light9 Files · light8/parport.c

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Location: light9/light8/parport.c

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dmcc

The FlyingFader will accept keyboard values and fade to them over 1.5
The FlyingFader will accept keyboard values and fade to them over 1.5
seconds. Combinations of control and alt change that speed. RMB
also creates a fade and LMB will cancel them. Colors are pretty
and informative. Fades can be created manually with the newfade()
function.

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <asm/io.h>
#include <fcntl.h>
#include <Python.h>

void getparport() {
    if( ioperm(888,3,1) ) {
      printf("Couldn't get parallel port at 888-890\n");

      // the following doesn't have any effect!
      PyErr_SetString(PyExc_IOError,"Couldn't get parallel port at 888-890");
    } 
}

void outdata(unsigned char val) {
  outb(val,888);
}

void outcontrol( unsigned char val ) {
  outb(val,890);
}

void outbyte( unsigned char val ) {
  // set data, raise clock, lower clock
  outdata(val);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(2);
  outcontrol(3);
}
void outstart() {
  // send start code: pin 14 high, 5ms to let a dmx cycle finish,
  // then pin14 low (pin1 stays low)
  outcontrol(1);
  usleep(5000);
  outcontrol(3);
}