From: Art Cancro <ajc@citadel.org>
Date: Fri, 25 Aug 2023 19:34:44 +0000 (-0400)
Subject: Experimental code to clean up the signal by averaging 1000 samples
X-Git-Url: https://code.citadel.org/?p=the_perfect_clock.git;a=commitdiff_plain;h=6e022cdc576d7b302584867bfc8f0d4fa90181e2

Experimental code to clean up the signal by averaging 1000 samples
---

diff --git a/the_perfect_clock.ino b/the_perfect_clock.ino
index 318d641..590a1c7 100644
--- a/the_perfect_clock.ino
+++ b/the_perfect_clock.ino
@@ -87,6 +87,27 @@ void setup() {
 // Note: only write to the display when the readout needs to be updated.
 // Speaking I2C on every loop iteration jams the WWVB receiver.
 void loop() {
+  int signal;
+  static int total_samples = 0;
+  static int high_samples = 0;
+
+  if (total_samples >= 1000) {
+    if (high_samples > 500) {
+      signal = HIGH;
+    }
+    else {
+      signal = LOW;
+    }
+    total_samples = 0;
+    high_samples = 0;
+  }
+  else {
+    total_samples += 1;
+    if (digitalRead(wwvb) == HIGH) {
+      ++high_samples;
+    }
+  }
+
 	unsigned long m = millis();
 	if (m != previous_millis) {
 		millisecond += (m - previous_millis);
@@ -101,11 +122,11 @@ void loop() {
 				}
 			}
 		}
-	}
+  }
 	previous_millis = m;
 
 	int pulse_length;
-	int signal = digitalRead(wwvb);				// is the input high or low right now?
+	//int signal = digitalRead(wwvb);				// is the input high or low right now?
 
   if (signal) {
     analogWrite(timecodeled, 10);       // it's too bright on my board so we dim it; change to digitalWrite() if not needed