Aaeon EPIC-KBS9-PUC, User Manual

Page: 84 / 89

Appendix C – Digital I/O Ports 17
BO
X PC
EPIC
-K
BS
9-
PUC
C.2 Digital I/O Sample Code
UINT32 SOC_GPIO_BASE_ADDRESS= 0xFDAE06A8 ,SOC_GPIO_VAL= 0 ;
for (i = 0 ; i < 8 ; i++)
{
SOC_GPIO_VAL=MmioRead32(SOC_GPIO_BASE_ADDRESS +8 *i);
if (SetupData.SOCGPPGx_Oe[i]== 0 ) //GPIO set to input
{
SOC_GPIO_VAL |= BIT8; //Set bit 8
SOC_GPIO_VAL &= (~BIT9); //Clear bit 9
}
else if (SetupData.SOCGPPGx_Oe[i]== 1 ) //GPIO set to output
{
SOC_GPIO_VAL |= BIT9; //Set bit 9
SOC_GPIO_VAL &= (~BIT8); //Clear bit 8
if (SetupData.SOCGPPGx_Val[i]== 0 )
SOC_GPIO_VAL &= (~BIT0); //Clear bit 0 ==>Output LOW
else
SOC_GPIO_VAL |= BIT0; //Set bit 0 ==>Output HIGH
}
}