Kontron KTA55-pITX Bedienungsanleitung PDF herunterladen (Seite 20)

KTD-S0043-A Page 17 GPIO Interface

KTA55/pITX Software Guide

void WriteGPIO (u8 value)

{

u8 i;

for (i = 0; i < MAX_GPIO; i++)

WriteDigitalIO (i, (value >> i));

}

u8 ReadGPIO (void)

{

u8 i, value = 0;

for (i = 0; i < MAX_GPIO; i++)

value |= ReadDigitalIO (i) << i;

return value;

}

void InitializeGPIO (u8 dir, u8 pu, u8 pd)

{

u8 i;

for (i = 0; i < MAX_GPIO; i++)

SetDirectionIO (i, (dir >> i));

for (i = 0; i < MAX_GPIO; i++)

SetPullupIO (i, (pu >> i));

for (i = 0; i < MAX_GPIO; i++)

SetPulldownIO (i, (pd >> i));

}

void main (void)

{

InitializeGPIO (0x55, 0x00, 0x00); // Pullup enable, Pulldown disable

WriteGPIO (0x0A);

getch ();

WriteGPIO (0xA0);

printf ("\nInput value = 0x%02X\n", ReadGPIO ());

}

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