[Cryptech-Commits] [user/sra/aes_merged] 30/45: Added wait_ready task to allow test cases to wait for the core to complete an operation. This makes it possible to measure cycles for an operation.

[git at cryptech.is]

This is an automated email from the git hooks/post-receive script.

sra at hactrn.net pushed a commit to branch master
in repository user/sra/aes_merged.

commit e7474587db169f990fb4d762c69c0fcd096cc891
Author: Joachim Strömbergson <joachim at secworks.se>
AuthorDate: Tue May 22 10:21:58 2018 +0200

    Added wait_ready task to allow test cases to wait for the core to complete an operation. This makes it possible to measure cycles for an operation.
---
 src/tb/tb_aes.v | 24 ++++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/src/tb/tb_aes.v b/src/tb/tb_aes.v
index 188a21a..35fc1d9 100644
--- a/src/tb/tb_aes.v
+++ b/src/tb/tb_aes.v
@@ -306,6 +306,25 @@ module tb_aes();
   endtask // read_word
 
 
+  //----------------------------------------------------------------
+  // wait_ready
+  //
+  // Wait for the DUT to signal that the result is ready
+  //----------------------------------------------------------------
+  task wait_ready;
+    begin : wait_ready
+      reg rdy;
+      rdy = 1'b0;
+
+      while (rdy != 1'b1)
+        begin
+          read_word(ADDR_STATUS);
+          rdy = tb_read_data[STATUS_READY_BIT];
+        end
+    end
+  endtask // wait_ready
+
+
   //----------------------------------------------------------------
   // read_result()
   //
@@ -386,8 +405,9 @@ module tb_aes();
       write_word(ADDR_CONFIG, (8'h00 + (key_length << 1)+ encdec));
       write_word(ADDR_CTRL, 8'h02);
 
-      #(100 * CLK_PERIOD);
-
+      wait_ready();
+      $display("*** Ready has been set!");
+      dump_dut_state();
       read_result();
 
       if (result_data == expected)