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#include <stdio.h>
#include <string.h>
#include <vpi_user.h>
struct net_descs
{
const char *name;
vpiHandle *handle;
};
static vpiHandle clk, arg_a, arg_b, res;
static int cnt;
static struct net_descs nets[] = {
{ "sliced_ex.clk", &clk},
{ "sliced_ex.arg_a", &arg_a},
{ "sliced_ex.arg_b", &arg_b},
{ "sliced_ex.sub_module.res", &res},
{ NULL, NULL}
};
static PLI_INT32
vpi_clk_proc(p_cb_data data)
{
s_vpi_value val;
val.format = vpiBinStrVal;
vpi_get_value (clk, &val);
/* Detect edge. */
if (strcmp (val.value.str, "1") != 0)
return 0;
val.format = vpiBinStrVal;
vpi_get_value (res, &val);
printf ("cycle %d: res = %s\n", cnt, val.value.str);
switch (cnt)
{
case 0:
val.format = vpiBinStrVal;
val.value.str = "0001";
vpi_put_value (arg_a, &val, NULL, vpiNoDelay);
val.format = vpiBinStrVal;
val.value.str = "0010";
vpi_put_value (arg_b, &val, NULL, vpiNoDelay);
break;
case 2:
val.format = vpiBinStrVal;
val.value.str = "0010";
vpi_put_value (arg_a, &val, NULL, vpiNoDelay);
val.format = vpiBinStrVal;
val.value.str = "0011";
vpi_put_value (arg_b, &val, NULL, vpiNoDelay);
break;
case 3:
if (strcmp(val.value.str, "00000000") != 0)
printf ("Error!\n");
break;
case 4:
if (strcmp(val.value.str, "00010011") != 0)
printf ("Error!\n");
break;
default:
break;
}
cnt++;
return 0;
}
static PLI_INT32
vpi_start_proc(p_cb_data data)
{
s_vpi_value val;
s_cb_data cb;
int i;
for (i = 0; nets[i].name; i++)
{
*nets[i].handle = vpi_handle_by_name ((char *)nets[i].name, NULL);
if (*nets[i].handle == NULL)
{
printf ("cannot get net %s\n", nets[i].name);
return 0;
}
}
cb.reason = cbValueChange;
cb.cb_rtn = &vpi_clk_proc;
cb.user_data = NULL;
cb.obj = clk;
if (vpi_register_cb (&cb) == NULL)
vpi_printf ("cannot register ValueChange call back\n");
return 0;
}
static void
my_handle_register(void)
{
s_cb_data cb;
cb.reason = cbStartOfSimulation;
cb.cb_rtn = &vpi_start_proc;
cb.user_data = NULL;
if (vpi_register_cb (&cb) == NULL)
vpi_printf ("cannot register EndStartOfSimulation call back\n");
}
void (*vlog_startup_routines[]) () =
{
my_handle_register,
0
};
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