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
|
//
// Copyright 2010-2011 Ettus Research LLC
//
// This program 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 version 3 of the License, or
// (at your option) any later version.
//
// 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. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
#include <uhd/usrp/dboard_eeprom.hpp>
#include <uhd/utils/assert.hpp>
#include <boost/format.hpp>
#include <algorithm>
#include <iostream>
using namespace uhd;
using namespace uhd::usrp;
static const bool _dboard_eeprom_debug = false;
/***********************************************************************
* Utility functions
**********************************************************************/
//! create a string from a byte vector, return empty if invalid ascii
static const std::string bytes_to_string(const byte_vector_t &bytes){
std::string out;
BOOST_FOREACH(boost::uint8_t byte, bytes){
if (byte < 32 or byte > 127) return out;
out += byte;
}
return out;
}
//! create a byte vector from a string, null terminate unless max length
static const byte_vector_t string_to_bytes(const std::string &string, size_t max_length){
byte_vector_t bytes;
for (size_t i = 0; i < std::min(string.size(), max_length); i++){
bytes.push_back(string[i]);
}
if (bytes.size() < max_length - 1) bytes.push_back('\0');
return bytes;
}
////////////////////////////////////////////////////////////////////////
// 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_OE_LSB 0x03
#define DB_EEPROM_OE_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 boost::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));
}
if (_dboard_eeprom_debug)
std::cout << boost::format("sum: 0x%02x") % sum << std::endl;
return boost::uint8_t(sum);
}
dboard_eeprom_t::dboard_eeprom_t(void){
id = dboard_id_t::none();
serial = "";
}
void dboard_eeprom_t::load(i2c_iface &iface, boost::uint8_t addr){
byte_vector_t bytes = iface.read_eeprom(addr, 0, DB_EEPROM_CLEN);
if (_dboard_eeprom_debug){
for (size_t i = 0; i < bytes.size(); i++){
std::cout << boost::format(
"eeprom byte[0x%02x] = 0x%02x") % i % int(bytes.at(i)
) << std::endl;
}
}
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
| (boost::uint16_t(bytes[DB_EEPROM_ID_LSB]) << 0)
| (boost::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))
);
}catch(const uhd::assertion_error &){
id = dboard_id_t::none();
serial = "";
}
}
void dboard_eeprom_t::store(i2c_iface &iface, boost::uint8_t addr){
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] = boost::uint8_t(id.to_uint16() >> 0);
bytes[DB_EEPROM_ID_MSB] = boost::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 checksum
bytes[DB_EEPROM_CHKSUM] = checksum(bytes);
iface.write_eeprom(addr, 0, bytes);
}
|
