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Discussion Groups | 68HC12 | problems finding info related to hcs12
Join our technical discussions about Freescale Microcontrollers: M68HC12. (Freescale Semiconductor is a Subsidiary of Motorola).
problems finding info related to hcs12 - Guillermo Jasso Nuņez - Jan 20 20:33:00 2006
I find it amazing the fact that I can't get detailed information of the hcs12, I
trying to obtain info that describes the different operation modes, such as hardware
configuration for programming and for a normal code run as well as other features and all
I find in the freescale website is summarized info, and links to books that claim to have
more detailed information. It is funny because I prefered the hcs12 to the 56800 hybrid
DSP-microcontroller because I though there was more info available related to hcs12. but I
thin that all significant info is located in books, which means I will have to buy one of
this expensive hcs12 books.
am I right? was all the info sold to the books makers or is there some place I have not searched.
Thanks
Fausto ---------------------------------
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[Non-text portions of this message have been removed]
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am I right? was all the info sold to the books makers or is there some place I have not searched.
Thanks
Fausto ---------------------------------
Yahoo! Autos. Looking for a sweet ride? Get pricing, reviews, & more on new and used cars.
[Non-text portions of this message have been removed]
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Re: problems finding info related to hcs12 - Rob Milne - Jan 20 21:39:00 2006
Hi Fausto,
Where there is a will, there is a way. Buying a book may help you, but
I cannot recommend any since I mostly work from the university of google
and tech notes. Maybe someone else on this list can suggest one. I
believe that if your general programming skills are good then you should
find almost everything you need from free resources.
> am I right? was all the info sold to the books makers or is there some
> place I have not searched.
It would be foolhardy for Freescale to hide their technical info when
competitors make theirs free - this being a highly competitive market.
Everything needed to write a low level driver for any chip resource is
in data sheets and app notes (some details can be ambiguous and that is
when a mailing list resource like this one can be invaluable).
Writing the upper layers of sw is a different matter and book publishers
gamble that we'll part with our cash to find the 'answers'. I'm never
greatly impressed with any of it. Getting your hands dirty is the only
answer. This can mean reading source code written by someone else to
learn the 'shape' of well structured code. Sometimes this code is in
expensive books (I have some) but never is it exactly what I want or need.
rob
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
Where there is a will, there is a way. Buying a book may help you, but
I cannot recommend any since I mostly work from the university of google
and tech notes. Maybe someone else on this list can suggest one. I
believe that if your general programming skills are good then you should
find almost everything you need from free resources.
> am I right? was all the info sold to the books makers or is there some
> place I have not searched.
It would be foolhardy for Freescale to hide their technical info when
competitors make theirs free - this being a highly competitive market.
Everything needed to write a low level driver for any chip resource is
in data sheets and app notes (some details can be ambiguous and that is
when a mailing list resource like this one can be invaluable).
Writing the upper layers of sw is a different matter and book publishers
gamble that we'll part with our cash to find the 'answers'. I'm never
greatly impressed with any of it. Getting your hands dirty is the only
answer. This can mean reading source code written by someone else to
learn the 'shape' of well structured code. Sometimes this code is in
expensive books (I have some) but never is it exactly what I want or need.
rob
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
Re: problems finding info related to hcs12 - David Kelly - Jan 20 22:25:00 2006
On Jan 20, 2006, at 6:33 PM, Guillermo Jasso Nuņez wrote:
> I find it amazing the fact that I can't get detailed information of
> the hcs12, I trying to obtain info that describes the different
> operation modes, such as hardware configuration for programming and
> for a normal code run as well as other features and all I find in
> the freescale website is summarized info, and links to books that
> claim to have more detailed information.
I don't understand your problem. For example there are 2 books which
have all the data for the NE64, but no hand holding, for free download.
This is the NE64 specifics. Find the specific data sheet for the HC12
variant you are using. http://www.freescale.com/files/
microcontrollers/doc/data_sheet/MC9S12NE64V1.pdf
For some unknown reason there isn't a link to the generic HCS12
family reference on the NE64 page, likely other HCS12's lack this
link also too. Its: http://www.freescale.com/files/microcontrollers/
doc/ref_manual/S12CPUV2.pdf
--
David Kelly N4HHE, dkelly@dkel...
========================================================================
Whom computers would destroy, they must first drive mad.
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
Re: problems finding info related to hcs12 - Eric Engler - Jan 21 1:23:00 2006
--- In 68HC12@68HC..., Guillermo Jasso "Nuņez"
<cordoba777@y...> wrote:
>
> I find it amazing the fact that I can't get detailed information of
the hcs12, I trying to obtain info that describes the different
operation modes, such as hardware configuration for programming
This may help you to some extent, but this is mostly about EVB boards
that use the d-bug12 monitor:
http://www.ericengler.com/downloads/intro.txt
> I prefered the hcs12 to the 56800 hybrid DSP-microcontroller
because I though there was more info available related to hcs12.
These devices are quite different from DSP devices. These are the
classical microcontrollers. If you don't need DSP functionality then
these devices are probably best for you.
> am I right? was all the info sold to the books makers or is there
some place I have not searched.
There's a lot of sites you haven't visited, I'm sure! The trick is
knowing what to type in at google to find the right info.
You can describe your application here if you want more advice from
others. It's too hard to give you advice if we don't know what you'd
like to do.
By the way, most of us are not Freescale employees, in case it's not
obvious to you. But there are sometimes Freescale employees that post
here.
Eric
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
<cordoba777@y...> wrote:
>
> I find it amazing the fact that I can't get detailed information of
the hcs12, I trying to obtain info that describes the different
operation modes, such as hardware configuration for programming
This may help you to some extent, but this is mostly about EVB boards
that use the d-bug12 monitor:
http://www.ericengler.com/downloads/intro.txt
> I prefered the hcs12 to the 56800 hybrid DSP-microcontroller
because I though there was more info available related to hcs12.
These devices are quite different from DSP devices. These are the
classical microcontrollers. If you don't need DSP functionality then
these devices are probably best for you.
> am I right? was all the info sold to the books makers or is there
some place I have not searched.
There's a lot of sites you haven't visited, I'm sure! The trick is
knowing what to type in at google to find the right info.
You can describe your application here if you want more advice from
others. It's too hard to give you advice if we don't know what you'd
like to do.
By the way, most of us are not Freescale employees, in case it's not
obvious to you. But there are sometimes Freescale employees that post
here.
Eric
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )