How implement the bluetooth communication since the fpga to a microcontroller

Hi,

Here is a design example from Intel's design store regarding your implementation request:

https://fpgacloud.intel.com/devstore/platform/16.0.0/Standard/nios-ii-design-example-using-bluetooth-and-wifi/

It is based on a MAX10 FPGA board, you can download the documents in the documentation tabs. The installation packages is also available provided in the page.