7 files changed, 152 insertions, 0 deletions
diff --git a/examples/icezum/Makefile b/examples/icezum/Makefile
new file mode 100644
index 0000000..ab6f5d7
--- /dev/null
+++ b/examples/icezum/Makefile
@@ -0,0 +1,23 @@
+PROJ ?= blink
+PIN_DEF = icezum.pcf
+DEVICE = hx1k
+
+all: report bin
+
+json: $(PROJ).vhdl
+	yosys -m ghdl -p 'ghdl $(PROJ).vhdl -e $(PROJ); synth_ice40 -json $@'
+
+asc: $(PIN_DEF) json
+	nextpnr-ice40 --$(DEVICE) --json json --pcf $(PIN_DEF) --asc $@
+
+bin: asc
+	icepack $< $@
+
+report: asc
+	icetime -d $(DEVICE) -mtr $@ $<
+
+clean:
+	rm -f json asc bin report work-obj93.cf
+
+.SECONDARY:
+.PHONY: all prog clean
diff --git a/examples/icezum/blink.vhdl b/examples/icezum/blink.vhdl
new file mode 100644
index 0000000..81c32ed
--- /dev/null
+++ b/examples/icezum/blink.vhdl
@@ -0,0 +1,35 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+entity blink is
+  port (
+    clk : in std_logic;
+    led0, led1, led2, led3, led4, led5, led6, led7 : out std_logic
+  );
+end blink;
+
+architecture synth of blink is
+  signal blink: std_logic;
+begin
+  process (clk)
+    variable cnt : unsigned (23 downto 0);  -- 3_000_000 requires 24 bits
+  begin
+    if rising_edge(clk) then
+      if cnt = 2_999_999 then
+        cnt := x"000000";
+        blink <= not blink;
+      else
+        cnt := cnt + 1;
+      end if;
+    end if;
+  end process;
+  led0 <= blink;
+  led1 <= blink;
+  led2 <= blink;
+  led3 <= blink;
+  led4 <= blink;
+  led5 <= blink;
+  led6 <= blink;
+  led7 <= blink;
+end synth;
diff --git a/examples/icezum/counter.vhdl b/examples/icezum/counter.vhdl
new file mode 100644
index 0000000..9cc4d7e
--- /dev/null
+++ b/examples/icezum/counter.vhdl
@@ -0,0 +1,35 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+entity counter is
+  port (
+    clk : in std_logic;
+    led0, led1, led2, led3, led4, led5, led6, led7 : out std_logic
+  );
+end counter;
+
+architecture synth of counter is
+  signal clk_6hz : std_logic;
+begin
+  -- Presscaler
+  prescaler: process(clk)
+    variable timer : unsigned (20 downto 0) := (others=>'0');
+  begin
+    if rising_edge(clk) then
+      timer := timer + 1;
+      clk_6hz <= timer(20);
+    end if;
+  end process;
+
+  -- 8 bits counter
+  process (clk_6hz)
+    variable temp : unsigned (7 downto 0);
+  begin
+    if rising_edge(clk_6hz) then
+      temp:= temp + 1;
+      -- Show the counter on the icezum Alhambra leds
+      (led7, led6, led5, led4, led3, led2, led1, led0) <= temp;
+    end if;
+  end process;
+end synth;
diff --git a/examples/icezum/icezum.pcf b/examples/icezum/icezum.pcf
new file mode 100644
index 0000000..9ea27ad
--- /dev/null
+++ b/examples/icezum/icezum.pcf
@@ -0,0 +1,13 @@
+set_io sw1  10
+set_io sw2  11
+
+set_io clk 21
+
+set_io led0 95
+set_io led1 96
+set_io led2 97
+set_io led3 98
+set_io led4 99
+set_io led5 101
+set_io led6 102
+set_io led7 104
diff --git a/examples/icezum/led_on.vhdl b/examples/icezum/led_on.vhdl
new file mode 100644
index 0000000..a67ead4
--- /dev/null
+++ b/examples/icezum/led_on.vhdl
@@ -0,0 +1,15 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+entity led_on is
+  port (led0, led1, led2, led3, led4, led5, led6, led7 : out std_logic);
+end led_on;
+
+architecture test of led_on is
+begin
+  -- Turn on the Led0
+  led0 <= '1';
+  -- Turn off the other leds
+  (led1, led2, led3, led4, led5, led6, led7) <= std_logic_vector'("0000000");
+end test;
diff --git a/examples/icezum/pushbutton.vhdl b/examples/icezum/pushbutton.vhdl
new file mode 100644
index 0000000..55ede2f
--- /dev/null
+++ b/examples/icezum/pushbutton.vhdl
@@ -0,0 +1,18 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+entity pushbutton is
+  port (
+    sw1, sw2   : in std_logic;
+    led0, led7 : out std_logic
+  );
+end pushbutton;
+
+architecture synth of pushbutton is
+  signal a : std_logic;
+begin
+  a    <= sw1 and sw2;
+  led0 <= a;
+  led7 <= not a;
+end synth;
diff --git a/examples/icezum/test.sh b/examples/icezum/test.sh
new file mode 100755
index 0000000..72da526
--- /dev/null
+++ b/examples/icezum/test.sh
@@ -0,0 +1,13 @@
+#!/usr/bin/env sh
+
+cd $(dirname $0)
+
+DOCKER_CMD="docker run --rm -v /$(pwd)://wrk -w //wrk"
+
+mkdir -p build
+
+for prj in blink counter led_on pushbutton; do
+  $DOCKER_CMD ghdl/synth:beta     yosys -m ghdl -p "ghdl $prj.vhdl -e $prj; synth_ice40 -json build/json"
+  $DOCKER_CMD ghdl/synth:nextpnr  nextpnr-ice40 --hx1k --json build/json --pcf icezum.pcf --asc build/asc
+  $DOCKER_CMD ghdl/synth:icestorm icepack build/asc build/$prj.bin
+done