Aaeon PCM-QM77 Bedienungsanleitung PDF herunterladen (Seite 169)

Compact Board PCM-QM77

Appendix E Digital I/O F-6

call Delay5ms

mov dx, 0f040h + 04h ; Transmit Slave Address

Register

inc ch ; Set the slave address and

mov al, ch ; prepare for a READ command

out dx, al

mov dx, 0f040h + 03h ; Host Command Register

mov al, cl ; offset to read

out dx, al

mov dx, 0f040h + 05h

xor al, al ; Clear old data

out dx, al

mov dx, 0f040h + 02h ; Host Control Reegister

mov al, 48h ; Start a byte access

out dx, al

call CT_Chk_SMBus_Ready

mov dx, 0f040h + 05h

in al, dx

ret

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