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Altera_Forum
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14 years ago

Creating Memory device for Nios II processor

Hello, I want to transfer data from my custom component to the processor. Ideally it would be possible to access the data using pointer. Normally I would have to use IORD and IOWR macros to cir...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Short update if anyone stumbles upon this thread. I've attached my module as a memory device to the Nios II processor. The magic is that you have to define the device as a memory device in the _hw.tcl script.

Before reading from the device you have to flush the processor read cache for that memory region: 


alt_dcache_flush_no_writeback((void *) <address of burst IF>, <length of burst IF memory region in bytes>);
Regards

Martin