udpdis.c

/*----------------------------------------------------------------------
 * Copyright (c) 2019,2021 XIA LLC
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met:
 *
 *   * Redistributions of source code must retain the above 
 *     copyright notice, this list of conditions and the 
 *     following disclaimer.
 *   * Redistributions in binary form must reproduce the 
 *     above copyright notice, this list of conditions and the 
 *     following disclaimer in the documentation and/or other 
 *     materials provided with the distribution.
 *   * Neither the name of XIA LLC
 *     nor the names of its contributors may be used to endorse 
 *     or promote products derived from this software without 
 *     specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
 * IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 
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 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE.
 *----------------------------------------------------------------------*/

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <math.h>
#include <time.h>
#include <signal.h>
#include <errno.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/file.h>
// need to compile with -lm option

#include "PixieNetDefs.h"
#include "PixieNetCommon.h"


int main(void) {

  int fd;
  void *map_addr;
  int size = 4096;
  volatile unsigned int *mapped;

  // *************** PS/PL IO initialization *********************
  // open the device for PD register I/O
  fd = open("/dev/uio0", O_RDWR);
  if (fd < 0) {
    perror("Failed to open devfile");
    return -2;
  }

  /* no locking
  //Lock the PL address space so multiple programs cant step on eachother.
  if( flock( fd, LOCK_EX | LOCK_NB ) )
  {
    printf( "Failed to get file lock on /dev/uio0\n" );
    return -3;
  }
  */

  map_addr = mmap( NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);

  if (map_addr == MAP_FAILED) {
    perror("Failed to mmap");
    return -4;
  }

  mapped = (unsigned int *) map_addr;


  // --------------------------------------------------------
  // ------------------- Main code begins --------------------
  // --------------------------------------------------------



  // ********************** Run Stop **********************

  // set nLive bit to stop run
  mapped[AMZ_DEVICESEL] = CS_MZ;	 // select MZ
  mapped[AMZ_CSRIN] = 0x0000; // all off       
  // todo: there may be events left in the buffers.
           
  // final RS
  mapped[AMZ_DEVICESEL] = CS_MZ;
  read_print_runstats_XL_2x4(0, 0, mapped);  // print all, print to file
  read_print_rates_XL_2x4(0,mapped);
  mapped[AMZ_DEVICESEL] = CS_MZ;

  printf("UDP DAQ stopped\n");

  // clean up  
  // flock( fd, LOCK_UN );   // not locked above
  munmap(map_addr, size);
  close(fd);
  return 0;
}