How to correctly receive data from the com port?

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Nikolay Zhivotenko2015-09-05 15:41:15

Programming

Nikolay Zhivotenko, 2015-09-05 15:41:15

The laboratory has a Belarusian device MNIPI E7-20 (Immittance meter). The instrument communicates with the PC via the RS-232C interface. And is in a state of continuous data transmission. Those. every (different in size) period of time, it sends a packet of 22 bytes to the port. Each packet starts with a sync byte - 0xAA.
In addition, due to errors, the device can "eat" part of the data packet and send it to the port.
The operation of the device looks like:

SUBZH: How to properly organize data reception? How can I make the program wait for the synchronization byte, and immediately after it read the data packet?

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Armenian Radio, 2015-09-05
@gbg

Correctly read data from the port into the buffer, and then asynchronously look for the beginning and end of the packets.