Add new library and example

Author: ozgurbostan

libraries/03_PWM/examples/LedParlaklikAyari - analogWrite/LedParlaklikAyari.ino

@@ -0,0 +1,24 @@
+#include "deneyap.h"
+#include "analogWrite.h"
+
+#define LED_PIN   LEDB                              // Led pini (PWM cikis pini) 
+
+uint8_t brightness = 0;                             // Ledin parlaklik ayari (0-255)
+uint8_t brightStep = 5;                             // Parlaklik degisim adimi
+
+void setup() {
+  analogWriteChannel(LED_PIN);                      // PWM pin ayari   
+}
+
+void loop() {
+  brightness += brightStep;                         // Parlaklik kademesi degistiriliyor
+
+  if ( brightness == 0 || brightness == 255 )       // Sinir degerlerde parlaklik yonu degistiriliyor
+  {
+    brightStep = -brightStep;
+  }
+
+  analogWrite(LED_PIN, brightness);                 // Parlaklik degeri pin ile iliskilendiriliyor
+  
+  delay(50);
+}

libraries/03_PWM/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);
+  }
+}

libraries/03_PWM/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