IRDevice Class

IRDevice Class

Description
A class used for managing, sending, and receiving data using IR (Infra-Red).

Syntax
class IRDevice

Members

Public Constructors 
A public constructor should not be used as this class is intended to be a single class.
Access member functions using the object instance named IR.
Public Methods 
IRDevice::getFreqGet the current IR modulation frequency.
IRDevice::beginAllocate resources and start the IR device with a custom frequency.
IRDevice::endStop the IR device operations and free up resources.
IRDevice::sendSend IR raw data.
IRDevice::beginNECAllocate resources and start the IR device with a frequency suitable for the NEC protocol.
IRDevice::sendNECSend data using the NEC protocol.
IRDevice::recvNECReceive data using the NEC protocol.

IRDevice::getFreq

Description
Get the current IR modulation frequency.

Syntax
uint32_t getFreq(void);

Parameters
NA

Returns
This function returns the IR modulation frequency (in Hz) set currently.

Example Code
NA

Notes and Warnings
“IRDevice.h” must be included to use the class function.

IRDevice::begin

Description
Select IR mode as transmitting or receiving mode on IR transmitting or receiving pin. Allocate resources and start the IR device with a custom frequency.

Syntax
void begin(uint8_t irPin, uint32_t irMode, uint32_t freq);
void begin(uint8_t receivePin, uint8_t transmitPin, uint32_t irMode, uint32_t freq);

Parameters
irPin: define pin for IR receiver and transmitter if irMode == IR_MODE_TX or IR_MODE_RX.
receivePin: Hardware IR receiving pin that connected with the IR Receiver.
transmitPin: Hardware IR transmitting pin that connected with the IR Transmistter.
irMode: set IR transmit or receive mode. (Valid values: IR_MODE_TX and IR_MODE_RX).
freq: modulation frequency for IR signal (in Hz).

Returns
NA

Example Code
NA

Notes and Warnings
IR device can only operate in either transmit or receive mode. “IRDevice.h” must be included to use the class function.

IRDevice::end

Description
Stop the IR device operations and free up resources allocated to the IR transmitting and receiving pins.

Syntax
void end(void);

Parameters
NA

Returns
NA

Example Code
Example: IRSendRaw
(https://github.com/ambiot/ambd_arduino/blob/dev/Arduino_package/hardware/libraries/IRDevice/examples/IRSendRAW/IRSendRAW.ino)

Notes and Warnings
“IRDevice.h” must be included to use the class function.

IRDevice::send

Description
Send data by entering customized IR raw data and data length in IR transmission buffer.

Syntax
void send(const unsigned int buf[ ] , uint16_t len);

Parameters
buf[ ] : IR raw signals (in us) in an array form.
len: total length of the IR raw signal array.

Returns
NA

Example Code
Example: IRSendRaw
(https://github.com/ambiot/ambd_arduino/blob/dev/Arduino_package/hardware/libraries/IRDevice/examples/IRSendRAW/IRSendRAW.ino)

Notes and Warnings
“IRDevice.h” must be included to use the class function. IR Raw Data array contains information in the form of consecutive microseconds (us).
For more details, please refer to: http://www.righto.com/2009/08/multi-protocol-infrared-remote-library.html.

IRDevice::beginNEC

Description
Allocate resources and start the IR device with a frequency suitable for the NEC protocol.

Syntax
void beginNEC(uint8_t receivePin, uint8_t transmitPin, uint32_t irMode);

Parameters
receivePin: Hardware IR receiving pin that connected with the IR Receiver.
transmitPin: Hardware IR transmitting pin that connected with the IR Transmistter.
irMode: transmit or receive mode. (Valid values: IR_MODE_TX and IR_MODE_RX).

Returns
NA

Example Code
Example: IRRecvNEC
(https://github.com/ambiot/ambd_arduino/blob/dev/Arduino_package/hardware/libraries/IRDevice/examples/IRRecvNEC/IRRecvNEC.ino)

Notes and Warnings
“IRDevice.h” must be included to use the class function.
IR device can only operate in either transmit or receive mode. Refer to https://techdocs.altium.com/display/FPGA/NEC+Infrared+Transmission+Protocol for the NEC protocol.

IRDevice::sendNEC

Description
Send data using the NEC protocol.

Syntax
void sendNEC(uint8_t adr, uint8_t cmd);

Parameters
adr: 8-bit NEC address data to be transmit
cmd: 8-bit NEC command data to be transmit

Returns
NA

Example Code
Example: IRSendNEC
(https://github.com/ambiot/ambd_arduino/blob/dev/Arduino_package/hardware/libraries/IRDevice/examples/IRSendNEC/IRSendNEC.ino)

Notes and Warnings
“IRDevice.h” must be included to use the class function.
IR device can only operate in either transmit or receive mode. Refer to https://techdocs.altium.com/display/FPGA/NEC+Infrared+Transmission+Protocol for the NEC protocol.

IRDevice::recvNEC

Description
Receive data using the NEC protocol.

Syntax
void recvNEC(uint8_t& adr, uint8_t& cmd, uint32_t timeout);

Parameters
adr: 8-bit NEC address data to be transmit.
cmd: 8-bit NEC command data to be transmit.
timeout: time duration (in ms) to wait for an incoming transmission.

Returns
This function returns “1” if data has been received, returns “0” if no data has been received.

Example Code
Example: IRRecvNEC
(https://github.com/ambiot/ambd_arduino/blob/dev/Arduino_package/hardware/libraries/IRDevice/examples/IRRecvNEC/IRRecvNEC.ino)

Notes and Warnings
“IRDevice.h” must be included to use the class function.
IR device can only operate in either transmit or receive mode. Refer to https://techdocs.altium.com/display/FPGA/NEC+Infrared+Transmission+Protocol for the NEC protocol.

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