X-Git-Url: https://hackdaworld.org/gitweb/?p=my-code%2Ffpga.git;a=blobdiff_plain;f=switch2usb%2Fs2usb.vhd;fp=switch2usb%2Fs2usb.vhd;h=5b80e44a1b7822802cedcd82cf14f37efc51520c;hp=0000000000000000000000000000000000000000;hb=a62a3973f707bfef2a906f6477403ad95c6090df;hpb=428f6220f2ed679f658e077d8c30cc29958e1f26

diff --git a/switch2usb/s2usb.vhd b/switch2usb/s2usb.vhd
new file mode 100644
index 0000000..5b80e44
--- /dev/null
+++ b/switch2usb/s2usb.vhd
@@ -0,0 +1,52 @@
+library IEEE;
+use IEEE.STD_LOGIC_1164.ALL;
+use IEEE.STD_LOGIC_ARITH.ALL;
+use IEEE.STD_LOGIC_UNSIGNED.ALL;
+
+entity s2usb is
+    Port ( switch : in  STD_LOGIC_VECTOR (7 downto 0);
+           -- button : in  STD_LOGIC;
+			  clock : in STD_LOGIC;
+			  usb_full : in  STD_LOGIC;
+           usb_data : out  STD_LOGIC_VECTOR (7 downto 0);
+           usb_fifo_addr : out  STD_LOGIC_VECTOR (1 downto 0);
+           usb_write : out  STD_LOGIC;
+           usb_pktend : out  STD_LOGIC;
+			  usb_cs : out STD_LOGIC;
+			  led : out std_logic_vector(7 downto 0));
+end s2usb;
+
+architecture Behavioral of s2usb is
+
+signal prescaler : std_logic_vector(2 downto 0) := "000";
+signal state : std_logic := '1';
+
+begin
+
+usb_send : process(clock)
+begin
+
+	if(clock'event) and (clock='1') then
+		prescaler <= prescaler + 1;
+		if(prescaler="000") then
+			if(usb_full='1') then
+				if(state='1') then
+					state <= '0';
+				elsif(state='0') then
+					state <= '1';
+				end if;
+				usb_write <= state;
+			end if;
+		end if;
+	end if;
+	
+end process;
+
+usb_fifo_addr <= "10"; -- ep6
+usb_data <= switch;
+usb_cs <= '0';
+usb_pktend <= '1';
+led <= switch;
+
+end Behavioral;
+