I2C PWM expander added from different Project

components/lighting/include/i2cPort.hpp

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+/**
+ * @file i2cPort.hpp
+ * @author Gustice
+ * @brief C++ Wrapper for I2C-interface
+ *
+ * @copyright Copyright (c) 2024
+ */
+
+#pragma once
+
+#include "driver/gpio.h"
+#include "driver/i2c_master.h"
+#include "portBase.hpp"
+#include <vector>
+
+/**
+ * @brief I2C-Master Class
+ * @details More recent implementation of IDF-based I2C master
+ */
+class I2cMaster : public PortBase {
+  public:
+    class Slave {
+      public:
+        enum ClockRate {
+            _100k = 100000,
+            _400k = 400000,
+        };
+
+        Slave(I2cMaster &interface, uint8_t addr, ClockRate rate = _100k);
+        ~Slave();
+        bool writeTo(const std::vector<uint8_t> &data);
+        std::vector<uint8_t> readFrom(const std::vector<uint8_t> &address, unsigned size);
+
+      protected:
+        const uint8_t Addr;
+        I2cMaster &Interface;
+        i2c_master_dev_handle_t _devHandle;
+    };
+
+    I2cMaster(i2c_port_t port, gpio_num_t sda, gpio_num_t scl);
+    ~I2cMaster() = default;
+
+    bool probe(uint8_t addr);
+
+    const i2c_port_t Port;
+
+  private:
+    friend class Slave;
+    i2c_master_bus_handle_t _busHandle;
+};

components/lighting/include/portBase.hpp

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+/**
+ * @file portBase.hpp
+ * @author Gustice
+ * @brief Base-class for all hardware ports
+ *
+ * @copyright Copyright (c) 2024
+ */
+#pragma once
+
+class PortBase {
+  public:
+    PortBase(/* args */) {};
+
+    // Forbid Copy and Move assignments
+    PortBase(const PortBase &other) = delete;
+    PortBase &operator=(const PortBase &other) = delete;
+};

components/lighting/include/pwmExpanderPca9685.hpp

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+/**
+ * @file pwmExpanderPca9685.hpp
+ * @author Gustice
+ * @brief PWM-Expander PCA9685
+ * @details https://www.nxp.com/docs/en/data-sheet/PCA9685.pdf
+ *
+ * @copyright Copyright (c) 2024
+ */
+#pragma once
+
+#include "i2cPort.hpp"
+#include <array>
+#include <memory>
+#include <optional>
+
+/**
+ * @brief I2C-Connected LED-Driver with 16 ports
+ * @note This module can also be used to generate Servo-Motor signals
+ */
+class PmwExpanderPca9685 {
+  public:
+    static constexpr int PwmChannels = 16;
+    using GrayValues = std::array<uint16_t, PwmChannels>;
+    PmwExpanderPca9685(I2cMaster &port, bool inverted = false, uint8_t address = 0x40); // 0x40 default Address
+
+    void sendImage(GrayValues &grayValues);
+    void reset();
+    void setPwmFreq(float frequency, bool inverted);
+
+  private:
+    I2cMaster::Slave _port;
+    const uint8_t _address;
+    const size_t _count = 16;
+    // 16 LED-Channels with 4 bytes each + 4 byte overhead
+    std::vector<uint8_t> _data;
+
+    bool write(uint8_t reg, uint8_t data);
+    std::optional<uint8_t> read(uint8_t reg);
+};