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Altera_Forum's avatar
Altera_Forum
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15 years ago

I got a really strange experience

I use nios IDE to develop a test system, when put .sof files into the DE2 develop board and run C files of niosII, I can get a correct result. But when I change the C files, recompile it and run it, ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

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It is right that I store the software on the FPGAs internal block RAM, but when I redownload the .sof file, the RAM in the FPGA should be cleared up.

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Downloading the .sof file does not necessarily clear the RAM. In addition to the hardware configuration, the .sof also contains the initial contents of the RAM. For some systems, the initial RAM contents may be clear, but it may also contain things such as your Nios code.