Update

README.md

@@ -1,6 +1,6 @@
 # Oscilloscope Serial
 
-A simple oscilloscope application that reads the values in the serial that generated by an Arduino board based on the value of the analog pin A0
+A simple oscilloscope application that reads the values at serial port generated by an Arduino board and based on the value of the analog pin A0
 
 <p align="center"><img src="./images/img1.png" width="600"><br>
   <i>Main window</i><br><br></p>

src/arduino/oscilloscope/oscilloscope.ino

@@ -1,31 +1,27 @@
-//uint8_t val = 5;
+#define FREQ 100 // HZ
+#define DUTY 0.5 // %/100
 
 #define MS_TO_COMP(SCALER) (F_CPU / (SCALER * 1000.0))
 
 void setup() {
-  pinMode(A0, INPUT);
-  Serial.begin(1000000);
-  //DDRB |= _BV(DDB3);
-  //TCCR2A = _BV(COM2A1) | _BV(COM2A0) | _BV(WGM21) | _BV(WGM20);
-  //TCCR2B = _BV(WGM22) | _BV(CS22)| _BV(CS21) | _BV(CS20);
-  //OCR2A = 120;
-
-  DDRB |= _BV(DDB2);
-  TCCR1A = _BV(WGM11) | _BV(WGM10);
-  TCCR1B = _BV(WGM13) | _BV(WGM12) | _BV(CS11); // scaler 8
-
-  TCCR1A |= _BV(COM1B1);
-  OCR1A = 10 * MS_TO_COMP(8);
-  OCR1B = 0.5 * OCR1A;
-  
+    pinMode(A0, INPUT);
+    Serial.begin(1000000);
+    
+    // PWM 100Hz, 50% DUTY, PIN B2
+    DDRB |= _BV(DDB2);
+    TCCR1A = _BV(WGM11) | _BV(WGM10);
+    TCCR1B = _BV(WGM13) | _BV(WGM12) | _BV(CS11); // scaler 8
+    TCCR1A |= _BV(COM1B1);
+    OCR1A = 1000 / 100 * MS_TO_COMP(8);
+    OCR1B = 0.5 * OCR1A;
 }
 
 void loop() {
-  static uint16_t ts = 0;
-  if ((uint16_t)micros() - ts > 100)
-  {
-    ts = micros();
-    uint8_t val = analogRead(A0) >> 2; 
-    Serial.write(val);
-  }
+    static uint16_t ts = 0;
+    if ((uint16_t)micros() - ts > 100)
+    {
+        ts = micros();
+        uint8_t val = analogRead(A0) >> 2;
+        Serial.write(val);
+    }
 }