added dtu interface, Ingo

diff --git a/trb_net_old_to_new.vhd b/trb_net_old_to_new.vhd
new file mode 100644 (file)
index 0000000..48930be
--- /dev/null
+++ b/trb_net_old_to_new.vhd
@@ -0,0 +1,74 @@
+-- this is an apl, connecting the old trigger bus to the new system
+
+
+LIBRARY IEEE;
+USE IEEE.STD_LOGIC_1164.ALL;
+USE IEEE.STD_LOGIC_ARITH.ALL;
+USE IEEE.STD_LOGIC_UNSIGNED.ALL;
+
+use work.trb_net_std.all;
+
+
+entity trb_net_old_to_new is
+    generic (TRIGGER_LEVEL  : integer := 1);  -- either 1 or 2
+  
+    port(
+    --  Misc
+    CLK    : in std_logic;             
+    RESET  : in std_logic;     
+    CLK_EN : in std_logic;
+
+    -- APL Transmitter port
+    APL_DATA_OUT:       out STD_LOGIC_VECTOR (47 downto 0); -- Data word "application to network"
+    APL_WRITE_OUT:      out STD_LOGIC; -- Data word is valid and should be transmitted
+    APL_FIFO_FULL_IN:   in  STD_LOGIC; -- Stop transfer, the fifo is full
+    APL_SHORT_TRANSFER_OUT: out STD_LOGIC; -- 
+    APL_DTYPE_OUT:      out STD_LOGIC_VECTOR (3 downto 0);  -- see NewTriggerBusNetworkDescr
+    APL_ERROR_PATTERN_OUT: out STD_LOGIC_VECTOR (31 downto 0); -- see NewTriggerBusNetworkDescr
+    APL_SEND_OUT:       out STD_LOGIC; -- Release sending of the data
+    APL_TARGET_ADDRESS_OUT: out STD_LOGIC_VECTOR (15 downto 0); -- Address of
+                                                               -- the target (only for active APIs)
+
+    -- Receiver port
+    APL_DATA_IN:      in  STD_LOGIC_VECTOR (47 downto 0); -- Data word "network to application"
+    APL_TYP_IN:       in  STD_LOGIC_VECTOR (2 downto 0);  -- Which kind of data word: DAT, HDR or TRM
+    APL_DATAREADY_IN: in  STD_LOGIC; -- Data word is valid and might be read out
+    APL_READ_OUT:     out STD_LOGIC; -- Read data word
+    
+    -- APL Control port
+    APL_RUN_IN:       in STD_LOGIC; -- Data transfer is running
+    APL_SEQNR_IN:     in STD_LOGIC_VECTOR (7 downto 0),
+
+    -- the OLD trigger bus
+    OLD_T:        in  STD_LOGIC;  --   trigger signal
+                                  --   used to strobe the trigger code
+    OLD_TS:       in  STD_LOGIC;  --    trigger strobe
+--                                      used to strobe the trigger tag and further
+--                                      trigger data nibbles (e.g. trigger priority)
+
+    OLD_TD:       in  STD_LOGIC_VECTOR (3 downto 0);  --       trigger data lines
+--                                                              transmit the trigger data nibbles
+    OLD_TB:       out STD_LOGIC;   --  trigger busy
+--                                      wired-or signal, that indicates busy state of one or more DTUs
+    OLD_TE:       out STD_LOGIC;   --  trigger error
+--                                      wired-or signal, that indicates error state of one or more DTUs
+--Ts0..1       trigger spare lines
+--free for future purposes
+--not connected because useless
+
+
+    );
+END trb_net_old_to_new;
+
+architecture trb_net_old_to_new_arch of trb_net_old_to_new is
+
+  -- reconstruct the LVL1 or LVL2 trigger
+  -- for LVL1: Ignore the BEGRUN and ENDRUN triggers
+  -- (please use the generic to check if we have LVL1 or 2)
+
+  -- compare to the SEQNR, do not forget the offset by one for LVL1
+  -- if a tigger tag mismatch occures, raise the error line
+
+  -- feel free to add debug registers
+    
+end trb_net_old_to_new_arch;