How Can I Send Data Stored In 8 Bits In 5 Bits

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VS2008

C++

Presently data is going serially in the form of 8 bits now i want to send it on 5 bits on 50 bps

Posted 13-Nov-14 0:21am

Prerna_Sharma

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OriginalGriff · Answer 1 · 2014-11-13T00:30:00

That's complicated: if you mean you want to send 5 bits per character as text-type data, then look at using Base64[^] - depending on what your framework is, there are various ways to convert to / from base64:

Google: Base64[^]
If you apop uses the .NET framework, then these are available:
Convert.ToBase64[^]
Convert.FromBase64[^]

Orjan Westin · Answer 2 · 2014-11-13T00:52:00

As Griff says, go for the principle of Base64. Note that this is a method for transposing an array of 8-bit characters into an array of 6-bit characters, so you will have to implement your own solution to transpose into 5-bit characters.

Simply put, you take five 8-bit characters, put them together in one integer of sufficient length (e.g. at least 40 bits, which effectively means a 64-bit integer) and read out five bits at a time, to form eight 5-bit characters. On the other end, you reverse the process.

Now, as for how to transfer 5-bit characters at 50 bps, that depends entirely on the operating system, and the serial hardware. There are limitations in what various UARTs and other communication chips accept.

How Can I Send Data Stored In 8 Bits In 5 Bits

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