Initial version

arduino/cores/esp32/wiring_analog.c

@@ -0,0 +1,45 @@
+/*
+  This file is part of the MKR WiFi 1010 firmware.
+  Copyright (C) 2018  Arduino AG (http://www.arduino.cc/)
+
+  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 Street, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#include <driver/ledc.h>
+
+#include "wiring_analog.h"
+
+void analogWrite(uint32_t pin, uint32_t value)
+{
+  periph_module_enable(PERIPH_LEDC_MODULE);
+
+  ledc_timer_config_t timerConf = {
+    .bit_num = LEDC_TIMER_10_BIT,
+    .freq_hz = 1000,
+    .speed_mode = LEDC_HIGH_SPEED_MODE,
+    .timer_num = (pin / 7),
+  };
+  ledc_timer_config(&timerConf);
+
+  ledc_channel_config_t ledc_conf = {
+    .channel = (pin % 7),
+    .duty = (value << 2),
+    .gpio_num = pin,
+    .intr_type = LEDC_INTR_DISABLE,
+    .speed_mode = LEDC_HIGH_SPEED_MODE,
+    .timer_sel = (pin / 7)
+  };
+  ledc_channel_config(&ledc_conf);
+}