COMM_Recv

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