AnsweredAssumed Answered

Problem with VIU when using ITU656

Question asked by Sebastian Waldraff on Nov 25, 2014
Latest reply on Mar 13, 2015 by Sebastian Waldraff

Hi,

 

We connected a analog camera to an external video-decoder (adv7180) which is connected to the viu using the 8bit itu656-interface (Vybrid VF512R3CMK4).

When we start the video-decoder it sends out the serial protocol, and we can see correctly the protocol (SAV/EAV starting with FF 00 00 XX, where XX has different state for field/vsync/hsync, ...)

The VIU detects field-irqs, but we don't get any vsync-irq.

Although we don't get any error-irqs, so it seams that the received protocol is correct (see ecc-errors in scr-register of viu), but the internal decoder from the viu-module doesn't generate a vsync-irq.

 

Has anybody use the viu using the 8bit itu656-mode ??

 

Here's the pining

PTC2 -> VIU_DATA2

PTC3 -> VIU_DATA3

PTC4 -> VIU_DATA4

PTC5 -> VIU_DATA5

PTC6 -> VIU_DATA6

PTC7 -> VIU_DATA7

PTC8 -> VIU_DATA8

PTC9 -> VIU_DATA9

PTB16 -> VIU_DATA10

PTA7 -> VIU_PIX_CLK


Another question is : How does the viu differ between 8bit and 10bit itu656-mode ?

 

Regards

Sebastian

Outcomes