Forum Discussion
jackhab
Occasional Contributor
Occasional ContributorReading data from FPGA on HPS with Linux - what's the best way to do it?
I have a Cyclone V with Linux application on ARM.
The application accesses FPGA directly by mapping HW light- and heavy-weight bridges into virtual memory space (without kernel driver).
Current...
jackhabOccasional Contributor
Occasional ContributorHi Tiwari
I, indeed, use mmap() to gain access to FPGA memory space. But my question was about what happens during actual read and write.
Should I read the memory word-by-word using alt_read_word() function or reading big memory chunks using standard memcpy() also OK?
I am asking it because I'm not sure how ARM's data caching will behave during mempcpy() and I'm afraid caching can cause data corruption.
