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'[EE] Hitach uC'
2005\08\22@101959 by Daniel Chia

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Hi,
       I was just wondering, has anyone used the hitachi H8S/2633R or
similar? Any comments on this chip?

       I'm currently toying with using the brains for my next
micromouse due mainly to the following reasons:

Ability to interface with external ram

The timer pulse counter can be used to help me do quadrature decoding on
two motors.

Hardware multiply and divide

Availability of open source C compiler

Comments anyone?

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Daniel Chia

"Genius is one percent inspiration and ninety-nine percent
perspiration."

    - Thomas Edison

E-mail: spam_OUTdanielcjhTakeThisOuTspamyahoo.com.sg
MSN: .....danstryder01KILLspamspam@spam@yahoo.com.sg
ICQ: 37878331
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2005\08\24@035748 by Chen Xiao Fan

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It seems to me Hitachi MCU (now Renesas) is quite popular
in the robotics world. I do not know why since I never used
any H8. Reason 1 rules out dsPIC. Reason 4 rules out Renesas
M16C. Still I think there are ARM based MCUs which does
fulfill all the conditions.

I am not so sure about H8 but in general I do not quite
like Japanese MCU vendors since the documentation is quite
bad in general and the development tools are really expensive.
The third-party support is also not very good. We used to
use NEC MCUs (NEC 17k 4-bit) and the ICE was about US$5000.
We just throw them away (2 x US$5000) quite recently. They
are going to obsolete the product anyway.

Regards,
Xiaofan

{Original Message removed}

2005\08\24@044500 by Daniel Chia

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Hi,
 Actually M16C has an open source port of gcc i
think. And indeed the CPU does seem to have a lack of
documentation however at this time I haven't found a
better alternative.

--- Chen Xiao Fan <xiaofanspamKILLspamsg.pepperl-fuchs.com>
wrote:

{Quote hidden}

> {Original Message removed}

2005\08\24@092408 by Mike Hord

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> It seems to me Hitachi MCU (now Renesas) is quite popular
> in the robotics world. I do not know why since I never used
> any H8.

Doesn't the Lego Mindstorms controller use a Hitachi chip?

Mike H.

2005\08\24@103245 by olin piclist

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Mike Hord wrote:
> Doesn't the Lego Mindstorms controller use a Hitachi chip?

Yes it does, but Lego doesn't let you at it directly with their software.
There are probably Mindstorm inthusiasts out there that have web pages
explaining how to get at it though.

Mindstorm is really intended for kids to learn, and it does a great job of
it.  For three years we sponsored a First Lego League robotics team.  Seeing
the robot do stuff made the kids willing to sit down and learn how to
program it.  At first we used the RoboLab software, which is based on
LabView.  It got the kids going the first year.  The last two years I made
them learn Mindscript, which is a text based language.  There was some
kicking and screaming at first, but once they got past the hump they
preferred Mindscript over RoboLab.

In the first year we won the first place performance award at the Rhode
Island state tournament and the second your the software award at the
Massachusetts state tournament.  The third year we won the first place
performance award at the New Hampshire state tournament out of over 100
teams that entered the NH system.


*****************************************************************
Embed Inc, embedded system specialists in Littleton Massachusetts
(978) 742-9014, http://www.embedinc.com

2005\08\24@210037 by Chen Xiao Fan

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Actually those Robots are very tempting even for adults. It is
just that my wife does not allow me to buy. :(

My brother also almost bought it back when he was a Mechanical
engineer. Now he is developing sound card software for Creative
and Robotics is out of his interests.

By the way, Daniel (the OP) is a Junior College student (similar to
high school in the States). He is very bright young man and
he wrote the first dsPIC bootloader last year based on Tiny
Bootloader 18F which was released to the public recently.

The URL for the download link is as following.
http://www.beaglerobotics.com/community


Regards,
Xiaofan

{Original Message removed}

2005\08\29@145609 by alan smith

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FYI...Mindstorm was developed by Visionary Products  (http://www.visionaryproducts.com)

Olin Lathrop <.....olin_piclistKILLspamspam.....embedinc.com> wrote:Mike Hord wrote:
> Doesn't the Lego Mindstorms controller use a Hitachi chip?

Yes it does, but Lego doesn't let you at it directly with their software.
There are probably Mindstorm inthusiasts out there that have web pages
explaining how to get at it though.

Mindstorm is really intended for kids to learn, and it does a great job of
it. For three years we sponsored a First Lego League robotics team. Seeing
the robot do stuff made the kids willing to sit down and learn how to
program it. At first we used the RoboLab software, which is based on
LabView. It got the kids going the first year. The last two years I made
them learn Mindscript, which is a text based language. There was some
kicking and screaming at first, but once they got past the hump they
preferred Mindscript over RoboLab.

In the first year we won the first place performance award at the Rhode
Island state tournament and the second your the software award at the
Massachusetts state tournament. The third year we won the first place
performance award at the New Hampshire state tournament out of over 100
teams that entered the NH system.


*****************************************************************
Embed Inc, embedded system specialists in Littleton Massachusetts
(978) 742-9014, http://www.embedinc.com

2005\08\31@002429 by Chen Xiao Fan

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I checked last year and found no GCC port for M16C. However you are
absolutely correct now. It is really new!

Regards,
Xiaofan

http://gcc.gnu.org/

News/Announcements
August 22, 2005
Red Hat Inc has contributed a port for the MorphoSys family.
July 20, 2005
Red Hat Inc has contributed a port for the Renesas R8C/M16C/M32C families.
July 17, 2005
GCC 4.1 stage 2 has been closed. ...
July 7, 2005
GCC 4.0.1 has been released.  

-----Original Message-----
From: Daniel Chia
Sent: Wednesday, August 24, 2005 4:45 PM
To: Microcontroller discussion list - Public.
Subject: RE: [EE] Hitach uC

Hi,
 Actually M16C has an open source port of gcc i
think. And indeed the CPU does seem to have a lack of
documentation however at this time I haven't found a
better alternative.


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