Aaeon TKS-G21-CV05 Manuel d'utilisateur télécharger pdf (Page 63)

Embedded Box TKS-G21-CV05

Appendix C Digital I/O C-8

out dx, al

mov dx, 0f000h + 05h

mov al, ah

out dx, al

mov dx, 0f000h + 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,0f000h+ 0;status port

clc

mov cx,0800h

Chk_I2c_OK:

in al,dx ;get status

call Delay5ms

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Aaeon TKS-G21-CV05 Manuel d'utilisateur Page 63