dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2008 Free Software Foundation, Inc. |
| 3 | * |
| 4 | * This software is distributed under the terms of the GNU Public License. |
| 5 | * See the COPYING file in the main directory for details. |
| 6 | * |
| 7 | * This use of this software may be subject to additional restrictions. |
| 8 | * See the LEGAL file in the main directory for details. |
| 9 | |
| 10 | This program is free software: you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation, either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 22 | |
| 23 | */ |
| 24 | |
| 25 | |
| 26 | #ifdef HAVE_CONFIG_H |
| 27 | #include "config.h" |
| 28 | #endif |
| 29 | |
| 30 | #include "radioDevice.h" |
| 31 | |
| 32 | |
| 33 | #include <sys/time.h> |
| 34 | #include <math.h> |
| 35 | #include <string> |
| 36 | #include <iostream> |
| 37 | |
| 38 | |
| 39 | /** A class to handle a USRP rev 4, with a two RFX900 daughterboards */ |
| 40 | class DummyLoad: public RadioDevice { |
| 41 | |
| 42 | private: |
| 43 | |
| 44 | double sampleRate; ///< the desired sampling rate |
| 45 | unsigned long long samplesRead; ///< number of samples read from USRP |
| 46 | unsigned long long samplesWritten; ///< number of samples sent to USRP |
| 47 | |
| 48 | Mutex underrunLock; |
| 49 | |
| 50 | struct timeval startTime, currTime; |
| 51 | |
| 52 | TIMESTAMP currstamp; |
| 53 | short *dummyBurst; |
| 54 | int dummyBurstSz; |
| 55 | int dummyBurstCursor; |
| 56 | bool underrun; |
| 57 | |
| 58 | void updateTime(void); |
| 59 | |
| 60 | public: |
| 61 | |
| 62 | /** Object constructor */ |
| 63 | DummyLoad (double _desiredSampleRate); |
| 64 | |
| 65 | int loadBurst(short *wDummyBurst, int len); |
| 66 | |
| 67 | /** Instantiate the USRP */ |
| 68 | bool make(bool skipRx = false); |
| 69 | |
| 70 | /** Start the USRP */ |
| 71 | bool start(); |
| 72 | |
| 73 | /** Stop the USRP */ |
| 74 | bool stop(); |
| 75 | |
| 76 | /** |
| 77 | Read samples from the USRP. |
| 78 | @param buf preallocated buf to contain read result |
| 79 | @param len number of samples desired |
| 80 | @param overrun Set if read buffer has been overrun, e.g. data not being read fast enough |
| 81 | @param timestamp The timestamp of the first samples to be read |
| 82 | @param underrun Set if USRP does not have data to transmit, e.g. data not being sent fast enough |
| 83 | @param RSSI The received signal strength of the read result |
| 84 | @return The number of samples actually read |
| 85 | */ |
| 86 | int readSamples(short *buf, int len, bool *overrun, |
| 87 | TIMESTAMP timestamp = 0xffffffff, |
| 88 | bool *underrun = NULL, |
| 89 | unsigned *RSSI = NULL); |
| 90 | /** |
| 91 | Write samples to the USRP. |
| 92 | @param buf Contains the data to be written. |
| 93 | @param len number of samples to write. |
| 94 | @param underrun Set if USRP does not have data to transmit, e.g. data not being sent fast enough |
| 95 | @param timestamp The timestamp of the first sample of the data buffer. |
| 96 | @param isControl Set if data is a control packet, e.g. a ping command |
| 97 | @return The number of samples actually written |
| 98 | */ |
| 99 | int writeSamples(short *buf, int len, bool *underrun, |
| 100 | TIMESTAMP timestamp = 0xffffffff, |
| 101 | bool isControl = false); |
| 102 | |
| 103 | /** Update the alignment between the read and write timestamps */ |
| 104 | bool updateAlignment(TIMESTAMP timestamp); |
| 105 | |
| 106 | /** Set the transmitter frequency */ |
| 107 | bool setTxFreq(double wFreq); |
| 108 | |
| 109 | /** Set the receiver frequency */ |
| 110 | bool setRxFreq(double wFreq); |
| 111 | |
| 112 | /** Returns the starting write Timestamp*/ |
| 113 | TIMESTAMP initialWriteTimestamp(void) { return 20000;} |
| 114 | |
| 115 | /** Returns the starting read Timestamp*/ |
| 116 | TIMESTAMP initialReadTimestamp(void) { return 20000;} |
| 117 | |
| 118 | /** returns the full-scale transmit amplitude **/ |
| 119 | double fullScaleInputValue() {return 13500.0;} |
| 120 | |
| 121 | /** returns the full-scale receive amplitude **/ |
| 122 | double fullScaleOutputValue() {return 9450.0;} |
| 123 | |
| 124 | /** Return internal status values */ |
| 125 | inline double getTxFreq() { return 0;} |
| 126 | inline double getRxFreq() { return 0;} |
| 127 | inline double getSampleRate() {return sampleRate;} |
| 128 | inline double numberRead() { return samplesRead; } |
| 129 | inline double numberWritten() { return samplesWritten;} |
| 130 | |
| 131 | }; |
| 132 | |