 +
;;;shiftOut(data, clock, LSBFIRST, B00000001); // send this binary value to the shift register
 +
;;;shiftOut(data, clock, LSBFIRST, B00000010); // send this binary value to the shift register
 +
;;;shiftOut(data, clock, LSBFIRST, B00000100); // send this binary value to the shift register
 +
;;;shiftOut(data, clock, LSBFIRST, B00001000); // send this binary value to the shift register
 +
;;;delay(1000);;;
 +
;;;shiftOut(data, clock, LSBFIRST, B00010000); // send this binary value to the shift register
 +
;;;shiftOut(data, clock, LSBFIRST, B00100000); // send this binary value to the shift register
 +
;;;shiftOut(data, clock, LSBFIRST, B01000000); // send this binary value to the shift register
 +
;;;shiftOut(data, clock, LSBFIRST, B10000000); // send this binary value to the shift register
 +
;;;delay(1000);;;
 +
;;;shiftOut(data, clock, LSBFIRST, B00000000); // send this binary value to the shift register
 +
;;;shiftOut(data, clock, LSBFIRST, B00000000); // send this binary value to the shift register
 +
;;;shiftOut(data, clock, LSBFIRST, B00000000); // send this binary value to the shift register
 +
;;;shiftOut(data, clock, LSBFIRST, B00000000); // send this binary value to the shift register
  
 +
;;;delay(1000);;;
  
 +
;;;shiftOut(data, clock, LSBFIRST, B10101010); // send this binary value to the shift register
 +
;;;delay(1000);
  
 +
; for(int i = 0; i < 4; ++i) //for 0 - 7 do
 +
;;;{
 +
;;;;;shiftOut(data, clock, LSBFIRST, B01010101); // bit shift a logic high (1) value by i
 +
;;;;;delay(500); // delay 100ms or you would not be able to see it
 +
;;;}
 +
;;;delay(1000);
  
−
<span style='color:#800000; font-weight:bold; '>void</span> setup<span style='color:#808030; '>(</span><span style='color:#808030; '>)</span>
+
;}
−
<span style='color:#800080; '>{</span>
 
−
  pinMode<span style='color:#808030; '>(</span><span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> OUTPUT<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// make the clock pin an output</span>
 
−
  pinMode<span style='color:#808030; '>(</span>data <span style='color:#808030; '>,</span> OUTPUT<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// make the data pin an output</span>
 
−
<span style='color:#800080; '>}</span>
 
−
 
 
−
<span style='color:#800000; font-weight:bold; '>void</span> loop<span style='color:#808030; '>(</span><span style='color:#808030; '>)</span> <span style='color:#800080; '>{</span>
 
−
  <span style='color:#696969; '>// put your main code here, to run repeatedly:</span>
 
−
 
 
−
 
 
−
  shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B00000000<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// send this binary value to the shift register</span>
 
−
  shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B00000000<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// send this binary value to the shift register</span>
 
−
  shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B00000000<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// send this binary value to the shift register</span>
 
−
  shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B00000000<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// send this binary value to the shift register</span>
 
−
  delay<span style='color:#808030; '>(</span><span style='color:#008c00; '>1000</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> 
 
−
  shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B00000001<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// send this binary value to the shift register</span>
 
−
  shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B00000010<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// send this binary value to the shift register</span>
 
−
  shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B00000100<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// send this binary value to the shift register</span>
 
−
  shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B00001000<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// send this binary value to the shift register</span>
 
−
  delay<span style='color:#808030; '>(</span><span style='color:#008c00; '>1000</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> 
 
−
  shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B00010000<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// send this binary value to the shift register</span>
 
−
  shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B00100000<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// send this binary value to the shift register</span>
 
−
  shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B01000000<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// send this binary value to the shift register</span>
 
−
  shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B10000000<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// send this binary value to the shift register</span>
 
−
  delay<span style='color:#808030; '>(</span><span style='color:#008c00; '>1000</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> 
 
−
  shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B00000000<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// send this binary value to the shift register</span>
 
−
  shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B00000000<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// send this binary value to the shift register</span>
 
−
  shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B00000000<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// send this binary value to the shift register</span>
 
−
  shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B00000000<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// send this binary value to the shift register</span>
 
−
 
 
−
  delay<span style='color:#808030; '>(</span><span style='color:#008c00; '>1000</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> 
 
−
 
 
−
  shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B10101010<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// send this binary value to the shift register</span>
 
−
  delay<span style='color:#808030; '>(</span><span style='color:#008c00; '>1000</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
 
−
 
 
−
<span style='color:#800000; font-weight:bold; '>for</span><span style='color:#808030; '>(</span><span style='color:#800000; font-weight:bold; '>int</span> i <span style='color:#808030; '>=</span> <span style='color:#008c00; '>0</span><span style='color:#800080; '>;</span> i <span style='color:#808030; '>&lt;</span> <span style='color:#008c00; '>4</span><span style='color:#800080; '>;</span> <span style='color:#808030; '>+</span><span style='color:#808030; '>+</span>i<span style='color:#808030; '>)</span> <span style='color:#696969; '>//for 0 - 7 do</span>
 
−
  <span style='color:#800080; '>{</span>
 
−
    shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B01010101<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// bit shift a logic high (1) value by i</span>
 
−
    delay<span style='color:#808030; '>(</span><span style='color:#008c00; '>500</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// delay 100ms or you would not be able to see it</span>
 
−
  <span style='color:#800080; '>}</span>
 
−
  delay<span style='color:#808030; '>(</span><span style='color:#008c00; '>1000</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
 
−
 
 
−
<span style='color:#800000; font-weight:bold; '>for</span><span style='color:#808030; '>(</span><span style='color:#800000; font-weight:bold; '>int</span> i <span style='color:#808030; '>=</span> <span style='color:#008c00; '>0</span><span style='color:#800080; '>;</span> i <span style='color:#808030; '>&lt;</span> <span style='color:#008c00; '>4</span><span style='color:#800080; '>;</span> <span style='color:#808030; '>+</span><span style='color:#808030; '>+</span>i<span style='color:#808030; '>)</span> <span style='color:#696969; '>//for 0 - 7 do</span>
 
−
  <span style='color:#800080; '>{</span>
 
−
    shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> B10101010<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// bit shift a logic high (1) value by i</span>
 
−
    delay<span style='color:#808030; '>(</span><span style='color:#008c00; '>500</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// delay 100ms or you would not be able to see it</span>
 
−
  <span style='color:#800080; '>}</span>
 
−
 
 
−
  delay<span style='color:#808030; '>(</span><span style='color:#008c00; '>1500</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
 
−
 
 
−
<span style='color:#800000; font-weight:bold; '>for</span><span style='color:#808030; '>(</span><span style='color:#800000; font-weight:bold; '>int</span> i <span style='color:#808030; '>=</span> <span style='color:#008c00; '>0</span><span style='color:#800080; '>;</span> i <span style='color:#808030; '>&lt;</span> <span style='color:#008c00; '>12</span><span style='color:#800080; '>;</span> <span style='color:#808030; '>+</span><span style='color:#808030; '>+</span>i<span style='color:#808030; '>)</span> <span style='color:#696969; '>//for 0 - 7 do</span>
 
−
  <span style='color:#800080; '>{</span>
 
−
    shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> MSBFIRST<span style='color:#808030; '>,</span> <span style='color:#008c00; '>1</span> <span style='color:#808030; '>&lt;</span><span style='color:#808030; '>&lt;</span> i <span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// bit shift a logic high (1) value by i</span>
 
−
    delay<span style='color:#808030; '>(</span><span style='color:#008c00; '>300</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// delay 100ms or you would not be able to see it</span>
 
−
  <span style='color:#800080; '>}</span>
 
−
 
 
−
  delay<span style='color:#808030; '>(</span><span style='color:#008c00; '>1000</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
 
−
 
 
−
 
 
−
<span style='color:#800000; font-weight:bold; '>for</span><span style='color:#808030; '>(</span><span style='color:#800000; font-weight:bold; '>int</span> i <span style='color:#808030; '>=</span> <span style='color:#008c00; '>0</span><span style='color:#800080; '>;</span> i <span style='color:#808030; '>&lt;</span> <span style='color:#008c00; '>19</span><span style='color:#800080; '>;</span> <span style='color:#808030; '>+</span><span style='color:#808030; '>+</span>i<span style='color:#808030; '>)</span> <span style='color:#696969; '>// counter 0 to F puis -> %</span>
 
−
  <span style='color:#800080; '>{</span>
 
−
  cnt<span style='color:#808030; '>=</span>i<span style='color:#800080; '>;</span>
 
−
  symbol <span style='color:#808030; '>=</span> symbols<span style='color:#808030; '>[</span>cnt<span style='color:#808030; '>+</span><span style='color:#808030; '>+</span><span style='color:#808030; '>%</span><span style='color:#800000; font-weight:bold; '>sizeof</span><span style='color:#808030; '>(</span>symbols<span style='color:#808030; '>)</span><span style='color:#808030; '>]</span> <span style='color:#808030; '></span> <span style='color:#808030; '>(</span>cnt<span style='color:#808030; '>%</span><span style='color:#008c00; '>2</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
 
−
  shiftOut<span style='color:#808030; '>(</span>data<span style='color:#808030; '>,</span> <span style='color:#603000; '>clock</span><span style='color:#808030; '>,</span> LSBFIRST<span style='color:#808030; '>,</span> symbol<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// send data</span>
 
−
  delay<span style='color:#808030; '>(</span><span style='color:#008c00; '>500</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span> <span style='color:#696969; '>// pause for 1/2 second</span>
 
−
  <span style='color:#800080; '>}</span>
 
−
 
 
−
 
 
−
<span style='color:#800080; '>}</span>
 
−
</pre>
 
 
</code>
 
</code>
 
}}
 
}}
 
{{Notes}}
 
{{Notes}}
 
{{Tuto Status}}
 
{{Tuto Status}}

Version actuelle datée du 22 avril 2022 à 21:12

Une Technique de avatarSylvain dans les catégories Électronique. Dernière modification le 22/04/2022 par Sgiraud.

Recup ration d un afficheur LED d calage HC164-Nano-top.jpg

Réutiliser un afficheur LED digital pour des projets Arduino. Exemple avec 4 registres à décalage HC164

Difficulté
Facile
Durée
1 heure(s)
Coût
2 EUR (€)
Licence : Attribution (CC BY)

Recup ration d un afficheur LED d calage HC164-Nano-top.jpg

Introduction

Il est courant de trouver dans les bacs de récupération des afficheurs 7 segments LED avec registre à décalage. La connexion à ses afficheurs est simple, elle n'a besoin que de 2 fils: clock et data. L'Arduino est parfaitement adapté pour générer les bons signaux.

Liste des matériaux

  • 1 Display à LED 7 segment et Registre à décalage
  • Des fils avec connecteurs

Liste des outils

  • 1 fer à souder
  • De quoi dessouder ou couper une connexion
  • 1 Arduino Nano
  • 1 Testeur (Voltmètre/Ohmmètre)
  • En option 1 shield Nano

Etape n°1 - Récupérer le display

Par exemple, ici, le display provient d'une carte de climatiseur. Il y a 4 x 8 segments, avec 3 x 3 connecteurs bien visibles. Le 8ieme segment correspond au point après chaque chiffre. On ne voit pas les registres, mais il y en a très probablement puisqu'il n'y a que 7 connecteurs (hors masse et alimentation) pour 32 segments.

Reste à dessouder les 9 connecteurs, ou (plus rapide) les couper à la pince.

Etape n°2 - Trouver les registres à décalages

Il y a bien 4 chips derrière, qui correspondent à chacun des chiffres de l'afficheur. Après nettoyage et avec une bonne loupe, on arrive à lire "HC164". C'est une registre à décalage très courant et simple.

La doc est facile à trouver (voir ci-joint) et le principe simple:

  • A chaque transition sur le pin CLK (Clock)
  • La valeur en entrée DATA est "poussée" dans le registre et décale les 8 bits qui y étaient déjà.
  • Le 8ieme bit est chainé sur l'entrée DATA du registre suivant
  • Ainsi, après 8 x 4 = 32 transitions, tous les bits des 4 display sont valorisés.

Etape n°3 - Recherche de la masse

La carte est multi-couches, donc assez compliqué de s'y retrouver dans le circuit. En testant la connectivité entre les connecteurs, 4 connecteurs s'avèrent en lien direct (résistance nulle): les 3 du haut (CON3) et celui au centre à droite (CON1). Ceux-ci sont visiblement connectés sur le circuit à de grandes surfaces conductrices qui est très probablement la masse.

Etape n°4 - Recherche de l'alimentation +5V

Plus simple qu'il n'y parait: en général sur le circuit, le VCC est visualisé par une gravure "carrée". Justement, il y a un lien entre un carré sur le circuit et le connecteur le plus bas du CON1.

On peut alimenter ! Les LED vont s'afficher un peu au hasard au gré des mauvais contacts et parasites.

Victoire!

Etape n°5 - Recherche du Clk et Data

Plusieurs méthodes:

  • Suivre les circuits CLK et DATA qui partent des HC164: L'idéal serait de pouvoir suivre les circuits visuellement, mais sur cette carte multi-couches c'est très difficile.
  • Utiliser l'ohmètre pour trouver les liens avec les connecteurs: Pas de chance, aucun lien direct.
  • Par élimination: On peut ignorer les 2 connecteurs du haut de CON 2: ceux-ci sont reliés aux interrupteurs sous le display.

Ainsi, il ne reste que 2 candidats: en haut du CON1 et en bas du CON2.

Avec un fil, connecter au + l'un des 2 pins. Le Data n'affiche rien. Mais le Clock fait avancer les segments de gauche à droite.

On a maintenant les 2 pins: voir la photo.

Etape n°6 - Connexion à l'Arduino

On peut connecter à l'Arduino, par exemple:

  • GND -> GND
  • CON+ -> VCC
  • CLK -> Pin D3 (PWM)
  • DATA -> Pin 2

Voici un exemple de code qui permet de contrôler totalement l'affichage.

Et voilà! Plus besoin de commander un nouvel afficheur au bout du monde...

Etape n°7 - Le Code

#define data 2
#define clock 3; //D PWM
void setup()
{
pinMode(clock, OUTPUT); // make the clock pin an output
pinMode(data , OUTPUT); // make the data pin an output
}
void loop() {
// put your main code here, to run repeatedly


shiftOut(data, clock, LSBFIRST, B00000000); // send this binary value to the shift register
shiftOut(data, clock, LSBFIRST, B00000000); // send this binary value to the shift register
shiftOut(data, clock, LSBFIRST, B00000000); // send this binary value to the shift register
shiftOut(data, clock, LSBFIRST, B00000000); // send this binary value to the shift register
delay(1000);;;
shiftOut(data, clock, LSBFIRST, B00000001); // send this binary value to the shift register
shiftOut(data, clock, LSBFIRST, B00000010); // send this binary value to the shift register
shiftOut(data, clock, LSBFIRST, B00000100); // send this binary value to the shift register
shiftOut(data, clock, LSBFIRST, B00001000); // send this binary value to the shift register
delay(1000);;;
shiftOut(data, clock, LSBFIRST, B00010000); // send this binary value to the shift register
shiftOut(data, clock, LSBFIRST, B00100000); // send this binary value to the shift register
shiftOut(data, clock, LSBFIRST, B01000000); // send this binary value to the shift register
shiftOut(data, clock, LSBFIRST, B10000000); // send this binary value to the shift register
delay(1000);;;
shiftOut(data, clock, LSBFIRST, B00000000); // send this binary value to the shift register
shiftOut(data, clock, LSBFIRST, B00000000); // send this binary value to the shift register
shiftOut(data, clock, LSBFIRST, B00000000); // send this binary value to the shift register
shiftOut(data, clock, LSBFIRST, B00000000); // send this binary value to the shift register
delay(1000);;;
shiftOut(data, clock, LSBFIRST, B10101010); // send this binary value to the shift register
delay(1000);
for(int i = 0; i < 4; ++i) //for 0 - 7 do
{
shiftOut(data, clock, LSBFIRST, B01010101); // bit shift a logic high (1) value by i
delay(500); // delay 100ms or you would not be able to see it
}
delay(1000);
}

Notes et références

Récupérée de « https://wikifab.hatlab.fr/index.php?title=Recupération_d%27un_afficheur_LED_à_décalage&oldid=2964 »

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