Embedded Systems Design, 2nd Edition

418 Embedded systems design

printf(“\nTime out = %d”,time_out);

printf(“ Transfers attempted: %d\n”,j);

} /* end of data log ELSE */

} while ( (inportb(LPT1+1) & 0x20) == 0x00);

/*

* We are quitting the program so restore and close...

*/

restore();

printf(“ Quitting TCLOG now...\n”);

} /* end of MAIN() */

/*

* This is where the sub-routines live that control the tick ...

*/

void set_rate(int Hz /* This is the sample rate we need */)

{

int rate_hi, rate_lo; /* low and high bytes to program the timer */

int num; /* temp value */

printf(“Changing the BIOS 1/18th tick rate to 1/%d\n”,Hz);

/*

* First calculate the values we need to program...

* If the rate ...