| ??? 04/08/09 06:47 Read: times |
#164473 - LST output of my previously posted code Responding to: ???'s previous message |
Dear Gopal,
The previously posted 'c' code is compiled using SDCC ver 2.4.0 here is how .LST file is generated
291 ;--------------------------------------------------------
292 .area CSEG (CODE)
293 ;------------------------------------------------------------
294 ;Allocation info for local variables in function 'init_8255'
295 ;------------------------------------------------------------
296 ;control_word Allocated to registers r2
297 ;------------------------------------------------------------
298 ;mem.c:9: void init_8255(unsigned char control_word)
299 ; -----------------------------------------
300 ; function init_8255
301 ; -----------------------------------------
0000 302 _init_8255:
0002 303 ar2 = 0x02
0003 304 ar3 = 0x03
0004 305 ar4 = 0x04
0005 306 ar5 = 0x05
0006 307 ar6 = 0x06
0007 308 ar7 = 0x07
0000 309 ar0 = 0x00
0001 310 ar1 = 0x01
0000 C0*00 311 push _bp
0002 85 81*00 312 mov _bp,sp
313 ; genReceive
0005 AA 82 314 mov r2,dpl
315 ;mem.c:11: ptr_8255 = MY_8255_BASE;
316 ; genAssign
0007 90s00r00 317 mov dptr,#_ptr_8255
000A 74 00 318 mov a,#_MY_8255_BASE
000C F0 319 movx @dptr,a
000D A3 320 inc dptr
000E 74 40 321 mov a,#(_MY_8255_BASE >> 8)
0010 F0 322 movx @dptr,a
0011 A3 323 inc dptr
0012 74 01 324 mov a,#0x01
0014 F0 325 movx @dptr,a
326 ;mem.c:12: *(ptr_8255 + 3) = control_word;
327 ; genPointerSet
328 ; genGenPointerSet
0015 90 40 03 329 mov dptr,#(_MY_8255_BASE + 0x0003)
0018 75 F0 01 330 mov b,#0x01
001B EA 331 mov a,r2
001C 12s00r00 332 lcall __gptrput
001F 333 00101$:
001F 85*00 81 334 mov sp,_bp
0022 D0*00 335 pop _bp
0024 22 336 ret
337 .area CSEG (CODE)
338 .area XINIT (CODE)
Regards, Mahesh |
| 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 |