Another DoubleSolenoid question

[jfitz0807]

We're constructing our DoubleSolenoid as follows in RobotMap.cpp

pneumaticSubsystemSolenoid = new DoubleSolenoid(11, 0, 1);

The '11' is the CAN ID of the PCM. With these parameters, our compressor starts automatically as expected. However, we're getting the following error:

Error on line 87 of Resource.cpp: Allocating channel that is out of range: Solenoid 0 (Module: 11)

When we change the '11' to a '1', this error goes away, but our compressor doesn't start.

Any thoughts?

[ozrien]

Hmm it looks like that assert will trip on anything >= PCM Device ID 8....

const uint32_t solenoid_kNumDO7_0Elements = 8;

...HAL.cpp in wpilib. This gets passed into a Resource object which trips on line 87 of Resource.cpp.

Not sure if that's the intent of the code's author, but I would keep the device ID less than '8' just to be safe. Hopefully you have less than 8 PCMs!

The reason changing the param in your c'tor to '1' from '11' breaks the compressor is likely because you didn't change the PCM ID to '1' in the RIO web-page config.

Setting the device ID...
http://wpilib.screenstepslive.com/s/...ribution-panel

[Alan Anderson]

Why have you changed your PCM from the default ID of 0?