From bc6dd3857f76e7b21ecde8f363bf0a3f227df3b5 Mon Sep 17 00:00:00 2001
From: David Crocker <dcrocker@eschertech.com>
Date: Wed, 21 Apr 2021 20:57:11 +0100
Subject: [PATCH] Fixed issue with low PWM frequencies causing excessive CPU
 utilisation

---
 src/SAME5x_C21/AnalogOut.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/SAME5x_C21/AnalogOut.cpp b/src/SAME5x_C21/AnalogOut.cpp
index 448a363e..c8e5e721 100644
--- a/src/SAME5x_C21/AnalogOut.cpp
+++ b/src/SAME5x_C21/AnalogOut.cpp
@@ -129,8 +129,9 @@ namespace AnalogOut
 			else
 			{
 				// Just update the compare register
+				// Don't call hri_tccount16_write_CCBUF_CCBUF_bf here! It loops for up to one TC period waiting for sync.
 				const uint16_t cc = ConvertRange(val, tcTop[device]);
-				hri_tccount16_write_CCBUF_CCBUF_bf(tcdev, output, cc);
+				tcdev->COUNT16.CCBUF[output].bit.CCBUF = cc;
 			}
 
 			SetPinFunction(pin, peri);