add some code

main/boards/common/i2c_device.h

@@ -0,0 +1,18 @@
+#ifndef I2C_DEVICE_H
+#define I2C_DEVICE_H
+
+#include <driver/i2c_master.h>
+
+class I2cDevice {
+public:
+    I2cDevice(i2c_master_bus_handle_t i2c_bus, uint8_t addr);
+
+protected:
+    i2c_master_dev_handle_t i2c_device_;
+
+    void WriteReg(uint8_t reg, uint8_t value);
+    uint8_t ReadReg(uint8_t reg);
+    void ReadRegs(uint8_t reg, uint8_t* buffer, size_t length);
+};
+
+#endif // I2C_DEVICE_H