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authorMartin Peach <mrpeach@users.sourceforge.net>2007-03-20 16:06:17 +0000
committerMartin Peach <mrpeach@users.sourceforge.net>2007-03-20 16:06:17 +0000
commit8a36990c0305ea2effba5e869351b902ecb429b0 (patch)
tree01aa72be2cddadbe1f26db56ce17c84f3bf99127 /cmos/cd4017.c
parentaf3619555f5c60450da97c74ec3c1f9c14f3133d (diff)
CMOS digital logic emulation objects
svn path=/trunk/externals/mrpeach/; revision=7509
Diffstat (limited to 'cmos/cd4017.c')
-rwxr-xr-xcmos/cd4017.c152
1 files changed, 152 insertions, 0 deletions
diff --git a/cmos/cd4017.c b/cmos/cd4017.c
new file mode 100755
index 0000000..d5bcc97
--- /dev/null
+++ b/cmos/cd4017.c
@@ -0,0 +1,152 @@
+/* cd4017.c MP 20070305 */
+/* Emulate a cd4017b */
+#include "m_pd.h"
+
+typedef struct _cd4017
+{
+ t_object x_obj;
+ t_int x_state;/* clock_inhibit value in bit 0, clock level in bit 1, reset level in bit 2 */
+ t_int x_count;
+ t_outlet *x_0;
+ t_outlet *x_1;
+ t_outlet *x_2;
+ t_outlet *x_3;
+ t_outlet *x_4;
+ t_outlet *x_5;
+ t_outlet *x_6;
+ t_outlet *x_7;
+ t_outlet *x_8;
+ t_outlet *x_9;
+ t_outlet *x_carry_out;/* Outputs 1 when any of outlets 0-3 is one */
+ t_inlet *x_clock_inhibit;/* clock_inhibit takes one or zero as acceptable inputs. 1 inhibits the clock. */
+ t_inlet *x_reset;/* reset */
+ /* The main inlet (clcok) should accept a bang or a one as valid clocks. */
+ /* If a one is received, it must be followed by a zero before the clock will work again. */
+} t_cd4017;
+
+static t_class *cd4017_class;
+
+void cd4017_setup(void);
+static void *cd4017_new(t_symbol *s, int argc, t_atom *argv);
+static void cd4017_free(t_cd4017 *x);
+static void cd4017_bang(t_cd4017 *x);
+static void cd4017_float(t_cd4017 *x, t_float f);
+static void cd4017_clock_inhibit(t_cd4017 *x, t_float f);
+static void cd4017_reset(t_cd4017 *x, t_float f);
+static void cd4017_update_outlets(t_cd4017 *x);
+
+static void cd4017_float(t_cd4017 *x, t_float f)
+{
+ if (f == 1)
+ { /* if clock is high and was low, clock it. */
+ if ((x->x_state & 2) == 0) cd4017_bang(x);
+ x->x_state |= 2;
+ }
+ else if (f == 0) x->x_state &= ~2;
+ else post("cd4017 accepts bang, 1 or 0.");
+}
+
+static void cd4017_bang(t_cd4017 *x)
+{
+ if ((x->x_state & 5) == 0)
+ { /* if clock inhibit is low and reset is low, clock forward */
+ x->x_count = ((x->x_count + 1)%10);
+ cd4017_update_outlets(x);
+ }
+}
+
+static void cd4017_clock_inhibit(t_cd4017 *x, t_float f)
+{
+ if (f == 1) x->x_state |= 1; /* clock inhibited */
+ else if (f == 0) x->x_state &= ~1; /* clock uninhibited */
+ else post("cd4017 clock inhibit takes 1 or 0 only.");
+ return;
+}
+
+static void cd4017_reset(t_cd4017 *x, t_float f)
+{
+ if (f == 1)
+ {
+ x->x_count = 0;
+ x->x_state |= 4; /* reset */
+ if ((x->x_state & 8) == 0) /* don't reenter any update_oulets in progress */
+ {
+ cd4017_update_outlets(x);
+ }
+ else x->x_state |= 16; /* reset during outlet_update */
+ }
+ else if (f == 0) x->x_state &= ~4; /* no reset */
+}
+
+static void cd4017_update_outlets(t_cd4017 *x)
+{
+ x->x_state |= 8;/* updating outlets */
+reset:
+ x->x_state &= ~16; /* clear reset during outlet_update */
+ outlet_float(x->x_0, (x->x_count == 0)?1:0);
+/* we might get reset as a result of feedback from one of these outlets. */
+ if ((x->x_state & 16) != 0) goto reset;
+ outlet_float(x->x_1, (x->x_count == 1)?1:0);
+ if ((x->x_state & 16) != 0) goto reset;
+ outlet_float(x->x_2, (x->x_count == 2)?1:0);
+ if ((x->x_state & 16) != 0) goto reset;
+ outlet_float(x->x_3, (x->x_count == 3)?1:0);
+ if ((x->x_state & 16) != 0) goto reset;
+ outlet_float(x->x_4, (x->x_count == 4)?1:0);
+ if ((x->x_state & 16) != 0) goto reset;
+ outlet_float(x->x_5, (x->x_count == 5)?1:0);
+ if ((x->x_state & 16) != 0) goto reset;
+ outlet_float(x->x_6, (x->x_count == 6)?1:0);
+ if ((x->x_state & 16) != 0) goto reset;
+ outlet_float(x->x_7, (x->x_count == 7)?1:0);
+ if ((x->x_state & 16) != 0) goto reset;
+ outlet_float(x->x_8, (x->x_count == 8)?1:0);
+ if ((x->x_state & 16) != 0) goto reset;
+ outlet_float(x->x_9, (x->x_count == 9)?1:0);
+ if ((x->x_state & 16) != 0) goto reset;
+ outlet_float(x->x_carry_out, (x->x_count < 5)?1:0);
+ if ((x->x_state & 16) != 0) goto reset;
+ x->x_state &= ~8;/* finished updating outlets */
+}
+
+static void cd4017_free(t_cd4017 *x)
+{
+ return;
+}
+
+static void *cd4017_new(t_symbol *s, int argc, t_atom *argv)
+{
+ t_cd4017 *x;
+
+ x = (t_cd4017 *)pd_new(cd4017_class);
+ if (x == NULL) return (x);
+ x->x_0 = outlet_new((t_object *)x, &s_float);
+ x->x_1 = outlet_new((t_object *)x, &s_float);
+ x->x_2 = outlet_new((t_object *)x, &s_float);
+ x->x_3 = outlet_new((t_object *)x, &s_float);
+ x->x_4 = outlet_new((t_object *)x, &s_float);
+ x->x_5 = outlet_new((t_object *)x, &s_float);
+ x->x_6 = outlet_new((t_object *)x, &s_float);
+ x->x_7 = outlet_new((t_object *)x, &s_float);
+ x->x_8 = outlet_new((t_object *)x, &s_float);
+ x->x_9 = outlet_new((t_object *)x, &s_float);
+ x->x_carry_out = outlet_new((t_object *)x, &s_float);
+ x->x_clock_inhibit = inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("clock_inhibit"));
+ x->x_reset = inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("reset"));
+
+ return (x);
+}
+
+void cd4017_setup(void)
+{
+ cd4017_class = class_new(gensym("cd4017"),
+ (t_newmethod)cd4017_new,
+ (t_method)cd4017_free,
+ sizeof(t_cd4017), 0, 0); /* no arguments */
+ class_addbang(cd4017_class, cd4017_bang);
+ class_addfloat(cd4017_class, cd4017_float);
+ class_addmethod(cd4017_class, (t_method)cd4017_reset, gensym("reset"), A_FLOAT, 0);
+ class_addmethod(cd4017_class, (t_method)cd4017_clock_inhibit, gensym("clock_inhibit"), A_FLOAT, 0);
+}
+/* end cd4017.c */
+