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/cd4027.c | 210 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 210 insertions(+) create mode 100755 cmos/cd4027.c (limited to 'cmos/cd4027.c') diff --git a/cmos/cd4027.c b/cmos/cd4027.c new file mode 100755 index 0000000..69aaf48 --- /dev/null +++ b/cmos/cd4027.c @@ -0,0 +1,210 @@ +/* cd4027.c MP 20070306 */ +/* Emulate a cd4027b */ +#include "m_pd.h" + +typedef struct _cd4027 +{ + t_object x_obj; + t_int x_state;/* set = bit0, clock = bit1, reset = bit2 j = bit3 k = bit4 q = bit 5 */ + t_outlet *x_Q; + t_outlet *x_notQ; + t_inlet *x_set;/* set takes one or zero as acceptable inputs. */ + t_inlet *x_reset;/* reset takes one or zero as acceptable inputs. */ + t_inlet *x_j;/* j takes one or zero as acceptable inputs. */ + t_inlet *x_k;/* k takes one or zero as acceptable inputs. */ + /* The main inlet (clock) 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_cd4027; +#define SET_4027 1 +#define CLOCK_4027 2 +#define RESET_4027 4 +#define J_4027 8 +#define K_4027 16 +#define Q_4027 32 +#define UPDATING_4027 64 +#define CHANGED_4027 128 + +static t_class *cd4027_class; + +void cd4027_setup(void); +static void *cd4027_new(t_symbol *s, int argc, t_atom *argv); +static void cd4027_free(t_cd4027 *x); +static void cd4027_bang(t_cd4027 *x); +static void cd4027_float(t_cd4027 *x, t_float f); +static void cd4027_set(t_cd4027 *x, t_float f); +static void cd4027_reset(t_cd4027 *x, t_float f); +static void cd4027_j(t_cd4027 *x, t_float f); +static void cd4027_k(t_cd4027 *x, t_float f); +static void cd4027_update_outlets(t_cd4027 *x); +static void cd4027_printstate (t_cd4027 *x); + +static void cd4027_float(t_cd4027 *x, t_float f) +{ + if (f == 1) + { /* if clock is high and was low, clock it. */ + if ((x->x_state & CLOCK_4027) == 0) cd4027_bang(x); + x->x_state |= CLOCK_4027; + } + else if (f == 0) x->x_state &= ~CLOCK_4027; + else post("cd4027 accepts bang, 1 or 0."); +} + +static void cd4027_printstate (t_cd4027 *x) +{ + post ("SET %d RESET %d J %d K %d Q %d", ((x->x_state & SET_4027) != 0)?1:0 + , ((x->x_state & RESET_4027) != 0)?1:0 + , ((x->x_state & J_4027) != 0)?1:0 + , ((x->x_state & K_4027) != 0)?1:0 + , ((x->x_state & Q_4027) != 0)?1:0); +} + +static void cd4027_bang(t_cd4027 *x) +{ + if ((x->x_state & (SET_4027 | RESET_4027)) == 0) + { /* if set is low and reset is low, clock forward */ + if ((x->x_state & Q_4027) != 0) + { /* Q is high */ + if ((x->x_state & K_4027)== 0) x->x_state |= Q_4027; + else x->x_state &= ~Q_4027; + } + else + { /* Q is low */ + if ((x->x_state & J_4027) != 0) x->x_state |= Q_4027; + else x->x_state &= ~Q_4027; + } + cd4027_update_outlets(x); + } +} + +static void cd4027_set(t_cd4027 *x, t_float f) +{ + if (f == 1) + { + x->x_state |= SET_4027; /* set = 1 */ + } + else if (f == 0) + { + x->x_state &= ~SET_4027; /* set = 0 */ + } + else + { + post("cd4027 set takes 1 or 0 only."); + return; + } + /* update outlets if not already doing that */ + if ((x->x_state & UPDATING_4027) == 0) + { + cd4027_update_outlets(x); + } + else + { + x->x_state |= CHANGED_4027; + } + return; +} + +static void cd4027_reset(t_cd4027 *x, t_float f) +{ + if (f == 1) + { + x->x_state |= RESET_4027; /* reset = 1 */ + } + else if (f == 0) + { + x->x_state &= ~RESET_4027; /* reset = 0 */ + } + else + { + return; + } + /* update outlets if not already doing that */ + if ((x->x_state & UPDATING_4027) == 0) + { + cd4027_update_outlets(x); + } + else + { + x->x_state |= CHANGED_4027; + } + return; +} + +static void cd4027_j(t_cd4027 *x, t_float f) +{ + if (f == 1) + { + x->x_state |= J_4027; /* j = 1 */ + } + else if (f == 0) + { + x->x_state &= ~J_4027; /* j = 0 */ + } + else post("cd4027 j takes 1 or 0 only."); + return; +} + +static void cd4027_k(t_cd4027 *x, t_float f) +{ + if (f == 1) + { + x->x_state |= K_4027; /* k = 1 */ + } + else if (f == 0) + { + x->x_state &= ~K_4027; /* k = 0 */ + } + else post("cd4027 k takes 1 or 0 only."); + return; +} + +static void cd4027_update_outlets(t_cd4027 *x) +{ + /* cd4027_printstate (x); */ + x->x_state |= UPDATING_4027;/* updating outlets */ +reset: + if ((x->x_state & SET_4027) != 0) x->x_state |= Q_4027; + else if ((x->x_state & RESET_4027) != 0) x->x_state &= ~Q_4027; + x->x_state &= ~CHANGED_4027; /* prepare to flag any changes that occur during outlet_update */ + outlet_float(x->x_notQ, ((x->x_state & Q_4027) == 0)?1:0); +/* we might get set or reset as a result of feedback from one of these outlets. */ + if ((x->x_state & CHANGED_4027) != 0) goto reset; + outlet_float(x->x_Q, ((x->x_state & Q_4027) != 0)?1:0); + if ((x->x_state & CHANGED_4027) != 0) goto reset; + x->x_state &= ~UPDATING_4027;/* finished updating outlets */ +} + +static void cd4027_free(t_cd4027 *x) +{ + return; +} + +static void *cd4027_new(t_symbol *s, int argc, t_atom *argv) +{ + t_cd4027 *x; + + x = (t_cd4027 *)pd_new(cd4027_class); + if (x == NULL) return (x); + x->x_Q = outlet_new((t_object *)x, &s_float); + x->x_notQ = outlet_new((t_object *)x, &s_float); + x->x_set = inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("set")); + x->x_reset = inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("reset")); + x->x_j = inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("j")); + x->x_k = inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("k")); + return (x); +} + +void cd4027_setup(void) +{ + cd4027_class = class_new(gensym("cd4027"), + (t_newmethod)cd4027_new, + (t_method)cd4027_free, + sizeof(t_cd4027), 0, 0); /* no arguments */ + class_addbang(cd4027_class, cd4027_bang); + class_addfloat(cd4027_class, cd4027_float); + class_addmethod(cd4027_class, (t_method)cd4027_reset, gensym("reset"), A_FLOAT, 0); + class_addmethod(cd4027_class, (t_method)cd4027_set, gensym("set"), A_FLOAT, 0); + class_addmethod(cd4027_class, (t_method)cd4027_j, gensym("j"), A_FLOAT, 0); + class_addmethod(cd4027_class, (t_method)cd4027_k, gensym("k"), A_FLOAT, 0); +} +/* end cd4027.c */ + -- cgit v1.2.1