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/*
* sim.cc -- do the simulation
*/
#include "picsim.hh"
static SimAR sim_nil( SimFunc func, SimAR arg );
/*
* Load the specified PicTools file & set the part info
*/
void
sim_init( const char *fname )
{
int i, j;
SimAR a;
char buf[64];
Pic.isize = 0;
Pic.nstack = 0;
Pic.reg_pages = 0;
Pic.neeprom = 0;
for (i = 0; i < 4; i++) {
for (j = 0; j < 128; j++) {
Pic.reg_file[i][j].redirect_page = i;
Pic.reg_file[i][j].redirect_reg = j;
Pic.reg_file[i][j].implemented = 0;
}
}
Pic.simulate = sim_nil;
Pic.wdt_min = Options.wdt_min;
Pic.wdt_nominal = Options.wdt_nom;
Pic.wdt_max = Options.wdt_max;
Pic.uinfo.clock = 1;
if (Pic.wdt_min > Pic.wdt_nominal || Pic.wdt_nominal > Pic.wdt_max) {
fputs( "Watchdog timeout values must follow this relation:\n"
"WDTmin <= WDTnominal <= WDTmax\n", stderr );
if (Pic.wdt_nominal < Pic.wdt_min)
Pic.wdt_nominal = Pic.wdt_min * 1.1;
if (Pic.wdt_max < Pic.wdt_nominal)
Pic.wdt_max = Pic.wdt_nominal * 1.1;
}
if (PU_Read( fname, &Pic.uinfo, &i ) != PU_OK) {
XtVaSetValues( W.title, XtNlabel, (XtPointer)"Nit-PIC", NULL );
return;
}
switch (Pic.uinfo.pictype) {
case 84:
Pic.simulate = pic16c84;
XtVaSetValues( W.title, XtNlabel, (XtPointer)"Nit-PIC 16C84", NULL );
break;
default:
sprintf( buf, "PIC type %d not supported\n", Pic.uinfo.pictype );
dialog( buf, 1, "OK" );
break;
}
Pic.simulate( Init, a );
redraw( );
}
/*
* Reset the simulator
*/
void
sim_reset( Widget w, XEvent *ev, String *prms, Cardinal *nprm )
{
SimAR a;
Pic.running = 0;
ipointer_erase( );
Pic.simulate( Reset, a );
ipointer_seek( w, ev, prms, nprm );
redraw( );
}
/*
* Step the simulator
*/
void
sim_step( Widget w, XEvent *ev, String *prms, Cardinal *nprm )
{
Boolean ip_was_visible;
SimAR a;
if (Pic.running)
ip_was_visible = False;
else
ip_was_visible = ipointer_erase( );
a = Pic.simulate( Step, a );
info_update( );
reg_update( );
if (ip_was_visible) {
Cardinal bogus_nprm = 0;
ipointer_seek( W.ipointer, ev, NULL, &bogus_nprm );
ipointer_refresh( W.itext, ev, prms, nprm );
}
}
static Boolean
sim_run_proc( XtPointer p )
{
if (Pic.running) {
SimAR a;
a = Pic.simulate( Step, a );
info_quick( );
return False;
} else {
ipointer_seek( W.ipointer, NULL, NULL, NULL );
ipointer_refresh( W.itext, NULL, NULL, NULL );
info_refresh( W.info, NULL, NULL, NULL );
reg_refresh( W.info, NULL, NULL, NULL );
return True;
}
}
/*
* Toggle Run mode on the simulator. If Run is on, start the
* repeating stepper.
*/
void
sim_toggle_run( Widget w, XEvent *ev, String *prms, Cardinal *nprm )
{
Pic.running = !Pic.running;
if (Pic.running) {
XtVaSetValues( W.run, XtNlabel, (XtPointer)"Pause", NULL );
ipointer_erase( );
reg_update( );
XtAppAddWorkProc( AppContext, sim_run_proc, NULL );
} else {
XtVaSetValues( W.run, XtNlabel, (XtPointer)"Run", NULL );
}
}
/*
* simulator stub routine
*/
static SimAR
sim_nil( SimFunc func, SimAR arg )
{
SimAR a;
static char buf[32];
switch (func) {
case Init:
return a;
case Reset:
return a;
case GetPage:
a.i = 0;
return a;
case GetInfo:
a.p = NULL;
return a;
case GetPins:
a.p = NULL;
return a;
case Disassemble:
sprintf( buf, "PICx%d unsupported", Pic.uinfo.pictype );
a.p = buf;
return a;
case Step:
return a;
default:
return a;
}
}
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