I2C PWM expander added from different Project

2024-11-16 16:42:29 +01:00
parent deccb3186c
commit f6608075ff
7 changed files with 327 additions and 0 deletions
@@ -0,0 +1,39 @@
+/**
+ * @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);
+};