New Micros NMIY-0031, Manual

Page: 106 / 188

2 / 2 6 / 2 0 0 2 2 : 0 6 P M 2 / 2 6 / 2 0 0 2 1 0 6
N M I L - 1 0 5 5 2 4 - B I T I / O
C S A M P L E P R O G R A M
main ()
{
while (1)
{
cnfig();
input_ports();
if (cfiga == 0)
{
printf("\nInput a hex value for port A: ");
fscanf(stdin, "%x", &porta_out);
}; /* end if */
if (cfigb == 0)
{
printf("\nInput a hex value for port B: ");
fscanf(stdin, "%x", &portb_out);
}; /* end if */
if (cfigcl == 0)
{
printf("\nInput a hex value for port C-low (bits 0-3): ");
fscanf(stdin, "%x", &portc_out);
portc_out = portc_out & 0x0F;
}; /* end if */
if (cfigch == 0)
{
printf("\nInput a hex value for port C-high (bits 4-7): ");
fscanf(stdin, "%x", &temp);
portc_out = portc_out & (temp & 0xF0);
}; /* end if */
output_ports();
}; /* end while */
} /* end main */
cnfig()
{
cntrol = 0x80;
printf("\nThe direction of the ports needs to be configured.");
printf("\nFor ports A, B, C-low, and C-high,\nenter a 0 for output, or a 1 for input.");
printf("\nPort A ? ");
fscanf(stdin, "%d", &cfiga);
if (cfiga != 0)
= 0x10;
printf("\nPort B ? ");
fscanf(stdin, "%d", &cfigb);
if (cfigb != 0)
= 0x2;
printf("\nPort C-low \(bits 0-3\) ? ");
fscanf(stdin, "%d", &cfigcl);
if (cfigcl != 0)
= 0x1;
printf("\nPort C-high \(bits 4-7\) ? ");
fscanf(stdin, "%d", &cfigch);
if (cfigch != 0)
= 0x8;
pokeb(cntl_reg, cntrol); /* load the control register */
return(0);
} /* end cnfig */