Which Communication protocol to use
Hello,
I want to communicate between two pic chip. I would like to know which command to use that create the most stable and reliable wired connection.
I am not sure which one to use between Serout, Serout2, Hserout, I2C ...
Can somebody suggest me one, and possibly the receiving pic can send back a validation number to confirm it has received all the information.
Also does someone has an example of this ?
thanks
K
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Re: Which Communication protocol to use
I would go with HSERIN/HSEROUT, then you can use interrupts.
http://www.picbasic.co.uk/forum/show...097#post107097
Dave
Always wear safety glasses while programming.
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Re: Which Communication protocol to use
Great thanks
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Re: Which Communication protocol to use
A lot of I2C techniques discussed recently in this thread:
http://www.picbasic.co.uk/forum/showthread.php?t=10141
Robert
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Re: Which Communication protocol to use
If absolute reliability is required, then some type of error detection and/or correction should be used. ALL physical interface types are prone to an error every now and then. Choice of method depends on what overhead you are prepared to pay. A Hamming code generator is fairly easy to implement, but cuts your thoughput in half. More common is CRC which for relatively low computational overhead is very good at detecting errors so you can ask for a retransmission. Simplest is a checksum. Or send things twice and compare received results... lots of ways to get around errors, so just pick a convenient protocol for other reasons like how far you want to send data, how much bandwidth is available, etc.
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Re: Which Communication protocol to use
Yup, and checksum does not have to be nasa-type complexity either.
There are simple techniques on google (maybe even on these forums).
Robert
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