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STM32L4红外发射接收资料

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Implementation of transmitters and receivers
for infrared remote control protocols with STM32Cube

Infrared radiation is the region of the electromagnetic spectrum that lies between microwaves and visible light.
Infrared radiation has two ranges. Near infrared light is closest in wavelength to visible light, while far infrared is closer to the microwave region of the electromagnetic spectrum.
The shorter waves are the ones used by remote controls. Information is transmitted and received using electromagnetic energy, without using wires.
Infrared technology offers important advantages as a form of wireless communication. Nowadays, almost all audio and video equipment can be controlled using an infrared remote control. At the receiving end, a receiver detects the light pulses, which are processed to retrieve/decode the information they contain.
There are many popular infrared protocol standards used to transmit data via infrared light, such as (among others) RC5 and SIRC.

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AN4834

Application note

Implementation of transmitters and receivers

for infrared remote control protocols with STM32Cube

Introduction

Infrared radiation is the region of the electromagnetic spectrum that lies between

microwaves and visible light.

Infrared radiation has two ranges. Near infrared light is closest in wavelength to visible light,

while far infrared is closer to the microwave region of the electromagnetic spectrum.

The shorter waves are the ones used by remote controls. Information is transmitted and

received using electromagnetic energy, without using wires.

Infrared technology offers important advantages as a form of wireless communication.

Nowadays, almost all audio and video equipment can be controlled using an infrared remote

control. At the receiving end, a receiver detects the light pulses, which are processed to

retrieve/decode the information they contain.

There are many popular infrared protocol standards used to transmit data via infrared light,

such as (among others) RC5 and SIRC.

The purpose of this application note is to provide a generic solution for implementing an IR

transmitter (a remote control device) and receiver using microcontrollers of the STM32F0,

STM32F3 and STM32L4 series. An example of software implementation is provided for

RC5 and SIRC protocols. Other protocols are supported and available upon request (for

further information contact your local STMicroelectronics sales office).

The infrared transmitter and receiver solutions described in this document are implemented

using STM32Cube hardware abstraction layer and the X-CUBE-IRREMOTE firmware

package, available on www.st.com.

Note:

Although STM32L4xx MCUs feature the IRTIM, the STM32L476G-EVAL board is not

equipped with the necessary IR components. The X-CUBE-IRREMOTE therefore does not

support this EVAL board.

March 2016

DocID029012 Rev 1

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