pasm arrays from spin to pasm and back

pilot0315

I have been looking for beginning code for arrays in pasm and have been finding broken links.
Does any one have some simple beginning code for passing arrays from spin to pasm?

Thanks

Wuerfel_21

arrays are essentially just a lot of variables in a row. Just pass the address of the beginning using PAR or something and then add the the index you want to access to it. Make sure to shift the index left by 1 bit for a word array and 2 bits for a long array.

pilot0315

I will try that
Thanks

JonnyMac

You need to know the base address in the hub, plus the variable size. PASM sees the hub as a big array of bytes, so if your array is words or long, you'll have to increment/decrement your array pointer by two or four accordingly. Also, use the appropriate hubop for your variable size.

pilot0315

Figured it out thanks to all

David Betz

It's a little trickier if you want the array to be on COG memory. Then you have to use self-modifying code.

pilot0315

Example of self modifying code??

tomcrawford

Here's one that uses tables to convert binary to BCD: http://forums.parallax.com/discussion/165004/double-precision-binary-to-bcd-conversion#latest