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.pio/libdeps/m5stack-core-esp32/ESP32 AnalogWrite/.piopm

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+{"type": "library", "name": "ESP32 AnalogWrite", "version": "0.2.0", "spec": {"owner": "erropix", "id": 5819, "name": "ESP32 AnalogWrite", "requirements": null, "url": null}}

.pio/libdeps/m5stack-core-esp32/ESP32 AnalogWrite/LICENSE

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+MIT License
+
+Copyright (c) 2019 ERROPiX
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

.pio/libdeps/m5stack-core-esp32/ESP32 AnalogWrite/README.md

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+# About
+This library provides an analogWrite function polyfill for ESP32 Arduino framework by wrapping the [ledc](https://github.com/espressif/arduino-esp32/blob/master/cores/esp32/esp32-hal-ledc.c) library.
+
+Licensed under the MIT license.
+
+# Usage
+The library will do all the timer setup and channel selection work behind the scene so you don't have to worry about that.
+
+## Default Value Range
+Call the `analogWrite` function like in standard arduino framework:
+```cpp
+analogWrite(LED_BUILTIN, 255); // value range 0-255 so 255 = 100%
+```
+
+## Custom Value Range
+You can also set the maximum value as third parameter:
+```cpp
+analogWrite(LED_BUILTIN, 255, 1023); // value range 0-1023 so 255 = 25%
+```
+
+## Timer Resolution
+The default timer resolution is set to 13 bits in all the 16 channels, if you want to change that, use the `analogWriteResolution` function:
+```cpp
+analogWriteResolution(10); // set resolution to 10 bits for all pins
+analogWriteResolution(LED_BUILTIN, 10); // set resolution to 10 bits for LED pin
+```
+
+## PWM Frequency
+The default PWM frequency is set to 5000 Hz in all the 16 channels, if you want to change that, use the `analogWriteFrequency` function:
+```cpp
+analogWriteFrequency(10000); // set frequency to 10 KHz for all pins
+analogWriteFrequency(LED_BUILTIN, 10000); // set frequency to 10 KHz for LED pin
+```
+
+Please note that both timer resolution and PWM frequency should be calculated to get the expected results, if frequency is not set correctly, the output PWM signal wont be as expected, read more about [Supported Range of Frequency and Duty Resolution](https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/peripherals/ledc.html#ledc-api-supported-range-frequency-duty-resolution) in the official Espressif documentation website.

.pio/libdeps/m5stack-core-esp32/ESP32 AnalogWrite/examples/ledFade/ledFade.ino

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+#include <Arduino.h>
+#include <analogWrite.h>
+
+int brightStep = 1;
+int brightness = 0;
+
+void setup() {
+  // Set resolution for a specific pin
+  analogWriteResolution(LED_BUILTIN, 12);
+}
+
+void loop() {
+  brightness += brightStep;
+  if ( brightness == 0 || brightness == 255 ) {
+    brightStep = -brightStep;
+  }
+
+  analogWrite(LED_BUILTIN, brightness);
+
+  delay(10);
+}

.pio/libdeps/m5stack-core-esp32/ESP32 AnalogWrite/keywords.txt

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+#######################################
+# Datatypes
+#######################################
+
+analog_write_channel_t	KEYWORD1
+
+#######################################
+# Methods and Functions
+#######################################
+
+analogWrite	KEYWORD2
+analogWriteChannel	KEYWORD2
+analogWriteFrequency	KEYWORD2
+analogWriteResolution	KEYWORD2
+
+#######################################
+# Constants
+#######################################
+

.pio/libdeps/m5stack-core-esp32/ESP32 AnalogWrite/library.json

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+{
+    "name": "ESP32 AnalogWrite",
+    "keywords": "esp32, analogWrite, LEDC",
+    "description": "Provides an analogWrite polyfill for ESP32 using the LEDC functions",
+    "license": "MIT",
+    "version": "0.2",
+    "frameworks": "arduino",
+    "platforms": "espressif32",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/ERROPiX/ESP32_AnalogWrite.git"
+    },
+    "authors": [
+        {
+            "name": "Abdelouahed ERROUAGUY",
+            "email": "errouaguy.pro@gmail.com"
+        }
+    ]
+}

.pio/libdeps/m5stack-core-esp32/ESP32 AnalogWrite/library.properties

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+name=ESP32 AnalogWrite
+version=0.1
+author=ERROPiX
+maintainer=Abdelouahed ERROUAGUY
+sentence=ESP32 Polyfill for analogWrite functions
+paragraph=Provides an analogWrite polyfill for ESP32 using the LEDC functions
+category=Signal Input/Output
+url=https://github.com/ERROPiX/ESP32_AnalogWrite
+architectures=esp32
+includes=analogWrite.h

.pio/libdeps/m5stack-core-esp32/ESP32 AnalogWrite/src/analogWrite.cpp

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+#include "analogWrite.h"
+
+analog_write_channel_t _analog_write_channels[16] = {
+    {-1, 5000, 13},
+    {-1, 5000, 13},
+    {-1, 5000, 13},
+    {-1, 5000, 13},
+    {-1, 5000, 13},
+    {-1, 5000, 13},
+    {-1, 5000, 13},
+    {-1, 5000, 13},
+    {-1, 5000, 13},
+    {-1, 5000, 13},
+    {-1, 5000, 13},
+    {-1, 5000, 13},
+    {-1, 5000, 13},
+    {-1, 5000, 13},
+    {-1, 5000, 13},
+    {-1, 5000, 13}};
+
+int analogWriteChannel(uint8_t pin)
+{
+  int channel = -1;
+
+  // Check if pin already attached to a channel
+  for (uint8_t i = 0; i < 16; i++)
+  {
+    if (_analog_write_channels[i].pin == pin)
+    {
+      channel = i;
+      break;
+    }
+  }
+
+  // If not, attach it to a free channel
+  if (channel == -1)
+  {
+    for (uint8_t i = 0; i < 16; i++)
+    {
+      if (_analog_write_channels[i].pin == -1)
+      {
+        _analog_write_channels[i].pin = pin;
+        channel = i;
+        ledcSetup(channel, _analog_write_channels[i].frequency, _analog_write_channels[i].resolution);
+        ledcAttachPin(pin, channel);
+        break;
+      }
+    }
+  }
+
+  return channel;
+}
+
+void analogWriteFrequency(double frequency)
+{
+  for (uint8_t i = 0; i < 16; i++)
+  {
+    _analog_write_channels[i].frequency = frequency;
+  }
+}
+
+void analogWriteFrequency(uint8_t pin, double frequency)
+{
+  int channel = analogWriteChannel(pin);
+
+  // Make sure the pin was attached to a channel, if not do nothing
+  if (channel != -1 && channel < 16)
+  {
+    _analog_write_channels[channel].frequency = frequency;
+  }
+}
+
+void analogWriteResolution(uint8_t resolution)
+{
+  for (uint8_t i = 0; i < 16; i++)
+  {
+    _analog_write_channels[i].resolution = resolution;
+  }
+}
+
+void analogWriteResolution(uint8_t pin, uint8_t resolution)
+{
+  int channel = analogWriteChannel(pin);
+
+  // Make sure the pin was attached to a channel, if not do nothing
+  if (channel != -1 && channel < 16)
+  {
+    _analog_write_channels[channel].resolution = resolution;
+  }
+}
+
+void analogWrite(uint8_t pin, uint32_t value, uint32_t valueMax)
+{
+  int channel = analogWriteChannel(pin);
+
+  // Make sure the pin was attached to a channel, if not do nothing
+  if (channel != -1 && channel < 16)
+  {
+    uint8_t resolution = _analog_write_channels[channel].resolution;
+    uint32_t levels = pow(2, resolution);
+    uint32_t duty = ((levels - 1) / valueMax) * min(value, valueMax);
+
+    // write duty to LEDC
+    ledcWrite(channel, duty);
+  }
+}

.pio/libdeps/m5stack-core-esp32/ESP32 AnalogWrite/src/analogWrite.h

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+#ifndef _ESP32_ANALOG_WRITE_
+#define _ESP32_ANALOG_WRITE_
+
+#include <Arduino.h>
+
+typedef struct analog_write_channel
+{
+  int8_t pin;
+  double frequency;
+  uint8_t resolution;
+} analog_write_channel_t;
+
+int analogWriteChannel(uint8_t pin);
+
+void analogWriteFrequency(double frequency);
+void analogWriteFrequency(uint8_t pin, double frequency);
+
+void analogWriteResolution(uint8_t resolution);
+void analogWriteResolution(uint8_t pin, uint8_t resolution);
+
+void analogWrite(uint8_t pin, uint32_t value, uint32_t valueMax = 255);
+
+#endif