Re: Hardware Abstraction
- From: "Arlet" <usenet+5@xxxxxxxxxxxxxxxxx>
- Date: 28 Nov 2006 05:08:00 -0800
Michael N. Moran wrote:
Vladimir Vassilevsky wrote:
Hello All,
I am looking for a concept for abstracting of a hardware. It is desired
that the concept should be convenient, clear, consistent, logical and
pretty universal.
I find that when abstracting hardware, like any other abstraction,
it is useful and important to separate the construction/initialization
and mode selection from the abstract interface that is used during
most of the application life cycle.
To use a GPIO pin as an example, a bit-banging application can
generally perform two operations:
setHIGH()
setLOW()
The initialization, that selects mutiplexed function routing,
direction, open-drain operation and other configuration belongs
to another interface that is most likely not abstract.
What if I need to dynamically change pin properties ? For instance,
bitbanging an I2C port may involve changing SDA/SCL from input to
output on some architectures.
What if 8 of those GPIO pins are available on the same port, and I need
to access them simultaneously, for instance to access an 8 bit
peripheral ?
What if precise timing is required, for instance bitbanging a UART
peripheral ?
Frankly, I don't see where providing an abstraction for a single GPIO
pin is going to make life easier. There are just too many variations in
hardware capabilities, and application requirements. Even if you could
design a model, it would probably be slow and bloated, and a much
bigger hassle than just accessing the hardware ports directly.
.
- Follow-Ups:
- Re: Hardware Abstraction
- From: Rocky
- Re: Hardware Abstraction
- References:
- Hardware Abstraction
- From: Vladimir Vassilevsky
- Re: Hardware Abstraction
- From: Michael N. Moran
- Hardware Abstraction
- Prev by Date: Re: which object orient language is most suitable for embedded programming?
- Next by Date: Re: which object orient language is most suitable for embedded programming?
- Previous by thread: Re: Hardware Abstraction
- Next by thread: Re: Hardware Abstraction
- Index(es):
Relevant Pages
|
