AX12 support

[peterheim1]

Hi I get a sync read error and a groupsync error using AX12 servos with ros2 galactic on ubuntu 20.4
can support be added for the AX12 servos

[youtalk]

The dynamixel_control is dependent on the dynamixel_workbench. If the dynamixel_workbench can be run with the AX 12 servos, I hope the dynamixel_control can be also run with them.

[ROBOTIS-Will]

@peterheim1
Please note that the DYNAMIXEL Protocol 1.0 does not support Sync Read instruction.
Since AX-12 is based on DYNAMIXEL Protocol 1.0, it doesn't support Sync Read, but does support Bulk Read.
https://emanual.robotis.com/docs/en/dxl/protocol1/#instruction

[peterheim1]

the write seem to work fine the are moving
can the bulk read be added or what needs to be changed for this to work?

[ObjExtract]

@peterheim1 Did you get this to work? How? Thanks