1 files changed, 0 insertions, 181 deletions
diff --git a/PIC/PIC.vhd b/PIC/PIC.vhd
deleted file mode 100644
index a31bec7..0000000
--- a/PIC/PIC.vhd
+++ /dev/null
@@ -1,181 +0,0 @@
-library ieee;
-use ieee.std_logic_1164.all;
-use ieee.numeric_std.all;
-use work.alu_types.all;
-
-entity PIC is
-  generic (
-    CLK_FREQ  : positive := 50_000_000;   -- 50M, GW5A clock
-    BAUD_RATE : positive := 115_200
-  );
-  port (
-    clk    : in std_logic;
-    reset  : in std_logic;
-    opcode : in std_logic_vector(13 downto 0);
-
-    program_counter    : out std_logic_vector(12 downto 0) := (others => '0');
-    instruction_return : out std_logic := '0';
-    work_reg           : out std_logic_vector(7 downto 0) := (others => '0');
-    status             : out std_logic_vector(2 downto 0) := (others => '0');
-    port_a             : out std_logic_vector(7 downto 0) := (others => '0');
-    port_b             : out std_logic_vector(7 downto 0) := (others => '0');
-
-    -- UART physical pins
-    uart_tx : out std_logic;
-    uart_rx : in  std_logic
-  );
-end entity PIC;
-
-architecture rtl of PIC is
-  signal W : std_logic_vector(7 downto 0) := (others => '0');
-
-  signal alu_operation : alu_op;
-  signal alu_result    : std_logic_vector(7 downto 0);
-  signal alu_skip      : std_logic;
-
-  signal mem_q       : std_logic_vector(7 downto 0);
-  signal mem_qstatus : std_logic_vector(2 downto 0);
-  signal mem_we      : std_logic;
-  signal mem_re      : std_logic;
-
-  signal bit_select : std_logic_vector(2 downto 0);
-  signal addr       : std_logic_vector(6 downto 0);
-  signal sm_data    : std_logic_vector(7 downto 0);
-  signal sm_pc      : std_logic_vector(12 downto 0);
-  signal we_w       : std_logic;
-  signal instr_ret  : std_logic;
-  signal alu_status : std_logic_vector(2 downto 0);
-
-  signal use_literal : std_logic;
-  signal we_status   : std_logic;
-  signal b_operand   : std_logic_vector(7 downto 0);
-
-  signal stack_push : std_logic;
-  signal stack_pop  : std_logic;
-  signal stack_din  : std_logic_vector(12 downto 0);
-  signal stack_dout : std_logic_vector(12 downto 0);
-
-  -- UART <-> dpram bridge signals
-  signal uart_tx_byte  : std_logic_vector(7 downto 0);
-  signal uart_tx_send  : std_logic;
-  signal uart_tx_done  : std_logic;
-  signal uart_rx_byte  : std_logic_vector(7 downto 0);
-  signal uart_rx_rd_en : std_logic;
-  signal uart_rx_empty : std_logic;
-  signal uart_rx_full  : std_logic;
-
-begin
-
-  work_reg           <= W;
-  program_counter    <= sm_pc;
-  instruction_return <= instr_ret;
-  status             <= alu_status;
-
-  b_operand_select : process(use_literal, sm_data, mem_q)
-  begin
-    if use_literal = '1' then
-      b_operand <= sm_data;
-    else
-      b_operand <= mem_q;
-    end if;
-  end process;
-
-  w_reg : process(clk)
-  begin
-    if rising_edge(clk) then
-      if we_w = '1' then
-        W <= alu_result;
-      end if;
-    end if;
-  end process w_reg;
-
-  sm : entity work.state_machine(rtl)
-    port map (
-      clk         => clk,
-      opcode      => opcode,
-      reset       => reset,
-      op          => alu_operation,
-      we_mem      => mem_we,
-      re_mem      => mem_re,
-      we_w        => we_w,
-      instr_ret   => instr_ret,
-      bit_select  => bit_select,
-      data        => sm_data,
-      pc          => sm_pc,
-      addr        => addr,
-      use_literal => use_literal,
-      we_status   => we_status,
-      stack_push  => stack_push,
-      stack_pop   => stack_pop,
-      stack_din   => stack_din,
-      stack_dout  => stack_dout,
-      alu_skip    => alu_skip,
-      alu_result  => alu_result
-      );
-
-  alu : entity work.alu(rtl)
-    port map (
-      a          => W,
-      b          => b_operand,
-      op         => alu_operation,
-      bit_select => bit_select,
-      status_in  => mem_qstatus,
-      result     => alu_result,
-      status     => alu_status,
-      skip       => alu_skip
-      );
-
-  stk : entity work.stack(rtl)
-    port map (
-      clk   => clk,
-      reset => reset,
-      push  => stack_push,
-      pop   => stack_pop,
-      din   => stack_din,
-      dout  => stack_dout
-    );
-
-  mem : entity work.dpram(rtl)
-    generic map (DEPTH => 128)
-    port map (
-      clk           => clk,
-      we            => mem_we,
-      re            => mem_re,
-      d             => alu_result,
-      d_status      => "00000" & alu_status,
-      addr          => addr,
-      q             => mem_q,
-      q_status      => mem_qstatus,
-      port_a        => port_a,
-      port_b        => port_b,
-      we_status     => we_status,
-      uart_tx_byte  => uart_tx_byte,
-      uart_tx_send  => uart_tx_send,
-      uart_tx_done  => uart_tx_done,
-      uart_rx_byte  => uart_rx_byte,
-      uart_rx_rd_en => uart_rx_rd_en,
-      uart_rx_empty => uart_rx_empty,
-      uart_rx_full  => uart_rx_full
-    );
-
-  uart_inst : entity work.uart
-    generic map (
-      CLK_FREQ     => CLK_FREQ,
-      BAUD_RATE    => BAUD_RATE,
-      CLKS_PER_BIT => CLK_FREQ / BAUD_RATE
-    )
-    port map (
-      clk            => clk,
-      tx_should_send => uart_tx_send,
-      byte_in        => uart_tx_byte,
-      tx_done        => uart_tx_done,
-      baud_tick      => open,
-      uart_tx        => uart_tx,
-      uart_rx        => uart_rx,
-      rd_en          => uart_rx_rd_en,
-      rx_data        => uart_rx_byte,
-      rx_empty       => uart_rx_empty,
-      rx_full        => uart_rx_full
-    );
-
-end architecture rtl;