mboard_eeprom_t usrp1_impl::get_mb_eeprom(uhd::i2c_iface::sptr iface)
{
mboard_eeprom_t mb_eeprom;
//extract the serial
mb_eeprom["serial"] = uhd::bytes_to_string(iface->read_eeprom(
USRP1_EEPROM_ADDR, offsetof(usrp1_eeprom_map, serial), USRP1_SERIAL_LEN
));
//extract the name
mb_eeprom["name"] = uhd::bytes_to_string(iface->read_eeprom(
USRP1_EEPROM_ADDR, offsetof(usrp1_eeprom_map, name), NAME_MAX_LEN
));
//extract master clock rate as a 32-bit uint in Hz
uint32_t master_clock_rate;
const byte_vector_t rate_bytes = iface->read_eeprom(
USRP1_EEPROM_ADDR, offsetof(usrp1_eeprom_map, mcr), sizeof(master_clock_rate)
);
std::copy(
rate_bytes.begin(), rate_bytes.end(), //input
reinterpret_cast<uint8_t *>(&master_clock_rate) //output
);
master_clock_rate = ntohl(master_clock_rate);
if (master_clock_rate > 1e6 and master_clock_rate < 1e9){
mb_eeprom["mcr"] = std::to_string(master_clock_rate);
}
else mb_eeprom["mcr"] = "";
return mb_eeprom;
}
static void load_b000(mboard_eeprom_t &mb_eeprom, i2c_iface &iface){
//extract the serial
mb_eeprom["serial"] = bytes_to_string(iface.read_eeprom(
B000_EEPROM_ADDR, offsetof(b000_eeprom_map, serial), B000_SERIAL_LEN
));
//extract the name
mb_eeprom["name"] = bytes_to_string(iface.read_eeprom(
B000_EEPROM_ADDR, offsetof(b000_eeprom_map, name), NAME_MAX_LEN
));
//extract master clock rate as a 32-bit uint in Hz
boost::uint32_t master_clock_rate;
const byte_vector_t rate_bytes = iface.read_eeprom(
B000_EEPROM_ADDR, offsetof(b000_eeprom_map, mcr), sizeof(master_clock_rate)
);
std::copy(
rate_bytes.begin(), rate_bytes.end(), //input
reinterpret_cast<boost::uint8_t *>(&master_clock_rate) //output
);
master_clock_rate = ntohl(master_clock_rate);
if (master_clock_rate > 1e6 and master_clock_rate < 1e9){
mb_eeprom["mcr"] = boost::lexical_cast<std::string>(master_clock_rate);
}
else mb_eeprom["mcr"] = "";
}
//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_TRACE("DB_EEPROM", boost::format("byte sum: 0x%02x") % sum)
return uint8_t(sum);
}
//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));
}
UHD_LOGV(often) << boost::format("sum: 0x%02x") % sum << std::endl;
return boost::uint8_t(sum);
}
void write_i2c(boost::uint8_t addr, const byte_vector_t &bytes){
//allocate some memory for this transaction
UHD_ASSERT_THROW(bytes.size() <= max_i2c_data_bytes);
boost::uint8_t mem[sizeof(usrp_e_i2c) + max_i2c_data_bytes];
//load the data struct
usrp_e_i2c *data = reinterpret_cast<usrp_e_i2c*>(mem);
data->addr = addr;
data->len = bytes.size();
std::copy(bytes.begin(), bytes.end(), data->data);
//call the spi ioctl
this->ioctl(USRP_E_I2C_WRITE, data);
}
void write_i2c(boost::uint8_t addr, const byte_vector_t &bytes){
byte_vector_t rw_bytes(bytes);
//setup the message
i2c_msg msg;
msg.addr = addr;
msg.flags = 0;
msg.len = bytes.size();
msg.buf = &rw_bytes.front();
//setup the data
i2c_rdwr_ioctl_data data;
data.msgs = &msg;
data.nmsgs = 1;
//call the ioctl
UHD_ASSERT_THROW(::ioctl(_node_fd, I2C_RDWR, &data) >= 0);
}
//! convert a byte vector read from eeprom to a string
static std::string uint16_bytes_to_string(const byte_vector_t &bytes){
const boost::uint16_t num = (boost::uint16_t(bytes.at(0)) << 0) | (boost::uint16_t(bytes.at(1)) << 8);
return (num == 0 or num == 0xffff)? "" : boost::lexical_cast<std::string>(num);
}
