WDT EmETXe-i92U0, User Manual

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Appendix
Appendix B: DIO Sample Code
/*---------------------------------------------------------------------------*/
#include “math.h”
#include “stdio.h”
#include “dos.h”
void GPIOMode(int iMode);
void GPIOData(int iData);
int GPIOStatus();
int main(void)
{
int iInput;
GPIOMode(0xF);
delay(10000);
GPIOData(0x0A);
delay(30000);
iInput = GPIOStatus();
printf(“ Data : %2x \n”,iInput);
GPIOData(0x05);
delay(30000);
iInput = GPIOStatus();
printf(“ Data : %2x \n”,iInput);
return 0;
}
void GPIOMode(int iMode)
{
outportb(0x66,0xEB); /* Select DIO pin to output or input */
delay(2000);
outportb(0x62,iMode);
}
void GPIOData(int iData)
{
outportb(0x66,0xEA); /* Set DIO output pin status */
delay(2000);
outportb(0x62,iData);
}
int GPIOStatus()
{
int iStatus;
outportb(0x66,0xEC); /* Get DIO pin status */
delay(2000);
iStatus = inportb(0x62);
return iStatus;
}