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/cd4017.c | 152 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 152 insertions(+) create mode 100755 cmos/cd4017.c (limited to 'cmos/cd4017.c') 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 */ + -- cgit v1.2.1