sub get_number {
my ($arg) = @_;
return eval($arg);
}

(perl) operations in numbers may be used:
stf r3, 0x12 | 23

and if you have in your asm-file (say ‘my-code.asm’) ‘#include “defs.h”‘ (a file with defines like:

#define CPY 0x10
…

and pass it through cpp:

cat my-code.asm | cpp | sdma_asm.pl

you will be able to use in your code this kind of expressions:

stf r1, MD | SZ0 | FL

provided (of course) ‘MD’ ‘SZ0′ (and so on) are defined in ‘defs.h’

Voila

Thanks for this series of quite helpful articles on the SDMA.

I am wondering if you have more details on the “Gotchas” you put on this page, in particular the 32 bytes boundary crossing on the EIM bus.

I think I have the same kind of trouble on an i.MX25 processor. So far it seems I need the EIM address to be 32 bytes aligned to get the SDMA working correctly.

I was wondering if you got more insight on the problem and how to work with/arround it (as mandating 32 bytes alignement is not always practical in particular when “speaking” to a device).

Thanks

JC