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e017f93f16
Also added some references/smart pointers to a couple places that seemed convenient to the user. I haven't updated the constructors for RobotDrive() related examples, pending the results of gerrit change https://usfirst.collab.net/gerrit/#/c/960/ A few things that we are noticing: --It might be nice if ReturnPIDInput() didn't have to be const; when people try to override it, they have to remember to put the const in and if they don't, then the compiler error isn't the most obvious (especially since this is a change). This would also apply to PIDGet() in the PIDSource interface. --SendableChooser still takes raw pointers. This could lead to an issue I had to debug briefly where you accidentally call GetSelected() on autoChooser and put the resulting raw pointer into a unique_ptr, which destroys the pointer when it goes out of scope. Specifically, I was testing the PacGoat example and I ended up with a situation where if auto mode was run once, it was fine, but if it was run twice, the selected command would have been destroyed by the unique_ptr. I believe that this just requires updating SendableChosser to take shared_ptr. --When the samples are compiled with -pedantic, it points out that START_ROBOT_CLASS macro expansion results in a redundant semicolon. Change-Id: Ib4c025a61263d0d2780d4253faa31713e15333a5
48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
#include "WPILib.h"
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/**
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* This is a sample program showing how to retrieve information from
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* the Power Distribution Panel via CAN.
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* The information will be displayed under variables through the SmartDashboard.
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*/
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class Robot: public SampleRobot
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{
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// Object for dealing with the Power Distribution Panel (PDP).
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PowerDistributionPanel m_pdp;
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// Update every 5milliseconds/0.005 seconds.
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const double kUpdatePeriod = 0.005;
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public:
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Robot() {
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}
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/**
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* Retrieve information from the PDP over CAN and
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* displays it on the SmartDashboard interface.
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* SmartDashboard::PutNumber takes a string (for a label) and a double;
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* GetCurrent takes a channel number and returns a double for current,
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* in Amperes. Channel numbers are printed on the PDP and range from 0-15.
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*/
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void OperatorControl()
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{
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while (IsOperatorControl() && IsEnabled())
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{
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// Get the current going through channel 7, in Amperes.
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// The PDP returns the current in increments of 0.125A.
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// At low currents the current readings tend to be less accurate.
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SmartDashboard::PutNumber("Current Channel 7", m_pdp.GetCurrent(7));
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// Get the voltage going into the PDP, in Volts.
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// The PDP returns the voltage in increments of 0.05 Volts.
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SmartDashboard::PutNumber("Voltage", m_pdp.GetVoltage());
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// Retrieves the temperature of the PDP, in degrees Celsius.
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SmartDashboard::PutNumber("Temperature", m_pdp.GetTemperature());
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Wait(kUpdatePeriod);
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}
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}
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};
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START_ROBOT_CLASS(Robot)
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