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Altera_Forum
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11 years ago

SoC: Example C-code for accessing Avalon Slave peripherals?

Hi - I recently obtained an Arria V SoC card and I'm having a couple of problems... 1) All my existing designs present an external interface that looks like an Avalon Slave. In the past, I ho...
Altera_Forum's avatar
Altera_Forum
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11 years ago

It's right at the beginning of section 4.2 in the PDF link that I sent. Sure, it's just GPIO accesses, but it is toggling LEDs hanging off either the HPS or FPGA side from Linux "user land" code. I think that's enough to get going. You could also "bit bang" raw memory from within u-boot if you wanted to.

Most other sorts of Linux drivers require a combination of Linux knowledge and knowledge of the hardware that you're interacting with. You have to determine which of the driver "paradigms" that your hardware best fits into based on how you want the HPS side to interact with it. Understanding of both will enable you and your team to design hardware that is efficient and effectively utilized.

What sort of transactions do you want/need to test?

Cheers,

slacker