Can anyone help me with uvm_driver code of request-ack handshake considering
a. Req is output from testbench and ack is input to testbench
b. Request comes once in 3 clock cycles and ack also comes once in 3 clock cycles
c. outstanding request are 10, it means till 10 requests if there is no ack then 10th request will be outstanding request
In reply to bdreku:
Hello,
From above link ,I tried to write below piece of code of run_phase of uvm_driver ,Could you help me to consider all three cases
task run_phase(uvm_phase phase);
m_bfm.wait_for_reset();
forever begin
seq_item_port.get_next_item(req); // Start processing req item
m_bfm.drive(req);
seq_item_port.item_done(); // End of req item
end
task wait_for_reset();
@(posedge BUS.resetn);
endtask: wait_for_reset
task drive(bus_seq_item req);
repeat (req.delay) begin // Delay between bus transactions
@(posedge BUS.clk);
end
BUS.valid <= 1;
while (BUS.ack != 1) begin
@(posedge BUS.clk);
end
$cast(rsp, req.clone()); // Clone the req
BUS.valid <= 0; // End the pin level bus transaction
endtask: drive
sequence_body
/ Corresponding version of the sequence body method
task body;
req = bus_seq_item::type_id::create("req");
repeat (limit) begin
start_item(req);
assert(req.randomize());
finish_item(req);
get_response(rsp);
// The rsp handle points to the object that the driver has updated with response data
end
endtask: body
In reply to dddvlsique:
Can you please add code tag.
However, I didn’t find the put method in your driver to send response back to sequence unlike this example.