[Tutor] Re: sending hex data on port

[Lloyd Kvam]

  10001000 = 0x88	(sigh)

Lloyd Kvam wrote:
> To me hex is a way to represent an underlying set of bits
> 00011000 = 0x18
> 10001000 = 0x44
> 
> You are trying to write a hex 18 over a serial port.  Does that mean
> you want to write a '1' followed by a '8'  That is a character one (hex 49)
> followed by an 8 (hex 48)?
> 
> If you are trying to write some bits that have the hex value 18, then you
> are probably want to write the character represented by 00011000.  Those
> bits equal 24 in base 10.  The matching character is chr(24).
> 
> What module are you using?  Does it make sense to say port.write(chr(24))?
> 
> 
> vicki@stanfield.net wrote:
> 
>> On Wed, 18 Jun 2003 12:20:07 -0700, Neil Schemenauer
>> wrote:
>>
>>
>>> I think you are confused about the difference between
>>> numbers and
>>> strings.  The hex() builtin requires an integer as an
>>> argument.  '18' is
>>> a string.  You really need to be more specific as to
>>> what you want to
>>> do.  '18' could be interpreted as a number in base 10
>>> or in base 16 or
>>> in lots of other ways.  For example, if the value you
>>> have is '1829',
>>> what are the characters you want to write to port?
>>>
>>>  Neil
>>
>>
>>
>> Yes, I am. I really just need to pass over the serial
>> port a hex 18 (0x18) and then a hex 0B (0x0B) and then
>> a hex 1D (0x1D). I am obtaining return values each time
>> via the same serial connection. I appreciate your help.
>> --vicki
>>
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> 
> 


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Lloyd Kvam
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