Add assignments for digital design

8 files changed, 247 insertions, 104 deletions

diff --git a/sem6/dig/common.mk b/sem6/dig/common.mk
new file mode 100644
index 0000000..266511b
--- /dev/null
+++ b/sem6/dig/common.mk
@@ -0,0 +1,29 @@
+
+
+all: $(INPUTFILES)
+
+.PHONY: all clean
+
+%.o: %.vhdl
+	ghdl -a $^
+
+$(INPUTFILES): %: %.o
+	ghdl -e $@
+
+test_%.vhdl: %.vhdl ../generate_test_file.py
+	../generate_test_file.py $< $@
+
+test_%: test_%.o
+	ghdl -e $@
+
+run_%: %
+	ghdl -r $^
+
+sim_%: test_% %
+	-./$< --vcd=out.vcd
+
+clean:
+	ghdl --clean
+	rm -f work*.cf
+	rm -f test_*.vhdl
+
diff --git a/sem6/dig/generate_test_file.py b/sem6/dig/generate_test_file.py
new file mode 100755
index 0000000..42b8c8f
--- /dev/null
+++ b/sem6/dig/generate_test_file.py
@@ -0,0 +1,118 @@
+#!/usr/bin/env python
+# WOW THIS IS TERRIBLE
+import json
+import argparse
+import re
+import sys
+import os
+import jinja2 as j2
+
+test_define_re = re.compile("TEST_START(.*)TEST_STOP")
+
+parser = argparse.ArgumentParser()
+parser.add_argument("file", help="vhdl file to read from")
+parser.add_argument("output", help="vhdl file to save to")
+
+args = parser.parse_args()
+
+def load_file_def(fname):
+    filecontent = ""
+    with open(fname, "r") as f:
+        filecontent = f.read()
+
+    groups = test_define_re.search(filecontent).groups()
+    if groups:
+        return json.loads(groups[0])
+    else:
+        print("No def in file", f=sys.stderr)
+
+test_def = load_file_def(args.file)
+name = os.path.splitext(args.file)[0]
+
+def generate_vhdl_file(f, td, name):
+    def tof(s):
+        f.write(s)
+
+    tof(f"""
+library IEEE;
+use IEEE.STD_LOGIC_1164.all;
+
+entity test_{name} is
+end test_{name};
+
+architecture behavior of test_{name} is
+    component {name} is
+        port (
+    """)
+
+    # Generate PORT section
+    first = True
+    for i in td["inputs"]:
+        if not first:
+            tof(";\n")
+        first = False
+        args = i.split(",")
+        if len(args) > 1:
+            tof(f"{args[0]} : IN STD_LOGIC_VECTOR({args[1]} downto {args[2]})")
+        else:
+            # Not a vector
+            tof(f"{args[0]} : IN STD_LOGIC")
+    for o in td["outputs"]:
+        if not first:
+            tof(";\n")
+        first = False
+        args = o.split(",")
+        if len(args) > 1:
+            tof(f"{args[0]} : OUT STD_LOGIC_VECTOR({args[1]} downto {args[2]})")
+        else:
+            # Not a vector
+            tof(f"{args[0]} : OUT STD_LOGIC")
+    tof(");\nend component;\n");
+
+    # Define signals
+    for i in td["inputs"]:
+        args = i.split(",")
+        if len(args) > 1:
+            tof(f"signal in_{args[0]} : STD_LOGIC_VECTOR({args[1]} downto {args[2]});\n")
+        else:
+            # Not a vector
+            tof(f"signal in_{args[0]} : STD_LOGIC;\n")
+    for i in td["outputs"]:
+        args = i.split(",")
+        if len(args) > 1:
+            tof(f"signal out_{args[0]} : STD_LOGIC_VECTOR({args[1]} downto {args[2]});\n")
+        else:
+            # Not a vector
+            tof(f"signal out_{args[0]} : STD_LOGIC;\n")
+    tof(f"""\nbegin
+        uut: {name} port map(\n""")
+
+    first = True
+    for i in td["inputs"]:
+        if not first:
+            tof(",\n")
+        first = False
+        args = i.split(",")
+        tof(f"{args[0]} => in_{args[0]}")
+    for i in td["outputs"]:
+        if not first:
+            tof(",\n")
+        first = False
+        args = i.split(",")
+        tof(f"{args[0]} => out_{args[0]}")
+    tof(");\n\nstim_proc: process\nbegin\n")
+
+    for t in td["testin"]:
+        for index, i in enumerate(td["inputs"]):
+            args = i.split(",")
+            if len(args) > 1:
+                tof(f"in_{args[0]} <= \"{t[index]}\";")
+            else:
+                tof(f"in_{args[0]} <= '{t[index]}';")
+        tof("wait for 1 fs;")
+    tof("wait;\nend process;\nend;")
+
+
+with open(args.output, "w") as f:
+    generate_vhdl_file(f, test_def, name)
+
diff --git a/sem6/dig/m2/Makefile b/sem6/dig/m2/Makefile
index 2731d67..4f83294 100644
--- a/sem6/dig/m2/Makefile
+++ b/sem6/dig/m2/Makefile
@@ -1,30 +1,4 @@
 
-INPUTFILES=nor_gate
-
-all: $(INPUTFILES)
-
-.PHONY: all clean
-
-%.o: %.vhdl
-	ghdl -a $^
-
-$(INPUTFILES): %: %.o
-	ghdl -e $@
-
-test_%.vhdl: %.vhdl generate_test_file.py
-	./generate_test_file.py $< $@
-
-test_$(INPUTFILES): %: %.o
-	ghdl -e $@
-
-run_%: %
-	ghdl -r $^
-
-sim_%: test_% %
-	-./$< --vcd=out.vcd
-
-clean:
-	ghdl --clean
-	rm -f work*.cf
-	rm -f test_*.vhdl
+INPUTFILES = nor_gate ex2 ex5 ex6
 
+include ../common.mk
diff --git a/sem6/dig/m2/ex2.vhdl b/sem6/dig/m2/ex2.vhdl
new file mode 100644
index 0000000..7fb7168
--- /dev/null
+++ b/sem6/dig/m2/ex2.vhdl
@@ -0,0 +1,17 @@
+-- TEST_START{"inputs": ["sw1", "sw2", "sw3", "sw4"], "outputs": ["LED"], "testin": ["0000", "0001", "0101", "1101"]}TEST_STOP
+LIBRARY IEEE;
+USE IEEE.STD_LOGIC_1164.all;
+
+ENTITY ex2 IS
+    PORT(
+        sw1: IN STD_LOGIC;
+        sw2: IN STD_LOGIC;
+        sw3: IN STD_LOGIC;
+        sw4: IN STD_LOGIC;
+        led: OUT STD_LOGIC);
+END ex2;
+
+ARCHITECTURE impl OF ex2 IS
+BEGIN
+    led <= (sw1 AND sw2) OR NOT(sw3 AND sw4);
+END impl;
diff --git a/sem6/dig/m2/ex5.vhdl b/sem6/dig/m2/ex5.vhdl
new file mode 100644
index 0000000..bfc27b9
--- /dev/null
+++ b/sem6/dig/m2/ex5.vhdl
@@ -0,0 +1,18 @@
+-- TEST_START{"inputs": ["a", "b", "cin"], "outputs": ["o", "cout"], "testin": ["000", "010", "100", "110", "011", "111"]}TEST_STOP
+LIBRARY IEEE;
+USE IEEE.STD_LOGIC_1164.all;
+
+ENTITY ex5 IS
+    PORT(
+        a: IN STD_LOGIC;
+        b: IN STD_LOGIC;
+        cin: IN STD_LOGIC;
+        o: OUT STD_LOGIC;
+        cout: OUT STD_LOGIC);
+END ex5;
+
+ARCHITECTURE impl OF ex5 IS
+BEGIN
+    o <= (a XOR b) XOR cin;
+    cout <= (a AND b) OR (cin AND (a OR b));
+END impl;
diff --git a/sem6/dig/m2/ex6.vhdl b/sem6/dig/m2/ex6.vhdl
new file mode 100644
index 0000000..e920c98
--- /dev/null
+++ b/sem6/dig/m2/ex6.vhdl
@@ -0,0 +1,59 @@
+-- TEST_START{"inputs": ["cin", "a,3,0", "b,3,0"], "outputs": ["carry", "output,3,0"], "testin": [["0", "0001", "0001"], ["0", "0101", "1010"], ["0", "1111", "1111"], ["1", "0000", "0000"]]}TEST_STOP
+LIBRARY IEEE;
+USE IEEE.STD_LOGIC_1164.all;
+
+ENTITY ex6 IS
+    PORT(
+        a : IN STD_LOGIC_VECTOR(3 downto 0);
+        b : IN STD_LOGIC_VECTOR(3 downto 0);
+        cin: IN STD_LOGIC;
+        output: OUT STD_LOGIC_VECTOR(3 downto 0);
+        carry : OUT STD_LOGIC
+    );
+END ex6;
+
+ARCHITECTURE impl OF ex6 IS
+    SIGNAL c1 : STD_LOGIC;
+    SIGNAL c2 : STD_LOGIC;
+    SIGNAL c3 : STD_LOGIC;
+    SIGNAL c4 : STD_LOGIC;
+
+BEGIN
+
+    add1 : ENTITY work.ex5
+    PORT MAP (
+                 a => a(0),
+                 b => b(0),
+                 cin => cin,
+                 o => output(0),
+                 cout => c1
+             );
+
+    add2 : ENTITY work.ex5
+    PORT MAP (
+                 a => a(1),
+                 b => b(1),
+                 cin => c1,
+                 o => output(1),
+                 cout => c2
+             );
+
+    add3 : ENTITY work.ex5
+    PORT MAP (
+                 a => a(2),
+                 b => b(2),
+                 cin => c2,
+                 o => output(2),
+                 cout => c3
+             );
+
+    add4 : ENTITY work.ex5
+    PORT MAP (
+                 a => a(3),
+                 b => b(3),
+                 cin => c3,
+                 o => output(3),
+                 cout => carry
+             );
+END impl;
+
diff --git a/sem6/dig/m2/generate_test_file.py b/sem6/dig/m2/generate_test_file.py
deleted file mode 100755
index c450f02..0000000
--- a/sem6/dig/m2/generate_test_file.py
+++ /dev/null
@@ -1,76 +0,0 @@
-#!/usr/bin/env python
-import json
-import argparse
-import re
-import sys
-import os
-import jinja2 as j2
-
-test_define_re = re.compile("TEST_START(.*)TEST_STOP")
-
-parser = argparse.ArgumentParser()
-parser.add_argument("file", help="vhdl file to read from")
-parser.add_argument("output", help="vhdl file to save to")
-
-args = parser.parse_args()
-
-def load_file_def(fname):
-    filecontent = ""
-    with open(fname, "r") as f:
-        filecontent = f.read()
-
-    groups = test_define_re.search(filecontent).groups()
-    if groups:
-        return json.loads(groups[0])
-    else:
-        print("No def in file", f=sys.stderr)
-
-test_def = load_file_def(args.file)
-name = os.path.splitext(args.file)[0]
-
-# Generate test file, by running all inputs TODO make this more configurable
-
-testbed_template = j2.Template("""
-library IEEE;
-use IEEE.STD_LOGIC_1164.all;
-
-entity test_{{name}} is
-end test_{{name}};
-
-architecture behavior of test_{{name}} is
-    component {{name}} is
-        port (
-            {% for input in inputs %}{{input}}: in std_logic;
-            {% endfor %}{% for output in outputs %}{{output}}: out std_logic{% if not loop.last %};{% endif %}
-            {% endfor %});
-    end component;
-    signal input  : std_logic_vector({{ num_inputs - 1 }} downto 0);
-    signal output : std_logic_vector({{ num_inputs - 1 }} downto 0);
-begin
-    uut: {{name}} port map (
-        {% for input in inputs %}{{input}} => input({{loop.index-1}}),
-        {% endfor %}{% for output in outputs %}{{output}} => output({{loop.index-1}}){% if not loop.last %},{% endif %}{% endfor %}
-    );
-
-    stim_proc: process
-    begin
-        {% for test in testin %}
-        input <= "{{test}}"; wait for 1 fs;
-        {% endfor %}
-        wait;
-    end process;
-end;
-""")
-
-render = testbed_template.render(
-    name=name,
-    inputs=test_def["inputs"],
-    num_inputs=len(test_def["inputs"]),
-    outputs=test_def["outputs"],
-    num_outputs=len(test_def["outputs"]),
-    testin=test_def["testin"]
-    )
-
-with open(args.output, "w") as f:
-    print(render, file=f)
-
diff --git a/sem6/dig/template.mk b/sem6/dig/template.mk
new file mode 100644
index 0000000..0232d3a
--- /dev/null
+++ b/sem6/dig/template.mk
@@ -0,0 +1,4 @@
+
+INPUTFILES=nor_gate
+
+include ../common.mk