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ROBOTIS-GIT / OpenCR

Software for ROS Embedded board (a.k.a. OpenCR). OpenCR means Open-source Control Module for ROS.
Apache License 2.0
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Do we need to set the USB Latency Timer Setting when using the OpenCR under Linux? #234

Closed robotiscustomer closed 3 years ago

robotiscustomer commented 4 years ago

Hi, under Section 5.4.1.2 USB Latency Timer Setting of the OpenManipulator-X e-Manual, it is mentioned that to set the latency time from 16ms to 1ms when using the U2D2, one should use:

$rscore $rsrun open_manipulator_controller create_udev_rules

How about when using the OpenCR in different platforms such as the OpenManipulator-X, TurtleBot3, OP3 and user created robots that use OpenCR in ROS or Embedded environments? There is no mention about setting the latency to 1ms under Section 5.4.2 OpenCR.

Thanks

ROBOTIS-Will commented 4 years ago

@robotiscustomer You don't need to (and can't) set a latency timer for ttyACMx. In case of ttyUSB with FTDI chips, default latency of 16ms is introduced and sometimes it prevents high speed communication between the host and peripheral devices.