/* -*- c++ -*- */
/*
* Copyright 2003,2004 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <usb.h> /* needed for usb functions */
#include <getopt.h>
#include <assert.h>
#include <math.h>
#include "time_stuff.h"
#include "usrp_standard.h"
#include "usrp_bytesex.h"
#ifdef HAVE_SCHED_H
#include <sched.h>
#endif
char *prog_name;
static bool test_output (usrp_standard_tx *utx, int max_bytes, double ampl,
bool dc_p, bool counting_p);
static void
set_progname (char *path)
{
char *p = strrchr (path, '/');
if (p != 0)
prog_name = p+1;
else
prog_name = path;
}
static void
usage ()
{
fprintf (stderr,
"usage: %s [-f] [-v] [-d] [-c] [-a <ampl>][-I <interp>] [-F freq] [-D]\n", prog_name);
fprintf (stderr, " [-f] loop forever\n");
fprintf (stderr, " [-M] how many Megabytes to transfer (default 128)\n");
fprintf (stderr, " [-v] verbose\n");
fprintf (stderr, " [-d] dump registers\n");
// fprintf (stderr, " [-l] digital loopback in FPGA\n");
fprintf (stderr, " [-c] Tx counting sequence\n");
fprintf (stderr, " [-D] DC output\n");
fprintf (stderr, " [-B <fusb_block_size>] set fast usb block_size\n");
fprintf (stderr, " [-N <fusb_nblocks>] set fast usb nblocks\n");
fprintf (stderr, " [-R] set real time scheduling: SCHED_FIFO; pri = midpoint\n");
exit (1);
}
static void
die (const char *msg)
{
fprintf (stderr, "die: %s: %s\n", prog_name, msg);
exit (1);
}
static void
dump_codec_regs (usrp_basic *u, int which_codec, FILE *fp)
{
for (int i = 0; i < 64; i++){
unsigned char v;
u->_read_9862 (which_codec, i, &v);
fprintf (fp, "%2d: 0x%02x\n", i, v);
}
fflush (fp);
}
static void
do_dump_codec_regs (usrp_basic *u)
{
char name[100];
strcpy (name, "regsXXXXXX");
int fd = mkstemp (name);
if (fd == -1){
perror (name);
}
else {
FILE *fp = fdopen (fd, "w");
dump_codec_regs (u, 0, fp);
fclose (fp);
}
}
int
main (int argc, char **argv)
{
bool verbose_p = false;
bool dump_regs_p = false;
bool dc_p = false;
// bool loopback_p = false;
bool counting_p = false;
int max_bytes = 128 * (1L << 20);
int ch;
int which_board = 0;
int interp = 16; // 32.0 MB/sec
double center_freq = 0;
double ampl = 10000;
int fusb_block_size = 0;
int fusb_nblocks = 0;
bool realtime_p = false;
set_progname (argv[0]);
while ((ch = getopt (argc, argv, "vfdcI:F:a:DM:B:N:R")) != EOF){
switch (ch){
case 'f':
max_bytes = 0;
break;
case 'v':
verbose_p = true;
break;
case 'd':
dump_regs_p = true;
break;
case 'D':
dc_p = true;
break;
#if 0
case 'l':
loopback_p = true;
break;
#endif
case 'c':
counting_p = true;
break;
case 'I':
interp = strtol (optarg, 0, 0);
break;
case 'F':
center_freq = strtod (optarg, 0);
break;
case 'a':
ampl = strtod (optarg, 0);
break;
case 'M':
max_bytes = strtol (optarg, 0, 0) * (1L << 20);
if (max_bytes < 0) max_bytes = 0;
break;
case 'B':
fusb_block_size = strtol (optarg, 0, 0);
break;
case 'N':
fusb_nblocks = strtol (optarg, 0, 0);
break;
case 'R':
realtime_p = true;
break;
default:
usage ();
}
}
#ifdef HAVE_SCHED_SETSCHEDULER
if (realtime_p){
int policy = SCHED_FIFO;
int pri = (sched_get_priority_max (policy) - sched_get_priority_min (policy)) / 2;
int pid = 0; // this process
struct sched_param param;
memset(¶m, 0, sizeof(param));
param.sched_priority = pri;
int result = sched_setscheduler(pid, policy, ¶m);
if (result != 0){
perror ("sched_setscheduler: failed to set real time priority");
}
else
printf("SCHED_FIFO enabled with priority = %d\n", pri);
}
#endif
usrp_standard_tx *utx;
utx = usrp_standard_tx::make (which_board,
interp,
1, // nchan
-1, // mux
fusb_block_size,
fusb_nblocks);
if (utx == 0)
die ("usrp_standard_tx::make");
if (!utx->set_tx_freq (0, center_freq))
die ("utx->set_tx_freq");
if (dump_regs_p)
do_dump_codec_regs (utx);
fflush (stdout);
fflush (stderr);
utx->start(); // start data xfers
test_output (utx, max_bytes, ampl, dc_p, counting_p);
delete utx;
return 0;
}
static bool
test_output (usrp_standard_tx *utx, int max_bytes, double ampl,
bool dc_p, bool counting_p)
{
static const int BUFSIZE = utx->block_size();
static const int N = BUFSIZE/sizeof (short);
short buf[N];
int nbytes = 0;
int counter = 0;
static const int PERIOD = 65; // any value is valid
static const int PATLEN = 2 * PERIOD;
short pattern[PATLEN];
for (int i = 0; i < PERIOD; i++){
if (dc_p){
pattern[2*i+0] = host_to_usrp_short ((short) ampl);
pattern[2*i+1] = host_to_usrp_short ((short) 0);
}
else {
pattern[2*i+0] = host_to_usrp_short ((short) (ampl * cos (2*M_PI * i / PERIOD)));
pattern[2*i+1] = host_to_usrp_short ((short) (ampl * sin (2*M_PI * i / PERIOD)));
}
}
double start_wall_time = get_elapsed_time ();
double start_cpu_time = get_cpu_usage ();
bool underrun;
int nunderruns = 0;
int pi = 0;
for (nbytes = 0; max_bytes == 0 || nbytes < max_bytes; nbytes += BUFSIZE){
if (counting_p){
for (int i = 0; i < N; i++)
buf[i] = host_to_usrp_short (counter++ & 0xffff);
}
else {
for (int i = 0; i < N; i++){
buf[i] = pattern[pi];
pi++;
if (pi >= PATLEN)
pi = 0;
}
}
int ret = utx->write (buf, sizeof (buf), &underrun);
if ((unsigned) ret != sizeof (buf)){
fprintf (stderr, "test_output: error, ret = %d\n", ret);
}
if (underrun){
nunderruns++;
printf ("tx_underrun\n");
//printf ("tx_underrun %9d %6d\n", nbytes, nbytes/BUFSIZE);
}
}
utx->wait_for_completion ();
double stop_wall_time = get_elapsed_time ();
double stop_cpu_time = get_cpu_usage ();
double delta_wall = stop_wall_time - start_wall_time;
double delta_cpu = stop_cpu_time - start_cpu_time;
printf ("xfered %.3g bytes in %.3g seconds. %.4g bytes/sec. cpu time = %.3g\n",
(double) max_bytes, delta_wall, max_bytes / delta_wall, delta_cpu);
printf ("%d underruns\n", nunderruns);
return true;
}