IBASE Technology ET977, Руководство пользователя

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Appendix
ET977 Series
User’s Manual
53
* F81804 DIO Main Function Example *
INTN
EFIAPI
ShellAppMain (
IN UINTN Argc,
IN CHAR16 **Argv
)
{
UINT8 DIO;
F8104EnterConfig();
if(!F81804Init()){ //Check if this SIO is F81804
return 0;
}
F81804DioInit(); //Init F81804 DIO
F81804SetOutput(0x00); //Set out0-3 to Low
DIO = F81804GetInput();
if(DIO != 0x00){
return 0;
}
F81804SetOutput(0x1E); //Set out0-3 to High
DIO = F81804GetInput();
if(DIO != 0x0F){
return 0;
}