#----------------------------------------------------------------------------
# Copyright (c) FIRST 2008-2012. 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 the root directory of
# the project.
#----------------------------------------------------------------------------
import hal
from .livewindow import LiveWindow
from .safepwm import SafePWM
__all__ = ["VictorSP"]
[docs]class VictorSP(SafePWM):
"""
VEX Robotics Victor SP Speed Controller via PWM
.. not_implemented: initVictorSP
"""
def __init__(self, channel):
"""Constructor.
:param channel: The PWM channel that the VictorSP is attached to. 0-9 are on-board, 10-19 are on the MXP port.
:type channel: int
.. note ::
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 VictorSP User Manual.
- 2.004ms = full "forward"
- 1.520ms = the "high end" of the deadband range
- 1.500ms = center of the deadband range (off)
- 1.480ms = the "low end" of the deadband range
- 0.997ms = full "reverse"
"""
super().__init__(channel)
self.setBounds(2.004, 1.52, 1.50, 1.48, .997)
self.setPeriodMultiplier(self.PeriodMultiplier.k1X)
self.setRaw(self.centerPwm)
self.setZeroLatch()
LiveWindow.addActuatorChannel("VictorSP", self.getChannel(), self)
hal.HALReport(hal.HALUsageReporting.kResourceType_VictorSP,
self.getChannel())
[docs] def set(self, speed, syncGroup=0):
"""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 to set. Value should be between -1.0 and 1.0.
:type speed: float
:param syncGroup: The update group to add this set() to, pending
updateSyncGroup(). If 0, update immediately.
"""
self.setSpeed(speed)
self.feed()
[docs] def get(self):
"""Get the recently set value of the PWM.
:returns: The most recently set value for the PWM between -1.0 and 1.0.
:rtype: float
"""
return self.getSpeed()
[docs] def pidWrite(self, output):
"""Write out the PID value as seen in the PIDOutput base object.
:param output: Write out the PWM value as was found in the
:class:`PIDController`.
:type output: float
"""
self.set(output)