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
|
//
// Copyright 2010-2011 Ettus Research LLC
// Copyright 2018 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: GPL-3.0-or-later
//
#include <uhd/config.hpp>
#include <uhd/exception.hpp>
#include <uhd/types/dict.hpp>
#include <uhd/utils/algorithm.hpp>
#include <uhd/utils/log.hpp>
#include <boost/assign/list_of.hpp>
#include <boost/format.hpp>
#include <utility>
#include <vector>
#include <string>
#ifndef INCLUDED_USRP1_CALC_MUX_HPP
#define INCLUDED_USRP1_CALC_MUX_HPP
//db_name, conn_type for the mux calculations below...
typedef std::pair<std::string, std::string> mapping_pair_t;
/***********************************************************************
* Calculate the RX mux value:
* The I and Q mux values are intentionally reversed to flip I and Q
* to account for the reversal in the type conversion routines.
**********************************************************************/
static int calc_rx_mux_pair(int adc_for_i, int adc_for_q){
return (adc_for_i << 0) | (adc_for_q << 2);
}
/*!
* 3 2 1 0
* 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
* +-----------------------+-------+-------+-------+-------+-+-----+
* | must be zero | Q3| I3| Q2| I2| Q1| I1| Q0| I0|Z| NCH |
* +-----------------------+-------+-------+-------+-------+-+-----+
*/
static uint32_t calc_rx_mux(const std::vector<mapping_pair_t> &mapping){
//create look-up-table for mapping dboard name and connection type to ADC flags
static const int ADC0 = 0, ADC1 = 1, ADC2 = 2, ADC3 = 3;
static const uhd::dict<std::string, uhd::dict<std::string, int> > name_to_conn_to_flag = boost::assign::map_list_of
("A", boost::assign::map_list_of
("IQ", calc_rx_mux_pair(ADC0, ADC1)) //I and Q
("QI", calc_rx_mux_pair(ADC1, ADC0)) //I and Q
("I", calc_rx_mux_pair(ADC0, ADC0)) //I and Q (Q identical but ignored Z=1)
("Q", calc_rx_mux_pair(ADC1, ADC1)) //I and Q (Q identical but ignored Z=1)
)
("B", boost::assign::map_list_of
("IQ", calc_rx_mux_pair(ADC2, ADC3)) //I and Q
("QI", calc_rx_mux_pair(ADC3, ADC2)) //I and Q
("I", calc_rx_mux_pair(ADC2, ADC2)) //I and Q (Q identical but ignored Z=1)
("Q", calc_rx_mux_pair(ADC3, ADC3)) //I and Q (Q identical but ignored Z=1)
)
;
//extract the number of channels
const size_t nchan = mapping.size();
//calculate the channel flags
int channel_flags = 0;
size_t num_reals = 0, num_quads = 0;
for(const mapping_pair_t &pair: uhd::reversed(mapping)){
const std::string name = pair.first, conn = pair.second;
if (conn == "IQ" or conn == "QI") num_quads++;
if (conn == "I" or conn == "Q") num_reals++;
channel_flags = (channel_flags << 4) | name_to_conn_to_flag[name][conn];
}
//calculate Z:
// for all real sources: Z = 1
// for all quadrature sources: Z = 0
// for mixed sources: warning + Z = 0
int Z = (num_quads > 0)? 0 : 1;
if (num_quads != 0 and num_reals != 0) UHD_LOGGER_WARNING("USRP1") << boost::format(
"Mixing real and quadrature rx subdevices is not supported.\n"
"The Q input to the real source(s) will be non-zero.\n"
);
//calculate the rx mux value
return ((channel_flags & 0xffff) << 4) | ((Z & 0x1) << 3) | ((nchan & 0x7) << 0);
}
/***********************************************************************
* Calculate the TX mux value:
* The I and Q mux values are intentionally reversed to flip I and Q
* to account for the reversal in the type conversion routines.
**********************************************************************/
static int calc_tx_mux_pair(int chn_for_i, int chn_for_q){
return (chn_for_i << 0) | (chn_for_q << 4);
}
/*!
* 3 2 1 0
* 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
* +-----------------------+-------+-------+-------+-------+-+-----+
* | | DAC1Q | DAC1I | DAC0Q | DAC0I |0| NCH |
* +-----------------------------------------------+-------+-+-----+
*/
static uint32_t calc_tx_mux(const std::vector<mapping_pair_t> &mapping){
//create look-up-table for mapping channel number and connection type to flags
static const int ENB = 1 << 3, CHAN_I0 = 0, CHAN_Q0 = 1, CHAN_I1 = 2, CHAN_Q1 = 3;
static const uhd::dict<size_t, uhd::dict<std::string, int> > chan_to_conn_to_flag = boost::assign::map_list_of
(0, boost::assign::map_list_of
("IQ", calc_tx_mux_pair(CHAN_I0 | ENB, CHAN_Q0 | ENB))
("QI", calc_tx_mux_pair(CHAN_Q0 | ENB, CHAN_I0 | ENB))
("I", calc_tx_mux_pair(CHAN_I0 | ENB, 0 ))
("Q", calc_tx_mux_pair(0, CHAN_I0 | ENB))
)
(1, boost::assign::map_list_of
("IQ", calc_tx_mux_pair(CHAN_I1 | ENB, CHAN_Q1 | ENB))
("QI", calc_tx_mux_pair(CHAN_Q1 | ENB, CHAN_I1 | ENB))
("I", calc_tx_mux_pair(CHAN_I1 | ENB, 0 ))
("Q", calc_tx_mux_pair(0, CHAN_I1 | ENB))
)
;
//extract the number of channels
size_t nchan = mapping.size();
//calculate the channel flags
int channel_flags = 0, chan = 0;
uhd::dict<std::string, int> slot_to_chan_count = boost::assign::map_list_of("A", 0)("B", 0);
for(const mapping_pair_t &pair: mapping){
const std::string name = pair.first, conn = pair.second;
//combine the channel flags: shift for slot A vs B
if (name == "A") channel_flags |= chan_to_conn_to_flag[chan][conn] << 0;
if (name == "B") channel_flags |= chan_to_conn_to_flag[chan][conn] << 8;
//sanity check, only 1 channel per slot
slot_to_chan_count[name]++;
if (slot_to_chan_count[name] > 1) throw uhd::value_error(
"cannot assign dboard slot to multiple channels: " + name
);
//increment for the next channel
chan++;
}
//calculate the tx mux value
return ((channel_flags & 0xffff) << 4) | ((nchan & 0x7) << 0);
}
#endif /* INCLUDED_USRP1_CALC_MUX_HPP */
|
