AAEON TKS-G21-CV05 - Manual (Page 60)

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-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, 0f000h + 00h ; Host Control Register
mov al, 0ffh ; Clear previous
commands
out dx, al