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Making the testbench self checking

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Signed-off-by: Joachim Strömbergson <joachim@assured.se>
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Joachim Strömbergson 2023-05-03 15:15:32 +02:00 committed by dehanj
parent 1d2a71ec0c
commit 18bb9b8599
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GPG Key ID: 3707A9DBF4BB8F1A
1 changed files with 40 additions and 34 deletions
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74
hw/application_fpga/core/uds/tb/tb_uds.v
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@ -178,7 +178,7 @@ module tb_uds();
// the word read will be available in the global variable
// read_data.
//----------------------------------------------------------------
task read_word(input [11 : 0] address);
task read_word(input [11 : 0] address, input [31 : 0] expected);
begin : read_word
reg [31 : 0] read_data;
@ -193,7 +193,13 @@ module tb_uds();
if (DEBUG)
begin
$display("--- Reading 0x%08x from 0x%02x.", read_data, address);
if (read_data == expected) begin
$display("--- Reading 0x%08x from 0x%02x.", read_data, address);
end else begin
$display("--- Error: Got 0x%08x when reading from 0x%02x, expected 0x%08x",
read_data, address, expected);
error_ctr = error_ctr + 1;
end
$display("");
end
end
@ -224,33 +230,33 @@ module tb_uds();
dump_dut_state();
$display("--- test1: Reading UDS words.");
read_word(ADDR_UDS_FIRST + 0);
read_word(ADDR_UDS_FIRST + 1);
read_word(ADDR_UDS_FIRST + 2);
read_word(ADDR_UDS_FIRST + 0, 32'hf0f0f0f0);
read_word(ADDR_UDS_FIRST + 1, 32'he1e1e1e1);
read_word(ADDR_UDS_FIRST + 2, 32'hd2d2d2d2);
$display("--- test1: Dumping state again to see read bits.");
dump_dut_state();
$display("--- test1: Reading rest of the words.");
read_word(ADDR_UDS_FIRST + 3);
read_word(ADDR_UDS_FIRST + 4);
read_word(ADDR_UDS_FIRST + 5);
read_word(ADDR_UDS_FIRST + 6);
read_word(ADDR_UDS_FIRST + 7);
read_word(ADDR_UDS_FIRST + 3, 32'hc3c3c3c3);
read_word(ADDR_UDS_FIRST + 4, 32'hb4b4b4b4);
read_word(ADDR_UDS_FIRST + 5, 32'ha5a5a5a5);
read_word(ADDR_UDS_FIRST + 6, 32'h96969696);
read_word(ADDR_UDS_FIRST + 7, 32'h87878787);
$display("--- test1: Dumping state again to see read bits.");
dump_dut_state();
$display("--- test1: Reading UDS words again.");
$display("--- test1: This should return all zeros.");
read_word(ADDR_UDS_FIRST + 0);
read_word(ADDR_UDS_FIRST + 1);
read_word(ADDR_UDS_FIRST + 2);
read_word(ADDR_UDS_FIRST + 3);
read_word(ADDR_UDS_FIRST + 4);
read_word(ADDR_UDS_FIRST + 5);
read_word(ADDR_UDS_FIRST + 6);
read_word(ADDR_UDS_FIRST + 7);
read_word(ADDR_UDS_FIRST + 0, 32'h0);
read_word(ADDR_UDS_FIRST + 1, 32'h0);
read_word(ADDR_UDS_FIRST + 2, 32'h0);
read_word(ADDR_UDS_FIRST + 3, 32'h0);
read_word(ADDR_UDS_FIRST + 4, 32'h0);
read_word(ADDR_UDS_FIRST + 5, 32'h0);
read_word(ADDR_UDS_FIRST + 6, 32'h0);
read_word(ADDR_UDS_FIRST + 7, 32'h0);
$display("--- test1: Resetting DUT.");
$display("--- test1: This should allow access again.");
@ -271,25 +277,25 @@ module tb_uds();
dump_dut_state();
$display("--- test1: Reading UDS words in changed order.");
read_word(ADDR_UDS_FIRST + 7);
read_word(ADDR_UDS_FIRST + 6);
read_word(ADDR_UDS_FIRST + 4);
read_word(ADDR_UDS_FIRST + 3);
read_word(ADDR_UDS_FIRST + 1);
read_word(ADDR_UDS_FIRST + 0);
read_word(ADDR_UDS_FIRST + 5);
read_word(ADDR_UDS_FIRST + 2);
read_word(ADDR_UDS_FIRST + 7, 32'h78787878);
read_word(ADDR_UDS_FIRST + 6, 32'h69696969);
read_word(ADDR_UDS_FIRST + 4, 32'h4b4b4b4b);
read_word(ADDR_UDS_FIRST + 3, 32'h3c3c3c3c);
read_word(ADDR_UDS_FIRST + 1, 32'h1e1e1e1e);
read_word(ADDR_UDS_FIRST + 0, 32'h0f0f0f0f);
read_word(ADDR_UDS_FIRST + 5, 32'h5a5a5a5a);
read_word(ADDR_UDS_FIRST + 2, 32'h2d2d2d2d);
$display("--- test1: Reading UDS words again.");
$display("--- test1: This should return all zeros.");
read_word(ADDR_UDS_FIRST + 0);
read_word(ADDR_UDS_FIRST + 1);
read_word(ADDR_UDS_FIRST + 2);
read_word(ADDR_UDS_FIRST + 3);
read_word(ADDR_UDS_FIRST + 4);
read_word(ADDR_UDS_FIRST + 5);
read_word(ADDR_UDS_FIRST + 6);
read_word(ADDR_UDS_FIRST + 7);
read_word(ADDR_UDS_FIRST + 0, 32'h0);
read_word(ADDR_UDS_FIRST + 1, 32'h0);
read_word(ADDR_UDS_FIRST + 2, 32'h0);
read_word(ADDR_UDS_FIRST + 3, 32'h0);
read_word(ADDR_UDS_FIRST + 4, 32'h0);
read_word(ADDR_UDS_FIRST + 5, 32'h0);
read_word(ADDR_UDS_FIRST + 6, 32'h0);
read_word(ADDR_UDS_FIRST + 7, 32'h0);
$display("--- test1: completed.");
$display("");