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ADV212:Continuous compression

Question asked by leechh on Dec 19, 2016
Latest reply on Feb 21, 2017 by DaveD

Hi DavaD

   i met a problem when using DMA burst mode to compress a YCbCr image. 

   The burst length is set to 128, dreq1/dack1 are for DMA write and dreq0/dack0 are for DMA read.

   I succeeded in reading the compressed code stream of the 1st image. The problem is that after the last burst of DMA read, the dreq1(DMA write request) does not assert, no matter how long i wait, so that i cannot go on writing the next image to ADV212. 

   I am wondering if i have to set some registers again before conducting another DMA write? Or just wait the dreq1 after i finish the last burst read?

   Thanks

DaveD

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