NRF24L01 Class Reference

API for the NRF24L01 Transceiver Module. More...

Detailed Description

• ID: nrf24l01
• Name: NRF Transceiver
• Category: wifi
• Manufacturer: seeed sparkfun
• Link: http://www.seeedstudio.com/depot/nRF24L01Module-p-1394.html
• Connection: spi

id This module defines the NRF24L01 interface for libnrf24l01

void
nrf_handler()
{
    std::cout << "Reciever :: " << *((uint32_t*) &(comm.m_rxBuffer[0])) << std::endl;
}

int
main(int argc, char** argv)
{
    comm.setSourceAddress((uint8_t*) local_address);
    comm.setDestinationAddress((uint8_t*) broadcast_address);
    comm.setPayload(MAX_BUFFER);
    comm.configure();
    comm.setSpeedRate(upm::NRF_250KBPS);
    comm.setChannel(99);
    comm.setDataReceivedHandler(nrf_handler);

    signal(SIGINT, sig_handler);

    while (!running) {
        comm.pollListener();
    }

    std::cout << "exiting application" << std::endl;

    return 0;
}

    uint32_t dummyData = 0;
    upm::NRF24L01 comm(7, 8);
    comm.setSourceAddress((uint8_t*) srcAddress);
    comm.setDestinationAddress((uint8_t*) destAddress);
    comm.setPayload(MAX_BUFFER);
    comm.setChannel(99);
    comm.configure();
    comm.setDataReceivedHandler(nrf_handler);

    signal(SIGINT, sig_handler);

    while (!running) {
        memcpy(comm.m_txBuffer, &dummyData, sizeof(dummyData));
        comm.send();
        std::cout << "devi2 :: sending data ...." << dummyData << std::endl;
        upm_delay_us(3000000);
        dummyData += 3000;
    }

    std::cout << "exiting application" << std::endl;

    upm::NRF24L01 sensor(7, 8);
    sensor.setBeaconingMode();

    std::vector<std::string> msgs;

    msgs.push_back("Hello World 1!!!");
    msgs.push_back("Hello World 2!!!");
    msgs.push_back("Hello World 3!!!");
    msgs.push_back("Hello World 4!!!");
    msgs.push_back("Hello World 5!!!");

    signal(SIGINT, sig_handler);

    while (!running) {
        for (std::vector<std::string>::iterator item = msgs.begin(); item != msgs.end(); ++item) {
            std::cout << "BROADCASTING " << (*item).c_str() << std::endl;

            for (int i = 0; i < 3; i++) {
                sensor.sendBeaconingMsg((uint8_t*) (*item).c_str());
                upm_delay_us(1000000);
            }
        }
    }

    std::cout << "exiting application" << std::endl;

    msgs.clear();

Public Member Functions
	NRF24L01 (int cs, int ce)
std::string	name ()
void	init (int chipSelect, int chipEnable)
void	configure ()
void	send (uint8_t *value)
void	send ()
void	setSourceAddress (uint8_t *addr)
void	setDestinationAddress (uint8_t *addr)
void	setBroadcastAddress (uint8_t *addr)
void	setPayload (uint8_t load)
void	setDataReceivedHandler (funcPtrVoidVoid handler)
bool	dataReady ()
bool	dataSending ()
void	getData (uint8_t *data)
uint8_t	getStatus ()
bool	rxFifoEmpty ()
void	rxPowerUp ()
void	rxFlushBuffer ()
void	txPowerUp ()
void	powerDown ()
void	setChannel (uint8_t channel)
void	setPower (power_t power)
uint8_t	setSpeedRate (speed_rate_t rate)
void	txFlushBuffer ()
void	pollListener ()
mraa::Result	ceHigh ()
mraa::Result	ceLow ()
mraa::Result	csOn ()
mraa::Result	csOff ()
void	setBeaconingMode ()
void	sendBeaconingMsg (uint8_t *msg)

Data Fields
uint8_t	m_rxBuffer [MAX_BUFFER]
uint8_t	m_txBuffer [MAX_BUFFER]
uint8_t	m_bleBuffer [32]

Constructor & Destructor Documentation

NRF24L01	(	int	cs,
		int	ce
	)

Instantiates an NRF24l01 object

Parameters

cs	Chip select pin

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Member Function Documentation

std::string name ( )

inline

Returns the name of the component

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void init	(	int	chipSelect,
		int	chipEnable
	)

Initializes needed GPIO pins and SPI

Parameters

chipSelect	Sets up the chip select pin
chipEnable	Sets up the chip enable pin

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void configure

(

)

Configures the NRF24L01 transceiver

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void send

(

uint8_t *

value

)

Sends the buffer data

Parameters

value

Pointer to the buffer

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void send

(

)

Sends the data located in an inner bufer; the user must fill the m_txBuffer buffer

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void setSourceAddress

(

uint8_t *

addr

)

Sets a receiving address of the device

Parameters

addr	5-byte address

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void setDestinationAddress

(

uint8_t *

addr

)

Sets a recipient address. The nrfSend method sends the data buffer to this address

Parameters

addr	5-byte address

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void setBroadcastAddress

(

uint8_t *

addr

)

Sets a broadcasting address

Parameters

addr	5-byte address

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void setPayload

(

uint8_t

load

)

Sets the payload size

Parameters

load	Size of the payload (MAX 32)

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void setDataReceivedHandler

(

funcPtrVoidVoid

handler

)

Sets the handler to be called when data has been received

Parameters

handler

Handler used for callback

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bool dataReady

(

)

Checks if the data has arrived

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bool dataSending

(

)

Checks if the transceiver is in the sending mode

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void getData

(

uint8_t *

data

)

Sinks all the arrived data into a provided buffer

Parameters

data	Pointer to the buffer

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uint8_t getStatus

(

void

)

Checks the transceiver state

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bool rxFifoEmpty

(

)

Checks if the receive stack is empty

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void rxPowerUp

(

)

Powers the receiver up

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void rxFlushBuffer

(

)

Flushes the receive stack

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void txPowerUp

(

)

Powers the transmitter up

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void powerDown

(

)

Powers everything down

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void txFlushBuffer

(

)

Flushes the transmit stack

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void pollListener

(

)

Pulling the method listening for the arrived data, dataRecievedHandler is triggered if data arrives

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mraa::Result ceHigh

(

)

Sets the chip enable pin to HIGH

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mraa::Result ceLow

(

)

Sets the chip enable pin to LOW

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mraa::Result csOn

(

)

Sets the chip select pin to LOW

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mraa::Result csOff

(

)

Sets the chip select pin to HIGH

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void setBeaconingMode

(

)

Configures the NRF24L01 transceiver to behave as a BLE (Bluetooth Low Energy) beaconing devcie.

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void sendBeaconingMsg

(

uint8_t *

msg

)

Beacons the provided message to BLE scanners.

Parameters

msg	Beacons the provided message (max length is 16 bytes)

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Field Documentation

uint8_t m_rxBuffer[MAX_BUFFER]

Receive buffer

uint8_t m_txBuffer[MAX_BUFFER]

Transmit buffer

uint8_t m_bleBuffer[32]

BLE buffer

---

The documentation for this class was generated from the following files:

• src/nrf24l01/nrf24l01.hpp
• src/nrf24l01/nrf24l01.cxx