Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

incompatible type for argument 2 of '__builtin_stwio'

I'm trying to write to memory using the IOWR_32DIRECT function, however I'm receiving an error complaining about an incompatible type. I'll have to admit that it's difficult to find the specifics on ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

--- Quote Start ---

Any structures used to (directly) map io registers should also have all their fields marked 'volatile'.

--- Quote End ---

Which is a huge oversight I made too - I should have written: 


# define MyPeripheral ((s_MyPeripheral volatile *) (0x80000000UL | MY_PER_BASE))

Bill