scaled JTC does not work on fake_hw

[fmauch]

When trying to use the scaled JTC on Fake HW I get

[ros2_control_node-1] terminate called after throwing an instance of 'std::underflow_error'
[ros2_control_node-1]   what():  addition leads to int64_t underflow

Obviously this needs to be further debugged, but I wanted to post it here as a first step.

[fmauch]

Update: It seems that all floating point io states generate a nan value when using fake_hw. @destogl do you know where this could come from? For example, the output of the /io_and_status_controller/tool_data is

...
tool_output_voltage: 0
tool_current: .nan
tool_temperature: .nan
tool_mode: 0

[ferrolho]

I think we can remove the "galactic:" prefix from the title ─ I just tested this on ROS 2 Humble, and I am getting the same error message:

[ros2_control_node-1] terminate called after throwing an instance of 'std::underflow_error'
[ros2_control_node-1]   what():  addition leads to int64_t underflow

[fmauch]

@ferrolho thanks for adding this information

[haider8645]

This seems to be still open. I had to switch the SJTC to JTC on humble.

[fmauch]

the scaled jtc should work on mock hardware (fake hardware on humble) by now.