wpilibc/Athena/src/Talon.cpp

/*----------------------------------------------------------------------------*/
/* Copyright (c) FIRST 2008. All Rights Reserved.
 */
/* Open Source Software - may be modified and shared by FRC teams. The code   */
/* must be accompanied by the FIRST BSD license file in $(WIND_BASE)/WPILib.  */
/*----------------------------------------------------------------------------*/

#include "Talon.h"

#include "LiveWindow/LiveWindow.h"

/**
 * Constructor for a Talon (original or Talon SR)
 * @param channel The PWM channel number that the Talon is attached to. 0-9 are
 * on-board, 10-19 are on the MXP port
 */
Talon::Talon(uint32_t channel) : SafePWM(channel) {
  /* Note that the Talon uses the following bounds for PWM values. These values
   * should work reasonably well for most controllers, but if users experience
   * issues such as asymmetric behavior around the deadband or inability to
   * saturate the controller in either direction, calibration is recommended.
   * The calibration procedure can be found in the Talon User Manual available
   * from CTRE.
   *
   *   2.037ms = full "forward"
   *   1.539ms = the "high end" of the deadband range
   *   1.513ms = center of the deadband range (off)
   *   1.487ms = the "low end" of the deadband range
   *   0.989ms = full "reverse"
   */
  SetBounds(2.037, 1.539, 1.513, 1.487, .989);
  SetPeriodMultiplier(kPeriodMultiplier_1X);
  SetRaw(m_centerPwm);
  SetZeroLatch();

  HALReport(HALUsageReporting::kResourceType_Talon, GetChannel());
  LiveWindow::GetInstance()->AddActuator("Talon", GetChannel(), this);
}

/**
 * Set the PWM value.
 *
 * The PWM value is set using a range of -1.0 to 1.0, appropriately
 * scaling the value for the FPGA.
 *
 * @param speed The speed value between -1.0 and 1.0 to set.
 * @param syncGroup Unused interface.
 */
void Talon::Set(float speed, uint8_t syncGroup) {
  SetSpeed(m_isInverted ? -speed : speed);
}

/**
 * Get the recently set value of the PWM.
 *
 * @return The most recently set value for the PWM between -1.0 and 1.0.
 */
float Talon::Get() const { return GetSpeed(); }

/**
 * Common interface for disabling a motor.
 */
void Talon::Disable() { SetRaw(kPwmDisabled); }

/**
* common interface for inverting direction of a speed controller
* @param isInverted The state of inversion true is inverted
*/
void Talon::SetInverted(bool isInverted) { m_isInverted = isInverted; }

/**
 * Common interface for the inverting direction of a speed controller.
 *
 * @return isInverted The state of inversion, true is inverted.
 *
 */
bool Talon::GetInverted() const { return m_isInverted; }

/**
 * Write out the PID value as seen in the PIDOutput base object.
 *
 * @param output Write out the PWM value as was found in the PIDController
 */
void Talon::PIDWrite(float output) { Set(output); }