updown.cpp revision 12855:588919e0e4aa 
1#include "systemc.h"
2#include "specialized_signals/scx_signal_int.h"
3#include "specialized_signals/scx_signal_signed.h"
4#include "specialized_signals/scx_signal_uint.h"
5#include "specialized_signals/scx_signal_unsigned.h"
6
7SC_MODULE(up_down)
8{
9    sc_in_clk             clk;
10    sc_in<sc_uint<1> >    up;
11    sc_in<sc_uint<1> >    down;
12    sc_in<sc_uint<9> >    data_in;
13    sc_inout<sc_uint<1> > parity_out;
14    sc_inout<sc_uint<1> > carry_out;
15    sc_inout<sc_uint<1> > borrow_out;
16    sc_inout<sc_uint<9> > count_out;
17
18    sc_uint<10>           cnt_dn;
19    sc_uint<10>           cnt_up;
20    sc_uint<9>            count_nxt;
21    sc_uint<1>            load;
22
23	SC_CTOR(up_down)
24	{
25		SC_METHOD(run);
26		sensitive << clk.pos();
27	}
28
29     void run()
30	 {
31        cnt_dn = count_out - 5;
32        cnt_up = count_out + 3;
33
34        load = 1;
35        switch( (unsigned int )(up,down) ) {
36          case(0):
37		    count_nxt = data_in;
38            break;
39          case(1):
40            count_nxt = cnt_dn;
41            break;
42          case(2):
43            count_nxt = cnt_up;
44            break;
45          case(3):
46            load = 0;
47            break;
48        }
49
50        if( load)  {
51                parity_out = count_nxt.xor_reduce();
52                carry_out = up&cnt_up[9];
53                borrow_out = down&cnt_dn[9];
54                count_out = count_nxt;
55       }
56    }
57};
58
59
60#define UP_DOWN(up, down) up, down
61
62struct stimulus {
63   int up;
64   int down;
65   int data_in;
66} s[] = {
67	{ UP_DOWN(0, 0), 200 }, /* load 200 */
68        { UP_DOWN(1, 0), 0 },   /* inc */
69        { UP_DOWN(1, 0), 0 },   /* inc */
70        { UP_DOWN(0, 1), 0 },   /* dec */
71        { UP_DOWN(0, 1), 0 },   /* dec */
72        { UP_DOWN(0, 1), 0 },   /* dec */
73	{ UP_DOWN(1, 1), 0 },   /* hold */
74	{ UP_DOWN(1, 1), 0 },   /* hold */
75	{ UP_DOWN(1, 1), 0 },   /* hold */
76	{ UP_DOWN(0, 0), 200 }, /* load 200 */
77	{ UP_DOWN(1, 1), 0 },   /* hold */
78	{ UP_DOWN(1, 1), 0 },   /* hold */
79        { UP_DOWN(0, 1), 0 },   /* dec */
80	{ UP_DOWN(0, 0), 2 },   /* load 2 */
81        { UP_DOWN(0, 1), 0 },   /* dec */
82	{ UP_DOWN(0, 0), 0x1ff},/* load 0x1ff */
83        { UP_DOWN(1, 0), 0 },   /* inc */
84};
85
86
87int sc_main(int argc, char* argv[])
88{
89    sc_signal<sc_uint<1> > borrow_out;
90    sc_signal<sc_uint<1> > carry_out;
91	sc_clock			   clock;
92    sc_signal<sc_uint<9> > count_out;
93    sc_signal<sc_uint<9> > data_in;
94    sc_signal<sc_uint<1> > down;
95    unsigned int           i;
96    sc_signal<sc_uint<1> > parity_out;
97    sc_signal<sc_uint<1> > up;
98
99    up_down up_down_0("up_down_0");
100		up_down_0.borrow_out(borrow_out);
101		up_down_0.carry_out(carry_out);
102		up_down_0.data_in(data_in);
103		up_down_0.clk(clock);
104		up_down_0.count_out(count_out);
105		up_down_0.down(down);
106		up_down_0.parity_out(parity_out);
107		up_down_0.up(up);
108
109    printf("%5s %2s %4s %7s %10s %8s %10s %9s\n",
110    	   "clock", "up", "down", "data_in", "parity_out",
111	   "carry_out", "borrow_out", "count_out");
112
113    for( i = 0; i < sizeof s/sizeof(struct stimulus); i++) {
114        up = s[i].up;
115        down = s[i].down;
116        data_in = s[i].data_in;
117
118		sc_start(1, SC_NS);
119
120        printf("%5d %2d %4d %7d %10d %8d %10d %9d\n",
121			(int)sc_time_stamp().to_double()/1000, (int)up, (int)down,
122			(int)data_in, (int)parity_out, (int)carry_out, (int)borrow_out,
123			(int)count_out);
124    }
125
126    /* get last register values */
127    printf("%5d %2d %4d %7d %10d %8d %10d %9d\n",
128		(int)sc_time_stamp().to_double()/1000, (int)up, (int)down,
129		(int)data_in, (int)parity_out, (int)carry_out, (int)borrow_out,
130		(int)count_out);
131
132	return 0;
133}
134
135