From: hackbard Date: Wed, 26 Dec 2007 01:03:42 +0000 (+0100) Subject: added vhd (test) code switch2usb (not working for known reasons, fixed @ccc) X-Git-Url: https://hackdaworld.org/gitweb/?a=commitdiff_plain;h=a62a3973f707bfef2a906f6477403ad95c6090df;p=my-code%2Ffpga.git added vhd (test) code switch2usb (not working for known reasons, fixed @ccc) --- diff --git a/switch2usb/s2u.ucf b/switch2usb/s2u.ucf new file mode 100644 index 0000000..4fa702b --- /dev/null +++ b/switch2usb/s2u.ucf @@ -0,0 +1,32 @@ +net "clock" loc="A8"; +net "switch<0>" loc="N15"; +net "switch<1>" loc="J16"; +net "switch<2>" loc="K16"; +net "switch<3>" loc="K15"; +net "switch<4>" loc="L15"; +net "switch<5>" loc="M16"; +net "switch<6>" loc="M15"; +net "switch<7>" loc="N16"; +#net "button" loc="K12"; +net "usb_full" loc="P7"; +net "usb_data<0>" loc="N12"; +net "usb_data<1>" loc="P12"; +net "usb_data<2>" loc="N11"; +net "usb_data<3>" loc="P11"; +net "usb_data<4>" loc="N10"; +net "usb_data<5>" loc="P10"; +net "usb_data<6>" loc="M10"; +net "usb_data<7>" loc="R10"; +net "usb_fifo_addr<0>" loc="P5"; +net "usb_fifo_addr<1>" loc="M7"; +net "usb_write" loc="T5"; +net "usb_pktend" loc="M6"; +net "usb_cs" loc="T8"; +net "led<0>" loc="L14"; +net "led<1>" loc="L13"; +net "led<2>" loc="M14"; +net "led<3>" loc="L12"; +net "led<4>" loc="N14"; +net "led<5>" loc="M13"; +net "led<6>" loc="P14"; +net "led<7>" loc="R16"; \ No newline at end of file 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; +