3 * Copyright 2003,2004,2008,2009 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
27 #include <usrp/usrp_basic.h>
28 #include "usrp/usrp_prims.h"
29 #include "usrp_interfaces.h"
30 #include "fpga_regs_common.h"
31 #include "fpga_regs_standard.h"
33 #include "db_boards.h"
34 #include <libusb-1.0/libusb.h>
43 using namespace ad9862;
45 #define NELEM(x) (sizeof (x) / sizeof (x[0]))
47 // These set the buffer size used for each end point using the fast
48 // usb interface. The kernel ends up locking down this much memory.
50 static const int FUSB_BUFFER_SIZE = fusb_sysconfig::default_buffer_size();
51 static const int FUSB_BLOCK_SIZE = fusb_sysconfig::max_block_size();
52 static const int FUSB_NBLOCKS = FUSB_BUFFER_SIZE / FUSB_BLOCK_SIZE;
55 static const double POLLING_INTERVAL = 0.1; // seconds
58 //////////////////////////////////////////////////////////////////
62 ////////////////////////////////////////////////////////////////
69 // These settings give us:
70 // CLKOUT1 = CLKIN = 64 MHz
71 // CLKOUT2 = CLKIN = 64 MHz
72 // ADC is clocked at 64 MHz
73 // DAC is clocked at 128 MHz
75 static unsigned char common_regs[] = {
77 REG_DLL, (DLL_DISABLE_INTERNAL_XTAL_OSC
80 REG_CLKOUT, CLKOUT2_EQ_DLL_OVER_2,
81 REG_AUX_ADC_CLK, AUX_ADC_CLK_CLK_OVER_4
84 usrp_basic::usrp_basic (int which_board,
85 struct libusb_device_handle *
86 open_interface (struct libusb_device *dev),
87 const std::string fpga_filename,
88 const std::string firmware_filename)
89 : d_udh (0), d_ctx (0),
90 d_usb_data_rate (16000000), // SWAG, see below
91 d_bytes_per_poll ((int) (POLLING_INTERVAL * d_usb_data_rate)),
92 d_verbose (false), d_fpga_master_clock_freq(64000000), d_db(2)
95 * SWAG: Scientific Wild Ass Guess.
97 * d_usb_data_rate is used only to determine how often to poll for over- and under-runs.
98 * We defualt it to 1/2 of our best case. Classes derived from usrp_basic (e.g.,
99 * usrp_standard_tx and usrp_standard_rx) call set_usb_data_rate() to tell us the
100 * actual rate. This doesn't change our throughput, that's determined by the signal
101 * processing code in the FPGA (which we know nothing about), and the system limits
102 * determined by libusb, fusb_*, and the underlying drivers.
104 memset (d_fpga_shadows, 0, sizeof (d_fpga_shadows));
106 d_ctx = usrp_one_time_init(true);
108 if (!usrp_load_standard_bits (which_board, false, fpga_filename, firmware_filename, d_ctx))
109 throw std::runtime_error ("usrp_basic/usrp_load_standard_bits");
111 struct libusb_device *dev = usrp_find_device (which_board, false, d_ctx);
113 fprintf (stderr, "usrp_basic: can't find usrp[%d]\n", which_board);
114 throw std::runtime_error ("usrp_basic/usrp_find_device");
117 if (!(usrp_usrp_p(dev) && usrp_hw_rev(dev) >= 1)){
118 fprintf (stderr, "usrp_basic: sorry, this code only works with USRP revs >= 1\n");
119 throw std::runtime_error ("usrp_basic/bad_rev");
122 if ((d_udh = open_interface (dev)) == 0)
123 throw std::runtime_error ("usrp_basic/open_interface");
125 // initialize registers that are common to rx and tx
127 if (!usrp_9862_write_many_all (d_udh, common_regs, sizeof (common_regs))){
128 fprintf (stderr, "usrp_basic: failed to init common AD9862 regs\n");
129 throw std::runtime_error ("usrp_basic/init_9862");
132 _write_fpga_reg (FR_MODE, 0); // ensure we're in normal mode
133 _write_fpga_reg (FR_DEBUG_EN, 0); // disable debug outputs
137 usrp_basic::~usrp_basic ()
139 // shutdown_daughterboards(); // call from ~usrp_basic_{tx,rx}
141 d_db.resize(0); // forget db shared ptrs
144 libusb_close (d_udh);
146 // Each object should be running in it's own context. If running in default
147 // (NULL) context then something went wrong.
149 assert (d_ctx != NULL);