From 3ff208c3e937d8172abd30367934506dd2265eaa Mon Sep 17 00:00:00 2001
From: ficeto <ficeto@Hristos-Mac-mini-2.local>
Date: Mon, 11 May 2015 14:28:37 +0300
Subject: [PATCH] add pwm freq adjustment

---
 cores/esp8266/Arduino.h                 | 1 +
 cores/esp8266/core_esp8266_wiring_pwm.c | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/cores/esp8266/Arduino.h b/cores/esp8266/Arduino.h
index 51aa65602..6db13a088 100644
--- a/cores/esp8266/Arduino.h
+++ b/cores/esp8266/Arduino.h
@@ -172,6 +172,7 @@ int digitalRead(uint8_t);
 int analogRead(uint8_t);
 void analogReference(uint8_t mode);
 void analogWrite(uint8_t, int);
+void analogWriteFreq(uint32_t freq);
 
 unsigned long millis(void);
 unsigned long micros(void);
diff --git a/cores/esp8266/core_esp8266_wiring_pwm.c b/cores/esp8266/core_esp8266_wiring_pwm.c
index 25ddceb2e..5552d53b4 100644
--- a/cores/esp8266/core_esp8266_wiring_pwm.c
+++ b/cores/esp8266/core_esp8266_wiring_pwm.c
@@ -139,4 +139,10 @@ extern void __analogWrite(uint8_t pin, int value) {
 	}
 }
 
+extern void __analogWriteFreq(uint32_t freq){
+  pwm_freq = freq;
+  prep_pwm_steps();
+}
+
 extern void analogWrite(uint8_t pin, int val) __attribute__ ((weak, alias("__analogWrite")));
+extern void analogWriteFreq(uint32_t freq) __attribute__ ((weak, alias("__analogWriteFreq")));