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Description
Receive binary data from a serial port.
Syntax
COMM_Recv(hComm, NBytes, VariableBuffer)
Returns
None
Parameters
Name |
Type |
Optional |
Meaning |
hComm |
Number |
No |
File number used by the COMM_OPEN statement to open the communications port. |
NBytes |
Number |
No |
The number of bytes to read from the open port. |
VariableBuffer |
Variable |
No |
A single string variable that will hold the received data from the serial port. |
Remarks
Retrieve the NBytes number of bytes from hComm, placing the results in VariableBuffer.
Program execution will halt until NBytes bytes are available, so it is wise to check how many bytes are available before using this function.
You can do this by checking the %COMM_RXQUE value with the COMM_Get function like the following example:
NBytes = COMM_Get(hComm, %COMM_RXQUE).
Restrictions
See also
Examples
