From 48cdf1ca48a6e03b4bf65249c2965b3aeab1a1e0 Mon Sep 17 00:00:00 2001
From: max30012540 <max30012540@hotmail.com>
Date: Thu, 18 May 2017 19:26:05 +0700
Subject: [PATCH] Remove LEDC_BASE_FREQ to calculate duty

---
 .../examples/AnalogOut/LEDCSoftwareFade/LEDCSoftwareFade.ino  | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libraries/ESP32/examples/AnalogOut/LEDCSoftwareFade/LEDCSoftwareFade.ino b/libraries/ESP32/examples/AnalogOut/LEDCSoftwareFade/LEDCSoftwareFade.ino
index aae974ace42..a4f2e5b41ba 100644
--- a/libraries/ESP32/examples/AnalogOut/LEDCSoftwareFade/LEDCSoftwareFade.ino
+++ b/libraries/ESP32/examples/AnalogOut/LEDCSoftwareFade/LEDCSoftwareFade.ino
@@ -28,8 +28,8 @@ int fadeAmount = 5;    // how many points to fade the LED by
 // Arduino like analogWrite
 // value has to be between 0 and valueMax
 void ledcAnalogWrite(uint8_t channel, uint32_t value, uint32_t valueMax = 255) {
-  // calculate duty
-  uint32_t duty = (LEDC_BASE_FREQ / valueMax) * min(value, valueMax);
+  // calculate duty, 8191 from 2 ^ 13 - 1
+  uint32_t duty = (8191 / valueMax) * min(value, valueMax);
 
   // write duty to LEDC
   ledcWrite(channel, duty);