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Nios birdge to Arm QSPI - registers dont get update

Altera_Forum
Honored Contributor II
‎02-11-2018 12:02 PM
1,045 Views

Hello 

 

I have FPGA fabric between the NIOS and the QSPI peripheral (0xff70500) 

 

Basically I can read and write the QSPI registers, 

But seems that the DATA QSPI (which is FIFO and not regular mem) behave strange via the bridge. 

 

look like it doesn't get update and sometime keep give the old data and not the new one (like cache problem). 

 

It do get update if we stop with the debugger just before the reading operation. 

 

Is there any "UpdteNow" or "refrash" command I missed? 

 

Again, the fabric lead to QSPI FIFO (I think this what make the problem) 

 

Thank 

 

Moti
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