nrf24l01.c File Reference

nRF24L01 handler functions. More...

#include <msp430x44x.h>
#include "nrf24l01.h"
#include "lcd.h"

Include dependency graph for nrf24l01.c:

Go to the source code of this file.

Defines
#define	CSN_TIME   2
#define	CE_HIGH_TIME   10000
Functions
void	Delay (unsigned long a)
	Software delay.
void	CSN_HIGH (void)
	Internally used function to switch /CS line to high.
void	CSN_LOW (void)
	Internally used function to switch /CS line to low.
void	CE_HIGH (void)
	Internal function to enable chip nRF24L01 (switch chip enable line to high).
void	CE_LOW (void)
	Internally used function to disable chip nRF24L01 (switch chip enable line to low).
unsigned char	SPI_SendByte (unsigned char data)
	Internally used function to transmit and receive a byte via SPI channel.
unsigned char	SPI_Send_command_with_ADDR (unsigned char cmd, unsigned char addr, unsigned char data_byte)
	Internally used function to send command to the chip NRF24L01 via SPI.
unsigned char	SPI_Send_command_without_ADDR (unsigned char cmd, unsigned char data_byte)
	Internally used function to send command to the chip NRF24L01 via SPI.
void	NRF_init (void)
	Initialize SPI interface and chip nRF24L01.
void	NRF_send (uint8_t byte)
	Send one byte to the air via chip nRF24L01.
void	NRF_prepareForReceive ()
	After sending a byte you may set the device to RX mode.
bool_t	NRF_receive (uint8_t *const byte)
	Receive one byte from the air via chip nRF24L01.
Variables
unsigned char	RX_ADDRESS_P0 [5] = {5,6,7,8,9}
	Receive the packets with following address.
unsigned char	RX_ADDRESS_P1 [5] = {0,1,2,3,4}
	Receive the packets with following address.
unsigned char	TX_ADDRESS [5] = {5,6,7,8,9}
	Transmit packets with following address.
unsigned char	ADDRESS [5]
unsigned char	status

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Detailed Description

nRF24L01 handler functions.

This is for MOD-NRF24Lx (MOD-NRF24LR or MOD-NRF24LS) extension board. You should connect P3.0 to CSN, P3.1 to MOSI, P3.2 to MISO, P3.3 to CLK and P1.6 to CE using the EXT connector of MSP430-449STK2.

Author:

Peter Ivanov, Olimex Ltd.

Definition in file nrf24l01.c.

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Define Documentation

#define CE_HIGH_TIME   10000

Definition at line 24 of file nrf24l01.c.

#define CSN_TIME   2

Definition at line 23 of file nrf24l01.c.

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Function Documentation

void CE_HIGH

(

void

)

Internal function to enable chip nRF24L01 (switch chip enable line to high).

Definition at line 66 of file nrf24l01.c.

void CE_LOW

(

void

)

[inline]

Internally used function to disable chip nRF24L01 (switch chip enable line to low).

Definition at line 75 of file nrf24l01.c.

void CSN_HIGH

(

void

)

[inline]

Internally used function to switch /CS line to high.

Definition at line 49 of file nrf24l01.c.

void CSN_LOW

(

void

)

Internally used function to switch /CS line to low.

Definition at line 57 of file nrf24l01.c.

void Delay

(

unsigned long

a

)

Software delay.

Parameters:

a

Number of loop.

Definition at line 41 of file nrf24l01.c.

void NRF_init

(

void

)

Initialize SPI interface and chip nRF24L01.

Definition at line 212 of file nrf24l01.c.

void NRF_prepareForReceive

(

)

After sending a byte you may set the device to RX mode.

Definition at line 324 of file nrf24l01.c.

bool_t NRF_receive

(

uint8_t *const

byte

)

Receive one byte from the air via chip nRF24L01.

Addresses are hardcoded:

See also:

RX_ADDRESS_P0 RX_ADDRESS_P1 TX_ADDRESS

Parameters:

byte

The data byte to receive.

Returns:

TRUE: if byte succesfully received. FALSE: if no input data.

Definition at line 340 of file nrf24l01.c.

void NRF_send

(

uint8_t

byte

)

Send one byte to the air via chip nRF24L01.

Addresses are hardcoded:

See also:

RX_ADDRESS_P0 RX_ADDRESS_P1 TX_ADDRESS

Parameters:

byte

The data byte to send.

Definition at line 264 of file nrf24l01.c.

unsigned char SPI_Send_command_with_ADDR	(	unsigned char	cmd,
		unsigned char	addr,
		unsigned char	data_byte
	)

Internally used function to send command to the chip NRF24L01 via SPI.

Parameters:

	cmd	Command to send. Example: R_REGISTER
	addr	Address to send. Example: RX_ADDR_P0
	data_byte	Data byte to send. This data byte will not be sent in some cases! Check source code!

Returns:

Status.

Definition at line 102 of file nrf24l01.c.

unsigned char SPI_Send_command_without_ADDR	(	unsigned char	cmd,
		unsigned char	data_byte
	)

Internally used function to send command to the chip NRF24L01 via SPI.

Parameters:

	cmd	Command to send. Example: R_REGISTER
	data_byte	Data byte to send. This data byte will not be sent in some cases! Check source code!

Returns:

Status.

Definition at line 185 of file nrf24l01.c.

unsigned char SPI_SendByte

(

unsigned char

data

)

Internally used function to transmit and receive a byte via SPI channel.

Parameters:

data

One byte to send.

Returns:

Received byte.

Definition at line 86 of file nrf24l01.c.

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Variable Documentation

unsigned char ADDRESS[5]

Definition at line 32 of file nrf24l01.c.

unsigned char RX_ADDRESS_P0[5] = {5,6,7,8,9}

Receive the packets with following address.

Definition at line 27 of file nrf24l01.c.

unsigned char RX_ADDRESS_P1[5] = {0,1,2,3,4}

Receive the packets with following address.

Definition at line 29 of file nrf24l01.c.

unsigned char status

Definition at line 34 of file nrf24l01.c.

unsigned char TX_ADDRESS[5] = {5,6,7,8,9}

Transmit packets with following address.

Definition at line 31 of file nrf24l01.c.

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