.Peekdata Method

Top  Previous  Next

Function:

For the selected serial port (selection is made through ser.num) returns the string that contains the "preview" of the data from the RX buffer. The data is NOT deleted from the buffer.

Syntax:

ser.peekdata(maxinplen as word) as string

Returns:

String containing data from the RX buffer

See Also:

Three Modes of the Serial Port, Receiving data

ser.getdata

 


Part

Description

maxinplen

Maximum amount of data to preview (word).

Details

Length of received data is limited by one of the three factors (whichever is smaller): amount of data in the RX buffer itself, capacity of the "receiving" string variable, and the limit set by the maxinplen argument.

String variables can hold up to 255 bytes of data, so this method will only allow you to preview up to 255 "next" bytes from the RX buffer.

In the UART mode (ser.mode= 0- PL_SER_MODE_UART) the data is received "as is". For Wiegand and clock/data mode (ser.mode= 1- PL_SER_MODE_WIEGAND and ser.mode= 2- PL_SER_MODE_CLOCKDATA) each data character represents one data bit and only two characters are possible: '0' or '1'.