Update prova.ino

prova.ino

@@ -1,94 +1,94 @@
-#define samples 15
+#define samples 200
-
+
-uint8_t state, old_state, initial;
+uint8_t state, old_state, initial;
-uint8_t changed[samples];
+uint8_t changed[samples];
-uint32_t timer[samples];
+uint32_t timer[samples];
-uint16_t event = 0;
+uint16_t event = 0;
-
+
-volatile uint64_t overflow_count = 0;
+volatile uint64_t overflow_count = 0;
-volatile uint64_t total_count = 0;
+volatile uint64_t total_count = 0;
-
+
-
+
-int main(void) {
+int main(void) {
-  Serial.begin(9600);
+  Serial.begin(9600);
-
+
-  TCCR2B = TCCR2B & 0b11111000 | 0x02;
+  TCCR2B = TCCR2B & 0b11111000 | 0x02;
-  TIMSK2 |= (1 << TIMSK2);  // enable Timer2 overflow interrupt
+  TIMSK2 |= (1 << TIMSK2);  // enable Timer2 overflow interrupt
-  TCCR2A &= 0b11111100;     // timer2 working parameters
+  TCCR2A &= 0b11111100;     // timer2 working parameters
-  TCCR2B &= 0b11110111;
+  TCCR2B &= 0b11110111;
-
+
-  PORTC = (0 << 0); DDRC |= (1 << 0); // led A0
+  PORTC = (0 << 0); DDRC |= (1 << 0); // led A0
-  DDRB |= 0x00;     // pin 8-13 input
+  DDRB |= 0x00;     // pin 8-13 input
-  PORTB |= 0x3F;    // pull-up
+  PORTB |= 0x3F;    // pull-up
-
+
-  start();
+  start();
-
+
-  while (1) {
+  while (1) {
-    old_state = state;
+    old_state = state;
-    state = PINB;
+    state = PINB;
-
+
-    if (old_state != state) {
+    if (old_state != state) {
-      timer[event] = get_time();
+      timer[event] = get_time();
-      changed[event] = old_state ^ state;
+      changed[event] = old_state ^ state;
-      event++;
+      event++;
-
+
-      if (event == samples) {
+      if (event == samples) {
-        sendData();
+        sendData();
-        while (Serial.read() != 'G') ; //wait for the "go"
+        while (Serial.read() != 'G') ; //wait for the "go"
-        start();
+        start();
-      }
+      }
-    }
+    }
-  }
+  }
-}
+}
-
+
-void start() {
+void start() {
-  _delay_ms(1000);
+  _delay_ms(1000);
-
+
-  TCNT2 = 0;
+  TCNT2 = 0;
-  overflow_count = 0;
+  overflow_count = 0;
-  event = 0;
+  event = 0;
-
+
-  PORTC = (1 << 0);
+  PORTC = (1 << 0);
-  initial = PINB;
+  initial = PINB;
-  state = initial;
+  state = initial;
-
+
-  //in futuro potrei fare in modo che time[0] è impostato qui
+  //in futuro potrei fare in modo che time[0] è impostato qui
-}
+}
-
+
-
+
-void sendData() {
+void sendData() {
-  PORTC = (0 << 0);   //turn off led
+  PORTC = (0 << 0);   //turn off led
-
+
-  //initial data
+  //initial data
-  Serial.print("S"); Serial.println("");
+  Serial.print("S"); Serial.println("");
-  Serial.print(initial); Serial.print(":");
+  Serial.print(initial); Serial.print(":");
-  Serial.println(samples);
+  Serial.println(samples);
-
+
-  //data
+  //data
-  for (int i = 0; i < samples; i++) {
+  for (int i = 0; i < samples; i++) {
-    Serial.print(changed[i]); Serial.print(":");
+    Serial.print(changed[i]); Serial.print(":");
-    Serial.println(timer[i]);
+    Serial.println(timer[i]);
-  }
+  }
-}
+}
-
+
-
+
-//timer:
+//timer:
-uint32_t get_time() {
+uint32_t get_time() {
-  cli();
+  cli();
-  uint8_t tcnt2_save = TCNT2;
+  uint8_t tcnt2_save = TCNT2;
-  boolean flag_save = TIMSK2 & (1 << TIFR2); //timer2 overflow flag
+  boolean flag_save = TIMSK2 & (1 << TIFR2); //timer2 overflow flag
-
+
-  if (flag_save) {
+  if (flag_save) {
-    tcnt2_save = TCNT2;
+    tcnt2_save = TCNT2;
-    overflow_count++;     //manual increment of the overflow counter
+    overflow_count++;     //manual increment of the overflow counter
-    TIFR2 = (1 << TIFR2); //reset overflow flag to prevent execution of the ISR
+    TIFR2 = (1 << TIFR2); //reset overflow flag to prevent execution of the ISR
-  }
+  }
-
+
-  total_count = (overflow_count * 256 + tcnt2_save) / 2;
+  total_count = (overflow_count * 256 + tcnt2_save) / 2;
-  sei();
+  sei();
-  return total_count;
+  return total_count;
-}
+}
-
+
-ISR(TIMER2_OVF_vect) {
+ISR(TIMER2_OVF_vect) {
-  overflow_count++;
+  overflow_count++;
 }