Cannot Assign Gyro to Second Analog Sidecar

[nabioullinr]

When I try constructing a gyro with Gyro(2, 1), corresponding to analog port 1 of analog sidecar 2, I receive runtime kernel exceptions stating that the gyro must be connected to port 1. However, I tried constructing an AnalogChannel(2, 1), and it worked, returning the raw voltage. Next, I tried constructing a Gyro with an AnalogChannel, and now I receive a different exception (An address parameter to a method is NULL in GetAccumulatorOutput()). Do I need to construct/initialize the second analog sidecar? (The first one is in slot 1 and apparently does not have to be constructed, since all of the above worked with it).

Any ideas? Thanks in advance.

[apalrd]

You should not need to open the analog breakout board. There is no way to open it, as far as I know..

Why are you using the gyro on slot 2 instead of slot 1? Did you run out of analog channels for gyros on slot 1? If so, that could be your problem. I think you can only have 2 gyros/accelerometers integrated by the FPGA at one time, although I might be wrong and it might be 2 per slot. After that, you have to integrate it in software.

[nabioullinr]

No, I already have a working gyro (connected to slot1 port1); I need to connect another one (slot2 port1).

[Joe Ross]

The gyro requires an accumulator in addition to the normal analog "stuff" in the FPGA. There are two accumulators implemented in the FPGA, on Slot 1, inputs 1 and 2. If you want to use two gyros with the WPILIB gyro code, that's where you have to use them.