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Altera_Forum
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20 years ago

PIO devices under uClinux

I'm having a problem getting the PIO ports to work under uClinux. If I try to access the PIO by reading or writing to the memory location, pointed to by the pio struct, then nothing seems t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

Hi trk_golf,

Glad you have things working :-)

> When trying to use the "outl" and "inl" macros, there is a problem.

> These only expect an address of size short.

They expect the full 32-bit address. They are macros with inline assembly

that use register parameters -- the full 32-bits, unmodified. When used with

the inline string io functions, these are traditionally defined as unsigned long.

You shouldn't have observed any problems.

Best Regards,

--Scott