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876d4150aa
Note: template_lvbitx.{cpp,hpp} need to be excluded from the list of
files that clang-format gets applied against.
127 lines
4.2 KiB
C++
127 lines
4.2 KiB
C++
//
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// Copyright 2010-2011,2015 Ettus Research LLC
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// Copyright 2018 Ettus Research, a National Instruments Company
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//
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// SPDX-License-Identifier: GPL-3.0-or-later
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//
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#include <uhd/exception.hpp>
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#include <uhd/types/byte_vector.hpp>
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#include <uhd/usrp/dboard_eeprom.hpp>
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#include <uhd/utils/log.hpp>
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#include <boost/format.hpp>
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#include <boost/lexical_cast.hpp>
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#include <algorithm>
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#include <sstream>
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using namespace uhd;
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using namespace uhd::usrp;
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////////////////////////////////////////////////////////////////////////
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// format of daughterboard EEPROM
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// 00: 0xDB code for ``I'm a daughterboard''
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// 01: .. Daughterboard ID (LSB)
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// 02: .. Daughterboard ID (MSB)
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// 03: .. io bits 7-0 direction (bit set if it's an output from m'board)
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// 04: .. io bits 15-8 direction (bit set if it's an output from m'board)
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// 05: .. ADC0 DC offset correction (LSB)
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// 06: .. ADC0 DC offset correction (MSB)
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// 07: .. ADC1 DC offset correction (LSB)
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// 08: .. ADC1 DC offset correction (MSB)
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// ...
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// 1f: .. negative of the sum of bytes [0x00, 0x1e]
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#define DB_EEPROM_MAGIC 0x00
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#define DB_EEPROM_MAGIC_VALUE 0xDB
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#define DB_EEPROM_ID_LSB 0x01
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#define DB_EEPROM_ID_MSB 0x02
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#define DB_EEPROM_REV_LSB 0x03
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#define DB_EEPROM_REV_MSB 0x04
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#define DB_EEPROM_OFFSET_0_LSB 0x05 // offset correction for ADC or DAC 0
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#define DB_EEPROM_OFFSET_0_MSB 0x06
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#define DB_EEPROM_OFFSET_1_LSB 0x07 // offset correction for ADC or DAC 1
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#define DB_EEPROM_OFFSET_1_MSB 0x08
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#define DB_EEPROM_SERIAL 0x09
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#define DB_EEPROM_SERIAL_LEN 0x09 // 9 ASCII characters
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#define DB_EEPROM_CHKSUM 0x1f
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#define DB_EEPROM_CLEN 0x20 // length of common portion of eeprom
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#define DB_EEPROM_CUSTOM_BASE \
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DB_EEPROM_CLEN // first avail offset for
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// daughterboard specific use
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////////////////////////////////////////////////////////////////////////
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// negative sum of bytes excluding checksum byte
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static uint8_t checksum(const byte_vector_t& bytes)
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{
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int sum = 0;
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for (size_t i = 0; i < std::min(bytes.size(), size_t(DB_EEPROM_CHKSUM)); i++) {
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sum -= int(bytes.at(i));
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}
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return uint8_t(sum);
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}
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dboard_eeprom_t::dboard_eeprom_t(void)
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{
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id = dboard_id_t::none();
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serial = "";
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}
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void dboard_eeprom_t::load(i2c_iface& iface, uint8_t addr)
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{
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byte_vector_t bytes = iface.read_eeprom(addr, 0, DB_EEPROM_CLEN);
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std::ostringstream ss;
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try {
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UHD_ASSERT_THROW(bytes.size() >= DB_EEPROM_CLEN);
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UHD_ASSERT_THROW(bytes[DB_EEPROM_MAGIC] == DB_EEPROM_MAGIC_VALUE);
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UHD_ASSERT_THROW(bytes[DB_EEPROM_CHKSUM] == checksum(bytes));
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// parse the ids
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id = dboard_id_t::from_uint16(0 | (uint16_t(bytes[DB_EEPROM_ID_LSB]) << 0)
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| (uint16_t(bytes[DB_EEPROM_ID_MSB]) << 8));
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// parse the serial
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serial = bytes_to_string(byte_vector_t(&bytes.at(DB_EEPROM_SERIAL),
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&bytes.at(DB_EEPROM_SERIAL + DB_EEPROM_SERIAL_LEN)));
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// parse the revision
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const uint16_t rev_num = 0 | (uint16_t(bytes[DB_EEPROM_REV_LSB]) << 0)
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| (uint16_t(bytes[DB_EEPROM_REV_MSB]) << 8);
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if (rev_num != 0 and rev_num != 0xffff) {
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revision = std::to_string(rev_num);
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}
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} catch (const uhd::assertion_error&) {
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id = dboard_id_t::none();
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serial = "";
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}
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}
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void dboard_eeprom_t::store(i2c_iface& iface, uint8_t addr) const
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{
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byte_vector_t bytes(DB_EEPROM_CLEN, 0); // defaults to all zeros
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bytes[DB_EEPROM_MAGIC] = DB_EEPROM_MAGIC_VALUE;
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// load the id bytes
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bytes[DB_EEPROM_ID_LSB] = uint8_t(id.to_uint16() >> 0);
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bytes[DB_EEPROM_ID_MSB] = uint8_t(id.to_uint16() >> 8);
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// load the serial bytes
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byte_vector_t ser_bytes = string_to_bytes(serial, DB_EEPROM_SERIAL_LEN);
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std::copy(ser_bytes.begin(), ser_bytes.end(), &bytes.at(DB_EEPROM_SERIAL));
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// load the revision bytes
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if (not revision.empty()) {
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const uint16_t rev_num = boost::lexical_cast<uint16_t>(revision);
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bytes[DB_EEPROM_REV_LSB] = uint8_t(rev_num >> 0);
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bytes[DB_EEPROM_REV_MSB] = uint8_t(rev_num >> 8);
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}
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// load the checksum
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bytes[DB_EEPROM_CHKSUM] = checksum(bytes);
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iface.write_eeprom(addr, 0, bytes);
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}
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