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ZVere's avatar
ZVere
Icon for New Contributor rankNew Contributor
4 years ago

Slow access to avalon from NIOS

Hello, My baremetal NIOS application is writing to 32bits registers in the FGPA via AVALON bus. The code is: void GwbrWriteWord32 (alt_u32 Offset, alt_u32 Data) { IOWR_32DIRECT (0, Offset,...
EricMunYew_C_Intel's avatar
EricMunYew_C_Intel
Icon for Frequent Contributor rankFrequent Contributor
4 years ago

The long latency that you got is correct due to the fact that IOWR_32DIRECT is bypassing data cache.