Open rbrth opened 8 years ago
According to the cfg code, flash_delay should be able to accept negative values.
Here's 2 caveats from the actual source code: 1 - when setting to free-run mode, the flash delay/duration are hard-coded to 0/1000, to facilitate default compatibility with externally triggered slave cameras. Let me know if this is the cause of your issue, in which case we can find a better solution.
2 - when setting flash parameters, the requested delay/duration values are first saturated within the camera's min/max values. If your camera does not support negative flash delay, then rqt_reconfigure will automatically update to the capped value (=0).
Thank you for the quick reply! :)
1 - We do not run the camera in free-run mode. It is software triggered.
2 - Our camera ( https://en.ids-imaging.com/store/ui-5250re-poe.html ) should support negative flash delay. We have tested this under the IDS camera manager under Windows.
What do you mean with "the requested delay/duration values are first saturated within the camera's min/max values." ?
Thanks! Ruud
Before setting a user-requested flash delay value, the code first retrieves the camera's minimum and maximum delay values, and then checks+updates the requested delay value to be within the min-max range.
Clear. Thanks.
I will double check if our camera supports negative flash delay and what the minimum and maximum delay values are.
My colleague updated me on your first point:
1- when setting to free-run mode, the flash delay/duration are hard-coded to 0/1000, to facilitate default compatibility with externally triggered slave cameras. Let me know if this is the cause of your issue, in which case we can find a better solution.
We are running the camera in free-run mode! :-)
In that case, the solution might be as easy as commenting out this line. Essentially, instead of manually forcing the flash parameters to hard-coded values each time entering free-run, we hope that the user chose sensible values, or used default dyncfg values of delay=0 and duration=1000.
If commenting out that one line causes other issues, then you might have to comment out that whole block, meant to generate a pulse signal on flash output pin.
Please test this fix out thoroughly, as I unfortunately don't have the cycles to address this till at least next week. Let me know if/which fix works, so I can make the change permanent.
Thank you for the help.
I commented out the line, recompiled it with catkin_make and changed the flash parameter to a negative value.
However, when running and checking rostopic echo /ueye_gripper_cam_nodelet/parameter_updates
, the flash_delay is set to 1.
I will further look into the code next week to see if I can force the delay in there somewhere :-)
Best, Ruud
I am trying to set the flash delay to a negative value. According to the documentation this should be possible from -1000000us to 1000000us
However, in the RQT GUI setting negative values is not possible.
Best, Ruud