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12409 Discussions

Can i have access to VHDL Signals written memory with my NIOS II ?

JBlec2
Beginner
285 Views

I know that it is possible with the Avalon Bus. But I dont want to use it. I just want to have access on some signals which will come via SPI- Slave Memory, which runs independent .

Maybe you have an idea :D

Thank you !

0 Kudos
7 Replies
JBlec2
Beginner
147 Views

i also could use an extra avalon device that gets the data from the spi :D this would be also very good ( i think )

JBlec2
Beginner
147 Views
JBlec2
Beginner
147 Views

he solved it with a dual port ram - but also uses the avalon bus -

https://forums.intel.com/s/feed/0D50P00003yyQeSSAU?language=en_US

 

it looks like there is no easy way around the avalon bus .. so my spi slave needs to be connected to an avalon interface...

hmm

JBlec2
Beginner
147 Views

and this guy used PIO - but as he needs to transfer al lot of data he gets problems since one trasfer takes 4us .. or something like this : https://forums.intel.com/s/feed/0D50P00003yySGpSAM?language=en_US

so for my little spi slave it should be maybe enough

Ahmed_H_Intel1
Employee
147 Views

Hi,

Any data transferred to or from NIOS II must use the Avalon bus. If you are targetting fast access you have to know that it isn't the Avalon, it is the approach you use. For example, if you put the data on a flash device will require more time to end the process.

Regards,

 

JBlec2
Beginner
147 Views

Hi my friends :D

I write it short: It is unusuaal to do this but for my project it is okay for first tests:

SLIDE-SWITCH ->TOPLVL -> Entity TEST-> PIOIN->NIOS->PIOOUT->Entity TEST2 ->LEDs

It worked........ xD

Ahmed_H_Intel1
Employee
147 Views

Thanks,

Can you elaborate more? which set up worked?

 

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