diff options
Diffstat (limited to 'icestick/blink.vhdl')
-rw-r--r-- | icestick/blink.vhdl | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/icestick/blink.vhdl b/icestick/blink.vhdl new file mode 100644 index 0000000..d7e6dd4 --- /dev/null +++ b/icestick/blink.vhdl @@ -0,0 +1,23 @@ +architecture blink of leds is + signal clk_4hz: std_logic; +begin + process (clk) + -- 3_000_000 is 0x2dc6c0 + variable counter : unsigned (23 downto 0); + begin + if rising_edge(clk) then + if counter = 2_999_999 then + counter := x"000000"; + clk_4hz <= not clk_4hz; + else + counter := counter + 1; + end if; + end if; + end process; + + led1 <= clk_4hz; + led2 <= clk_4hz; + led3 <= clk_4hz; + led4 <= clk_4hz; + led5 <= clk_4hz; +end blink; |