src: Remove ack_received signal as this is not used!

src/can_core/can_core.vhd

@@ -366,7 +366,6 @@ architecture rtl of can_core is
     signal tran_delay_meas_i       :    std_logic;
     signal tran_valid_i            :    std_logic;
     signal rec_valid_i             :    std_logic;
-    signal ack_received_i          :    std_logic;
     signal br_shifted_i            :    std_logic;
     
     -- Fault confinement status signals
@@ -586,7 +585,6 @@ begin
         decrement_rec           => decrement_rec,       -- OUT
 
         -- Status signals
-        ack_received            => ack_received_i,      -- OUT
         br_shifted              => br_shifted_i,        -- OUT
         form_err                => form_err,            -- OUT
         ack_err                 => ack_err,             -- OUT
@@ -900,6 +898,7 @@ begin
     stat_bus(113)            <= '0';
     stat_bus(115)            <= '0';
     stat_bus(183)            <= '0';
+    stat_bus(255)            <= '0';
     stat_bus(120 downto 118) <= (OTHERS => '0');
     stat_bus(178 downto 158) <= (OTHERS => '0');
 
@@ -1134,9 +1133,6 @@ begin
 
     stat_bus(STAT_ERR_VALID_INDEX) <=
         err_detected_i;
- 
-    stat_bus(STAT_ACK_RECIEVED_OUT_INDEX) <=
-        ack_received_i;
         
     stat_bus(STAT_BIT_ERR_VALID_INDEX) <=
         bit_err;

src/can_core/protocol_control.vhd

@@ -400,9 +400,6 @@ entity protocol_control is
         -----------------------------------------------------------------------
         -- Status signals
         -----------------------------------------------------------------------
-        -- ACK received
-        ack_received            :out  std_logic;
-
         -- Bit rate shifted
         br_shifted              :out  std_logic;
         
@@ -803,7 +800,6 @@ begin
         ssp_reset               => ssp_reset,               -- OUT
         tran_delay_meas         => tran_delay_meas,         -- OUT
         tran_valid              => tran_valid,              -- OUT
-        ack_received            => ack_received,            -- OUT
         crc_enable              => crc_enable,              -- OUT
         crc_spec_enable         => crc_spec_enable,         -- OUT
         crc_calc_from_rx        => crc_calc_from_rx,        -- OUT

src/can_core/protocol_control_fsm.vhd

@@ -500,9 +500,6 @@ entity protocol_control_fsm is
         -- Transmitted frame is valid
         tran_valid              :out   std_logic;
 
-        -- ACK received
-        ack_received            :out   std_logic;
-
         -- CRC calculation enabled
         crc_enable              :out   std_logic;
         
@@ -1405,7 +1402,6 @@ begin
         set_err_active_i <= '0';
         
         br_shifted_i <= '0';
-        ack_received <= '0';
 
         -- Bit Stuffing/Destuffing control
         stuff_length <= std_logic_vector(to_unsigned(5, 3));
@@ -2124,10 +2120,6 @@ begin
                 then
                     ack_err_i <= '1';
                 end if;
-                
-                if (rx_data_nbs = DOMINANT) then
-                    ack_received <= '1';
-                end if;
 
             -------------------------------------------------------------------
             -- Secondary ACK field (in FD Frames),or ACK Delimiter if RECESSIVE
@@ -2148,10 +2140,6 @@ begin
                     crc_err_i <= '1';
                 end if;
 
-                if (rx_data_nbs = DOMINANT) then
-                    ack_received <= '1';
-                end if;
-
             -------------------------------------------------------------------
             -- ACK Delimiter
             -------------------------------------------------------------------

src/lib/can_components.vhd

@@ -1882,9 +1882,6 @@ package can_components is
         -- Transmitted frame is valid
         tran_valid              :out   std_logic;
 
-        -- ACK received
-        ack_received            :out   std_logic;
-
         -- CRC calculation enabled
         crc_enable              :out   std_logic;
         
@@ -2245,9 +2242,6 @@ package can_components is
         -----------------------------------------------------------------------
         -- Status signals
         -----------------------------------------------------------------------
-        -- ACK received
-        ack_received            :out  std_logic;
-
         -- Bit rate shifted
         br_shifted              :out  std_logic;
         

src/lib/drv_stat_pkg.vhd

@@ -371,8 +371,6 @@ package drv_stat_pkg is
     constant STAT_EWL_REACHED_INDEX : natural := 253;
     constant STAT_ERR_VALID_INDEX : natural := 254;
 
-    constant STAT_ACK_RECIEVED_OUT_INDEX : natural := 255;
-
     constant STAT_BIT_ERR_VALID_INDEX : natural := 256;
 
     constant STAT_BS_CTR_HIGH : natural := 302;

test/unit/Protocol_Control/Protocol_Control_tb.vhd

@@ -259,7 +259,6 @@ architecture Protocol_Control_unit_test of CAN_test is
     signal rec_valid_1               :  std_logic;
 
     -- Status signals
-    signal ack_received_1            :  std_logic;
     signal br_shifted_1              :  std_logic;
     signal form_err_1              :  std_logic;
     signal ack_err_1               :  std_logic;
@@ -368,7 +367,6 @@ architecture Protocol_Control_unit_test of CAN_test is
     signal rec_valid_2               :  std_logic;
 
     -- Status signals
-    signal ack_received_2            :  std_logic;
     signal br_shifted_2              :  std_logic;
     signal form_err_2              :  std_logic;
     signal ack_err_2               :  std_logic;
@@ -769,7 +767,6 @@ begin
         rec_valid               => rec_valid_1,
 
         -- Status signals
-        ack_received            => ack_received_1,
         br_shifted              => br_shifted_1,
         form_err              => form_err_1,
         ack_err               => ack_err_1,
@@ -890,7 +887,6 @@ begin
         rec_valid               => rec_valid_2,
 
         -- Status signals
-        ack_received            => ack_received_2,
         br_shifted              => br_shifted_2,
         form_err                => form_err_2,
         ack_err                 => ack_err_2,