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
|
//
// Copyright 2010-2011,2015 Ettus Research LLC
// Copyright 2018 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: GPL-3.0-or-later
//
#include <uhd/types/byte_vector.hpp>
#include <uhd/usrp/dboard_eeprom.hpp>
#include <uhd/exception.hpp>
#include <uhd/utils/log.hpp>
#include <boost/format.hpp>
#include <boost/lexical_cast.hpp>
#include <algorithm>
#include <sstream>
using namespace uhd;
using namespace uhd::usrp;
////////////////////////////////////////////////////////////////////////
// format of daughterboard EEPROM
// 00: 0xDB code for ``I'm a daughterboard''
// 01: .. Daughterboard ID (LSB)
// 02: .. Daughterboard ID (MSB)
// 03: .. io bits 7-0 direction (bit set if it's an output from m'board)
// 04: .. io bits 15-8 direction (bit set if it's an output from m'board)
// 05: .. ADC0 DC offset correction (LSB)
// 06: .. ADC0 DC offset correction (MSB)
// 07: .. ADC1 DC offset correction (LSB)
// 08: .. ADC1 DC offset correction (MSB)
// ...
// 1f: .. negative of the sum of bytes [0x00, 0x1e]
#define DB_EEPROM_MAGIC 0x00
#define DB_EEPROM_MAGIC_VALUE 0xDB
#define DB_EEPROM_ID_LSB 0x01
#define DB_EEPROM_ID_MSB 0x02
#define DB_EEPROM_REV_LSB 0x03
#define DB_EEPROM_REV_MSB 0x04
#define DB_EEPROM_OFFSET_0_LSB 0x05 // offset correction for ADC or DAC 0
#define DB_EEPROM_OFFSET_0_MSB 0x06
#define DB_EEPROM_OFFSET_1_LSB 0x07 // offset correction for ADC or DAC 1
#define DB_EEPROM_OFFSET_1_MSB 0x08
#define DB_EEPROM_SERIAL 0x09
#define DB_EEPROM_SERIAL_LEN 0x09 //9 ASCII characters
#define DB_EEPROM_CHKSUM 0x1f
#define DB_EEPROM_CLEN 0x20 // length of common portion of eeprom
#define DB_EEPROM_CUSTOM_BASE DB_EEPROM_CLEN // first avail offset for
// daughterboard specific use
////////////////////////////////////////////////////////////////////////
//negative sum of bytes excluding checksum byte
static uint8_t checksum(const byte_vector_t &bytes){
int sum = 0;
for (size_t i = 0; i < std::min(bytes.size(), size_t(DB_EEPROM_CHKSUM)); i++){
sum -= int(bytes.at(i));
}
UHD_LOG_DEBUG("DB_EEPROM", boost::format("byte sum: 0x%02x") % sum)
return uint8_t(sum);
}
dboard_eeprom_t::dboard_eeprom_t(void){
id = dboard_id_t::none();
serial = "";
}
void dboard_eeprom_t::load(i2c_iface &iface, uint8_t addr){
byte_vector_t bytes = iface.read_eeprom(addr, 0, DB_EEPROM_CLEN);
std::ostringstream ss;
for (size_t i = 0; i < bytes.size(); i++){
UHD_LOG_TRACE("DB_EEPROM",boost::format("eeprom byte[0x%02x] = 0x%02x") % i % int(bytes.at(i)))
}
try{
UHD_ASSERT_THROW(bytes.size() >= DB_EEPROM_CLEN);
UHD_ASSERT_THROW(bytes[DB_EEPROM_MAGIC] == DB_EEPROM_MAGIC_VALUE);
UHD_ASSERT_THROW(bytes[DB_EEPROM_CHKSUM] == checksum(bytes));
//parse the ids
id = dboard_id_t::from_uint16(0
| (uint16_t(bytes[DB_EEPROM_ID_LSB]) << 0)
| (uint16_t(bytes[DB_EEPROM_ID_MSB]) << 8)
);
//parse the serial
serial = bytes_to_string(
byte_vector_t(&bytes.at(DB_EEPROM_SERIAL),
&bytes.at(DB_EEPROM_SERIAL+DB_EEPROM_SERIAL_LEN))
);
//parse the revision
const uint16_t rev_num = 0
| (uint16_t(bytes[DB_EEPROM_REV_LSB]) << 0)
| (uint16_t(bytes[DB_EEPROM_REV_MSB]) << 8)
;
if (rev_num != 0 and rev_num != 0xffff){
revision = std::to_string(rev_num);
}
}catch(const uhd::assertion_error &){
id = dboard_id_t::none();
serial = "";
}
}
void dboard_eeprom_t::store(i2c_iface &iface, uint8_t addr) const{
byte_vector_t bytes(DB_EEPROM_CLEN, 0); //defaults to all zeros
bytes[DB_EEPROM_MAGIC] = DB_EEPROM_MAGIC_VALUE;
//load the id bytes
bytes[DB_EEPROM_ID_LSB] = uint8_t(id.to_uint16() >> 0);
bytes[DB_EEPROM_ID_MSB] = uint8_t(id.to_uint16() >> 8);
//load the serial bytes
byte_vector_t ser_bytes = string_to_bytes(serial, DB_EEPROM_SERIAL_LEN);
std::copy(ser_bytes.begin(), ser_bytes.end(), &bytes.at(DB_EEPROM_SERIAL));
//load the revision bytes
if (not revision.empty()){
const uint16_t rev_num = boost::lexical_cast<uint16_t>(revision);
bytes[DB_EEPROM_REV_LSB] = uint8_t(rev_num >> 0);
bytes[DB_EEPROM_REV_MSB] = uint8_t(rev_num >> 8);
}
//load the checksum
bytes[DB_EEPROM_CHKSUM] = checksum(bytes);
iface.write_eeprom(addr, 0, bytes);
}
|
