?how to read just single bit for a serial port?

?how to read just single bit for a serial port?

[Jamie]

Hello, 

I've got a problem with reading a single bit from serial port. what
type should I declare to store this? dose the 'character' work?

Re: How to read just single bit for a serial port?

[Jacob Sparre Andersen]

Jamie wrote:

> I've got a problem with reading a single bit from serial port. what
> type should I declare to store this? dose the 'character' work?

You should be able to find the Ada specific part of the
information in chapter 13.5 in the Ada Language Reference
Manual.

Jacob
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N�ste m�de: RPM og dpkg - Hold styr p� dine programmer.
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Re: ?how to read just single bit for a serial port?

[David C. Hoos, Sr.]

Since the physical reads from a serial port
are eight-bit octets, you can declare a type
like this:

type bit is mod 2;
type bit_array is array (natural range 0 .. 7) of bit;

Then instantiate an instance of Unchecked_Conversion
like so:

function to_bits is new Ada.Unchecked_Conversion
  (Source : Character;
   Target : Bit_Array);

Now you can read a character from the port, convert the
character to a bit_array, then select the desired bit
from the array. 
  
----- Original Message ----- 
From: "Jamie" <kz105@student.cs.york.ac.uk>
Newsgroups: comp.lang.ada
To: <comp.lang.ada@ada.eu.org>
Sent: April 14, 2002 9:25 AM
Subject: ?how to read just single bit for a serial port?


> Hello, 
> 
> I've got a problem with reading a single bit from serial port. what
> type should I declare to store this? dose the 'character' work?
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