AAEON PCM-QM77 User Manual
Page 171
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C o m p a c t B o a r d
P C M - Q M 7 7
Appendix E Digital I/O F-8
out dx, al
mov dx, 0f040h + 05h
mov
al,
ah
out dx, al
mov dx, 0f040h + 00h ; Host Control Register
mov al, 48h
; Start a byte access
out dx, al
call
CT_Chk_SMBus_Ready
ret
Ct_I2CWriteByte Endp
; Wait until the busy bit clears, indicating that the SMBUS
; activity has concluded.
CT_Chk_SMBus_Ready Proc Near
mov dx,0f040h+ 0;status port
clc
mov
cx,0800h
Chk_I2c_OK:
in
al,dx
;get
status
call
Delay5ms
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