Altera SerialLite II IP Core - Manual (Page 103)

Chapter 5: Testbench 5–17
Example Testbench – Verilog HDL
January 2014 Altera Corporation SerialLite II MegaCore Function
User Guide
Table 5–12 shows and explains a demonstration testbench main section example,
allowing you to easily modify the testbench. You can change the packet size, port
address, number of packets, and so on, or force certain behavior.
1 This example testbench may not match your testbench exactly.
Table 5–12. Example of a Demonstration Testbench (Part 1 of 5)
Main Section Comments
//SERIALLITE2_TB_MAIN_START Start of the testbench main section; the only section
intended to be modified.
integer pkt_cnt_dat_dut;
integer pkt_cnt_pri_dut;
integer pkt_cnt_dat_sis;
integer pkt_cnt_pri_sis;
Declare packet counters.
//----------------------------------------------
-----------
//Define the number of packets / streaming bytes
to be sent
//----------------------------------------------
-----------
integer packets_to_send; initial packets_to_send
= 5;
integer streaming_bytes; initial streaming_bytes
= 1500;
//----------------------------------------------
-----------
Defines the number of packets (5) or streaming bytes
(1,500) to be sent.
initial begin
#1;
Main initial block.
exp_tc_cnt = 1;
Sets expectation for the number of test cases (checks);
this number must match the number of tc_start/tc_end
pairs in the testbench, otherwise the testbench is declared
INCOMPLETE.
err_limit = 0; Sets expectation for the number of errors.
tc_start(`TBID); Testcase start.
wait (reset_n == 1);
Waiting for the reset to complete; the reset is asserted in a
separate initial block.
// initialize packet counters
pkt_cnt_dat_dut = packets_to_send;
Sets the number of packets to be sent to the regular data
port of the DUT MegaCore function.
pkt_cnt_pri_dut = packets_to_send;
Sets the number of packets to be sent to the high priority
port of the DUT MegaCore function.
pkt_cnt_dat_sis = packets_to_send;
Sets the number of packets to be sent to the regular data
port of the SISTER MegaCore function.
pkt_cnt_pri_sis = packets_to_send;
Sets the number of packets to be sent to the high priority
port of the SISTER MegaCore function.
wait (linked_up == 1); Wait for DUT and SISTER to go into link-up.