os32c.cpp

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#include <ros/ros.h>
#include <boost/shared_ptr.hpp>
#include <boost/make_shared.hpp>
#include <boost/asio.hpp>

#include "omron_os32c_driver/os32c.h"
#include "odva_ethernetip/serialization/serializable_buffer.h"
#include "odva_ethernetip/cpf_packet.h"
#include "odva_ethernetip/cpf_item.h"
#include "odva_ethernetip/sequenced_address_item.h"
#include "odva_ethernetip/sequenced_data_item.h"

using std::cout;
using std::endl;
using boost::shared_ptr;
using boost::make_shared;
using boost::asio::buffer;
using eip::Session;
using eip::serialization::SerializableBuffer;
using eip::RRDataResponse;
using eip::CPFItem;
using eip::CPFPacket;
using eip::SequencedAddressItem;
using eip::SequencedDataItem;
using omron_os32c_driver::RangeAndReflectanceMeasurement;

namespace omron_os32c_driver {

const double OS32C::ANGLE_MIN = DEG2RAD(-135.2);
const double OS32C::ANGLE_MAX = DEG2RAD( 135.2);
const double OS32C::ANGLE_INC = DEG2RAD(0.4);
const double OS32C::DISTANCE_MIN = 0.002;
const double OS32C::DISTANCE_MAX = 50;

EIP_UINT OS32C::getRangeFormat()
{
  mrc_.range_report_format = getSingleAttribute(0x73, 1, 4, (EIP_UINT)0);
  return mrc_.range_report_format;
}

void OS32C::setRangeFormat(EIP_UINT format)
{
  setSingleAttribute(0x73, 1, 4, format);
  mrc_.range_report_format = format;
}

EIP_UINT OS32C::getReflectivityFormat()
{
  mrc_.reflectivity_report_format = getSingleAttribute(0x73, 1, 5, (EIP_UINT)0);
  return mrc_.reflectivity_report_format;
}

void OS32C::setReflectivityFormat(EIP_UINT format)
{
  setSingleAttribute(0x73, 1, 5, format);
  mrc_.reflectivity_report_format = format;
}

void OS32C::calcBeamMask(double start_angle, double end_angle, EIP_BYTE mask[])
{
  if (start_angle > (ANGLE_MAX + ANGLE_INC / 2))
  {
    throw std::invalid_argument("Start angle is greater than max");
  }
  if (end_angle < (ANGLE_MIN - ANGLE_INC / 2))
  {
    throw std::invalid_argument("End angle is greater than max");
  }
  if (start_angle - end_angle <= ANGLE_INC)
  {
    throw std::invalid_argument("Starting angle is less than ending angle");
  }

  int start_beam = calcBeamNumber(start_angle);
  int end_beam = calcBeamNumber(end_angle);
  start_angle_ = calcBeamCentre(start_beam);
  end_angle_ = calcBeamCentre(end_beam);

  // figure out where we're starting and ending in the array
  int start_byte = start_beam / 8;
  int start_bit = start_beam - start_byte * 8;
  int end_byte = end_beam / 8;
  int end_bit = end_beam - end_byte * 8;

  // clear out all of the whole bytes that need to be set in one shot
  if (start_byte > 0)
  {
    memset(mask, 0, start_byte);
  }

  // if we're starting in the middle of the byte, then we need to do some bit math
  if (start_bit)
  {
    // clear out the bits at the start of the byte, while making the higher bits 1
    mask[start_byte] = ~((1 << start_bit) - 1);
  }
  else
  {
    --start_byte;
  }

  // mark all of the whole bytes
  memset(mask + start_byte + 1, 0xFF, end_byte - start_byte - 1);

  // clear out the bits above the end beam
  mask[end_byte] = (1 << (end_bit + 1)) - 1;

  // zero out everything after the end
  memset(mask + end_byte + 1, 0, 87 - end_byte);
}

void OS32C::selectBeams(double start_angle, double end_angle)
{
  calcBeamMask(start_angle, end_angle, mrc_.beam_selection_mask);
  shared_ptr<SerializableBuffer> sb = make_shared<SerializableBuffer>(
    buffer(mrc_.beam_selection_mask));
  setSingleAttributeSerializable(0x73, 1, 12, sb);
}

RangeAndReflectanceMeasurement OS32C::getSingleRRScan()
{
  RangeAndReflectanceMeasurement rr;
  getSingleAttributeSerializable(0x75, 1, 3, rr);
  return rr;
}

void OS32C::fillLaserScanStaticConfig(sensor_msgs::LaserScan* ls)
{
  ls->angle_max = start_angle_;
  ls->angle_min = end_angle_;
  ls->angle_increment = ANGLE_INC;
  ls->range_min = DISTANCE_MIN;
  ls->range_max = DISTANCE_MAX;
}

void OS32C::convertToLaserScan(const RangeAndReflectanceMeasurement& rr, sensor_msgs::LaserScan* ls)
{
  if (rr.range_data.size() != rr.header.num_beams ||
    rr.reflectance_data.size() != rr.header.num_beams)
  {
    throw std::invalid_argument("Number of beams does not match vector size");
  }

  // Beam period is in ns
  ls->time_increment = rr.header.scan_beam_period / 1000000000.0;
  // Scan period is in microseconds.
  ls->scan_time = rr.header.scan_rate / 1000000.0;

  // TODO: this currently makes assumptions of the report format. Should likely
  // accomodate all of them, or at least anything reasonable.
  ls->ranges.resize(rr.header.num_beams);
  ls->intensities.resize(rr.header.num_beams);
  for (int i = 0; i < rr.header.num_beams; ++i)
  {
    if (rr.range_data[i] == 0x0001)
    {
      // noisy beam detected
      ls->ranges[i] = 0;
    }
    else if (rr.range_data[i] == 0xFFFF)
    {
      // no return
      ls->ranges[i] = DISTANCE_MAX;
    }
    else
    {
      ls->ranges[i] = rr.range_data[i] / 1000.0;
    }
    ls->intensities[i] = rr.reflectance_data[i];
  }
}

void OS32C::convertToLaserScan(const MeasurementReport& mr, sensor_msgs::LaserScan* ls)
{
  if (mr.measurement_data.size() != mr.header.num_beams)
  {
    throw std::invalid_argument("Number of beams does not match vector size");
  }

  // Beam period is in ns.
  ls->time_increment = mr.header.scan_beam_period / 1000000000.0;
  // Scan period is in microseconds.
  ls->scan_time = mr.header.scan_rate / 1000000.0;

  // TODO: this currently makes assumptions of the report format. Should likely
  // accomodate all of them, or at least anything reasonable.
  ls->ranges.resize(mr.header.num_beams);
  for (int i = 0; i < mr.header.num_beams; ++i)
  {
    if (mr.measurement_data[i] == 0x0001)
    {
      // noisy beam detected
      ls->ranges[i] = 0;
    }
    else if (mr.measurement_data[i] == 0xFFFF)
    {
      // no return
      ls->ranges[i] = DISTANCE_MAX;
    }
    else
    {
      ls->ranges[i] = mr.measurement_data[i] / 1000.0;
    }
  }
}

void OS32C::sendMeasurmentReportConfigUDP()
{
  // TODO: check that connection is valid
  CPFPacket pkt;
  shared_ptr<SequencedAddressItem> address =
    make_shared<SequencedAddressItem>(
      getConnection(connection_num_).o_to_t_connection_id, mrc_sequence_num_++);
  shared_ptr<MeasurementReportConfig> data = make_shared<MeasurementReportConfig>();
  *data = mrc_;
  pkt.getItems().push_back(CPFItem(0x8002, address));
  pkt.getItems().push_back(CPFItem(0x00B1, data));
  sendIOPacket(pkt);
}

MeasurementReport OS32C::receiveMeasurementReportUDP()
{
  CPFPacket pkt = receiveIOPacket();
  if (pkt.getItemCount() != 2)
  {
    throw std::logic_error("IO Packet received with wrong number of items");
  }
  if (pkt.getItems()[1].getItemType() != 0x00B1)
  {
    throw std::logic_error("IO Packet received with wrong data type");
  }

  SequencedDataItem<MeasurementReport> data;
  pkt.getItems()[1].getDataAs(data);
  return data;
}

void OS32C::startUDPIO()
{
  EIP_CONNECTION_INFO_T o_to_t, t_to_o;
  o_to_t.assembly_id = 0x71;
  o_to_t.buffer_size = 0x006E;
  o_to_t.rpi = 0x00177FA0;
  t_to_o.assembly_id = 0x66;
  t_to_o.buffer_size = 0x0584;
  t_to_o.rpi = 0x00013070;

  connection_num_ = createConnection(o_to_t, t_to_o);
}

} // namespace os32c