Tektronix MTD200, Руководство пользователя

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Remote Control
5–68
MTD200 MPEG Test Decoder User Manual
Program Example
The example illustrates programming of the device and may be used as a basis
for solving more complex programming problems.
The use of baud rates of less that 9600 requires special measures to avoid loss of
data.
The RS-232 interface with the controller needs to be rated for these baud
rates.
The controller must be able to process the received data in time.
To synchronize data transmission, hardware handshaking must be used.
The connection between the MTD200 and the controller must be made using
a null modem cable.
Follow the instructions that are supplied with your RS-232 control program.
The programming language is Borland C. The serial interface is supported by the
program packet “V.24 Tools Plus” from Langner GmbH.
Table 5–19: Definitions of Library Calls
Function Definitions
v24open
v24setparams
v24sethandshake
v24settimeout
v24setbuffer
v24flush These functions initialize the serial interface.
v24puts This function outputs a string to the serial interface. This string is not
automatically terminated with CR/LF.
v24gets This function reads a string from the serial interface.
v24read This function reads an array of defined length from the serial interface.
General
Definitions of Library
Calls Supporting the V24
Interface