From 8a36990c0305ea2effba5e869351b902ecb429b0 Mon Sep 17 00:00:00 2001 From: Martin Peach Date: Tue, 20 Mar 2007 16:06:17 +0000 Subject: CMOS digital logic emulation objects svn path=/trunk/externals/mrpeach/; revision=7509 --- cmos/cd4024.c | 125 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 125 insertions(+) create mode 100755 cmos/cd4024.c (limited to 'cmos/cd4024.c') diff --git a/cmos/cd4024.c b/cmos/cd4024.c new file mode 100755 index 0000000..93c3bf4 --- /dev/null +++ b/cmos/cd4024.c @@ -0,0 +1,125 @@ +/* cd4024.c MP 20070319 */ +/* Emulate a cd4024b */ +#include "m_pd.h" + +typedef struct _cd4024 +{ + t_object x_obj; + t_int x_reset; + t_int x_clock; + t_int x_count; + t_int x_updating; + t_outlet *x_Q1; + t_outlet *x_Q2; + t_outlet *x_Q3; + t_outlet *x_Q4; + t_outlet *x_Q5; + t_outlet *x_Q6; + t_outlet *x_Q7; + t_inlet *x_resetIn;/* 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_cd4024; + +static t_class *cd4024_class; + +void cd4024_setup(void); +static void *cd4024_new(t_symbol *s, int argc, t_atom *argv); +static void cd4024_free(t_cd4024 *x); +static void cd4024_bang(t_cd4024 *x); +static void cd4024_float(t_cd4024 *x, t_float f); +static void cd4024_reset(t_cd4024 *x, t_float f); +static void cd4024_update_outlets(t_cd4024 *x); + +static void cd4024_float(t_cd4024 *x, t_float f) +{ + if (f == 0) + { /* if clock is low and was high, clock it. */ + if (x->x_clock == 1) + { + x->x_clock = 0; + cd4024_bang(x); + } + } + else if (f == 1) x->x_clock = 1; + else post("cd4024 clock accepts bang, 1 or 0."); +} + +static void cd4024_bang(t_cd4024 *x) +{ + if (x->x_reset == 0) + { /* if reset is low, clock forward */ + x->x_count = (x->x_count + 1)%128; + cd4024_update_outlets(x); + } +} + +static void cd4024_reset(t_cd4024 *x, t_float f) +{ + if (f == 1) + { + x->x_count = 0; + x->x_reset = 1; + if (x->x_updating != 0) x->x_updating |= 2; + else cd4024_update_outlets(x); + } + else if (f == 0) x->x_reset = 0; +} + +static void cd4024_update_outlets(t_cd4024 *x) +{ +reset: + x->x_updating = 1;/* updating outlets */ + outlet_float(x->x_Q7, ((x->x_count & 64) != 0)?1:0); +/* we might get reset as a result of feedback from one of these outlets. */ + if ((x->x_updating & 2) != 0) goto reset; + outlet_float(x->x_Q6, ((x->x_count & 32) != 0)?1:0); + if ((x->x_updating & 2) != 0) goto reset; + outlet_float(x->x_Q5, ((x->x_count & 16) != 0)?1:0); + if ((x->x_updating & 2) != 0) goto reset; + outlet_float(x->x_Q4, ((x->x_count & 8) != 0)?1:0); + if ((x->x_updating & 2) != 0) goto reset; + outlet_float(x->x_Q3, ((x->x_count & 4) != 0)?1:0); + if ((x->x_updating & 2) != 0) goto reset; + outlet_float(x->x_Q2, ((x->x_count & 2) != 0)?1:0); + if ((x->x_updating & 2) != 0) goto reset; + outlet_float(x->x_Q1, ((x->x_count & 1) != 0)?1:0); + if ((x->x_updating & 2) != 0) goto reset; + x->x_updating = 0; /* finished updating outlets */ +} + +static void cd4024_free(t_cd4024 *x) +{ + return; +} + +static void *cd4024_new(t_symbol *s, int argc, t_atom *argv) +{ + t_cd4024 *x; + + x = (t_cd4024 *)pd_new(cd4024_class); + if (x == NULL) return (x); + x->x_Q1 = outlet_new((t_object *)x, &s_float); + x->x_Q2 = outlet_new((t_object *)x, &s_float); + x->x_Q3 = outlet_new((t_object *)x, &s_float); + x->x_Q4 = outlet_new((t_object *)x, &s_float); + x->x_Q5 = outlet_new((t_object *)x, &s_float); + x->x_Q6 = outlet_new((t_object *)x, &s_float); + x->x_Q7 = outlet_new((t_object *)x, &s_float); + x->x_resetIn = inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("reset")); + + return (x); +} + +void cd4024_setup(void) +{ + cd4024_class = class_new(gensym("cd4024"), + (t_newmethod)cd4024_new, + (t_method)cd4024_free, + sizeof(t_cd4024), 0, 0); /* no arguments */ + class_addbang(cd4024_class, cd4024_bang); + class_addfloat(cd4024_class, cd4024_float); + class_addmethod(cd4024_class, (t_method)cd4024_reset, gensym("reset"), A_FLOAT, 0); +} +/* end cd4024.c */ + -- cgit v1.2.1