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使用PIC16C5X单片机解码红外遥控器

资料介绍
For many years the consumer electronics industry has
been employing infrared remote controls for the control
of televisions, VCR’s, and cable boxes. This same tech-
nology has recently started to appear in industrial appli-
cations to eliminate keypads.
Decoding most of the infrared signals can be easily
handled by PIC16C5X microcontrollers. This applica-
tion note describes how this decoding may be done.
The only mandatory hardware for decoding IR signals
is an infrared receiver. The use of two types is
described here. Both are modular types used often by
the consumer electronics industry. The first type
responds to infrared signals modulated at about
40 kHz. The second responds to non-modulated infra-
red pulses and has a restricted range. The hardware
costs of each approach will be less than two dollars.
Three PIC16C5X application programs are described,
and instructions on how they can be used to create an
algorithm that can decode just about any remote con-
trol signal. Each PIC16C5X application program repre-
sents a step in mapping out a pre-existing infrared
format. The final application is a fully implemented
example of decoding and interpreting the infrared sig-
nals of a type of Teknika TV remote.
AN657
Decoding Infrared Remote Controls Using a PIC16C5X Microcontroller

The modulation layer refers to the fact that each burst
Author: William G. Grimm of infrared signal is often modulated at a frequency
Consultant between 32.75 kHz and 56.8 kHz. This is done to
diminish the effects of ambient light. This layer, how-
ever, is optional. Some infrared formats do not modu-
INTRODUCTION
使用PIC16C5X单片机解码红外遥控器
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