From 6dab3f6777b47e077fecd5b27f5f316664dd6096 Mon Sep 17 00:00:00 2001
From: me-no-dev <hristo@espressif.com>
Date: Fri, 12 Apr 2019 17:49:44 +0200
Subject: [PATCH] Fix LEDC channels above 8 not properly clearing

Fixes: https://github.com/espressif/arduino-esp32/issues/2660
---
 cores/esp32/esp32-hal-ledc.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/cores/esp32/esp32-hal-ledc.c b/cores/esp32/esp32-hal-ledc.c
index b23a17db335..336d1efbb6b 100644
--- a/cores/esp32/esp32-hal-ledc.c
+++ b/cores/esp32/esp32-hal-ledc.c
@@ -167,7 +167,7 @@ static void _ledcSetupChannel(uint8_t chan, uint8_t idle_level)
     LEDC_CHAN(group, channel).conf0.sig_out_en = 0;//This is the output enable control bit for channel
     LEDC_CHAN(group, channel).conf1.duty_start = 0;//When duty_num duty_cycle and duty_scale has been configured. these register won't take effect until set duty_start. this bit is automatically cleared by hardware.
     if(group) {
-        LEDC_CHAN(group, channel).conf0.val &= ~BIT(4);
+        LEDC_CHAN(group, channel).conf0.low_speed_update = 1;
     } else {
         LEDC_CHAN(group, channel).conf0.clk_en = 0;
     }
@@ -196,7 +196,7 @@ void ledcWrite(uint8_t chan, uint32_t duty)
         LEDC_CHAN(group, channel).conf0.sig_out_en = 1;//This is the output enable control bit for channel
         LEDC_CHAN(group, channel).conf1.duty_start = 1;//When duty_num duty_cycle and duty_scale has been configured. these register won't take effect until set duty_start. this bit is automatically cleared by hardware.
         if(group) {
-            LEDC_CHAN(group, channel).conf0.val |= BIT(4);
+            LEDC_CHAN(group, channel).conf0.low_speed_update = 1;
         } else {
             LEDC_CHAN(group, channel).conf0.clk_en = 1;
         }
@@ -204,7 +204,7 @@ void ledcWrite(uint8_t chan, uint32_t duty)
         LEDC_CHAN(group, channel).conf0.sig_out_en = 0;//This is the output enable control bit for channel
         LEDC_CHAN(group, channel).conf1.duty_start = 0;//When duty_num duty_cycle and duty_scale has been configured. these register won't take effect until set duty_start. this bit is automatically cleared by hardware.
         if(group) {
-            LEDC_CHAN(group, channel).conf0.val &= ~BIT(4);
+            LEDC_CHAN(group, channel).conf0.low_speed_update = 1;
         } else {
             LEDC_CHAN(group, channel).conf0.clk_en = 0;
         }