wpilibc/src/main/native/cpp/DigitalOutput.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/DigitalOutput.h"

#include <limits>

#include <hal/DIO.h>
#include <hal/FRCUsageReporting.h>
#include <hal/HALBase.h>
#include <hal/Ports.h>
#include <wpi/StackTrace.h>
#include <wpi/sendable/SendableBuilder.h>
#include <wpi/sendable/SendableRegistry.h>

#include "frc/Errors.h"
#include "frc/SensorUtil.h"

using namespace frc;

DigitalOutput::DigitalOutput(int channel) {
  m_pwmGenerator = HAL_kInvalidHandle;
  if (!SensorUtil::CheckDigitalChannel(channel)) {
    throw FRC_MakeError(err::ChannelIndexOutOfRange, "Channel {}", channel);
  }
  m_channel = channel;

  int32_t status = 0;
  std::string stackTrace = wpi::GetStackTrace(1);
  m_handle = HAL_InitializeDIOPort(HAL_GetPort(channel), false,
                                   stackTrace.c_str(), &status);
  FRC_CheckErrorStatus(status, "Channel {}", channel);

  HAL_Report(HALUsageReporting::kResourceType_DigitalOutput, channel + 1);
  wpi::SendableRegistry::AddLW(this, "DigitalOutput", channel);
}

DigitalOutput::~DigitalOutput() {
  // Disable the PWM in case it was running.
  try {
    DisablePWM();
  } catch (const RuntimeError& e) {
    e.Report();
  }

  HAL_FreeDIOPort(m_handle);
}

void DigitalOutput::Set(bool value) {
  int32_t status = 0;
  HAL_SetDIO(m_handle, value, &status);
  FRC_CheckErrorStatus(status, "Channel {}", m_channel);
}

bool DigitalOutput::Get() const {
  int32_t status = 0;
  bool val = HAL_GetDIO(m_handle, &status);
  FRC_CheckErrorStatus(status, "Channel {}", m_channel);
  return val;
}

HAL_Handle DigitalOutput::GetPortHandleForRouting() const {
  return m_handle;
}

AnalogTriggerType DigitalOutput::GetAnalogTriggerTypeForRouting() const {
  return static_cast<AnalogTriggerType>(0);
}

bool DigitalOutput::IsAnalogTrigger() const {
  return false;
}

int DigitalOutput::GetChannel() const {
  return m_channel;
}

void DigitalOutput::Pulse(double length) {
  int32_t status = 0;
  HAL_Pulse(m_handle, length, &status);
  FRC_CheckErrorStatus(status, "Channel {}", m_channel);
}

bool DigitalOutput::IsPulsing() const {
  int32_t status = 0;
  bool value = HAL_IsPulsing(m_handle, &status);
  FRC_CheckErrorStatus(status, "Channel {}", m_channel);
  return value;
}

void DigitalOutput::SetPWMRate(double rate) {
  int32_t status = 0;
  HAL_SetDigitalPWMRate(rate, &status);
  FRC_CheckErrorStatus(status, "Channel {}", m_channel);
}

void DigitalOutput::EnablePWM(double initialDutyCycle) {
  if (m_pwmGenerator != HAL_kInvalidHandle) {
    return;
  }

  int32_t status = 0;

  m_pwmGenerator = HAL_AllocateDigitalPWM(&status);
  FRC_CheckErrorStatus(status, "Channel {}", m_channel);

  HAL_SetDigitalPWMDutyCycle(m_pwmGenerator, initialDutyCycle, &status);
  FRC_CheckErrorStatus(status, "Channel {}", m_channel);

  HAL_SetDigitalPWMOutputChannel(m_pwmGenerator, m_channel, &status);
  FRC_CheckErrorStatus(status, "Channel {}", m_channel);
}

void DigitalOutput::DisablePWM() {
  if (m_pwmGenerator == HAL_kInvalidHandle) {
    return;
  }

  int32_t status = 0;

  // Disable the output by routing to a dead bit.
  HAL_SetDigitalPWMOutputChannel(m_pwmGenerator, SensorUtil::kDigitalChannels,
                                 &status);
  FRC_CheckErrorStatus(status, "Channel {}", m_channel);

  HAL_FreeDigitalPWM(m_pwmGenerator, &status);
  FRC_CheckErrorStatus(status, "Channel {}", m_channel);

  m_pwmGenerator = HAL_kInvalidHandle;
}

void DigitalOutput::UpdateDutyCycle(double dutyCycle) {
  int32_t status = 0;
  HAL_SetDigitalPWMDutyCycle(m_pwmGenerator, dutyCycle, &status);
  FRC_CheckErrorStatus(status, "Channel {}", m_channel);
}

void DigitalOutput::SetSimDevice(HAL_SimDeviceHandle device) {
  HAL_SetDIOSimDevice(m_handle, device);
}

void DigitalOutput::InitSendable(wpi::SendableBuilder& builder) {
  builder.SetSmartDashboardType("Digital Output");
  builder.AddBooleanProperty(
      "Value", [=] { return Get(); }, [=](bool value) { Set(value); });
}