CMOS digital logic emulation objects

svn path=/trunk/externals/mrpeach/; revision=7509

1 files changed, 85 insertions, 0 deletions

diff --git a/cmos/cd4071.c b/cmos/cd4071.c
new file mode 100755
index 0000000..d6f49e7
--- /dev/null
+++ b/cmos/cd4071.c
@@ -0,0 +1,85 @@
+/* cd4071.c MP 20070308 */
+/* Emulate a cd4071b */
+#include "m_pd.h"
+
+typedef struct _cd4071
+{
+    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_cd4071;
+
+static t_class *cd4071_class;
+
+void cd4071_setup(void);
+static void *cd4071_new(t_symbol *s, int argc, t_atom *argv);
+static void cd4071_free(t_cd4071 *x);
+static void cd4071_bang(t_cd4071 *x);
+static void cd4071_float(t_cd4071 *x, t_float f);
+static void cd4071_inlet2(t_cd4071 *x, t_float f);
+static void cd4071_update_outlets(t_cd4071 *x);
+
+static void cd4071_float(t_cd4071 *x, t_float f)
+{
+    if (f == 1) x->x_in1 = 1;
+    else if (f == 0) x->x_in1 = 0;
+    else
+    {
+        post("cd4071 inlet 2 accepts 1 or 0.");
+        return;
+    }
+    cd4071_update_outlets(x);
+}
+
+static void cd4071_bang(t_cd4071 *x)
+{
+    cd4071_update_outlets(x);
+}
+
+static void cd4071_inlet2(t_cd4071 *x, t_float f)
+{
+    if (f == 1) x->x_in2 = 1;
+    else if (f == 0) x->x_in2 = 0;
+    else
+    {
+        post("cd4071 inlet 2 accepts 1 or 0.");
+        return;
+    }
+    cd4071_update_outlets(x);
+}
+
+static void cd4071_update_outlets(t_cd4071 *x)
+{ /* OR function */
+    outlet_float(x->x_out, ((x->x_in1 + x->x_in2) != 0)?1:0);
+}
+
+static void cd4071_free(t_cd4071 *x)
+{
+    return;
+}
+
+static void *cd4071_new(t_symbol *s, int argc, t_atom *argv)
+{
+    t_cd4071           *x;
+
+    x = (t_cd4071 *)pd_new(cd4071_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 cd4071_setup(void)
+{
+    cd4071_class = class_new(gensym("cd4071"),
+                    (t_newmethod)cd4071_new,
+                    (t_method)cd4071_free,
+                    sizeof(t_cd4071), 0, 0); /* no arguments */
+    class_addbang(cd4071_class, cd4071_bang);
+    class_addfloat(cd4071_class, cd4071_float);
+    class_addmethod(cd4071_class, (t_method)cd4071_inlet2, gensym("inlet2"), A_FLOAT, 0);
+}
+/* end cd4071.c */
+