Content originally posted in LPCWare by DannyBergh on Tue Aug 05 00:54:23 MST 2014
It think what he means is that he wants to transfer a 8 or 16 bits port using DMA. The trigger moment is an external clock line. So there are multiple IO's for parallel data, and one clock line to synchronize these. I don't know if the MCU has capture inputs and if they are linked with the DMA? Or you could use a less elegant solution and use a timer with an external clock (your sync line) and let it overflow each clock, this timer interrupt can be used by DMA to trigger?