Functions to communicate with the NRF24L01+ (NG) transceiver via SPI. More...

Detailed Description

Functions to communicate with the NRF24L01+ (NG) transceiver via SPI.

Author: Fabian Hüßler fabia.nosp@m.n.hu.nosp@m.essle.nosp@m.r@ov.nosp@m.gu.de

Definition in file nrf24l01p_ng_communication.h.

#include "nrf24l01p_ng.h"

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#define	NRF24L01P_NG_ADDR_MASK (0x1F)
	Mask for 5 bit register address.

#define	NRF24L01P_NG_PIPE_MASK (0x07)
	Mask for 3 bit pipe number.

#define	NRF24L01P_NG_CMD_R_REGISTER(reg) (0x00 \| ((reg) & NRF24L01P_NG_ADDR_MASK))
	Read register value (1 to 5 bytes)

#define	NRF24L01P_NG_CMD_W_REGISTER(reg) (0x20 \| ((reg) & NRF24L01P_NG_ADDR_MASK))
	Write register value (1 to 5 bytes)

#define	NRF24L01P_NG_CMD_R_RX_PAYLOAD (0x61)
	Read RX payload buffer (1 to 32 bytes)

#define	NRF24L01P_NG_CMD_W_TX_PAYLOAD (0xA0)
	Write TX payload buffer (1 to 32 bytes)

#define	NRF24L01P_NG_CMD_FLUSH_TX (0xE1)
	Flush TX buffer (0 bytes data)

#define	NRF24L01P_NG_CMD_FLUSH_RX (0xE2)
	Flush RX buffer (0 bytes data)

#define	NRF24L01P_NG_CMD_REUSE_TX_PL (0xE3)
	Reuse last transmitted payload (0 bytes data)

#define	NRF24L01P_NG_CMD_R_RX_PL_WID (0x60)
	Read RX payload width for the top R_RX_PAYLOAD in RX FIFO (1 byte data)

#define	NRF24L01P_NG_CMD_W_ACK_PAYLOAD(pipe) (0xA8 \| ((pipe) & NRF24L01P_NG_PIPE_MASK))
	Write payload to be transmitted together with ACK for certain pipe (1 to 32 bytes data)

#define	NRF24L01P_NG_CMD_W_TX_PAYLOAD_NO_ACK (0xB0)
	Disable auto ACK on this specific frame.

#define	NRF24L01P_NG_CMD_NOP (0xFF)
	No operation.

void	nrf24l01p_ng_acquire (nrf24l01p_ng_t *dev)
	Acquire the SPI bus of the transceiver. More...

void	nrf24l01p_ng_release (nrf24l01p_ng_t *dev)
	Release the SPI bus of the transceiver. More...

uint8_t	nrf24l01p_ng_read_reg (const nrf24l01p_ng_t dev, uint8_t reg, uint8_t dest, size_t len)
	Read a register value. More...

uint8_t	nrf24l01p_ng_write_reg (const nrf24l01p_ng_t dev, uint8_t reg, const uint8_t src, size_t len)
	Write a register value. More...

uint8_t	nrf24l01p_ng_read_rx_payload (const nrf24l01p_ng_t dev, void dest, size_t len)
	Read received payload. More...

uint8_t	nrf24l01p_ng_write_tx_payload (const nrf24l01p_ng_t dev, const void src, size_t len)
	Write payload to be transmitted. More...

uint8_t	nrf24l01p_ng_flush_tx (const nrf24l01p_ng_t *dev)
	Flush TX FIFO. More...

uint8_t	nrf24l01p_ng_flush_rx (const nrf24l01p_ng_t *dev)
	Flush RX FIFO. More...

uint8_t	nrf24l01p_ng_reuse_tx_pl (const nrf24l01p_ng_t *dev)
	Reuse TX payload in FIFO. More...

uint8_t	nrf24l01p_ng_read_rx_pl_width (const nrf24l01p_ng_t dev, uint8_t dest)
	Read received payload width. More...

uint8_t	nrf24l01p_ng_write_ack_pl (const nrf24l01p_ng_t dev, const void src, size_t len, uint8_t pipe)
	Write Payload to be transmitted in an ACK frame. More...

uint8_t	nrf24l01p_ng_write_tx_pl_no_ack (const nrf24l01p_ng_t dev, const void src, size_t len)
	Write payload to be transmitted but do not expect an ACK for this frame. More...

uint8_t	nrf24l01p_ng_get_status (const nrf24l01p_ng_t *dev)
	Get status register value. More...

Function Documentation

◆ nrf24l01p_ng_acquire()

void nrf24l01p_ng_acquire ( nrf24l01p_ng_t * dev )

Acquire the SPI bus of the transceiver.

Parameters

[in] dev NRF24L01+ device handle

◆ nrf24l01p_ng_flush_rx()

uint8_t nrf24l01p_ng_flush_rx ( const nrf24l01p_ng_t * dev )

Flush RX FIFO.

Parameters

[in] dev NRF24L01+ device handle

Returns: Status register value

◆ nrf24l01p_ng_flush_tx()

uint8_t nrf24l01p_ng_flush_tx ( const nrf24l01p_ng_t * dev )

Flush TX FIFO.

Parameters

[in] dev NRF24L01+ device handle

Returns: Status register value

◆ nrf24l01p_ng_get_status()

uint8_t nrf24l01p_ng_get_status ( const nrf24l01p_ng_t * dev )

Get status register value.

Parameters

[in] dev NRF24L01+ device handle

Returns: Status register value

◆ nrf24l01p_ng_read_reg()

uint8_t nrf24l01p_ng_read_reg	(	const nrf24l01p_ng_t *	dev,
		uint8_t	reg,
		uint8_t *	dest,
		size_t	len
	)

Read a register value.

Parameters

[in]	dev	NRF24L01+ device handle
[in]	reg	Register address
[out]	dest	Output register
[in]	len	Output register width

Returns: Status register value

◆ nrf24l01p_ng_read_rx_payload()

uint8_t nrf24l01p_ng_read_rx_payload	(	const nrf24l01p_ng_t *	dev,
		void *	dest,
		size_t	len
	)

Read received payload.

Parameters

[in]	dev	NRF24L01+ device handle
[out]	dest	Output payload buffer
[in]	len	Output payload length

Returns: Status register value

◆ nrf24l01p_ng_read_rx_pl_width()

uint8_t nrf24l01p_ng_read_rx_pl_width	(	const nrf24l01p_ng_t *	dev,
		uint8_t *	dest
	)

Read received payload width.

Parameters

[in]	dev	NRF24L01+ device handle
[out]	dest	Payload width

Returns: Status register value

◆ nrf24l01p_ng_release()

void nrf24l01p_ng_release ( nrf24l01p_ng_t * dev )

Release the SPI bus of the transceiver.

Parameters

[in] dev NRF24L01+ device handle

◆ nrf24l01p_ng_reuse_tx_pl()

uint8_t nrf24l01p_ng_reuse_tx_pl ( const nrf24l01p_ng_t * dev )

Reuse TX payload in FIFO.

This function can be used to reattempt to transmit a frame, after a MAX_RT interrupt was triggered.

Parameters

[in] dev NRF24L01+ device handle

Returns: Status register value

◆ nrf24l01p_ng_write_ack_pl()

uint8_t nrf24l01p_ng_write_ack_pl	(	const nrf24l01p_ng_t *	dev,
		const void *	src,
		size_t	len,
		uint8_t	pipe
	)

Write Payload to be transmitted in an ACK frame.

Parameters

[in]	dev	NRF24L01+ device handle
[in]	src	Input payload buffer
[in]	len	Input payload length
[in]	pipe	Index of data pipe

Returns: Status register value

◆ nrf24l01p_ng_write_reg()

uint8_t nrf24l01p_ng_write_reg	(	const nrf24l01p_ng_t *	dev,
		uint8_t	reg,
		const uint8_t *	src,
		size_t	len
	)

Write a register value.

Parameters

[in]	dev	NRF24L01+ device handle
[in]	reg	Register address
[in]	src	Data to be written into the register
[in]	len	Register width

Returns: Status register value

◆ nrf24l01p_ng_write_tx_payload()

uint8_t nrf24l01p_ng_write_tx_payload	(	const nrf24l01p_ng_t *	dev,
		const void *	src,
		size_t	len
	)

Write payload to be transmitted.

Parameters

[in]	dev	NRF24L01+ device handle
[in]	src	Input payload buffer
[in]	len	Input payload length

Returns: Status register value

◆ nrf24l01p_ng_write_tx_pl_no_ack()

uint8_t nrf24l01p_ng_write_tx_pl_no_ack	(	const nrf24l01p_ng_t *	dev,
		const void *	src,
		size_t	len
	)

Write payload to be transmitted but do not expect an ACK for this frame.

Parameters

[in]	dev	NRF24L01+ device handle
[in]	src	Input payload buffer
[in]	len	Input payload length

Returns: Status register value