Aaeon PCM-QM77 Bedienungsanleitung PDF herunterladen (Seite 168)

Compact Board PCM-QM77

Appendix E Digital I/O F-5

begin:

mov cl,01h

mov al,80h

call CT_I2CWriteByte

call Delay5ms

mov al,00h

mov cl,20h

call CT_I2CWriteByte

mov cl,22h

call CT_I2CReadByte

;Input : CL - register index

; CH - device ID

;Output : AL - Value read

Ct_I2CReadByte Proc Near

mov ch,06eh

mov dx, 0f040h + 00h ; Host Control Register

mov al, 0ffh ; Clear previous

commands

out dx, al

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