Intel MB890 user manual Appendix

APPENDIX

//=====================================================================

//THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY

//KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE

//IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR

//PURPOSE.

//===================================================================== #include <dos.h>

#include <conio.h> #include <stdio.h> #include <stdlib.h> #include "W627HF.H" //===================================================================== void ClrKbBuf(void);

int main (int argc, char *argv[]); //===================================================================== int main (int argc, char *argv[])

{

unsigned char ucDO = 0;	//data for digital output
unsigned char ucDI;	//data for digital input
unsigned char ucBuf;
Set_W627HF_LD( 0x07);	//switch to logic device 7
Set_W627HF_Reg(0xF1, 0x00);	//clear
ucDI = Get_W627HF_Reg(0xF1) & 0x0F;

ClrKbBuf();

while(1)

{

ucDO++;

Set_W627HF_Reg(0xF1, ((ucDO & 0x0F) << 4)); ucBuf = Get_W627HF_Reg(0xF1) & 0x0F;

if (ucBuf != ucDI)

{

ucDI = ucBuf;

printf("Digital I/O Input Changed. Current Data is 0x%X\n",ucDI);

}

if (kbhit())

{

getch();

break;

}

delay(500);

}

return 0;

}

//===================================================================== void ClrKbBuf(void)

{

while(kbhit())

{ getch(); }

}

//---------------------------------------------------------------------------

MB890 User’s Manual 61