assember reference manual

Javalin · 2006-05-03 21:01

Chaps,

And idea's when the assember reference is going to be released?

Its rather difficult to guess the syntax from the command listing!!

Would this be the missing chapter 3?

Cheers,

James

Gadgetman · 2006-05-03 21:09

No, chapter 3 seems to be about Spin as it's listed as 'Programming Tutorial'.

Chapter 5 is the Assembly-language part, and as it seems to dedicate a whole page/instruction, I assume that it is rather detailed.

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Don't visit my new website...

Jon Williams · 2006-05-03 21:21

I don't know the target date since I'm not writing the manual, but I can suggest you look at the library examples included in the installation -- you'll see a bit of Chip's handiwork in assembly.

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Jon Williams
Applications Engineer, Parallax

Javalin · 2006-05-03 21:27

Hi Jon,

I've been looking at those and the beta group postings, but without a reference its hard to guess the syntax.

For example i've been trying to blink a LED in assembler (you gotta start somewhere) and use the WAITCNT assembler command. In Spin it seems to take only one parameter i.e.
WAITCNT (cnt+X)

in assember the IDE asks for a second parameter........??????

Any prelim material available that could be released on the forums only so people can start to learn.....???

Cheers,

James

Jon Williams · 2006-05-03 21:30

This is the only thing available at this time:

http://www.parallax.com/dl/docs/prod/prop/AssemblyElements.pdf

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Jon Williams
Applications Engineer, Parallax

Javalin · 2006-05-03 21:31

Thanks Jon.

Jon Williams · 2006-05-03 21:48

I found an "internal only" document and can shed some light on that: the second parameter gets added into the first after the operation.· This make sense, especially if you had some sort of loop where waitcnt was controlling timing; by adding the number of cycles after waitcnt, everything happens in one operation.· Using #0 as the second parameter means you'll have to manually reload the first parameter.

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Jon Williams
Applications Engineer, Parallax

Javalin · 2006-05-04 20:06

Jon,

Thanks for looking - its not working - I'll wait for the manual!!

James

Jon Williams · 2006-05-05 03:57

Attached is a simple demo Chip wrote for me, it should help clarify things.· Note that the PAR register is used as an address pointer.· In the demo you can see how the pin and the delay cycles are passed as parameters to the assembly program.

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Jon Williams
Applications Engineer, Parallax

parsko · 2006-05-05 10:05

NOTE for newbies: I am one too, this program works! I'm amazed, but it does. I simply opened it, hit F11, and my LED is sitting on the table next to me blinking.

This is written in assembly. Jon, in theory, this could be used from a "master" cog, in a slave (different) cog independently, since it is pure assm. Sorry, I'm still grasping the concept of having a library of ASSY objects to call upon to do things wicked wicked wicked fast in other cogs.

My point, this works.

-Parsko

Jon Williams · 2006-05-05 13:50

With nothing else running, the program is loaded into Cog 0. When cognew is used, the assembly portion (in the DAT block) is moved to Cog 1.· If you didn't want to pass the values from the Spin portion, you could actually hard-code them as in the example I've attached -- this shows that it takes just one line of Spin to launch a program into a new Cog.

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Jon Williams
Applications Engineer, Parallax

Post Edited (Jon Williams (Parallax)) : 5/5/2006 1:53:24 PM GMT

Javalin · 2006-05-05 18:31

Jon,

Thanks for posting this!

James

assember reference manual

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