Total number of values read from instrument
值Received
indicates the total number of values read from the instrument. The value is updated after each successful read operation, and is set to0
after thefopen
function is issued. If the terminator is read from the instrument, then this value is reflected by值Received
.
If you are reading data asynchronously, use theBytesAvailable
property to return the number of bytes currently available in the input buffer.
When performing a read operation, the received data is represented by values rather than bytes. A value consists of one or more bytes. For example, oneuint32
value consists of four bytes.
Usage |
Any instrument object |
Read only |
Always |
Data type |
Double |
The default value is0
.
Suppose you create a serial port object on a Windows®machine associated with the serial port COM1.
s = serial('COM1'); fopen(s)
If you write theRS232?
command, and then read back the response usingfscanf
,值Received
is17
because the instrument is configured to send theLF
终结者。
fprintf(s,'RS232?') out = fscanf(s) out = 9600;0;0;NONE;LF s.ValuesReceived ans = 17