Hi Prateek,
(like Maarten I cannot see anything wrong with
your code or the generated assembly,)
just a guess, could you try:
unsigned char serial_read(){
unsigned char c;
while(!RI);
c = SBUF;
RI = 0;
return c;
}
instead of:
unsigned char serial_read(){
while(!RI);
RI = 0;
return SBUF;
}
the proposed code avoids the jbc instruction and
reads SBUF before resetting the RI bit.
Should not matter but might be worth a try.
Results in:
_serial_read:
; test.c:34: while(!RI);
00101$:
jnb _RI,00101$
; test.c:35: c = SBUF;
mov dpl,_SBUF
; test.c:36: RI = 0;
clr _RI
; test.c:37: return c;
ret
instead of:
_serial_read:
; test.c:25: while(!RI);
00101$:
; test.c:26: RI = 0;
jbc _RI,00108$
sjmp 00101$
00108$:
; test.c:27: return SBUF;
mov dpl,_SBUF
ret
Greetings,
Frieder
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