From 77a8c62b78a678fd7f6a2c91545783de0b3818ba Mon Sep 17 00:00:00 2001
From: Stephen Olesen <slepp@slepp.ca>
Date: Thu, 2 Jul 2015 19:57:32 -0600
Subject: [PATCH] Correct Pin 3 output to scale to the reduced comparator size.

---
 DDS.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/DDS.cpp b/DDS.cpp
index 6d86f80..eeaabb3 100644
--- a/DDS.cpp
+++ b/DDS.cpp
@@ -140,13 +140,13 @@ uint8_t DDS::getDutyCycle() {
   uint8_t phAng;
 #endif
   phAng = (accumulator >> ACCUMULATOR_BIT_SHIFT);
-  int8_t position = pgm_read_byte_near(ddsSineTable + phAng)>>(8-COMPARATOR_BITS);
+  int8_t position = pgm_read_byte_near(ddsSineTable + phAng); //>>(8-COMPARATOR_BITS);
   // Apply scaling and return
   int16_t scaled = position;
   // output = ((duty * amplitude) / 256) + 128
   // This keeps amplitudes centered around 50% duty
   scaled *= amplitude;
-  scaled >>= 8;
-  scaled += 128;
+  scaled >>= 8+(8-COMPARATOR_BITS);
+  scaled += 128>>(8-COMPARATOR_BITS);
   return scaled;
 }