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Diffstat (limited to 'usrp/host/lib/db_dtt768.cc')
| -rw-r--r-- | usrp/host/lib/db_dtt768.cc | 300 |
1 files changed, 0 insertions, 300 deletions
diff --git a/usrp/host/lib/db_dtt768.cc b/usrp/host/lib/db_dtt768.cc deleted file mode 100644 index 0dfe1a8f3..000000000 --- a/usrp/host/lib/db_dtt768.cc +++ /dev/null @@ -1,300 +0,0 @@ -/* -*- c++ -*- */ -// -// Copyright 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 asversion 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/db_dtt768.h> -#include <db_base_impl.h> - -int -control_byte_4() -{ - int C = 0; // Charge Pump Current, no info on how to choose - int R = 4; // 125 kHz fref - - // int ATP = 7; // Disable internal AGC - return (0x80 | C<<5 | R); -} - -int -control_byte_5(float freq, int agcmode = 1) -{ - if(agcmode) { - if(freq < 150e6) { - return 0x3B; - } - else if(freq < 420e6) { - return 0x7E; - } - else { - return 0xB7; - } - } - else { - if(freq < 150e6) { - return 0x39; - } - else if(freq < 420e6) { - return 0x7C; - } - else { - return 0xB5; - } - } -} - -int -control_byte_6() -{ - int ATC = 0; // AGC time constant = 100ms, 1 = 3S - int IFE = 1; // IF AGC amplifier enable - int AT = 0; // AGC control, ??? - - return (ATC << 5 | IFE << 4 | AT); -} - -int -control_byte_7() -{ - int SAS = 1; // SAW Digital mode - int AGD = 1; // AGC disable - int ADS = 0; // AGC detector into ADC converter - int T = 0; // Test mode, undocumented - return (SAS << 7 | AGD << 5 | ADS << 4 | T); -} - -db_dtt768::db_dtt768(usrp_basic_sptr _usrp, int which) - : db_base(_usrp, which) -{ - /* - * Control custom DTT76803-based daughterboard. - * - * @param usrp: instance of usrp.source_c - * @param which: which side: 0 or 1 corresponding to RX_A or RX_B respectively - * @type which: int - */ - - if(d_which == 0) { - d_i2c_addr = 0x60; - } - else { - d_i2c_addr = 0x62; - } - - d_IF = 44e6; - - d_f_ref = 125e3; - d_inverted = false; - - set_gain((gain_min() + gain_max()) / 2.0); - - bypass_adc_buffers(false); -} - -db_dtt768::~db_dtt768() -{ -} - -float -db_dtt768::gain_min() -{ - return 0; -} - -float -db_dtt768::gain_max() -{ - return 115; -} - -float -db_dtt768::gain_db_per_step() -{ - return 1; -} - -bool -db_dtt768::set_gain(float gain) -{ - assert(gain>=0 && gain<=115); - - float rfgain, ifgain, pgagain; - if(gain > 60) { - rfgain = 60; - gain = gain - 60; - } - else { - rfgain = gain; - gain = 0; - } - - if(gain > 35) { - ifgain = 35; - gain = gain - 35; - } - else { - ifgain = gain; - gain = 0; - } - pgagain = gain; - - _set_rfagc(rfgain); - _set_ifagc(ifgain); - _set_pga(pgagain); - - return true; -} - -double -db_dtt768::freq_min() -{ - return 44e6; -} - -double -db_dtt768::freq_max() -{ - return 900e6; -} - -struct freq_result_t -db_dtt768::set_freq(double target_freq) -{ - /* - * @returns (ok, actual_baseband_freq) where: - * ok is True or False and indicates success or failure, - * actual_baseband_freq is the RF frequency that corresponds to DC in the IF. - */ - - freq_result_t ret = {false, 0.0}; - - if(target_freq < freq_min() || target_freq > freq_max()) { - return ret; - } - - double target_lo_freq = target_freq + d_IF; // High side mixing - - int divisor = (int)(0.5+(target_lo_freq / d_f_ref)); - double actual_lo_freq = d_f_ref*divisor; - - if((divisor & ~0x7fff) != 0) { // must be 15-bits or less - return ret; - } - - // build i2c command string - std::vector<int> buf(6); - buf[0] = (divisor >> 8) & 0xff; // DB1 - buf[1] = divisor & 0xff; // DB2 - buf[2] = control_byte_4(); - buf[3] = control_byte_5(target_freq); - buf[4] = control_byte_6(); - buf[5] = control_byte_7(); - - bool ok = usrp()->write_i2c(d_i2c_addr, int_seq_to_str (buf)); - - d_freq = actual_lo_freq - d_IF; - - ret.ok = ok; - ret.baseband_freq = actual_lo_freq; - - return ret; - -} - -bool -db_dtt768::is_quadrature() -{ - /* - * Return True if this board requires both I & Q analog channels. - * - * This bit of info is useful when setting up the USRP Rx mux register. - */ - - return false; -} - -bool -db_dtt768::spectrum_inverted() -{ - /* - * The 43.75 MHz version is inverted - */ - - return d_inverted; -} - -bool -db_dtt768::set_bw(float bw) -{ - /* - * Choose the SAW filter bandwidth, either 7MHz or 8MHz) - */ - - d_bw = bw; - set_freq(d_freq); - - return true; // FIXME: propagate set_freq result -} - -void -db_dtt768::_set_rfagc(float gain) -{ - assert(gain <= 60 && gain >= 0); - // FIXME this has a 0.5V step between gain = 60 and gain = 59. - // Why are there two cases instead of a single linear case? - float voltage; - if(gain == 60) { - voltage = 4; - } - else { - voltage = gain/60.0 * 2.25 + 1.25; - } - - int dacword = (int)(4096*voltage/1.22/3.3); // 1.22 = opamp gain - - assert(dacword>=0 && dacword<4096); - usrp()->write_aux_dac(d_which, 1, dacword); -} - -void -db_dtt768::_set_ifagc(float gain) -{ - assert(gain <= 35 && gain >= 0); - float voltage = gain/35.0 * 2.1 + 1.4; - int dacword = (int)(4096*voltage/1.22/3.3); // 1.22 = opamp gain - - assert(dacword>=0 && dacword<4096); - usrp()->write_aux_dac(d_which, 0, dacword); -} - -void -db_dtt768::_set_pga(float pga_gain) -{ - assert(pga_gain >=0 && pga_gain <=20); - if(d_which == 0) { - usrp()->set_pga (0, pga_gain); - } - else { - usrp()->set_pga (2, pga_gain); - } -} |