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author | Tristan Gingold <tgingold@free.fr> | 2017-02-02 21:35:01 +0100 |
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committer | Tristan Gingold <tgingold@free.fr> | 2017-02-02 21:35:01 +0100 |
commit | bd7e5c9457471bb24d825574c9aa3d9a3af63c03 (patch) | |
tree | 194781d16b082ae259f17dd8dc12b84b04ec7105 /ice40hx8k | |
parent | fa2166d5bbf07ffc764b2e562f1eaf8ae3b4f1b6 (diff) | |
download | ghdl-yosys-plugin-bd7e5c9457471bb24d825574c9aa3d9a3af63c03.tar.gz ghdl-yosys-plugin-bd7e5c9457471bb24d825574c9aa3d9a3af63c03.tar.bz2 ghdl-yosys-plugin-bd7e5c9457471bb24d825574c9aa3d9a3af63c03.zip |
Add examples
Diffstat (limited to 'ice40hx8k')
-rw-r--r-- | ice40hx8k/leds.vhdl | 8 | ||||
-rw-r--r-- | ice40hx8k/pinmap.pcf | 13 | ||||
-rw-r--r-- | ice40hx8k/spin1.vhdl | 51 | ||||
-rw-r--r-- | ice40hx8k/spin2.vhdl | 29 |
4 files changed, 101 insertions, 0 deletions
diff --git a/ice40hx8k/leds.vhdl b/ice40hx8k/leds.vhdl new file mode 100644 index 0000000..557585b --- /dev/null +++ b/ice40hx8k/leds.vhdl @@ -0,0 +1,8 @@ +library ieee; +use ieee.std_logic_1164.all; +use ieee.numeric_std.all; + +entity leds is + port (clk : in std_logic; + led1, led2, led3, led4, led5, led6, led7, led8 : out std_logic); +end leds; diff --git a/ice40hx8k/pinmap.pcf b/ice40hx8k/pinmap.pcf new file mode 100644 index 0000000..6862c43 --- /dev/null +++ b/ice40hx8k/pinmap.pcf @@ -0,0 +1,13 @@ +# example.pcf +set_io --warn-no-port led1 B5 +set_io --warn-no-port led2 B4 +set_io --warn-no-port led3 A2 +set_io --warn-no-port led4 A1 +set_io --warn-no-port led5 C5 +set_io --warn-no-port led6 C4 +set_io --warn-no-port led7 B3 +set_io --warn-no-port led8 C3 +set_io --warn-no-port clk J3 +# FTDI +set_io --warn-no-port ftdi_tx B12 +set_io --warn-no-port ftdi_rx B10 diff --git a/ice40hx8k/spin1.vhdl b/ice40hx8k/spin1.vhdl new file mode 100644 index 0000000..79e305c --- /dev/null +++ b/ice40hx8k/spin1.vhdl @@ -0,0 +1,51 @@ +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; diff --git a/ice40hx8k/spin2.vhdl b/ice40hx8k/spin2.vhdl new file mode 100644 index 0000000..ccdab8b --- /dev/null +++ b/ice40hx8k/spin2.vhdl @@ -0,0 +1,29 @@ +architecture spin2 of leds is + signal clk_4hz: std_logic; + signal leds : std_ulogic_vector (1 to 8) := "11000000"; +begin + (led1, led2, led3, led4, led5, led6, led7, led8) <= leds; + + 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 <= '1'; + else + counter := counter + 1; + clk_4hz <= '0'; + end if; + end if; + end process; + + process (clk) + begin + if rising_edge(clk) and clk_4hz = '1' then + -- Rotate + leds <= (leds (8), leds (1), leds (2), leds (3), leds (4), leds (5), leds (6), leds (7)); + end if; + end process; +end spin2; |