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memcpy and SHARC 21369

Question asked by whogoesthere on Sep 16, 2011
Latest reply on Sep 21, 2011 by whogoesthere

Im using the memcyp function to transfer vectors around, both internally and externally. When I transfer 1024 floats from internal memory to SDRAM it takes 2640 processor cycles but if i transfer the same floats from SDRAM to internal memory it takes 20656 cycles. I know the SDRAM is significantly slower and requires clock alignment but.. a factor of ten difference?

Any comments ?

PS.. does anyone have DMA code to transfer from internal memory to SDRAM and vice versa for 21369 processor ?