Controlling Serial Plix with a Domino

	AN514
	Product: Serial Plix
Controlling Serial Plix with a Domino	Date: 4/11/00
Introduction: This application note demonstrates how to control Serial Plix with a Domino 1 or 2 micro-controller.
Background: The Serial Plix is an 18-pin CMOS chip, which provides an intelligent communication interface between a serial port and X-10 AC power-line control modules. Using our example software and a TW523 power-line adapter module, you'll see how easy it is to remotely control appliances and lights through the power lines.
How it works: Serial Plix removes the burden of complex X-10 programming protocol from the designer by providing a simple serial interface. It takes care of the complex zero-crossing timing for sending and receiving X-10 commands so you don't have to. An otherwise simple embedded controller can now also feature X-10 power-line control by simply adding a Serial Plix chip to the design. The following schematic demonstrates all of the connections needed.
Program Listing: 10 REM * This program demonstrates how to control 20 REM * Serial Plix with the Domino. 30 REM * Setting up and starting the processors real time clock. 40 REM * This is to set a delay before sending the Serial Plix it's 50 REM * next command. 60 TIME=0 : CLOCK 1 70 REM * Sending the ASCII command to turn Unit A16 on. 80 REM * Please note the comma at the end of the PRINT statement 90 REM * is to stop the Domino from printing a carriage return/linefeed. 100 PRINT "$UONA1602", 110 REM * Delay the program to give Serial Plix tme to complete it's task. 120 IF TIME<5 THEN 120 130 REM * Sending the ASCII command to dim unit A16 140 PRINT "$DIMA1615", 150 IF TIME<25 THEN 150 160 REM * Sending the ASCII command to brighten Unit A16. 170 PRINT "$BRTA1615", 180 IF TIME<45 THEN 180 190 REM * Sending the ASCII command to turn off Unit A16. 200 PRINT "$OFFA1602", 210 REM * Delay the loop before the program starts over. 220 IF TIME<50 THEN 220 230 REM * Shutting down the processors real time clock 240 CLOCK 0 250 GOTO 60