Improve examples for Lattice iCEstick

- move "leds" examples to subdirectory
- add Makefile
- add *.json files to .gitignore
- adjust README.md and fix some typos

1 files changed, 0 insertions, 51 deletions

diff --git a/examples/icestick/spin2.vhdl b/examples/icestick/spin2.vhdl
deleted file mode 100644
index 0f23964..0000000
--- a/examples/icestick/spin2.vhdl
+++ /dev/null
@@ -1,51 +0,0 @@
-architecture spin1 of leds is
-  signal nrst : std_logic := '0';
-  signal clk_4hz: std_logic;
-  signal leds : std_ulogic_vector (1 to 5);
-begin
-  (led1, led2, led3, led4, led5) <= leds;
-
-  process (clk)
-    variable cnt : unsigned (1 downto 0) := "00";
-  begin
-    if rising_edge (clk) then
-      if cnt = 3 then
-        nrst <= '1';
-      else
-        cnt := cnt + 1;
-      end if;
-    end if;
-  end process;
-
-  process (clk)
-    --  3_000_000 is 0x2dc6c0
-    variable counter : unsigned (23 downto 0);
-  begin
-    if rising_edge(clk) then
-      if nrst = '0' then
-        counter := x"000000";
-      else
-        if counter = 2_999_999 then
-          counter := x"000000";
-          clk_4hz <= '1';
-        else
-          counter := counter + 1;
-          clk_4hz <= '0';
-        end if;
-      end if;
-    end if;
-  end process;
-
-  process (clk)
-  begin
-    if rising_edge(clk) then
-      if nrst = '0' then
-        -- Initialize
-        leds <= "11000";
-      elsif clk_4hz = '1' then
-        --  Rotate
-        leds <= leds (4) & leds (1) & leds (2) & leds (3) & '0';
-      end if;
-    end if;
-  end process;
-end spin1;