attilio:

diff --git a/design/tdc_readout_and_trb_interface.vhd b/design/tdc_readout_and_trb_interface.vhd
index e6322f78cf4bd130edf4e1ce23a024fc8b579879..c4cad1ff084daf272e0e667a121479faa25709e8 100644 (file)
--- a/design/tdc_readout_and_trb_interface.vhd
+++ b/design/tdc_readout_and_trb_interface.vhd
@@ -153,6 +153,8 @@ architecture behavioral of tdc_readout_and_trb_interface is
   signal reg_ipu_number : std_logic_vector (15 downto 0);
 
   signal reg_lvl1_error_pattern, next_lvl1_error_pattern : std_logic_vector (31 downto 0);
+ -- signal reg_ipu_error_pattern, next_ipu_error_pattern : std_logic_vector (31 downto 0);
+    
   signal reg_lvl1_trg_release, next_lvl1_trg_release : std_logic;
   signal reg_ipu_data, next_ipu_data : std_logic_vector (31 downto 0);
   signal reg_ipu_data_ready, next_ipu_data_ready :  std_logic;
@@ -529,7 +531,10 @@ end process;
   IPU_READOUT_FINISHED_OUT <= reg_ipu_finished;
 
   IPU_LENGTH_OUT <= reg_first_header(51 downto 36);
-  IPU_ERROR_PATTERN_OUT <=  x"AAAAAAAA";
+
+--test in case no data in fifo (ok if I don't buffer many events)
+--set the 18th bit if fifo data is empty
+   IPU_ERROR_PATTERN_OUT <= x"000" & "0100" & x"0000" when (empty_flag_fee_data_fifo_i = '1') else (others => '0');--reg_ipu_error_pattern;
 
 
 -- Count number of dataword per event
@@ -702,6 +707,7 @@ end process;
         reg_ipu_data_ready <= '0';
         reg_ipu_finished <= '0';
         reg_pseudo_token <= '0';
+       -- reg_ipu_error_pattern <= (others => '0');
       else
         current_state_fsm_multiplexer <= next_state_fsm_multiplexer;
         reg_debug_register_fsm_multiplexer <= next_debug_register_fsm_multiplexer;
@@ -713,6 +719,7 @@ end process;
         reg_ipu_data_ready <= next_ipu_data_ready; 
         reg_ipu_finished <= next_ipu_finished;
         reg_pseudo_token <= next_pseudo_token;
+      --  reg_ipu_error_pattern <=  next_ipu_error_pattern;
       end if;
     end if;
   end process;
@@ -744,7 +751,8 @@ end process;
     clear_counter_word_read_from_trbnet <= '0';
     push_read_fee_data_1_i <= '0';
     next_pseudo_token <= '0';
-
+  --  next_ipu_error_pattern <= (others => '0');
+    
     case current_state_fsm_multiplexer is
 
       when idle_state_fsm_multiplexer =>