qasm - A P2 Assembler written in C

Dave Hein

Qasm is a C program that assembles P2 code. I've verified it against the PNUT binaries, and it matches except for some slight differences in floating point constants. I wrote qasm a few years ago so I could write P2 code before PNUT was available. However, even though PNUT is available there are times that I like to run things from the command line. So I brought qasm up to date with the latest P2 instruction definitions. It also generates a list file that might be useful. The list file for all_cogs_blinks looks like this:

                   dat
00000              		orgh	0
                   '
                   ' launch cogs 15..0 with blink program
                   ' cogs that don't exist won't blink
                   '
00000 000          		org
                   
00000 000 fce4040c .loop		coginit	cognum,#@blink
00004 001 f9dc05fe 		djns	cognum,#.loop
                   
00008 002 0000000f cognum		long	15
                   '
                   ' blink
                   '
0000c 000          		org
                   
0000c 000 fd600e01 blink		cogid	x		'which cog am I?
00010 001 f463f607 		setb	dirb,x		'make that pin an output
00014 002 f423fa07 		notb	outb,x		'flip its output state
00018 003 f1040e10 		add	x,#16		'add to my id
0001c 004 f0640e12 		shl	x,#18		'shift up to make it big
00020 005 fd600e28 		waitx	x		'wait that many clocks
00024 006 fd9fffe4 		jmp	#blink		'do it again
                   
00028 007          x		res	1

I included a Windows executable in the zip file. Executables for other platforms can be built from source by running the "buildit" script file.

mindrobots

Cool!!!

All we need is a loader source that works and we can have testers that can't use Windows play along!

Thanks, Dave!!

jmg

That's cool.
Does it support macros and conditional assemble ?
It could follow the gas format for those directives, for portability.

I found some here
http://cs.mtu.edu/~mmkoksal/blog/?x=entry:entry120116-130037

Dave Hein

@mindrobots, yes I had people in mind that can't use Windows, or won't use it (Hi, Heater ). When used along with spinsim you can write P2 code, assemble it and then run it under spinsim on any platform.

@jmg, there are no macros or conditional assembly. It just converts opcodes to binary. I am thinking of adding the capability to produce object files that can be linked together by a linker. However, I'm not planning on adhering to any Gnu standards.

jmg

Dave Hein wrote: »

@jmg, there are no macros or conditional assembly. It just converts opcodes to binary. I am thinking of adding the capability to produce object files that can be linked together by a linker. However, I'm not planning on adhering to any Gnu standards.

Interesting - do you have linking with something else in mind ?

Dave Hein

I'd like to be able to create a library and then link to it to build a program.

potatohead

This is pretty nice Dave.

Heater.

can't use Windows, or won't use it (Hi, Heater )

Hi Dave, I heard that. This is cool, thanks for thinking of us rebels.

Does this understand all the syntax of Spin style VAR and DAT sections that PASM may need to use?

Dave Hein

It doesn't support VAR sections. It should handle the syntax correctly in DAT and CON sections. The only issue I know at this point is that constants must be defined before any lines that reference them.

evanh

mindrobots wrote: »

Cool!!!

All we need is a loader source that works and we can have testers that can't use Windows play along!

I'll mulling over my options right now. PNut.exe is the only loader I presume? Anyone know otherwise?

I was thinking there might be detailed protocol info in the pasm files in Chip's updates but I haven't looked as yet ... must get back to work ....

potatohead

We had P2load on the "hot" chip, but that was a bit farther along in the process.

Peter and Chip were discussing SPI / SD card. If that happens, there is a path for something other than Pnut.

Cluso99

I have been working quietly on shrinking Kye's FAT driver, currently for the P1. Once it's done I can convert it to P2.

Bob Lawrence (VE1RLL)

@Cluso99

re:I have been working quietly on shrinking Kye's FAT driver, currently for the P1. Once it's done I can convert it to P2.

Great! I just started to work on a project that will use PROP 1 FAT and PROP 2 FAT later. if you need a tester later just let me know.