DFI AL9A2, User Manual

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www.d fi .com Chapter 6 GPIO Programming Guide
44
Chapter 6
Chapter 6 - GPIO Programming Guide
Function Description
Get_EC_Data (unsigned char ucData): Read a Byte data from EC.
Write_EC_Data (unsigned char ucData, unsigned char Data): Write a Byte data to EC.
Sample Code
GPIO Input Process
EC_DIO_Read_Input()
{
BYTE Data;
//Pin0-3 Input Mode
Data = Get_EC_Data(0xBA);
Data |= 0x80;
Write_EC_Data(0xBA, Data);
while(((Get_EC_Data(0xBA) >> 7)&0x01))
{
Data = Get_EC_Data(0xBA);
}
Return Data ;
}
GPIO Output Process
EC_DIO_Write_Output(unsigned char udata)
{
//Pin4-7 Output Mode
udata <<= 4;
udata |= 0x01;
Write_EC_Data(0xBB, udata);
return 0;
EC_DIO_Read_Output()
{
BYTE Data;
//Pin4-7 Output Mode
Write_EC_Data(0xBB, 0x02);
Delay;
Data = Get_EC_Data(0xBB);
Data >>= 4;
Return Data ;
}