==== [[Linux]] [[Driver]] : Par Port ====

[[ToDo]] Need to lean more on parport handler :

http://lwn.net/Articles/driver-porting/

  cat > ./parport.c <<EOF

  #include <stdio.h>
  #include <unistd.h>
  #include <asm/io.h>

  #define PORT 0x378

  char tmp=0;
  int main() {
  if ( ioperm( PORT,1,1)) { perror("no perms"); exit(-1); }
  outb( tmp, PORT);
  return 0;
  }
EOF
  # EOF for cat

  make parport

  ./parport ; echo $?
  ## no perms: Operation not permitted
  ## 255

  su --
  chmod u+s ./parport
  ./parport ; echo $?
  ## 0


  * http://www.freesoftwaremagazine.com/articles/drivers_linux?page=0%2C7
  * http://dx.com/p/powersync-usb-2-0-male-to-25-pin-d-sub-female-cable-blue-180cm-130338?item=23


===== MORE =====

@TaG: [[adc]] [[linux-kernel]] [[paralel]] [[parallel]] CupS