Re: [Amforth] MSP430 choices

[Tristan Williams]

On 13Jul17 09:50, Atommann wrote:
> Hi Tristan,
> 
> 2017-06-26 19:36 GMT+08:00 Tristan Williams :
> > Thank you.
> >
> > The small project I had in mind needs little in terms of resources. In
> > my perfect world there would be an 8 pin DIP microprocessor capable of
> > running AmForth :) I was hoping that, despite my failure to find it,
> > there existed a 14 pin DIP MSP430 with the necessary resources to run
> > AmForth. I am not sure that 20 pins is sufficiently fewer than the 28
> > of a 328p to make a difference for my case.
> >
> > You are 100% correct to point out that there is a wealth of available
> > boards. I forget this all too often in my enthusiasm to make something.
> 
> I think you should give SMD a try.
> 
> The QFN AVR's are really very small.
> On soldering, you first tin the pads for the IC, then apply some flux
> and use hot air to solder the IC. The surface tension of the tin will
> pull the IC to its correct position.
> There are lots of youtube videos about how to solder SMDs.
> If you want to order custom PCBs,you can oder them from China, they are cheap.
> 
> -- 
> Best regards,
> Atommann

Hello Atommann,

I did give SMD a try, though by drag soldering rather than hot air. It
worked very well for me, so I shall continue along this route, rather
than looking for a smaller PTH part.   

Kind regards and thanks,
Tristan


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Re: [Amforth] MSP430 choices

[Atommann]

Hi Tristan,

2017-06-26 19:36 GMT+08:00 Tristan Williams :
> Thank you.
>
> The small project I had in mind needs little in terms of resources. In
> my perfect world there would be an 8 pin DIP microprocessor capable of
> running AmForth :) I was hoping that, despite my failure to find it,
> there existed a 14 pin DIP MSP430 with the necessary resources to run
> AmForth. I am not sure that 20 pins is sufficiently fewer than the 28
> of a 328p to make a difference for my case.
>
> You are 100% correct to point out that there is a wealth of available
> boards. I forget this all too often in my enthusiasm to make something.

I think you should give SMD a try.

The QFN AVR's are really very small.
On soldering, you first tin the pads for the IC, then apply some flux
and use hot air to solder the IC. The surface tension of the tin will
pull the IC to its correct position.
There are lots of youtube videos about how to solder SMDs.
If you want to order custom PCBs,you can oder them from China, they are cheap.

-- 
Best regards,
Atommann

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Re: [Amforth] MSP430 choices

[Tristan Williams]

On 26Jun17 20:33, Matthias Trute wrote:
> Am Montag, den 26.06.2017, 12:36 +0100 schrieb Tristan Williams:
> > Thank you.??
> > 
> > The small project I had in mind needs little in terms of resources.
> > In
> > my perfect world there would be an 8 pin DIP microprocessor capable
> > of
> > running AmForth :)
> 
> Well, 2 pins for power and ground, two for the commandline. Probably
> other one (two) for the external oszillator. That does'nt leave that
> much for the application. On the other hand an I2C bus can address many
> devices with 2 pins.

Directing I2C devices is at heart of it, though my ideal eight pins
would still be a squeeze. Back to the 328p.

Tristan
   


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Re: [Amforth] MSP430 choices

[Tristan Williams]

Thank you. 

The small project I had in mind needs little in terms of resources. In
my perfect world there would be an 8 pin DIP microprocessor capable of
running AmForth :) I was hoping that, despite my failure to find it,
there existed a 14 pin DIP MSP430 with the necessary resources to run
AmForth. I am not sure that 20 pins is sufficiently fewer than the 28
of a 328p to make a difference for my case.

You are 100% correct to point out that there is a wealth of available
boards. I forget this all too often in my enthusiasm to make something.
 
Tristan


On 25Jun17 11:18, Matthias Trute wrote:
> Hi Tristan,
> 
> > I have been enjoying using AmForth on AVR hardware but have a project
> > in which I would like to use a physically smaller processor than a
> > AtMega328p 28 pin DIP. Before thinking about SMD I wondered if there
> > was a smaller DIP packaged processor that would run AmForth in the
> > MSP430 family?
> > 
> > Am I correct in thinking that the lowest pin count MSP430 device that
> > can run AmForth would be a 20 pin one (such as MSP430G2x52)?
> 
> I use the G2553 as the primary MSP430 target, leaving 8KB code space??
> for user programs. All other devices with more ressources are either
> PDIP40 (the bigger AVR's) or SMD. There are so many ready-to-run boards
> available today... Even small ones like the arduino nano. I've never
> even tried to solder SMD devices myself.
> 
> Matthias
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