allwpilib/wpilibc/src/main/native/cpp/ADXL345_I2C.cpp

// Copyright (c) FIRST and other WPILib contributors.
// Open Source Software; you can modify and/or share it under the terms of
// the WPILib BSD license file in the root directory of this project.

#include "frc/ADXL345_I2C.h"

#include <hal/FRCUsageReporting.h>
#include <networktables/NTSendableBuilder.h>
#include <wpi/sendable/SendableRegistry.h>

using namespace frc;

ADXL345_I2C::ADXL345_I2C(I2C::Port port, Range range, int deviceAddress)
    : m_i2c(port, deviceAddress),
      m_simDevice("Accel:ADXL345_I2C", port, deviceAddress) {
  if (m_simDevice) {
    m_simRange = m_simDevice.CreateEnumDouble("range", hal::SimDevice::kOutput,
                                              {"2G", "4G", "8G", "16G"},
                                              {2.0, 4.0, 8.0, 16.0}, 0);
    m_simX = m_simDevice.CreateDouble("x", hal::SimDevice::kInput, 0.0);
    m_simY = m_simDevice.CreateDouble("y", hal::SimDevice::kInput, 0.0);
    m_simZ = m_simDevice.CreateDouble("z", hal::SimDevice::kInput, 0.0);
  }
  // Turn on the measurements
  m_i2c.Write(kPowerCtlRegister, kPowerCtl_Measure);
  // Specify the data format to read
  SetRange(range);

  HAL_Report(HALUsageReporting::kResourceType_ADXL345,
             HALUsageReporting::kADXL345_I2C, 0);

  wpi::SendableRegistry::GetInstance().AddLW(this, "ADXL345_I2C", port);
}

void ADXL345_I2C::SetRange(Range range) {
  m_i2c.Write(kDataFormatRegister,
              kDataFormat_FullRes | static_cast<uint8_t>(range));
}

double ADXL345_I2C::GetX() {
  return GetAcceleration(kAxis_X);
}

double ADXL345_I2C::GetY() {
  return GetAcceleration(kAxis_Y);
}

double ADXL345_I2C::GetZ() {
  return GetAcceleration(kAxis_Z);
}

double ADXL345_I2C::GetAcceleration(ADXL345_I2C::Axes axis) {
  if (axis == kAxis_X && m_simX) {
    return m_simX.Get();
  }
  if (axis == kAxis_Y && m_simY) {
    return m_simY.Get();
  }
  if (axis == kAxis_Z && m_simZ) {
    return m_simZ.Get();
  }
  int16_t rawAccel = 0;
  m_i2c.Read(kDataRegister + static_cast<int>(axis), sizeof(rawAccel),
             reinterpret_cast<uint8_t*>(&rawAccel));
  return rawAccel * kGsPerLSB;
}

ADXL345_I2C::AllAxes ADXL345_I2C::GetAccelerations() {
  AllAxes data;
  if (m_simX && m_simY && m_simZ) {
    data.XAxis = m_simX.Get();
    data.YAxis = m_simY.Get();
    data.ZAxis = m_simZ.Get();
    return data;
  }
  int16_t rawData[3];
  m_i2c.Read(kDataRegister, sizeof(rawData),
             reinterpret_cast<uint8_t*>(rawData));

  data.XAxis = rawData[0] * kGsPerLSB;
  data.YAxis = rawData[1] * kGsPerLSB;
  data.ZAxis = rawData[2] * kGsPerLSB;
  return data;
}

void ADXL345_I2C::InitSendable(nt::NTSendableBuilder& builder) {
  builder.SetSmartDashboardType("3AxisAccelerometer");
  auto x = builder.GetEntry("X").GetHandle();
  auto y = builder.GetEntry("Y").GetHandle();
  auto z = builder.GetEntry("Z").GetHandle();
  builder.SetUpdateTable([=] {
    auto data = GetAccelerations();
    nt::NetworkTableEntry(x).SetDouble(data.XAxis);
    nt::NetworkTableEntry(y).SetDouble(data.YAxis);
    nt::NetworkTableEntry(z).SetDouble(data.ZAxis);
  });
}