American Megatrends MI802 User Manual page 58

APPENDIX
Dio3SetOutput(0x00);
DIO = Dio3GetInput() & 0x0F;
if (DIO != 0x0A)
{
printf("The Fintek 81866 digital IO abnormal, abort.\n");
return(1);
}//if (DIO != 0x0A)
Dio3SetOutput(0xA0);
Dio3SetOutput(0xF0);
Dio3SetOutput(0xA0);
DIO = Dio3GetInput() & 0x0F;
if (DIO != 0x05)
{
printf("The Fintek 81866 digital IO abnormal, abort.\n");
return(1);
}
printf("!!! Pass !!!\n");
return 0;
}
//---------------------------------------------------------------------------
void Dio3Initial(void)
{
unsigned char ucBuf;
// Switch GPIO multi-function pin for gpio 30~37
// Multi Pin Select UART2/GPIOs
// bit[6:5] 0:UART2 / 1:GPIOs
ucBuf = Get_F81866_Reg(0x28);
ucBuf |= BIT5;
Set_F81866_Reg(0x28, ucBuf);
Set_F81866_LD(0x06);
//enable the GP3 group
ucBuf = Get_F81866_Reg(0x30);
ucBuf |= 0x01;
Set_F81866_Reg(0x30, ucBuf);
Set_F81866_Reg(0x88, 0x00);
//Set_F81866_Reg(0xA3, 0xFF);
}
//---------------------------------------------------------------------------
void Dio3SetOutput(unsigned char NewData)
{
Set_F81866_LD(0x06);
Set_F81866_Reg(0x89, NewData);
}
//---------------------------------------------------------------------------
unsigned char Dio3GetInput(void)
{
unsigned char result;
Set_F81866_LD(0x06);
result = Get_F81866_Reg(0x8A);
return (result);
}
54 MI802 User's Manual
//clear
//clr# is high
//clk and clr# is high
//clr# is high
//switch to logic device 6
//define as input mode
//push pull mode
//switch to logic device 6
//switch to logic device 6