AAEON AEC-VS01 - Manual (Page 94)

E m b e d d e d C o n t r o l l e r A E C - V S 0 1
Appendix C Digital I/O C-9
out dx,al ;clear status
call Delay5ms
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_I2c_OK
;SMbus error due to timeout
SMBus_Err:
stc
ret
Clear_final:
clc
ret
CT_Chk_SMBus_Ready Endp
END begin