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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
|
/*
* Copyright 2008 Free Software Foundation, Inc.
*
* This software is distributed under multiple licenses; see the COPYING file in the main directory for licensing information for this specific distribuion.
*
* This use of this software may be subject to additional restrictions.
* See the LEGAL file in the main directory for details.
This program 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.
*/
#ifndef _USRP_DEVICE_H_
#define _USRP_DEVICE_H_
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "radioDevice.h"
#ifdef HAVE_LIBUSRP_3_3 // [
# include <usrp/usrp_standard.h>
# include <usrp/usrp_bytesex.h>
# include <usrp/usrp_prims.h>
#else // HAVE_LIBUSRP_3_3 ][
# include "usrp_standard.h"
# include "usrp_bytesex.h"
# include "usrp_prims.h"
#endif // !HAVE_LIBUSRP_3_3 ]
#include <sys/time.h>
#include <math.h>
#include <string>
#include <iostream>
/** Define types which are not defined in libusrp-3.1 */
#ifndef HAVE_LIBUSRP_3_2
#include <boost/shared_ptr.hpp>
typedef boost::shared_ptr<usrp_standard_tx> usrp_standard_tx_sptr;
typedef boost::shared_ptr<usrp_standard_rx> usrp_standard_rx_sptr;
#endif // HAVE_LIBUSRP_3_2
/** A class to handle a USRP rev 4, with a two RFX900 daughterboards */
class USRPDevice: public RadioDevice {
private:
static const double masterClockRate; ///< the USRP clock rate
double desiredSampleRate; ///< the desired sampling rate
usrp_standard_rx_sptr m_uRx; ///< the USRP receiver
usrp_standard_tx_sptr m_uTx; ///< the USRP transmitter
double actualSampleRate; ///< the actual USRP sampling rate
unsigned int decimRate; ///< the USRP decimation rate
unsigned long long samplesRead; ///< number of samples read from USRP
unsigned long long samplesWritten; ///< number of samples sent to USRP
bool started; ///< flag indicates USRP has started
bool skipRx; ///< set if USRP is transmit-only.
static const unsigned int currDataSize_log2 = 21;
static const unsigned long currDataSize = (1 << currDataSize_log2);
short *data;
unsigned long dataStart;
unsigned long dataEnd;
TIMESTAMP timeStart;
TIMESTAMP timeEnd;
bool isAligned;
Mutex writeLock;
short *currData; ///< internal data buffer when reading from USRP
TIMESTAMP currTimestamp; ///< timestamp of internal data buffer
unsigned currLen; ///< size of internal data buffer
TIMESTAMP timestampOffset; ///< timestamp offset b/w Tx and Rx blocks
TIMESTAMP latestWriteTimestamp; ///< timestamp of most recent ping command
TIMESTAMP pingTimestamp; ///< timestamp of most recent ping response
static const TIMESTAMP PINGOFFSET = 272; ///< undetermined delay b/w ping response timestamp and true receive timestamp
unsigned long hi32Timestamp;
unsigned long lastPktTimestamp;
double rxGain;
#ifdef SWLOOPBACK
short loopbackBuffer[1000000];
int loopbackBufferSize;
double samplePeriod;
struct timeval startTime;
struct timeval lastReadTime;
bool firstRead;
#endif
/** Mess of constants used to control various hardware on the USRP */
static const unsigned POWER_UP = (1 << 7);
static const unsigned RX_TXN = (1 << 6);
static const unsigned RX2_RX1N = (1 << 6);
static const unsigned ENABLE = (1 << 5);
static const unsigned PLL_LOCK_DETECT = (1 << 2);
static const unsigned SPI_ENABLE_TX_A = 0x10;
static const unsigned SPI_ENABLE_RX_A = 0x20;
static const unsigned SPI_ENABLE_TX_B = 0x40;
static const unsigned SPI_ENABLE_RX_B = 0x80;
static const unsigned SPI_FMT_MSB = (0 << 7);
static const unsigned SPI_FMT_HDR_0 = (0 << 5);
static const float LO_OFFSET;
//static const float LO_OFFSET = 4.0e6;
static const unsigned R_DIV = 16;
static const unsigned P = 1;
static const unsigned CP2 = 7;
static const unsigned CP1 = 7;
static const unsigned DIVSEL = 0;
unsigned DIV2; // changes with GSM band
unsigned freq_mult; // changes with GSM band
static const unsigned CPGAIN = 0;
// R-Register Common Values
static const unsigned R_RSV = 0; // bits 23,22
static const unsigned BSC = 3; // bits 21,20 Div by 8 to be safe
static const unsigned TEST = 0; // bit 19
static const unsigned LDP = 1; // bit 18
static const unsigned ABP = 0; // bit 17,16 3ns
// N-Register Common Values
static const unsigned N_RSV = 0; // bit 7
// Control Register Common Values
static const unsigned PD = 0; // bits 21,20 Normal operation
static const unsigned PL = 0; // bits 13,12 11mA
static const unsigned MTLD = 1; // bit 11 enabled
static const unsigned CPG = 0; // bit 10 CP setting 1
static const unsigned CP3S = 0; // bit 9 Normal
static const unsigned PDP = 1; // bit 8 Positive
static const unsigned MUXOUT = 1;// bits 7:5 Digital Lock Detect
static const unsigned CR = 0; // bit 4 Normal
static const unsigned PC = 1; // bits 3,2 Core power 10mA
// ATR register value
static const int FR_ATR_MASK_0 = 20;
static const int FR_ATR_TXVAL_0 = 21;
static const int FR_ATR_RXVAL_0 = 22;
/** Compute register values to tune daughterboard to desired frequency */
bool compute_regs(double freq,
unsigned *R,
unsigned *control,
unsigned *N,
double *actual_freq);
/** Set the transmission frequency */
bool tx_setFreq(double freq, double *actual_freq);
/** Set the receiver frequency */
bool rx_setFreq(double freq, double *actual_freq);
public:
/** Object constructor */
USRPDevice (double _desiredSampleRate);
/** Instantiate the USRP */
bool make(bool skipRx = false);
/** Start the USRP */
bool start();
/** Stop the USRP */
bool stop();
/**
Read samples from the USRP.
@param buf preallocated buf to contain read result
@param len number of samples desired
@param overrun Set if read buffer has been overrun, e.g. data not being read fast enough
@param timestamp The timestamp of the first samples to be read
@param underrun Set if USRP does not have data to transmit, e.g. data not being sent fast enough
@param RSSI The received signal strength of the read result
@return The number of samples actually read
*/
int readSamples(short *buf, int len, bool *overrun,
TIMESTAMP timestamp = 0xffffffff,
bool *underrun = NULL,
unsigned *RSSI = NULL);
/**
Write samples to the USRP.
@param buf Contains the data to be written.
@param len number of samples to write.
@param underrun Set if USRP does not have data to transmit, e.g. data not being sent fast enough
@param timestamp The timestamp of the first sample of the data buffer.
@param isControl Set if data is a control packet, e.g. a ping command
@return The number of samples actually written
*/
int writeSamples(short *buf, int len, bool *underrun,
TIMESTAMP timestamp = 0xffffffff,
bool isControl = false);
/** Update the alignment between the read and write timestamps */
bool updateAlignment(TIMESTAMP timestamp);
/** Set the transmitter frequency */
bool setTxFreq(double wFreq);
/** Set the receiver frequency */
bool setRxFreq(double wFreq);
/** Returns the starting write Timestamp*/
TIMESTAMP initialWriteTimestamp(void) { return 40000;}
/** Returns the starting read Timestamp*/
TIMESTAMP initialReadTimestamp(void) { return 40000;}
/** returns the full-scale transmit amplitude **/
double fullScaleInputValue() {return 13500.0;}
/** returns the full-scale receive amplitude **/
double fullScaleOutputValue() {return 9450.0;}
/** sets the receive chan gain, returns the gain setting **/
double setRxGain(double dB);
/** get the current receive gain */
double getRxGain(void) {return rxGain;}
/** return maximum Rx Gain **/
double maxRxGain(void) {return 97.0;}
/** return minimum Rx Gain **/
double minRxGain(void) {return 7.0;}
/** sets the transmit chan gain, returns the gain setting **/
double setTxGain(double dB);
/** return maximum Tx Gain **/
double maxTxGain(void) {return 0.0;}
/** return minimum Rx Gain **/
double minTxGain(void) {return -20.0;}
/** Return internal status values */
inline double getTxFreq() { return 0;}
inline double getRxFreq() { return 0;}
inline double getSampleRate() {return actualSampleRate;}
inline double numberRead() { return samplesRead; }
inline double numberWritten() { return samplesWritten;}
};
#endif // _USRP_DEVICE_H_
|