MCS3142 datasheet(29/57 Pages) MICROCHIP

29 / 57 page

MCS3142 Dual KEELOQ® Encoder Wireless Remote Control Development Kit User’s Guide

DS40001746A-page 28

 2014 Microchip Technology Inc.

6.3.1

Software Design

The software was written so that a developer can easily use it. All of the KEELOQ

decoding is abstracted away from the developer, leaving the important properties of the

final result to the developer. The following figure shows a top-level diagram of the

software layout.

FIGURE 6-1:

BLOCK DIAGRAM DESIGN OF THE SOFTWARE ON THE TARGET

CONTROLLER

Encoder Mediator

This file contains the place where custom code can be entered after the algorithm is

done checking for a valid response.

EXAMPLE 6-1:

KEELOQ MEDIATOR CODE SNIPPET

if (Decode_Classic_KeeLoq(&inData) != NOT_VALID_PACKET) {

//Custom code to interpret a valid Classic Keeloq Packet.

} else if (Decode_Advanced_KeeLoq(&inData) != NOT_VALID_PACKET) {

//Custom code to interpret a valid Advanced Keeloq Packet.

} else if (Decode_Ultimate_KeeLoq(&inData) != NOT_VALID_PACKET) {

//Custom code to interpret a valid Ultimate Keeloq Packet.

} else {

validated_packet.type = INVALID_ENCODER;

}

MCS3142 Datasheet(PDF) 29 Page - Microchip Technology