Honored Contributor
Honored ContributorIf you see blocks of zeroes, maybe you could make sure that your software only uses non-zero data and then trigger on a null data word?
Something else that could be worth checking is that the buffer that you use for the DMA transfer is not sharing its cache line with another variable. This means obviously that it can't be on the stack (i.e. a local variable). If it is a global or static variable, you can use the compiler's __attribute__ ((aligned(32))) to align it's address, but you must also make sure that its size is a multiple of 32. If it is an allocated buffer, some C libraries provide an aligned malloc, or else allocate a bigger buffer and use some bit manipulations to use an aligned zone within the buffer.
