Interfaces - Tasks & Functions

Interfaces - Tasks & Functions

Tasks and functions can be defined within an interface, or they can be defined within one or more of the modules connected. This allows a more abstract level of modeling. For example “read” and “write” can be defined as tasks, without reference to any wires, and the master module can merely call these tasks. In a modport these tasks are declared as import tasks.

An example of using tasks in an interface

interface simple_bus (input bit clk); // Define the interface
logic req, gnt;
logic [7:0] addr, data;
logic [1:0] mode;
logic start, rdy;
task masterRead(input logic [7:0] raddr); // masterRead method

// ...
endtask: masterRead
task slaveRead; // slaveRead method
// ...
endtask: slaveRead
endinterface: simple_bus