GPIO -- that makes sense. How about the ADCs? I suppose using those would involve writing or finding some software that would recognize it as a video stream.
New plan is to ignore (for now) any sort of composite video coming from the BeagleBone, we've got an alternative to that that doesn't require extra hardware (DAC or... USB to VGA to composite) or writing signal encoding software. A possibility we considered briefly was using the USB port for one camera and the microUSB for the other. Does that seem feasible? We ended up ruling out that possibility, but I'm curious as to whether it would work. Thanks for the help. On Tuesday, September 30, 2014 1:25:30 AM UTC-5, liyaoshi wrote: > > About the CVBS signal ，in omap3 and mx53 ， it will be called TV encoder > module > > > 2014-09-30 14:16 GMT+08:00 liyaoshi <[email protected] <javascript:>>: > >> Because I work for automotive company . if this confuse you , ignore the >> surroud view and adas . >> >> >> About the ISP , what I understand . >> >> from >> http://pub.ucpros.com/download/ov7620_ov7120_v1.2whole.pdf?osCsid=g3j4cfseca1627jv9mc4lans75 >> >> You will get bt656 signal at last , right ? how do you connect to your >> BBB board ? >> >> with USB ? You must have another mcu to convert BT656 digital signal to >> memory data >> >> right ? so , if you can connect directly to OMAP3 ,you can save the USB >> MCU >> >> Here is about the cvbs signal >> http://en.wikipedia.org/wiki/Composite_video >> >> You can see , its a analog signal with base band . But , with gpio , it >> can only generate 1 or 0 ,totally different raspi FM >> >> >> 2014-09-30 13:11 GMT+08:00 Peter Fearing <[email protected] <javascript:> >> >: >> >>> I'm not sure what you mean by surround view/adas. They're both forward >>> facing and will be fixed in position to try to eliminate any possible >>> alignment issues. >>> >>> I can't see that the ISP is necessary for all image processing. If so >>> that would make the Black completely incompatible with any sort of camera >>> project, and I've found plenty of examples of people using cameras with it >>> -- just no analog cameras yet, which to be fair won't be necessary for the >>> final version of what we're doing. >>> Certainly there are available capes for expanding the USB capabilities, >>> and it's possible the necessary cameras can be recognized as USB cameras. >>> I've even seen a couple camera capes that are comparable to what we're >>> doing. >>> >>> Can you be more specific about the limitations on generating a CVBS >>> signal? >>> >>> On Friday, September 26, 2014 2:22:40 AM UTC-5, liyaoshi wrote: >>>> >>>> And >>>> omap3 have 3 hardware overlay >>>> >>>> 2014-09-26 15:11 GMT+08:00 liyaoshi <[email protected]>: >>>> >>>>> If I understand correctly >>>>> It should like surround view or adas ? >>>>> and as I know , AM335X don't have isp . while omap3 have it . >>>>> while cvbs signal in . camera module will turn to bt656 or what ever >>>>> digital signal , as usually BT656 >>>>> >>>>> And when you can catch BT656 digital signal . you can program it to >>>>> overlay or something . >>>>> >>>>> And about the CVBS out signal . You can NOT generate it by GPIO . >>>>> >>>>> For Your application .As I think , You should use OMAP3 BB-XM board >>>>> with omap3 soc >>>>> >>>>> It will have a isp and cvbs out,only problem is it will only have 1 >>>>> isp >>>>> >>>>> if you want to get another work with usb . >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> 2014-09-26 4:32 GMT+08:00 <[email protected]>: >>>>> >>>>> Hi all >>>>>> >>>>>> I and a couple guys are trying to build a system from the BeagleBone >>>>>> Black that uses an IR and color camera for quadcopter video. >>>>>> We have one of each of these cameras >>>>>> http://dlnmh9ip6v2uc.cloudfront.net/datasheets/ >>>>>> Sensors/LightImaging/32KM_spec.docx.pdf >>>>>> http://pub.ucpros.com/download/ov7620_ov7120_v1.2whole.pdf?osCsid= >>>>>> g3j4cfseca1627jv9mc4lans75 >>>>>> http://www.drs.com/products/rsta/PDF/Tamarisk.pdf >>>>>> The end goal is to be able to output a video stream of either (1) the >>>>>> color camera (2) the IR camera (3) a composite video - b/w or color, >>>>>> overlay or other. It has to be composite video for the quadcopter. >>>>>> (it's a >>>>>> system already setup and we're just doing add-on) >>>>>> Known problems: >>>>>> The BeagleBone Black only has one USB port. I can probably figure >>>>>> out how to make the IR camera recognizable by the system through the USB >>>>>> port, but the other two are a bit more complicated -- one is purerly >>>>>> analog >>>>>> NTSC and the other has a variety of digital options and a monochrome >>>>>> NTSC >>>>>> backup/test output. Maybe there's a way to configure the GPIOs to >>>>>> handle >>>>>> this? >>>>>> I'm planning on using OpenCV for the overlay/processing, though I'm >>>>>> not very familiar with it. >>>>>> >>>>>> Sound crazy? It is, but that's what we're doing... >>>>>> >>>>>> -- >>>>>> For more options, visit http://beagleboard.org/discuss >>>>>> --- >>>>>> You received this message because you are subscribed to the Google >>>>>> Groups "BeagleBoard" group. >>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>> send an email to [email protected]. >>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>> >>>>> >>>>> >>>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "BeagleBoard" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected] <javascript:>. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
