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Example : dwExposureTimeAbsolute is not working #60

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cho45 opened this issue Nov 6, 2019 · 2 comments
Open

Example : dwExposureTimeAbsolute is not working #60

cho45 opened this issue Nov 6, 2019 · 2 comments

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@cho45
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cho45 commented Nov 6, 2019

https://github.com/makenai/node-uvc-control/blob/master/lib/controls.js#L92

Because the Type of EXPOSURE_TIME_ABSOLUTE_CONTROL(CT_EXPOSURE_TIME_ABSOLUTE_CONTROL = 0x04 ) is PU for some reason, if you try to change CT_EXPOSURE_TIME_ABSOLUTE_CONTROL, the gain of PU (PU_GAIN_CONTROL = 0x04) will be changed.

AS-IS: Gain of PU is changed.
TO-BE: Exposure_Time_Absolute is changed.
@joelpurra
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I can confirm that it should be CT, by looking at 4.2.2.1.4 Exposure Time (Absolute) Control (page 83 or 98) in UVC 1.5 Class specification.pdf.

See also Table A- 12 Camera Terminal Control Selectors (page 159 or 174).

This was referenced Apr 10, 2020
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@joelpurra
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See #64.

joelpurra added a commit to joelpurra/node-uvc-control that referenced this issue Sep 1, 2020
@joelpurra
Revert some controls to camera input terminal
d2ae47e 
- Possibly related to the previous commit which had a typo affecting camera input terminal (CT) controls.
- There might be other bugs in the control data, should check against UVC v1.5 reference.

Fixes makenai#60

See

- makenai#60
- https://www.usb.org/documents?search=uvc
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V2 control transfer target device joelpurra/node-uvc-control
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@cho45 @joelpurra