libraries and signal generation

examples/binary_counter.vhdl

@@ -1,5 +1,6 @@
 library ieee;
   use ieee.std_logic_1164.all;
+  use ieee.numeric_std_unsigned.all;
 
 entity binary_counter is
   port(
@@ -14,34 +15,35 @@ end entity;
 
 architecture scratch of binary_counter is
 
-  signal run : std_logic;
   signal cnt : integer range 0 to 15;
+  signal run : std_logic;
 
 begin
 
+  leds <= to_stdulogicvector(cnt);
+
   process(clk)
   begin
-  if rising_edge(clk) then
-    if reset = '1' then
-      run <= '0';
-      cnt <= 0;
-    else
-      if buttons(0) = '1' then
-        run <= '1';
-      elsif buttons(1) = '1' then
+    if rising_edge(clk) then
+      if reset = '1' then
         run <= '0';
-      end if;
-      if (run = '1') and (incr = '1') then
-        -- to prevent natural overflow
-        if cnt = 15 then
-          cnt <= 0;
-        else
-          cnt <= cnt;
+        cnt <= 0;
+      else
+        if buttons(0) = '1' then
+          run <= '1';
+        elsif buttons(1) = '1' then
+          run <= '0';
+        end if;
+        if (run = '1') and (incr = '1') then
+          -- to prevent natural overflow
+          if cnt = 15 then
+            cnt <= 0;
+          else
+            cnt <= cnt;
+          end if;
         end if;
       end if;
     end if;
-  end if;
-
   end process;
 
 end architecture;

examples/binary_counter.vhdl.sbd

@@ -1 +1 @@
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examples/binary_counter.vhdl.sbe

@@ -4,6 +4,11 @@
         "reset"   : ["in",  "std_logic"],
         "incr"    : ["in",  "std_logic"],
         "buttons" : ["in",  "std_logic_vector(3 downto 0)"],
-        "leds"    : ["out", "std_logic_vector(3 downto 0)", "0000"]
+        "leds"    : ["out", "std_logic_vector(3 downto 0)"]
+    },
+    "libraries": {
+        "ieee": {
+            "numeric_std_unsigned": "ieee.numeric_std_unsigned.sbi"
+        }
     }
 }

examples/button_driven.vhdl.sbe

@@ -4,7 +4,7 @@
         "reset"   : ["in",  "std_logic"],
         "incr"    : ["in",  "std_logic"],
         "buttons" : ["in",  "std_logic_vector(3 downto 0)"],
-        "leds"    : ["out", "std_logic_vector(3 downto 0)", "0000"]
+        "leds"    : ["out", "std_logic_vector(3 downto 0)"]
     },
     "name": "led4_button4"
 }

examples/ieee.numeric_std_unsigned.sbi

@@ -0,0 +1,20 @@
+([
+    {
+        "block": {
+            "kind": "block",
+            "type": "ieee.numeric_std_unsigned_to_stdulogicvector",
+            "message0": "to_stdulogicvector %1",
+            colour,
+            "args0": [
+                {
+                    "type": "input_value",
+                    "name": "NUM"
+                }
+            ],
+            "output": null,
+        },
+        "generator": function (block) {
+            return ["to_stdulogicvector(" + generator.valueToCode(block, "NUM", generator.ORDER_NONE) + ")", generator.ORDER_FUNCTION_CALL]
+        }
+    }
+])