Simple way to copy last byte of a long to a new variable?

brianm734

I am pretty new to SPIN. Is there a simple way to copy the last byte (LSB) of a long variable to a new byte sized variable?
Thanks

Phil Pilgrim (PhiPi)

byte_variable := byte[@long_variable]

... or just

byte_variable := long_variable (assuming byte_variable is declared as byte)

-Phil

brianm734

Great Phil, Thanks.

JonnyMac

You can get to any byte in a word or long using .byte[] notation as well.

bytevar := longvar.byte[0]

It's really not necessary for byte 0 (as Phil pointed out above), but useful for the others.

Beau Schwabe

There is also a way to do it without using any additional program overhead if you can define your long variable in the DAT section.

See this link:
http://forums.parallax.com/showthread.php?133583-VAR-Aliases...&p=1024313&viewfull=1#post1024313

Example using the Propeller demoboard or QuickStart LEDs:
http://forums.parallax.com/showthread.php?112970-Word-Sized-constant-in-Byte-array&p=808493&viewfull=1#post808493