From d7bce9f7f6c4c9c2528a004c52468f01317aabf2 Mon Sep 17 00:00:00 2001
From: ocrdu <oscar@den-uijl.nl>
Date: Mon, 16 Dec 2019 20:07:30 +0100
Subject: [PATCH] Added an example

---
 examples/flame/flame.ino | 18 ++++++++++++++++++
 src/SAMD21turboPWM.cpp   |  2 +-
 2 files changed, 19 insertions(+), 1 deletion(-)
 create mode 100644 examples/flame/flame.ino

diff --git a/examples/flame/flame.ino b/examples/flame/flame.ino
new file mode 100644
index 0000000..991eef6
--- /dev/null
+++ b/examples/flame/flame.ino
@@ -0,0 +1,18 @@
+// Uses two orange LEDS plus resistors on pins 4 and 7 (on the Nano 33 IoT; change for other boards).
+// Don't pull more than 7mA from any pin.
+
+#include <SAMD21turboPWM.h>
+
+TurboPWM pwm;
+
+void setup() {
+  pwm.setClockDivider(1, false);
+  pwm.timer(1, 1, 1000, true);
+}
+
+void loop() {
+  pwm.analogWrite(4, random(500, 1000));
+  delay(25);
+  pwm.analogWrite(7, random(300, 1000));
+  delay(25);
+}
diff --git a/src/SAMD21turboPWM.cpp b/src/SAMD21turboPWM.cpp
index 7c95769..26755c5 100644
--- a/src/SAMD21turboPWM.cpp
+++ b/src/SAMD21turboPWM.cpp
@@ -61,7 +61,7 @@ int TurboPWM::timer(int timerNumber, unsigned int TCCDiv, unsigned long int sts,
     return 0;
   }
   
-  // Derive TCC prescaler from parameter TCCDiv; default to 4
+  // Derive TCC prescaler from parameter TCCDiv; default to last known setting
   unsigned int my_TCC_CTRLA_PRESCALER_DIV;
   if (TCCDiv == 1) {
     my_TCC_CTRLA_PRESCALER_DIV = TCC_CTRLA_PRESCALER_DIV1_Val << TCC_CTRLA_PRESCALER_Pos;