SPI_Test/tb/testbench/spi_tb/spi_if.sv

interface spi_if(input clk,input rstn); 

  //timeunit      1ns;
  //timeprecision 1ps;
  logic 	sclk;
  logic 	csn;
  logic 	mosi;
  logic 	miso;
  logic 	error_check;

  

endinterface : spi_if