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PCM-9562 User Manual
Appendix C
P
rog. GPIO
&
W
atchdog
T
imer
ret
Ct_I
2
CWriteByteEndp
CT_Chk_SMBus_ReadyProcNear
mov dx,SMBu 0;status port
clc
mov cx,0800h
Chk_I
2
C_OK:
in
al,dx
;get status
NEWIODELAY
out dx,al
;clear
status
NEWIODELAY
test
al, 02H
;termination of command ?
jnz
short Clear_final
and al, NOT 40H;mask INUSE bit
or
al,al
;status OK ?
jz
short Clear_final
test
al,04h
;device error
jnz
short SMBus_Err
loop short Chk_I
2
C_OK
;SMbus error due to timeout
SMBus_Err:
stc
ret
Clear_final:
clc
ret
CT_Chk_SMBus_ReadyEndp
;;===============================================================
===
Delay5msprocnear
push cx
mov cx, 1000
@@:
NEWIODELAY
loop short @B
pop cx
ret
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