Aaeon PCM-QM77 Instrukcja Użytkownika Pobierz pdf (Strona 172)

Compact Board PCM-QM77

Appendix E Digital I/O F-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

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