AAEON TKS-G21-CV05 - Manual (Page 64)

E m b e d d e d B o x T K S - G 2 1 - C V 0 5
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