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Hello, I have a question concerning the PPI Interface. I am using the program "BF533_EZ_KIT_Video_Receive_C_Long_DMA" to read in a video image into the SDRAM memory. I have connected a PAL video camera with the Evaluation Board. The analogue camera signal consists of the even and the odd field, which were transmit one after another. Also the digital videostream after the A/D conversion consists of these two parts. In the PPI register "PPI_Control" I have the possibility to choose which signal I want to send to the SDRAM. FLD_SEL = 0 => Field 1 (= odd field), or FLD_SEL = 1 => both fields. Here are my questions: 1) When I choose "FLD_SEL" = 1 both fields were transmitted into the SDRAM, and I can see the complete image. But where were the fields connected to one frame? In the PPI Interface? 2) When I choose "FLD_SEL" = 0, I expected that only the even or odd field is stored in the SDRAM but I can see still the full image. What is wrong? I want to store either the even or the odd field with this setting. Thanks, Markus |
PPI Config problem
Started by ●January 7, 2004
