| ??? 04/08/09 11:00 Read: times Msg Score: +1 +1 Informative |
#164490 - Found it! Responding to: ???'s previous message |
Andy Neil said:
Presumably, then, SFRX is a special SDCC extension - for an SFR mapped into Xdata space? Yes - found it: http://sdcc.svn.sourceforge.net/viewvc/sd...iew=markup For SDCC, compiler.h said:
# define SFRX(name, addr) __xdata volatile unsigned char __at(addr) name For Keil C51, compiler.h said:
# define SFRX(name, addr) volatile unsigned char xdata name _at_ addr etc... So not actually specific to SDCC - but a "portable" macro provided by compiler.h Neat. |
| Topic | Author | Date |
| How to access memory mapped 8255 with SDCC? | 01/01/70 00:00 | |
| also asked here: | 01/01/70 00:00 | |
| 8255 with SDCC | 01/01/70 00:00 | |
| Wrong question? | 01/01/70 00:00 | |
| It's C | 01/01/70 00:00 | |
| not on the 8051 | 01/01/70 00:00 | |
| Oh yes it is! | 01/01/70 00:00 | |
| Use XBYTE macro | 01/01/70 00:00 | |
| Isn't there a problem with that? | 01/01/70 00:00 | |
| Oops. I used a wrong example | 01/01/70 00:00 | |
| Portability | 01/01/70 00:00 | |
| like this... | 01/01/70 00:00 | |
| How about a macro in ASM, callable from 'C'? | 01/01/70 00:00 | |
| This is HOW I will Prefer | 01/01/70 00:00 | |
| LST output of my previously posted code | 01/01/70 00:00 | |
| Try the comparison | 01/01/70 00:00 | |
| Unnecessarily complicated! | 01/01/70 00:00 | |
| NOT UNNECESSARILY | 01/01/70 00:00 | |
| You are mistaken | 01/01/70 00:00 | |
| Array or pointer similar | 01/01/70 00:00 | |
| That should not be necessary | 01/01/70 00:00 | |
| SFRX(...,. ..) worked | 01/01/70 00:00 | |
| SFRX - presumably, that's an SDCC extension? | 01/01/70 00:00 | |
| Found it! | 01/01/70 00:00 | |
RE: Found it! | 01/01/70 00:00 |