Updates to muxes to support multiple instances sharing i2c bus.

Add input signal so that we can ignore requests to enable multiple
mux channels concurrently, even across virtual pca9545s, and 
test cases to check this stuff.
adds the phy consolidator and test

hdl/ip/vhd/i2c/io_expanders/PCA9506ish/BUCK

@@ -24,6 +24,7 @@ vunit_sim(
     deps = [
         ":pca9506_top",
         "//hdl/ip/vhd/vunit_components:i2c_controller_vc",
+        "//hdl/ip/vhd/i2c/target:i2c_phy_consolidator",
     ],
     visibility = ['PUBLIC'],
 )

hdl/ip/vhd/i2c/io_expanders/PCA9506ish/pca9506_function.vhd

@@ -91,6 +91,8 @@ begin
         case r.state is
             when IDLE =>
                 v.increment := '0';
+                v.data_valid := '0';
+                v.post_ack_state := IDLE;
                 if txn_header.valid = '1' and txn_header.tgt_addr = i2c_addr then
                     v.state := ACK;
                     if txn_header.read_write_n = '0' then

hdl/ip/vhd/i2c/io_expanders/PCA9506ish/sims/i2c_pca9506ish_sim_pkg.vhd

@@ -17,38 +17,36 @@ use work.i2c_ctrl_vc_pkg.all;
 
 package i2c_pca9506ish_sim_pkg is
 
-    constant i2c_tgt_addr: std_logic_vector(6 downto 0) := 7x"20";
-
     constant i2c_ctrl_vc : i2c_ctrl_vc_t := new_i2c_ctrl_vc("i2c_ctrl_vc");
 
     -- Some helper functions for writing test benches.
     -- want to be able to read/write arbitrary registers
     -- want to be able to read/write categories of registers (wrapping)
     procedure single_write_pca9506_reg(
         signal net : inout network_t;
+        constant i2c_addr : in std_logic_vector(6 downto 0);
         constant register_addr : in integer range 0 to 16#27#;
         constant write_data: in std_logic_vector(7 downto 0);
         variable did_ack: inout boolean;
-        constant auto_inc: in boolean := true;
-        constant i2c_addr : in std_logic_vector(6 downto 0) := i2c_tgt_addr
+        constant auto_inc: in boolean := true
     );
     procedure write_pca9506_reg(
         signal net : inout network_t;
+        constant i2c_addr : in std_logic_vector(6 downto 0);
         constant starting_reg : in integer range 0 to 16#27#;
         constant byte_queue: in queue_t;
         constant ack_queue: in queue_t;
-        constant auto_inc: in boolean := true;
-        constant i2c_addr : in std_logic_vector(6 downto 0) := i2c_tgt_addr
+        constant auto_inc: in boolean := true
     );
 
     procedure read_pca9506_reg(
         signal net : inout network_t;
+        constant i2c_addr : in std_logic_vector(6 downto 0);
         constant starting_reg : in integer range 0 to 16#27#;
         constant num_regs_to_read : in integer;
         constant response_queue: in queue_t;
         constant ack_queue: in queue_t;
-        constant auto_inc: in boolean := true;
-        constant i2c_addr : in std_logic_vector(6 downto 0) := i2c_tgt_addr
+        constant auto_inc: in boolean := true
     );
 
 end package;
@@ -57,17 +55,17 @@ package body i2c_pca9506ish_sim_pkg is
 
     procedure single_write_pca9506_reg(
         signal net : inout network_t;
+        constant i2c_addr : in std_logic_vector(6 downto 0);
         constant register_addr : in integer range 0 to 16#27#;
         constant write_data: in std_logic_vector(7 downto 0);
         variable did_ack: inout boolean;
-        constant auto_inc: in boolean := true;
-        constant i2c_addr : in std_logic_vector(6 downto 0) := i2c_tgt_addr
+        constant auto_inc: in boolean := true
     ) is
         constant tx_queue : queue_t := new_queue;
         constant ack_queue: queue_t := new_queue;
     begin
         push_byte(tx_queue, to_integer(write_data));
-        write_pca9506_reg(net, register_addr, tx_queue, tx_queue, auto_inc, i2c_addr);
+        write_pca9506_reg(net, i2c_addr, register_addr, tx_queue, tx_queue, auto_inc);
         did_ack := true;
         while not is_empty(ack_queue) loop
             if pop_byte(ack_queue) = 0 then
@@ -79,11 +77,11 @@ package body i2c_pca9506ish_sim_pkg is
 
     procedure write_pca9506_reg(
         signal net : inout network_t;
+        constant i2c_addr : in std_logic_vector(6 downto 0);
         constant starting_reg : in integer range 0 to 16#27#;
         constant byte_queue: in queue_t;
         constant ack_queue: in queue_t;
-        constant auto_inc: in boolean := true;
-        constant i2c_addr : in std_logic_vector(6 downto 0) := i2c_tgt_addr
+        constant auto_inc: in boolean := true
     ) is
         variable cmd_reg : std_logic_vector(7 downto 0);
         constant tx_queue : queue_t := new_queue;
@@ -102,12 +100,12 @@ package body i2c_pca9506ish_sim_pkg is
 
     procedure read_pca9506_reg(
         signal net : inout network_t;
+        constant i2c_addr : in std_logic_vector(6 downto 0);
         constant starting_reg : in integer range 0 to 16#27#;
         constant num_regs_to_read : in integer;
         constant response_queue: in queue_t;
         constant ack_queue: in queue_t;
-        constant auto_inc: in boolean := true;
-        constant i2c_addr : in std_logic_vector(6 downto 0) := i2c_tgt_addr
+        constant auto_inc: in boolean := true
     ) is
         variable cmd_reg : std_logic_vector(7 downto 0);
         constant tx_queue : queue_t := new_queue;