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plurals

PO
primarykey
Id
1203658
data
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0
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CreationDate
2009-07-29T23:33:42.537
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2009-07-29T23:33:42.537
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0
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68204
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1202952
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2
Score
6
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LastEditorDisplayName
text
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A lot of useful information about dealing with serial ports both on PCs and on the device end of the wire can be found at Jan Axelson's site for the book <a href="http://www.lvr.com/serport.htm" rel="nofollow noreferrer">Serial Port Complete</a>. Actual interaction with the port will be highly platform-specific. On *nix of most flavors you open a device named something like <code>/dev/ttya</code> and use <code>read()</code>, <code>write()</code>, and <code>ioctl()</code> to read, write, and configure the port. On Windows, you open a file named <code>COM1</code> (or <code>\\.\COM1</code> on some flavors) with the <code>CreateFile()</code> function, and then get it configured and happy with functions like <a href="http://msdn.microsoft.com/en-us/library/aa363436%28VS.85%29.aspx" rel="nofollow noreferrer"><code>SetCommState()</code></a> and the <code>DCB</code> structure. The details are similar in broad outline to the things you need to do on *nix, but organized completely differently. You can find the whole discussion of configuring and using COM ports at <a href="http://msdn.microsoft.com/en-us/library/aa363196%28VS.85%29.aspx" rel="nofollow noreferrer">MSDN</a>. On the embedded device, you will either be directly accessing the hardware registers of the <a href="http://en.wikipedia.org/wiki/Universal_asynchronous_receiver/transmitter" rel="nofollow noreferrer">UART</a> or interacting with an RTOS. Either way, there is essentially no way to make the code on the device end broadly portable.
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1. PORead data from serial port
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1. PTAnswer
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1. USRBerteig
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