Andy Sinclair wrote:


> 
> I have a Freescale HCS12X demo board on my desk which has a P&E BDM
> built in and is only $85 from digikey (DEMO9S12XDT512).
> 

By working with the MCU I mean working on the real device. To do that, 
one needs a standalone BDM and a software to it at the least. Playing 
with the eval board is worseless. The eval board can be interesting only 
as a reference design.

Vladimir Vassilevsky

DSP and Mixed Signal Design Consultant

http://www.abvolt.com

"Vladimir Vassilevsky" <a...@hotmail.com> a écrit dans le message 
de news: NBBEh.1750$j...@newssvr25.news.prodigy.net...
>
>
> Andy Sinclair wrote:
>
>
>>
>> I have a Freescale HCS12X demo board on my desk which has a P&E BDM
>> built in and is only $85 from digikey (DEMO9S12XDT512).
>>
>
> By working with the MCU I mean working on the real device. To do that, one 
> needs a standalone BDM and a software to it at the least. Playing with the 
> eval board is worseless. The eval board can be interesting only as a 
> reference design.
>
> Vladimir Vassilevsky
>
> DSP and Mixed Signal Design Consultant
>
> http://www.abvolt.com




Hi,
Several eval boards (9S08QG8, 9SGB60 for example) contains a 6 pins 
connector to program / debug an external target just by adding a 6 net 
wires.
It work with 9s08 and 9s12.

Yvan

**********************
  http://www.ybdesign.fr
********************** 

Vladimir Vassilevsky wrote:
>> I have a Freescale HCS12X demo board on my desk which has a P&E BDM
>> built in and is only $85 from digikey (DEMO9S12XDT512).
>> 
>
>By working with the MCU I mean working on the real device. To do that, 
>one needs a standalone BDM and a software to it at the least. Playing 
>with the eval board is worseless. The eval board can be interesting only 
>as a reference design.

The demo board has an external BDM connector and can be used to
communicate with a standalone device with a small modification.

Andy

On Feb 26, 8:51 am, Vladimir Vassilevsky <antispam_bo...@hotmail.com>
wrote:

> By working with the MCU I mean working on the real device. To do that,
> one needs a standalone BDM and a software to it at the least. Playing
> with the eval board is worseless. The eval board can be interesting only
> as a reference design.

Think again.

If the eval board fits in the box, and costs less than building a
custom one...

;-)

c...@hotmail.com wrote:
> On Feb 22, 9:37 am, David Kelly <n...@Yahoo.com> wrote:
> 
>> Suggest you concentrate less on "learning HC12" and more on learning how
>> to solve problems with a microcontroller. Then in the future you will be
>> prepared for the toughest and riskiest part of the design process:
>> defining your requirements and shopping for solutions. If every problem
>> looks like an HC12 solution, or PIC, or AVR, then you are not really
>> giving others a fair shake.
> 
> Since when is it an engineer's or hobbyists job to give manufacturer's
> a fair shake?

Because that is EXACTLY your job, to have an open mind to all solutions. 
In a free-market economy this is everyone's job.

For example, I have need of connecting a couple of digital inputs to a 
legacy application. Pressing two keys on a keyboard would suffice. So in 
the short term I'm going to modify USB keyboards as a 2nd USB keyboard 
usually works in parallel on both Mac and PC.

In opening USB keyboards I may find a readily available USB keyboard 
chip that could be used beyond the prototype stage. Else I'll have to 
make something.

Usually an AVR is the quickest thing I can program and debug. But Atmel 
isn't there yet with USB AVRs that debug with plain JTAG ICE or Dragon. 
I no longer have a JTAG ICE mkII. And $15 qty 1 DigiKey price for 
AT90USB shipping chips is not attractive. AVR isn't there yet and its 
not my job to bend over backwards making it so.

I have an HC08 USB kit which needs to be considered.

Lots of USB on ARM. Maybe I need to make an ARM-based 2-key keyboard?  :-)

Anyone hack a USB mouse microcontroller? Would like to use the mouse 
buttons but they can't be seen as mouse buttons to the host computer OS.

On Feb 27, 12:08 pm, David Kelly <n...@Yahoo.com> wrote:

> > Since when is it an engineer's or hobbyists job to give manufacturer's
> > a fair shake?
>
> Because that is EXACTLY your job, to have an open mind to all solutions.
> In a free-market economy this is everyone's job.

In business reality, you only have so much time to pick a solution.

Usually, that means that if you find one with no major objections, you
just go with that.

If you don't find one your like, then you carefully survey a few
choices which comes close and pick the one that is least objectionable
in terms of its not meeting your desired learning curve, development
time, tool cost, unit cost, performance, etc...

If you are in a development cost dominated business, you will of
course see things very differently than if you are in a unit cost
dominated business.

>On Feb 27, 12:08 pm, David Kelly <n...@Yahoo.com> wrote:
>
>> > Since when is it an engineer's or hobbyists job to give
manufacturer's
>> > a fair shake?
>>
>> Because that is EXACTLY your job, to have an open mind to all
solutions.
>> In a free-market economy this is everyone's job.
>
>In business reality, you only have so much time to pick a solution.
>
>Usually, that means that if you find one with no major objections, you
>just go with that.
>
>If you don't find one your like, then you carefully survey a few
>choices which comes close and pick the one that is least objectionable
>in terms of its not meeting your desired learning curve, development
>time, tool cost, unit cost, performance, etc...
>
>If you are in a development cost dominated business, you will of
>course see things very differently than if you are in a unit cost
>dominated business.
>
>
>
>

I have been reading, with great interest, this chain which answered many
of my questions. Now, (as somebody was saying in this chain - forget hc12
but concentrate on what you can do), concentrating on list of simple
projects to do - basically to jumpstart - does any one have any step by
step instructions on some of the projects? The first LED blinking will
help me push the supposedly easier part;-)

Thank you.