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Receiving Data

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WillB97 edited this page Jun 27, 2017 · 1 revision 
poll_COM_port(/*buffer*/, /*length*/)
Buffer
A buffer to store the received data in. This must be a buffer and not a pointer as the function does not allocate memory so will fail if there is not available memory at the address.
Length
The maximum number of bytes to put in the buffer, this must be less than or equal to the size of the buffer.
The function returns the number of bytes received on success and on error a negative error code. As the read function does not wait for data be received this actually just retrieves data from the operating system's buffer.

The library and included programs are licensed under an MIT license so they can be used and modified in any project, public, private and course based, as long as the license header remains.

Welcome

  1. Opening a Serial Port
  2. Closing a Serial Port
  3. Sending Data
  4. Receiving Data
  5. Additional Facilities
  6. Included Programs
    1. tester.c
    2. serTest.c
  7. Operating System Dependent Issues
    1. Linux required access privileges
    2. Windows, accessing serial ports above COM9
    3. Serial buffer overflow
    4. Linux not detecting broken serial port
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