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//
// 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/exception.hpp>
#include <uhd/types/byte_vector.hpp>
#include <uhd/usrp/dboard_eeprom.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));
}
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;
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);
}
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