How to use v7670

I'm trying using the ov7670 and arduino Uno with this code GitHub - ComputerNerd/ov7670-no-ram-arduino-uno: Allows you to use a non fifo ov7670 on the arudino uno without external spi ram like other examples. Sends the data to UART.. After connecting all cables with recommended pull up resistors and voltage divider. I typed 'make write flash' inside the source directory. But after that I have no idea what to do to get an image.

Could anyone please let me know how to make it?

You should ask the authors or consult the project website, about the usage of the code.
When you find some "ino" file in the source directory, open it in the Arduino IDE and upload it to your board.

You may be better off with a library accompanied by instructions.