We are trying to get video for processing from TVP5147.
Following are our observations based on the tests and inputs on ti forum:-
1 – We have checked the TI diagnostics package and the results are as expected but we have observed the change in the VIP parser registers even when no input is connected to Composite input port.
2 – When configured TVP5147 in 10 bit embedded sync mode and 8148 in VIP in 16 bit mode (since the Y lines from TVP are connector to D8-D15 on VIP1A), we have receiving some data with 0xFF 0xXX 0xFF 0xXX (0xFF is configured for TVP C2-C9 lines). We dropped the 0xFF bits but the data part does not give the image.
3 – We have checked by modifying the C2-C9 lines by forcing values through Outputformatter5/6 register of TVP5147 and the data is observed in the frame buffer.
4 – We have checked the pclk from TVP5147 at R154 and found that in 10bit mode the clock is 13.5 Mhz and in 20bit mode it is 6 Mhz (approx.). We assumed that it should have 27MHz and 13.5 MHz. Also a check of Status 2 Register on TVP1547 we see there is no change on signal present detection bit even if video signal is present or removed(It is always 0). With signal connected we see the weak signal bit go high.
5 – As we don't have example code for TVP5147 with TI8148 but if any one can let us know the settings we need to do we might be able to make it working. We are using hdvpss_01_00_01_44 with TI SYSBIOS for these. Does TVP5147 and TI8148 work with the default board settings or do we need to do some modifications on board by additional wiring as some forum posts indicate for TI8168?
We need your help to know what is the correct way to receive NTSC video on TI8148 via TVP5147.
