lpcware

Problems With DMA while receiving Video data at 27 MHz Data Rate

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 18, 2016 by lpcware
Content originally posted in LPCWare by chidambaramnkl on Thu Mar 31 11:03:07 MST 2016
we used SCT Module and DMA to capture video data. DMA is Triggered every Pixel clock (27MHz) to read video data at port 4 and store it in SD RAM.we made the DMA Configuration similar to application initialization note(AN11365v1.2).Problem is that DMA transfers half of the horizontal line data i.e. 720 bytes instead of 1440 bytes.We are running the application using  lpc link 2 debugger.Micro Controller running at 204 MHz Speed. Will running by  debugger  affects the performance of the DMA. Please help to solve the problem.

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