1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/* -*- c++ -*- */
/*
* Copyright 2003,2004,2008,2009 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 <usrp/usrp_basic.h>
#include "usrp/usrp_prims.h"
#include "usrp_interfaces.h"
#include "fpga_regs_common.h"
#include "fpga_regs_standard.h"
#include "fusb.h"
#include "db_boards.h"
#include <usb.h>
#include <stdexcept>
#include <assert.h>
#include <math.h>
#include <ad9862.h>
#include <string.h>
#include <cstdio>
using namespace ad9862;
#define NELEM(x) (sizeof (x) / sizeof (x[0]))
static const double POLLING_INTERVAL = 0.1; // seconds
//////////////////////////////////////////////////////////////////
//
// usrp_basic
//
////////////////////////////////////////////////////////////////
// Given:
// CLKIN = 64 MHz
// CLKSEL pin = high
//
// CLKOUT1 = CLKIN = 64 MHz
// CLKOUT2 = CLKIN = 64 MHz
// ADC is clocked at 64 MHz
// DAC is clocked at 128 MHz
static unsigned char common_regs[] = {
REG_GENERAL, 0,
REG_DLL, (DLL_DISABLE_INTERNAL_XTAL_OSC
| DLL_MULT_2X
| DLL_FAST),
REG_CLKOUT, CLKOUT2_EQ_DLL_OVER_2,
REG_AUX_ADC_CLK, AUX_ADC_CLK_CLK_OVER_4
};
usrp_basic::usrp_basic (int which_board,
struct usb_dev_handle *
open_interface (struct usb_device *dev),
const std::string fpga_filename,
const std::string firmware_filename)
: d_udh (0),
d_usb_data_rate (16000000), // SWAG, see below
d_bytes_per_poll ((int) (POLLING_INTERVAL * d_usb_data_rate)),
d_verbose (false), d_fpga_master_clock_freq(64000000), d_db(2)
{
/*
* SWAG: Scientific Wild Ass Guess.
*
* d_usb_data_rate is used only to determine how often to poll for over- and under-runs.
* We defualt it to 1/2 of our best case. Classes derived from usrp_basic (e.g.,
* usrp_standard_tx and usrp_standard_rx) call set_usb_data_rate() to tell us the
* actual rate. This doesn't change our throughput, that's determined by the signal
* processing code in the FPGA (which we know nothing about), and the system limits
* determined by libusb, fusb_*, and the underlying drivers.
*/
memset (d_fpga_shadows, 0, sizeof (d_fpga_shadows));
usrp_one_time_init ();
if (!usrp_load_standard_bits (which_board, false, fpga_filename, firmware_filename))
throw std::runtime_error ("usrp_basic/usrp_load_standard_bits");
struct usb_device *dev = usrp_find_device (which_board);
if (dev == 0){
fprintf (stderr, "usrp_basic: can't find usrp[%d]\n", which_board);
throw std::runtime_error ("usrp_basic/usrp_find_device");
}
if (!(usrp_usrp_p(dev) && usrp_hw_rev(dev) >= 1)){
fprintf (stderr, "usrp_basic: sorry, this code only works with USRP revs >= 1\n");
throw std::runtime_error ("usrp_basic/bad_rev");
}
if ((d_udh = open_interface (dev)) == 0)
throw std::runtime_error ("usrp_basic/open_interface");
// initialize registers that are common to rx and tx
if (!usrp_9862_write_many_all (d_udh, common_regs, sizeof (common_regs))){
fprintf (stderr, "usrp_basic: failed to init common AD9862 regs\n");
throw std::runtime_error ("usrp_basic/init_9862");
}
_write_fpga_reg (FR_MODE, 0); // ensure we're in normal mode
_write_fpga_reg (FR_DEBUG_EN, 0); // disable debug outputs
}
usrp_basic::~usrp_basic ()
{
// shutdown_daughterboards(); // call from ~usrp_basic_{tx,rx}
d_db.resize(0); // forget db shared ptrs
if (d_udh)
usb_close (d_udh);
}
|
