>> first surprise: HD and VD lines on DC4 seem to be always '1'. Don't >> know how Davinci could know when a video frame (or line) starts...
Is the video input device (video decoder/camera) encoding the data in BT656 format? If so, it could be using 'embedded sync' codes (SAV/EAV) - separate HSYNC/VSYNC aren't required in this case. See SPRUE38A (VPFE) section 2.2 for more info (specifically, look at page 20). If you want to use separate HSYNC/VSYNC signals, take a look at the "Generic YUV" mode of the VPFE (section 2.3.1/page 22). It looks like it would be the same as BT656 in all other respects - but relies on external clocking. -Paul --------- Original Message -------- From: Carlos Ojea <[EMAIL PROTECTED]> To: [email protected] <[email protected]> Subject: input data through 'video in' port (DC4) Date: 08/11/06 10:45 > > Hello: > > I am trying to import raw data from DC4. > First I modified 'encodedecode' sample program to get video data > without encoding or decoding. With that program I could see and dump > video data but... first surprise: HD and VD lines on DC4 seem to be > always '1'. Don't know how Davinci could know when a video frame (or > line) starts... > > Then we attached our data source to DC4, and we put 1.8V to > 'CAPTURE_EN' to 'disconnect' tvp5146. Davinci seems to ignore HD and > VD and start capturing frames depending on wich data is received. No > sense, since VDHOUT bit in CCDC_SYN_MODE is '0', so HD and VD MUST be > inputs. > I am using 'waitForFrame' function of 'encodedecode' app example to > wait for frames. > > Any idea? Thanks, > Carlos > _______________________________________________ > Davinci-linux-open-source mailing list > [email protected] > http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source > > > > > _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
