New Micros NMIY-0031, Руководство пользователя

Страница: 130 / 188

2 / 2 6 / 2 0 0 2 2 : 0 6 P M 2 / 2 6 / 2 0 0 2 1 3 0
N M I L - 7 0 2 2 8 - C H A N N E L R E L A Y
C S A M P L E P R O G R A M
gen_mask() /* generate bit mask for output */
{
if (relaynumber > 8) /* check range */
relaynumber = 8;
else if (relaynumber < 1)
relaynumber = 1;
bitmask = 1;
if (relaynumber > 1)
bitmask = bitmask << (relaynumber - 1);
} /* end gen mask */
get_bit() /* get relay number to change from user */
{
printf("\nEnter the number of a relay to change (1..8): ");
scanf("%d", &relaynumber);
printf("\nDo you want to turn it on (1) or off(0)?");
scanf("%d", &onoff);
} /* end getbit */
initialize()
{
ramcopy = 0;
pokeb(PORT, 0);
} /* end initialize */
turnoff() /* output zero bit */
{
ramcopy = ramcopy & ~bitmask;
pokeb(PORT, ramcopy);
} /* end turnoff */
turnon() /* output one bit */
{
ramcopy = ramcopy | bitmask;
pokeb(PORT, ramcopy);
} /* end turnon */