Subversion Repositories apb2spi

class apb_driver extends uvm_driver#(apb_seq_item);
        `uvm_component_utils(apb_driver)

        //uvm_analysis_port#(apb_seq_item) apb_ap;

        virtual apb_if v_intf;
        apb_seq_item txns;

function new(string name,uvm_component parent);
        super.new(name,parent);
        //apb_ap = new("apb_ap",this);
endfunction

function void build_phase(uvm_phase phase);
        super.build_phase(phase);
        if(!uvm_config_db #(virtual apb_if)::get(this,"*","apb_vif",v_intf))
                `uvm_fatal("NO_APB_V_INTF","Virtual interface couldn't be obtained for apb driver")
        else
                `uvm_info("APB_V_INTF","Virtual interface has been obtained driver",UVM_NONE)

        txns = apb_seq_item::type_id::create("txns");
endfunction

task run_phase(uvm_phase phase);
        v_intf.PENABLE = 1'b0;
        forever begin
                `uvm_info("DRVR_RUN","Inside the run phase of driver",UVM_NONE)
                seq_item_port.get_next_item(txns);
                `uvm_info("DRVR_RUN",$psprintf("After getting the seq_item from seq, value of seq_item is %p",this.txns),UVM_NONE)
                v_intf.PADDR = txns.paddr;
                //repeat(1)@(posedge v_intf.PCLK);
                `uvm_info("DRVR_RUN","After assigning PADDR from sequence_item",UVM_NONE)
                if(txns.pwrite==1'b1)begin
                        `uvm_info("DRVR_RUN","Invoking the apb_write task",UVM_NONE)
                        apb_write(txns);
                end else begin
                        `uvm_info("DRVR_RUN","Invoking the apb_read task",UVM_NONE)
                        apb_read(txns);
                end
                repeat(1)@(posedge v_intf.PCLK);        
                seq_item_port.item_done();
        end
endtask
        
task apb_write(apb_seq_item txns);
begin
        @(posedge v_intf.PCLK); 
        //wait(v_intf.PREADY==1'b0);
        v_intf.PSEL = 1'b1;
        v_intf.PENABLE = 1'b0;
        v_intf.PADDR = txns.paddr;
        v_intf.PWRITE = txns.pwrite;
        @(posedge v_intf.PCLK); 
        v_intf.PENABLE = 1'b1;
        wait(v_intf.PREADY==1'b1);
        v_intf.PWDATA = txns.pwdata;
        wait(v_intf.PREADY==1'b0);
        v_intf.PSEL = 1'b0;
        v_intf.PADDR = 'h0;
        v_intf.PWRITE = 'h0;
        v_intf.PENABLE = 1'b0;
end
endtask 

task apb_read(apb_seq_item txns);
begin
        @(posedge v_intf.PCLK); 
        //wait(v_intf.PREADY==1'b0);
        v_intf.PSEL = 1'b1;
        v_intf.PENABLE = 1'b0;
        v_intf.PADDR = txns.paddr;
        v_intf.PWRITE = 1'b0;
        repeat(1)@(posedge v_intf.PCLK);        
        v_intf.PENABLE = 1'b1;
        wait(v_intf.PREADY==1'b1);
        txns.prdata = v_intf.PRDATA;
        wait(v_intf.PREADY==1'b0);
        v_intf.PSEL = 1'b0;
        v_intf.PADDR = 'h0;
        v_intf.PWRITE = 'h0;
        v_intf.PENABLE = 1'b0;
end
endtask 


endclass