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Date: Wed, 27 Aug 2014 08:44:41 -0700 (PDT)
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Subject: Re: STM32F4 Discovery, communication and libraries
From: Roy Emmerich <roy.emmerich@gmail.com>
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Date: 2014-08-27T08:44:41-07:00
List-Id: <comp.lang.ada>

Hi Dennis,

Thanks for your reply. I'm curious to know how/why you opted for your messa=
ge not to be archived on this forum?

> Do you have any experience with assembler (any) -- since so much of C
> mapped to the PDP series instruction set (pre/post increment/decrement
> operators, for example).

Unfortunately I don't have any assembler experience. It strikes me as even =
more hairy than C! Something left to those forced to do it under duress or =
the few for whom this excites. If I had to ever programme in Assembler I wo=
uld want to keep it to the absolute, absolute minimum. Dare I ask you to re=
commended some learning materials?

> If you are familiar with Java AND with disciplined software
> development, a copy of the K&R book for C should be all you need to learn
> the language itself.

Thanks for this tip. I think I will start learning it again as I have the h=
unch it'll be impossible to avoid entirely :)
=20
> >3. www.eluaproject.net
>=20
> 	Based on LUA?, probably interpreted.

Yes it is based on LUA and it looks interpreted. I have played with this th=
e least.

> 	I suspect a lot of those are being developed by companies for
> proprietary products, possibly using some internal core "OS" for
> interfacing between application code and the board support layer. As a
> result, even if one got their hands on the driver source, one would have =
to
> replicate the OS environment to make use of it. At work, I believe the
> common route is to use IOCTL() calls to manipulate the hardware specific
> drivers, leaving a common POSIX (?) interface to C, and wrapping the C
> calls for Ada (if not directly wrapping the assembler entry point to the
> same functionality).

Ummm I think I understood you...

All 3 of the projects I listed are using the STM32F4 direct, without any OS=
. The chip was released with a bunch of C drivers to access I/O and the var=
ious on-board peripherals (i.e. in the chip). You can take a look at them h=
ere:

https://github.com/espruino/Espruino/tree/master/targetlibs/stm32f4/lib

Regards
Roy
---
www.infinitefingers.com