UM0239 datasheet(36/44 Pages) STMICROELECTRONICS

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Communication session examples

UM0239

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Communication session examples

This sections provides examples of some of the most common operations that can be

performed with two or more Demo Boards. The operations performed are:

●

Communication session without Frame Synchronization

●

Communication session with Software Frame Synchronization

●

Communication session with ST7540 Frame Synchronization

●

Ping session

8.1

Setup procedure

8.1.1

Required hardware

The following hardware is required for these example sessions:

●

Two

EVALCOMMBOARD rev. 1.1 + EVALST7540-1 rev. 2.1 (76 kHz)

●

One PC with two RS-232 ports

8.1.2

Hardware setup

The setup of the communication sessions is common for all tests.

Connect the PLM Demo Boards to the

EVALCOMMBOARDs.

Connect the boards to the two RS-232 PC ports through the serial cables to the PC.

Link the PLM Boards to an isolated 110/220V~ Mains voltage.

Finally, reset the two

EVALCOMMBOARDs by pressing the Reset button.

8.1.3

Software setup

To control two devices at the same time, the user must run two sessions of the program:

Open Start, Programs, ST7538_40 FSK Power Line Modem Demo Kit and click

ST7538_40 FSK Power Line Modem Demo Kit.

Then, select the correspondent COM available for every session (in this example

COM1 for the first board and COM3 for the second board); enabling the GUI to

communicate with each

EVAL Board.

Figure 21.

Communication setup: COM selection

COM port selection

STATUS BAR update

TOOLBAR enabled

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