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Altera_Forum
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12 years ago

Nios2 memory mapped slave - addressing issue

Dear community, I need your help. I implemented an component -> a wrapper for a single-port ram with a 32-bit width for each memory cell. I am trying to understand the addressing schema. In C ...
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Altera_Forum
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12 years ago

The _32DIRECT macros use byte adressing, so IORD_32DIRECT(storagePtr,0),IORD_32DIRECT(storagePtr,1),IORD_32DIRECT(storagePtr,2),IORD_32DIRECT(storagePtr,3) will in fact return the same value, the word at register number 0 on your component. IORD_32DIRECT(storagePtr,4) will return register number 1, etc... The same works for IOWR_32DIRECT