Removed all the button start/stop logic

Author: dplassgit

vg4_keyboard/logic_analyzer/logic_analyzer.ino

@@ -1,21 +1,15 @@
 /*
- * Simple logic analyzer. Triggers when the data pin goes low.
- * Records bits until 30  1's in a row are received.
- * Attemps to debounce the button (poorly). Resets the board
- * (reset pin low) when the button is pressed, and starts listening.
- * 
- * Based on http://www.arduino.cc/en/Tutorial/Button
+   Simple logic analyzer. Triggers when the data pin goes low.
+   Records bits until 30  1's in a row are received.
 */
 
-const int buttonPin = 7;     // the number of the pushbutton pin
 const int dataPin = 2;      // corresponds to pin 6 on the KB connector (and pin 6 of the RJ12)
 const int resetPin = 5;     // corresponds to pin 2 on the KB connector (and pin 4 on the RJ12)
 
-int buttonState = 0;         // variable for reading the pushbutton status
+int changed = 0;
 
 void setup() {
   pinMode(LED_BUILTIN, OUTPUT);
-  pinMode(buttonPin, INPUT);
   pinMode(resetPin, OUTPUT);
   pinMode(dataPin, INPUT);
 
@@ -28,57 +22,32 @@ void setup() {
   Serial.println("Hello logic_analyzer");
 }
 
-int changed = 0;
-int shouldRead = 0;
 int data = 0;
 int inKey = 0;  // are we reading a key?
 int numOnes = 0;  // the # of 1s in a row
 
 void loop() {
-  // read the state of the pushbutton value:
-  buttonState = digitalRead(buttonPin);
-
-  // check if the pushbutton is pressed. If it is, the buttonState is HIGH:
-  if (buttonState == HIGH && !changed) {
-    // turn LED on, and toggle recording.
+  data = digitalRead(dataPin);
+  if (data == LOW && !inKey) {
+    inKey = 1; // we're recording until numones==30
+    numOnes = 0;
+    Serial.println("START");
+    Serial.println("0");
     digitalWrite(LED_BUILTIN, HIGH);
-    Serial.println("on");
-    shouldRead = 1 - shouldRead;
-    Serial.print("ShouldRead is "); Serial.println(shouldRead);
-    changed = 1;
-  } else if (buttonState == LOW && changed) {
-    // turn LED off:
-    digitalWrite(LED_BUILTIN, LOW);
-    Serial.println("off");
-    changed = 0;
- 
-    // beep/reset, and keep reading.
-    digitalWrite(resetPin , LOW);
-    delay(10);
-    digitalWrite(resetPin , HIGH);
-  }
-
-  if (shouldRead == 1) {
-    data = digitalRead(dataPin);
-    if (data == LOW && !inKey) {
-      inKey=1;  // we're recording until numones==30
-      numOnes=0;
-      Serial.println("START");
-      Serial.println("0");
-    } else if (inKey) {
-      if (data == HIGH) {
-        Serial.println("1");
-        numOnes++;
-        if (numOnes == 30) {
-          inKey=0;
-          numOnes=0;
-          Serial.println("END");
-          delay(500);
-        }
-      } else {
-        numOnes=0;
-        Serial.println("0");
+  } else if (inKey) {
+    if (data == HIGH) {
+      Serial.println("1");
+      numOnes++;
+      if (numOnes == 30) {
+        inKey = 0;
+        numOnes = 0;
+        digitalWrite(LED_BUILTIN, LOW);
+        Serial.println("END");
+        delay(500);
       }
+    } else {
+      numOnes = 0;
+      Serial.println("0");
     }
   }
 }