From c8bf4347c22925bf2feac8dbbdd7246dd3766283 Mon Sep 17 00:00:00 2001
From: Asbelos <asbelos@btinternet.com>
Date: Sun, 27 Dec 2020 21:41:00 +0000
Subject: [PATCH] Update DCCWaveform.cpp (#109)

Anti-jitter
Prevents main track interrupt taking a variable time which causes prog track jitter.
---
 DCCWaveform.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/DCCWaveform.cpp b/DCCWaveform.cpp
index 123ba9e..9eb7022 100644
--- a/DCCWaveform.cpp
+++ b/DCCWaveform.cpp
@@ -188,13 +188,17 @@ bool DCCWaveform::interrupt1() {
         setSignal(LOW);
         state = 0;
       }
-      else state = 2;
+      else  {
+        setSignal(HIGH);  // jitter prevention
+        state = 2;
+      }
       break;
     case 2:  // 116us after case 0
       setSignal(LOW);
       state = 3;
       break;
     case 3:  // finished sending zero bit
+      setSignal(LOW);  // jitter prevention
       state = 0;
       break;
   }