Add analogRead, touchRead, dacWrite and updated esp-idf

cores/esp32/esp32-hal-dac.h

@@ -0,0 +1,35 @@
+/*
+ Arduino.h - Main include file for the Arduino SDK
+ Copyright (c) 2005-2013 Arduino Team.  All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef MAIN_ESP32_HAL_DAC_H_
+#define MAIN_ESP32_HAL_DAC_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "esp32-hal.h"
+
+void dacWrite(uint8_t pin, uint8_t value);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MAIN_ESP32_HAL_DAC_H_ */