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"Aaron Goodman" wrote:
> also in you example you specify the data as #0x02, why isn't it #0x02:8
(how the manual says to do data)?
That's because I don't like to type more than is necessary! :-)
Take this line for example:
mov.b #0x02:8,r0h
This line is doubly redundant. The destination operand is an 8-bit
register so the other qualifiers are unnecessary. It could be
written as:
mov #0x02,r0h
and the assembler is happy (and so am I).
> As for Sensors I was able to find (I think) how to work it:
> in the h8300.rcx file (no idea what this is for) I found the addresses of • the sensor ports (0xe0,0xe2 and 0xe4)
>
> to make unactive run 'bclr r6l,@0xbb:8'
> to activate run 'bset r6l,@0xbb:8'
> where r6l contains the the value for the correct sensor out
> Then after that I need to waste around 32 states and make it unactive and • then to read it i do
> mov.b @0xe8:8,r6h
> or.b r6l,r6h
> mov.b r6h,@0xe8:8
> and activate it again when I'm done?
> If this is correct please explain what the last two lines do, I just
blindly copied them from the brickos kernel
Ok, for all of the above I'm going to suggest you read the A/D
Converter chapter in the User Manual (aka Hardware Manual).
It explains it in greater detail than I could (and since I don't have
it memorized I'd have to reference it myself to answer your
questions!)
> (I'm guessing 0 for sensor 1, 1 for sensor 2 and 2 for sensor 3?)
No, it's actually 2 for sensor 1, 1 for sensor 2, 0 for sensor 3.
> Also once I have a program written can I just assemble it with binutils
and then use dll to download it to the rcx? Do I need to specify where it
will be loaded to at the begginining of my program? Do I need to write code
to deal with the on and off buttons or does the rcx take care of that for
me?
If you're writing a standalone asm program (i.e. not using legos), you'd
use firmdl3 to download the compiled .srec file. Your linker
script (example: the h8300.rcx file) specifies where your program
starts - which is always 0x8000, BTW.
> Another thing, do I need to worry about resetting the watchdog timer?
No, it's not being used in that capacity unless you explicitly set
it up to run that way.
> and once I finally do get my program writen how do I assemble it? what
command do I use, I have the cross compiler and binutils set up for my legos
installation.
Here, I've extracted a portion of a make script. This should
give you the basic idea, but of course, the tools all support
a zillion options and it is best to read the docs for anything more
elaborate.
set TOOLDIR=/h8300-000821/H-i686-cygwin32
set TOOLPREFIX=${TOOLDIR}/bin/h8300-hms-
set AS=${TOOLPREFIX}as
set LD=${TOOLPREFIX}ld
set OBJCOPY=${TOOLPREFIX}objcopy
${AS} ldccasm.s -o ldccasm.o
${LD} -T ldcc.lds ldccasm.o ldccbase.o ldccmain.o -Map ldcc.map -o ldcc.out
${OBJCOPY} -O srec ldcc.out ldcc.srec
HTH,
Mark
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