try fix the snake bug

1 files changed, 29 insertions, 0 deletions

diff --git a/hdl/tb_pic.vhd b/hdl/tb_pic.vhd
index 2b6f722..75f385c 100644
--- a/hdl/tb_pic.vhd
+++ b/hdl/tb_pic.vhd
@@ -4,6 +4,10 @@ use ieee.numeric_std.all;
 use work.read_intel_hex_pack.all;
 
 entity tb_pic is
+    generic (
+    CLK_FREQ  : positive := 50_000_000;   -- 50M, GW5A clock
+    BAUD_RATE : positive := 115_200
+  );
 end entity tb_pic;
 
 architecture behavioural of tb_pic is
@@ -29,6 +33,10 @@ architecture behavioural of tb_pic is
   -- program memory: 1024 x 14-bit
   signal prog_mem : program_array := (others => (others => '0'));
 
+  signal byte_in : std_logic_vector(7 downto 0);
+  signal tx_should_send : std_logic;
+  
+  
 begin
 
   clk <= not clk after T_clk / 2 when not done else unaffected;
@@ -53,6 +61,27 @@ begin
       uart_rx            => uart_rx
     );
 
+  tx_should_send <= '1';
+  byte_in <= x"FC";
+  
+  uart_master: 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 => tx_should_send,
+      byte_in        => byte_in,
+      tx_done        => open,
+      baud_tick      => open,
+      uart_tx        => uart_rx,
+      uart_rx        => uart_tx,
+      rd_en          => '0',
+      rx_data        => open,
+      rx_empty       => open,
+      rx_full        => open);
+  
   stimulus : process is
     variable mem : program_array;
   begin