From 8a36990c0305ea2effba5e869351b902ecb429b0 Mon Sep 17 00:00:00 2001
From: Martin Peach <mrpeach@users.sourceforge.net>
Date: Tue, 20 Mar 2007 16:06:17 +0000
Subject: CMOS digital logic emulation objects

svn path=/trunk/externals/mrpeach/; revision=7509
---
 cmos/cd4001.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100755 cmos/cd4001.c

(limited to 'cmos/cd4001.c')

diff --git a/cmos/cd4001.c b/cmos/cd4001.c
new file mode 100755
index 0000000..0fbbfb9
--- /dev/null
+++ b/cmos/cd4001.c
@@ -0,0 +1,85 @@
+/* cd4001.c MP 20070312 */
+/* Emulate a cd4001b */
+#include "m_pd.h"
+
+typedef struct _cd4001
+{
+    t_object        x_obj;
+    t_int           x_in1;
+    t_int           x_in2;
+    t_outlet        *x_out;
+    t_inlet         *x_inlet2;/* Second inlet is 'live' like the first */
+} t_cd4001;
+
+static t_class *cd4001_class;
+
+void cd4001_setup(void);
+static void *cd4001_new(t_symbol *s, int argc, t_atom *argv);
+static void cd4001_free(t_cd4001 *x);
+static void cd4001_bang(t_cd4001 *x);
+static void cd4001_float(t_cd4001 *x, t_float f);
+static void cd4001_inlet2(t_cd4001 *x, t_float f);
+static void cd4001_update_outlets(t_cd4001 *x);
+
+static void cd4001_float(t_cd4001 *x, t_float f)
+{
+    if (f == 1) x->x_in1 = 1;
+    else if (f == 0) x->x_in1 = 0;
+    else
+    {
+        post("cd4001 inlet 2 accepts 1 or 0.");
+        return;
+    }
+    cd4001_update_outlets(x);
+}
+
+static void cd4001_bang(t_cd4001 *x)
+{
+    cd4001_update_outlets(x);
+}
+
+static void cd4001_inlet2(t_cd4001 *x, t_float f)
+{
+    if (f == 1) x->x_in2 = 1;
+    else if (f == 0) x->x_in2 = 0;
+    else
+    {
+        post("cd4001 inlet 2 accepts 1 or 0.");
+        return;
+    }
+    cd4001_update_outlets(x);
+}
+
+static void cd4001_update_outlets(t_cd4001 *x)
+{ /* Double NOR function */
+    outlet_float(x->x_out, ((x->x_in1 + x->x_in2) != 0)?0:1);
+}
+
+static void cd4001_free(t_cd4001 *x)
+{
+    return;
+}
+
+static void *cd4001_new(t_symbol *s, int argc, t_atom *argv)
+{
+    t_cd4001           *x;
+
+    x = (t_cd4001 *)pd_new(cd4001_class);
+    if (x == NULL) return (x);
+    x->x_out = outlet_new((t_object *)x, &s_float);
+    x->x_inlet2 = inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("inlet2"));
+    return (x);
+}
+
+void cd4001_setup(void)
+{
+    cd4001_class = class_new(gensym("cd4001"),
+                    (t_newmethod)cd4001_new,
+                    (t_method)cd4001_free,
+                    sizeof(t_cd4001), 0, 0); /* no arguments */
+    class_addbang(cd4001_class, cd4001_bang);
+    class_addfloat(cd4001_class, cd4001_float);
+    class_addmethod(cd4001_class, (t_method)cd4001_inlet2, gensym("inlet2"), A_FLOAT, 0);
+}
+/* end cd4001.c */
+
-- 
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