Kontron KTLX800-pITX - Manual (Page 19)

KTD-S0023-A Page 16 CPLD Interface
KTLX800/pITX Software Guide
5.2.3 Fan Control Example
#include <stdio.h>
#include <dos.h>
#include <conio.h>
#define CPLD_BASE_ADDR 0xA80
#define FAN_CTRL_INDEX 0x06
#define FAN_MASK 0x0F
#define RESERVED_MASK 0xF0
void SetFanVal (unsigned char value)
{
unsigned
char reg;
outp (CPLD_BASE_ADDR, FAN_CTRL_INDEX);
reg = inp (CPLD_BASE_ADDR+1);
reg &= RESERVED_MASK;
value &= FAN_MASK;
value |= reg;
outp (CPLD_BASE_ADDR+1, value);
}
void main (void)
{
SetFanVal
(0x05);
getch ();
SetFanVal (0x0F);
}