Lpc2000

Thanks guys,

I checked the BX-call several times and debugged even in the the 
THUMB-part. I overlooked however the result comes in Params[1].

Small step voor de ARM, large step for me...

Conrado


--- In lpc2000@yahoogroups.com, Tom Walsh <tom@o...> wrote:
>
> Robert Adsett wrote:
> 
> >At 11:36 PM 1/22/06 -0500, Tom Walsh wrote:
> >  
> >
> >>I dunno, mine works and I didn't bother with ASM:
> >>
> >>======== begin C call to ID ============
> >>
> >>#define  IAP_LOCATION            0x7ffffff1
> >>
> >>typedef void (*IAP)(unsigned int [],unsigned int[]);
> >>unsigned int command_iap[5], result_iap[3];
> >>IAP   iap_entry;
> >>
> >>
> >>static int iapCommand (iap_calls_t command, int parm1, int 
parm2, int parm3)
> >>{ // execute ISP similar command via IAP calls.
> >>   iap_entry = (IAP) IAP_LOCATION;
> >>   switch (command) {
> >>....
> >>....
> >>      case IAP_READ_PART_ID:
> >>         command_iap [0] = 54;
> >>         disableIRQ(); iap_entry(command_iap,result_iap); 
enableIRQ();
> >>    
> >>
> >
> >That only works if the compiler uses a bx to call iap_entry.  Not 
all do 
> >and there is AFAIK nothing that would require a compiler to 
(keep) doing so.
> >
> >  
> >
> Yes, and having a JTAG unit is a good thing!  :-)
> 
> TomW
> 
> -- 
> Tom Walsh - WN3L - Embedded Systems Consultant
> http://openhardware.net, http://cyberiansoftware.com
> "Windows? No thanks, I have work to do..."
> ----------------------------------------------------
>