Subject:
|
Re: Basic assembler and downloader question
|
Newsgroups:
|
lugnet.robotics.handyboard
|
Date:
|
Tue, 9 Jan 2001 14:16:05 GMT
|
Viewed:
|
946 times
|
| |
|
|
OK, I didn't see the following before.
The HB has its reset vector at $BFFE. So the second ORG must be
there, not at $FFFE.
Please see
http://handyboard.com/faq/display.php?key=memmap
for more info.
Fred
In your message you said:
> I tried using dl.exe and the download appeared to work. However, the LED
> still did not turn on. Is something wrong with my code? Perhaps the RAM is
> not accessible at this point as the chip is in bootstrap mode?
>
> Again here is the listing (with the added loop thanks to Fred):
>
> ORG $8000
> LDAA #$40
> STAA $1000
> LOOP BRA LOOP
> ORG $FFFE
> FDB $8000
>
> Seems simple enough to me. I would think that resetting the board would
> then light the LED. Again I can easily go over to IC and type:
>
> poke(0x1000, 0x40);
>
> and the light will come on as expected. I will greatly appreciate any
> further feedback to get me on the right track.
>
> Thanks,
>
> Brian
>
>
> In lugnet.robotics.handyboard, Fred G. Martin writes:
> > Brian
> >
> > Try using dl.exe rather than dlm.exe
> >
> > Also, put a line
> >
> > LOOP BRA LOOP
> >
> > after you store the value in the Port A. otherwise the 6811 will
> > happily execute whatever's next in memory.
> >
> > Fred
> >
> > In your message you said:
> > > Hello All,
> > >
> > > I recently completed assembly of my Handyboard and now I'm excited to be
> > > moving into the coding realm (which is more my area). I was able to get
> > > Interactive C to communicate with the board.
> > >
> > > However, given my nature of wanting to understand things more fully before
> > > enjoying myself, I decided to write some simple assembly code to mimic the
> > > part of the IR test done during the assembly of the handyboard ( poke(1000 • ,
> > > 0x40) or something like that) that essentially turned on the IR LED.
> > >
> > > I coded up this simple .asm file and compiled it using the Motorola
> > > assembler (as11.exe)
> > >
> > > ORG $8000
> > > LDAA #$40h
> > > STAA $1000
> > > ORG $FFFE
> > > FDB $8000
> > >
> > > I then ran dlm (in DOS mode as hbdl has not worked at all for me) using th • is
> > > command line:
> > >
> > > dlm irtest.s19 -256
> > >
> > > Everything seems to download fine but I get some error messages at the end
> > > of the dlm run such as the ones that follow:
> > >
> > > Board memory error: wanted 86, got 3e at address 8000
> > > Board memory error: wanted 40, got 86 at address 8001
> > > etc...(3 more similar errors)
> > >
> > > The 86 and 40 are the opcodes for what should be at those addresses and it
> > > would seem that dlm is checking to make sure they are there but they are n • ot
> > .
> > >
> > > Obviously the IR LED never comes on like I want it to. Can someone please
> > > tell me if my error is in my irtest.asm file listing I gave or in my usage
> > > of dlm.
> > >
> > > Thanks in advance,
> > >
> > > Brian
|
|
Message has 1 Reply:
 | | Re: Basic assembler and downloader question
|
| That did the trick. Thanks for helping me out with something so basic. I guess that I am next going to read up a little further on how the HandyBoard is using the special mode variations of the Motorola chip while still being able to access the (...) (24 years ago, 10-Jan-01, to lugnet.robotics.handyboard)
|
Message is in Reply To:
| | Re: Basic assembler and downloader question
|
| I tried using dl.exe and the download appeared to work. However, the LED still did not turn on. Is something wrong with my code? Perhaps the RAM is not accessible at this point as the chip is in bootstrap mode? Again here is the listing (with the (...) (24 years ago, 9-Jan-01, to lugnet.robotics.handyboard)
|
6 Messages in This Thread:
  
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
This Message and its Replies on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
