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Altera_Forum
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21 years ago

Nios readdata problem

Hi, I have a strange problem about reading the readdata. I designed a user logic and wrote a C code corresponding to it. I hope use this circuit to do caculations twice. And I get right r...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

It could be that the compiler optimized your code or you have data cache turned on. To fix the compiler optimization issue you should make the value volatile and to fix the data cache issue you will need to bypass the cache on the read.

volatile float * p;

p = (1<<31) | 0x920800;