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Diffstat (limited to 'machxo2/examples/tinyfpga.vhd')
-rw-r--r-- | machxo2/examples/tinyfpga.vhd | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/machxo2/examples/tinyfpga.vhd b/machxo2/examples/tinyfpga.vhd new file mode 100644 index 00000000..29705728 --- /dev/null +++ b/machxo2/examples/tinyfpga.vhd @@ -0,0 +1,38 @@ +library ieee ; +context ieee.ieee_std_context; + +use work.components.all; + +entity top is + port ( + pin1: out std_logic + ); + + attribute LOC: string; + attribute LOC of pin1: signal is "13"; +end; + +architecture arch of top is + signal clk: std_logic; + signal led_timer: unsigned(23 downto 0) := (others=>'0'); +begin + + internal_oscillator_inst: OSCH + generic map ( + NOM_FREQ => "16.63" + ) + port map ( + STDBY => '0', + OSC => clk + ); + + process(clk) + begin + if rising_edge(clk) then + led_timer <= led_timer + 1; + end if; + end process; + + pin1 <= led_timer(led_timer'left); + +end; |