This page describle the basic control over the sensor registers using Arducam camera breakout board, it might not be able to cover all the detail register operations, but give you an insight how to adjust these settings.
Sensor I2C Slave Address
The OV7675 camera I2C 8-bit slave address is fixed to 0x42. With 8bit regsiter address, and 8bit register value.
There is two product ID register (0x0A and 0x0B) which can help diagnose if the I2C bus is accessable and determine the camera models.
|Product ID Register||Value|
You need a basic settings to bring up the sensor and make it working in normal streaming mode. Here is the sample config for the Window GUI.