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diff --git a/trb_net16_ipudata.vhd b/trb_net16_ipudata.vhd
new file mode 100644 (file)
index 0000000..685aa44
--- /dev/null
+++ b/trb_net16_ipudata.vhd
@@ -0,0 +1,118 @@
+LIBRARY IEEE;
+USE IEEE.std_logic_1164.ALL;
+USE IEEE.std_logic_ARITH.ALL;
+USE IEEE.std_logic_UNSIGNED.ALL;
+library work;
+use work.trb_net_std.all;
+
+
+entity trb_net16_ipudata is
+  port(
+  --  Misc
+    CLK    : in std_logic;
+    RESET  : in std_logic;
+    CLK_EN : in std_logic;
+  -- Port to API
+    API_DATA_OUT           : out std_logic_vector (c_DATA_WIDTH-1 downto 0);
+    API_PACKET_NUM_OUT     : out std_logic_vector (c_NUM_WIDTH-1  downto 0);
+    API_DATAREADY_OUT      : out std_logic;
+    API_READ_IN            : in  std_logic;
+    API_SHORT_TRANSFER_OUT : out std_logic;
+    API_DTYPE_OUT          : out std_logic_vector (3 downto 0);
+    API_ERROR_PATTERN_OUT  : out std_logic_vector (31 downto 0);
+    API_SEND_OUT           : out std_logic;
+    -- Receiver port
+    API_DATA_IN         : in  std_logic_vector (c_DATA_WIDTH-1 downto 0);
+    API_PACKET_NUM_IN   : in  std_logic_vector (c_NUM_WIDTH-1  downto 0);
+    API_TYP_IN          : in  std_logic_vector (2 downto 0);
+    API_DATAREADY_IN    : in  std_logic;
+    API_READ_OUT        : out std_logic;
+    -- APL Control port
+    API_RUN_IN          : in  std_logic;
+    API_SEQNR_IN        : in  std_logic_vector (7 downto 0);
+    API_LENGTH_OUT      : out std_logic_vector (15 downto 0);
+
+    --Information received with request
+    IPU_TRG_NUMBER_OUT   : out std_logic_vector (15 downto 0);
+    IPU_TRG_RND_CODE_OUT : out std_logic_vector (7 downto 0);
+    --start strobe 
+    IPU_START_READOUT_OUT: out std_logic;
+    --detector data, equipped with DHDR
+    IPU_DATA_IN          : in  std_logic_vector (31 downto 0);
+    IPU_DATAREADY_IN     : in  std_logic;
+    --no more data, end transfer, send TRM
+    IPU_READOUT_FINISHED_IN : in  std_logic;
+    --will be low every second cycle due to 32bit -> 16bit conversion
+    IPU_READ_OUT         : out std_logic;
+    IPU_LENGTH_IN        : in  std_logic_vector (15 downto 0);
+    IPU_ERROR_PATTERN_IN : in  std_logic_vector (31 downto 0);
+    
+    
+    STAT_DEBUG          : out std_logic_vector(31 downto 0)
+    );
+end entity;
+
+architecture trb_net16_ipudata_arch of trb_net16_ipudata is
+
+  signal buf_IPU_ERROR_PATTERN_IN : std_logic_vector(31 downto 0);
+  signal buf_IPU_LENGTH_IN        : std_logic_vector(15 downto 0);
+  signal update_buffers           : std_logic;
+  signal buf_API_READ_OUT         : std_logic;
+  signal buf_API_DATAREADY_OUT    : std_logic;
+  signal buf_API_DATA_OUT         : std_logic_vector (c_DATA_WIDTH-1 downto 0);
+  signal buf_API_PACKET_NUM_OUT   : std_logic_vector (c_NUM_WIDTH-1 downto 0);  
+  type state_t is (IDLE, );
+  signal state : state_t;  
+  signal buf_API_TRG_NUMBER_OUT   : std_logic_vector (15 downto 0);
+  signal buf_API_TRG_RND_CODE_OUT : std_logic_vector (7 downto 0);
+begin
+
+
+  PROC_STATE_MACHINE : process(CLK)
+    begin
+      if rising_edge(CLK) then
+        if RESET = '1' then
+          state <= IDLE;
+          buf_API_READ_OUT <= '0';
+        else
+          case state is 
+            when IDLE =>
+              if API_DATAREADY_IN = '1' and buf_API_READ_OUT = '1' then
+                case API_PACKET_NUM_IN is
+                  when c_F0 =>
+                  when c_F1 =>
+                  when c_F2 =>
+                  when c_F3 =>
+                  when others => null
+                end case;
+              end if;
+            when others =>
+              state <= IDLE;
+          end case;
+        end if;
+      end if;
+    end process;
+
+  PROC_buffer_inputs : process(CLK)
+    begin
+      if rising_edge(CLK) then
+        if RESET = '1' then
+          buf_IPU_LENGTH_IN <= (others => '1');
+          buf_IPU_ERROR_PATTERN_IN <= (others => '0');
+        elsif update_buffers = '1' then
+          buf_IPU_LENGTH_IN <= IPU_LENGTH_IN;
+          buf_IPU_ERROR_PATTERN_IN <= IPU_ERROR_PATTERN_IN;
+        end if;
+      end if;  
+    end process;
+  
+  API_ERROR_PATTERN_OUT <= buf_IPU_ERROR_PATTERN_IN;
+  API_LENGTH_OUT        <= buf_IPU_LENGTH_IN;
+  API_READ_OUT          <= buf_API_READ_OUT;
+  API_DATAREADY_OUT     <= buf_API_DATAREADY_OUT;
+  API_DATA_OUT          <= buf_API_DATA_OUT;
+  API_PACKET_NUM_OUT    <= buf_API_PACKET_NUM_OUT;
+
+
+  
+end architecture;
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