I want to make 1 0 1 (pin no 16) of parallel port using C

[manish12]

printer port q ?

i want to make 1 0 1 (pin no 16) of parallel port useing c language . and whie doing so , no other pin status alter .

ref

0x378 = 8 bit
0x379 = 5 bit
0x37a = 4 bit (msb 17 16 14 1 lsb of 25 pin connector )

any small code ?

 

[rdbindia]

printer port q ?

use

temp = 0x0f

for (;
{
temp ^= 0x04
outp(0x37a, temp);
}

 

[manish12]

Re: printer port q ?

what was i discovered is as follows

"
{
int temp;
/* ~RD WR ~A1 ~A0 */
temp = inportb(CONTROL) ; /* xxxx read the control port */

temp = (temp | 0x4) & 0xF ; /* x1xx wr =1 and rest is unafected */

outportb(CONTROL,temp) ; /* x1xx sent it to control port */

delay(3); /* some delay */

temp = inportb(CONTROL) ; /* xxxx read the control port */

temp = (temp & 0xB) & 0xF ; /* x0xx wr =0 and rest is unafected */

outportb(CONTROL,temp) ; /*x0xx sent it to control port */

delay(3); /* some delay */

temp = inportb(CONTROL) ; /* xxxx read the control port */

temp = (temp | 0x4) & 0xF ; /* x1xx wr =1 and rest is unafected */

outportb(CONTROL,temp) ; /* sent it to control port */

delay(3);
}

"