Add analogRead, touchRead, dacWrite and updated esp-idf

cores/esp32/esp32-hal-touch.h

@@ -0,0 +1,56 @@
+/*
+ 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_TOUCH_H_
+#define MAIN_ESP32_HAL_TOUCH_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "esp32-hal.h"
+
+/*
+ * Set cycles that measurement operation takes
+ * The result from touchRead, threshold and detection
+ * accuracy depend on these values. Defaults are
+ * 0x1000 for measure and 0x1000 for sleep.
+ * With default values touchRead takes 0.5ms
+ * */
+void touchSetCycles(uint16_t measure, uint16_t sleep);
+
+/*
+ * Read touch pad (values close to 0 mean touch detected)
+ * You can use this method to chose a good threshold value
+ * to use as value for touchAttachInterrupt
+ * */
+uint16_t touchRead(uint8_t pin);
+
+/*
+ * Set function to be called if touch pad value falls
+ * below the given threshold. Use touchRead to determine
+ * a proper threshold between touched and untouched state
+ * */
+void touchAttachInterrupt(uint8_t pin, void (*userFunc)(void), uint16_t threshold);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MAIN_ESP32_HAL_TOUCH_H_ */