Diff: nRF24L01P_Maniacbug/nRF24L01P_Maniacbug.h

Revision:

2:608cf8c5c55e

Parent:

1:5be48a9550c3

Child:

3:e9c4d66da50c

--- a/nRF24L01P_Maniacbug/nRF24L01P_Maniacbug.h	Mon Jul 06 04:03:48 2015 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,779 +0,0 @@
-/*
-    Copyright (c) 2007 Stefan Engelke <mbox@stefanengelke.de>
-
-    Permission is hereby granted, free of charge, to any person 
-    obtaining a copy of this software and associated documentation 
-    files (the "Software"), to deal in the Software without 
-    restriction, including without limitation the rights to use, copy, 
-    modify, merge, publish, distribute, sublicense, and/or sell copies 
-    of the Software, and to permit persons to whom the Software is 
-    furnished to do so, subject to the following conditions:
-
-    The above copyright notice and this permission notice shall be 
-    included in all copies or substantial portions of the Software.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
-    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
-    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
-    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 
-    HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
-    WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
-    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
-    DEALINGS IN THE SOFTWARE.
-*/
-
-/* Memory Map */
-#define CONFIG      0x00
-#define EN_AA       0x01
-#define EN_RXADDR   0x02
-#define SETUP_AW    0x03
-#define SETUP_RETR  0x04
-#define RF_CH       0x05
-#define RF_SETUP    0x06
-#define STATUS      0x07
-#define OBSERVE_TX  0x08
-#define CD          0x09
-#define RX_ADDR_P0  0x0A
-#define RX_ADDR_P1  0x0B
-#define RX_ADDR_P2  0x0C
-#define RX_ADDR_P3  0x0D
-#define RX_ADDR_P4  0x0E
-#define RX_ADDR_P5  0x0F
-#define TX_ADDR     0x10
-#define RX_PW_P0    0x11
-#define RX_PW_P1    0x12
-#define RX_PW_P2    0x13
-#define RX_PW_P3    0x14
-#define RX_PW_P4    0x15
-#define RX_PW_P5    0x16
-#define FIFO_STATUS 0x17
-#define DYNPD       0x1C
-#define FEATURE     0x1D
-
-/* Bit Mnemonics */
-#define MASK_RX_DR  6
-#define MASK_TX_DS  5
-#define MASK_MAX_RT 4
-#define EN_CRC      3
-#define CRCO        2
-#define PWR_UP      1
-#define PRIM_RX     0
-#define ENAA_P5     5
-#define ENAA_P4     4
-#define ENAA_P3     3
-#define ENAA_P2     2
-#define ENAA_P1     1
-#define ENAA_P0     0
-#define ERX_P5      5
-#define ERX_P4      4
-#define ERX_P3      3
-#define ERX_P2      2
-#define ERX_P1      1
-#define ERX_P0      0
-#define AW          0
-#define ARD         4
-#define ARC         0
-#define PLL_LOCK    4
-#define RF_DR       3
-#define RF_PWR      6
-#define RX_DR       6
-#define TX_DS       5
-#define MAX_RT      4
-#define RX_P_NO     1
-#define TX_FULL     0
-#define PLOS_CNT    4
-#define ARC_CNT     0
-#define TX_REUSE    6
-#define FIFO_FULL   5
-#define TX_EMPTY    4
-#define RX_FULL     1
-#define RX_EMPTY    0
-#define DPL_P5      5
-#define DPL_P4      4
-#define DPL_P3      3
-#define DPL_P2      2
-#define DPL_P1      1
-#define DPL_P0      0
-#define EN_DPL      2
-#define EN_ACK_PAY  1
-#define EN_DYN_ACK  0
-
-/* Instruction Mnemonics */
-#define R_REGISTER    0x00
-#define W_REGISTER    0x20
-#define REGISTER_MASK 0x1F
-#define ACTIVATE      0x50
-#define R_RX_PL_WID   0x60
-#define R_RX_PAYLOAD  0x61
-#define W_TX_PAYLOAD  0xA0
-#define W_ACK_PAYLOAD 0xA8
-#define FLUSH_TX      0xE1
-#define FLUSH_RX      0xE2
-#define REUSE_TX_PL   0xE3
-#define NOP           0xFF
-
-/* Non-P omissions */
-#define LNA_HCURR   0
-
-/* P model memory Map */
-#define RPD         0x09
-
-/* P model bit Mnemonics */
-#define RF_DR_LOW   5
-#define RF_DR_HIGH  3
-#define RF_PWR_LOW  1
-#define RF_PWR_HIGH 2
-
-#define HIGH        1
-#define LOW         0
-#define _BV(n) (1 << n)
-
-/*
- Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
-
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License
- version 2 as published by the Free Software Foundation.
- */
-
-/**
- * @file RF24.h
- *
- * Class declaration for RF24 and helper enums
- */
-
-#ifndef __RF24_H__
-#define __RF24_H__
-
-#include <mbed.h>
-
-/**
- * Power Amplifier level.
- *
- * For use with setPALevel()
- */
-typedef enum { RF24_PA_MIN = 0,RF24_PA_LOW, RF24_PA_HIGH, RF24_PA_MAX, RF24_PA_ERROR } rf24_pa_dbm_e ;
-
-/**
- * Data rate.  How fast data moves through the air.
- *
- * For use with setDataRate()
- */
-typedef enum { RF24_1MBPS = 0, RF24_2MBPS, RF24_250KBPS } rf24_datarate_e;
-
-/**
- * CRC Length.  How big (if any) of a CRC is included.
- *
- * For use with setCRCLength()
- */
-typedef enum { RF24_CRC_DISABLED = 0, RF24_CRC_8, RF24_CRC_16 } rf24_crclength_e;
-
-/**
- * Driver for nRF24L01(+) 2.4GHz Wireless Transceiver
- */
-
-class RF24
-{
-private:
-  DigitalOut ce_pin; /**< "Chip Enable" pin, activates the RX or TX role */
-  DigitalOut csn_pin; /**< SPI Chip select */
-  bool wide_band; /* 2Mbs data rate in use? */
-  bool p_variant; /* False for RF24L01 and true for RF24L01P */
-  uint8_t payload_size; /**< Fixed size of payloads */
-  bool ack_payload_available; /**< Whether there is an ack payload waiting */
-  bool dynamic_payloads_enabled; /**< Whether dynamic payloads are enabled. */ 
-  uint8_t ack_payload_length; /**< Dynamic size of pending ack payload. */
-  uint64_t pipe0_reading_address; /**< Last address set on pipe 0 for reading. */
-  SPI spi;
-  Timer mainTimer;
-
-protected:
-  /**
-   * @name Low-level internal interface.
-   *
-   *  Protected methods that address the chip directly.  Regular users cannot
-   *  ever call these.  They are documented for completeness and for developers who
-   *  may want to extend this class.
-   */
-  /**@{*/
-
-  /**
-   * Set chip select pin
-   *
-   * Running SPI bus at PI_CLOCK_DIV2 so we don't waste time transferring data
-   * and best of all, we make use of the radio's FIFO buffers. A lower speed
-   * means we're less likely to effectively leverage our FIFOs and pay a higher
-   * AVR runtime cost as toll.
-   *
-   * @param mode HIGH to take this unit off the SPI bus, LOW to put it on
-   */
-  void csn(int mode);
-
-  /**
-   * Set chip enable
-   *
-   * @param level HIGH to actively begin transmission or LOW to put in standby.  Please see data sheet
-   * for a much more detailed description of this pin.
-   */
-  void ce(int level);  
-
-
-  /**
-   * Read a chunk of data in from a register
-   *
-   * @param reg Which register. Use constants from nRF24L01.h
-   * @param buf Where to put the data
-   * @param len How many bytes of data to transfer
-   * @return Current value of status register
-   */
-  uint8_t read_register(uint8_t reg, uint8_t* buf, uint8_t len);
-
-  /**
-   * Read single byte from a register
-   *
-   * @param reg Which register. Use constants from nRF24L01.h
-   * @return Current value of register @p reg
-   */
-  uint8_t read_register(uint8_t reg);
-
-  /**
-   * Write a chunk of data to a register
-   *
-   * @param reg Which register. Use constants from nRF24L01.h
-   * @param buf Where to get the data
-   * @param len How many bytes of data to transfer
-   * @return Current value of status register
-   */
-  uint8_t write_register(uint8_t reg, const uint8_t* buf, uint8_t len);
-
-  /**
-   * Write a single byte to a register
-   *
-   * @param reg Which register. Use constants from nRF24L01.h
-   * @param value The new value to write
-   * @return Current value of status register
-   */
-  uint8_t write_register(uint8_t reg, uint8_t value);
-
-  /**
-   * Write the transmit payload
-   *
-   * The size of data written is the fixed payload size, see getPayloadSize()
-   *
-   * @param buf Where to get the data
-   * @param len Number of bytes to be sent
-   * @return Current value of status register
-   */
-  uint8_t write_payload(const void* buf, uint8_t len);
-
-  /**
-   * Read the receive payload
-   *
-   * The size of data read is the fixed payload size, see getPayloadSize()
-   *
-   * @param buf Where to put the data
-   * @param len Maximum number of bytes to read
-   * @return Current value of status register
-   */
-  uint8_t read_payload(void* buf, uint8_t len);
-
-
-  /**
-   * Decode and print the given status to stdout
-   *
-   * @param status Status value to print
-   *
-   * @warning Does nothing if stdout is not defined.  See fdevopen in stdio.h
-   */
-  void print_status(uint8_t status);
-
-  /**
-   * Decode and print the given 'observe_tx' value to stdout
-   *
-   * @param value The observe_tx value to print
-   *
-   * @warning Does nothing if stdout is not defined.  See fdevopen in stdio.h
-   */
-  void print_observe_tx(uint8_t value);
-
-  /**
-   * Print the name and value of an 8-bit register to stdout
-   *
-   * Optionally it can print some quantity of successive
-   * registers on the same line.  This is useful for printing a group
-   * of related registers on one line.
-   *
-   * @param name Name of the register
-   * @param reg Which register. Use constants from nRF24L01.h
-   * @param qty How many successive registers to print
-   */
-  void print_byte_register(const char* name, uint8_t reg, uint8_t qty = 1);
-
-  /**
-   * Print the name and value of a 40-bit address register to stdout
-   *
-   * Optionally it can print some quantity of successive
-   * registers on the same line.  This is useful for printing a group
-   * of related registers on one line.
-   *
-   * @param name Name of the register
-   * @param reg Which register. Use constants from nRF24L01.h
-   * @param qty How many successive registers to print
-   */
-  void print_address_register(const char* name, uint8_t reg, uint8_t qty = 1);
-
-  /**
-   * Turn on or off the special features of the chip
-   *
-   * The chip has certain 'features' which are only available when the 'features'
-   * are enabled.  See the datasheet for details.
-   */
-  void toggle_features(void);
-  /**@}*/
-
-public:
-  /**
-   * @name Primary public interface
-   *
-   *  These are the main methods you need to operate the chip
-   */
-  /**@{*/
-
-  /**
-   * Constructor
-   *
-   * Creates a new instance of this driver.  Before using, you create an instance
-   * and send in the unique pins that this chip is connected to.
-   *
-   * @param _cepin The pin attached to Chip Enable on the RF module
-   * @param _cspin The pin attached to Chip Select
-   */
-  RF24(PinName mosi, PinName miso, PinName sck, PinName _csnpin, PinName _cepin);
-
-  /**
-   * Begin operation of the chip
-   *
-   * Call this in setup(), before calling any other methods.
-   */
-  void begin(void);
-  
-    /**
-   * Retrieve the current status of the chip
-   *
-   * @return Current value of status register
-   */
-  uint8_t get_status(void);
-    
-  /**
-   * Empty the receive buffer
-   *
-   * @return Current value of status register
-   */
-  uint8_t flush_rx(void);
-
-  /**
-   * Empty the transmit buffer
-   *
-   * @return Current value of status register
-   */
-  uint8_t flush_tx(void);
-
-  /**
-   * Start listening on the pipes opened for reading.
-   *
-   * Be sure to call openReadingPipe() first.  Do not call write() while
-   * in this mode, without first calling stopListening().  Call
-   * isAvailable() to check for incoming traffic, and read() to get it.
-   */
-  void startListening(void);
-
-  /**
-   * Stop listening for incoming messages
-   *
-   * Do this before calling write().
-   */
-  void stopListening(void);
-
-  /**
-   * Write to the open writing pipe
-   *
-   * Be sure to call openWritingPipe() first to set the destination
-   * of where to write to.
-   *
-   * This blocks until the message is successfully acknowledged by
-   * the receiver or the timeout/retransmit maxima are reached.  In
-   * the current configuration, the max delay here is 60ms.
-   *
-   * The maximum size of data written is the fixed payload size, see
-   * getPayloadSize().  However, you can write less, and the remainder
-   * will just be filled with zeroes.
-   *
-   * @param buf Pointer to the data to be sent
-   * @param len Number of bytes to be sent
-   * @return True if the payload was delivered successfully false if not
-   */
-  bool write( const void* buf, uint8_t len );
-
-  /**
-   * Test whether there are bytes available to be read
-   *
-   * @return True if there is a payload available, false if none is
-   */
-  bool available(void);
-
-  /**
-   * Read the payload
-   *
-   * Return the last payload received
-   *
-   * The size of data read is the fixed payload size, see getPayloadSize()
-   *
-   * @note I specifically chose 'void*' as a data type to make it easier
-   * for beginners to use.  No casting needed.
-   *
-   * @param buf Pointer to a buffer where the data should be written
-   * @param len Maximum number of bytes to read into the buffer
-   * @return True if the payload was delivered successfully false if not
-   */
-  bool read( void* buf, uint8_t len );
-
-  /**
-   * Open a pipe for writing
-   *
-   * Only one pipe can be open at once, but you can change the pipe
-   * you'll listen to.  Do not call this while actively listening.
-   * Remember to stopListening() first.
-   *
-   * Addresses are 40-bit hex values, e.g.:
-   *
-   * @code
-   *   openWritingPipe(0xF0F0F0F0F0);
-   * @endcode
-   *
-   * @param address The 40-bit address of the pipe to open.  This can be
-   * any value whatsoever, as long as you are the only one writing to it
-   * and only one other radio is listening to it.  Coordinate these pipe
-   * addresses amongst nodes on the network.
-   */
-  void openWritingPipe(uint64_t address);
-
-  /**
-   * Open a pipe for reading
-   *
-   * Up to 6 pipes can be open for reading at once.  Open all the
-   * reading pipes, and then call startListening().
-   *
-   * @see openWritingPipe
-   *
-   * @warning Pipes 1-5 should share the first 32 bits.
-   * Only the least significant byte should be unique, e.g.
-   * @code
-   *   openReadingPipe(1,0xF0F0F0F0AA);
-   *   openReadingPipe(2,0xF0F0F0F066);
-   * @endcode
-   *
-   * @warning Pipe 0 is also used by the writing pipe.  So if you open
-   * pipe 0 for reading, and then startListening(), it will overwrite the
-   * writing pipe.  Ergo, do an openWritingPipe() again before write().
-   *
-   * @todo Enforce the restriction that pipes 1-5 must share the top 32 bits
-   *
-   * @param number Which pipe# to open, 0-5.
-   * @param address The 40-bit address of the pipe to open.
-   */
-  void openReadingPipe(uint8_t number, uint64_t address);
-
-  /**@}*/
-  /**
-   * @name Optional Configurators 
-   *
-   *  Methods you can use to get or set the configuration of the chip.
-   *  None are required.  Calling begin() sets up a reasonable set of
-   *  defaults.
-   */
-  /**@{*/
-  /**
-   * Set the number and delay of retries upon failed submit
-   *
-   * @param delay How long to wait between each retry, in multiples of 250us,
-   * max is 15.  0 means 250us, 15 means 4000us.
-   * @param count How many retries before giving up, max 15
-   */
-  void setRetries(uint8_t delay, uint8_t count);
-
-  /**
-   * Set RF communication channel
-   *
-   * @param channel Which RF channel to communicate on, 0-127
-   */
-  void setChannel(uint8_t channel);
-
-  /**
-   * Set Static Payload Size
-   *
-   * This implementation uses a pre-stablished fixed payload size for all
-   * transmissions.  If this method is never called, the driver will always
-   * transmit the maximum payload size (32 bytes), no matter how much
-   * was sent to write().
-   *
-   * @todo Implement variable-sized payloads feature
-   *
-   * @param size The number of bytes in the payload
-   */
-  void setPayloadSize(uint8_t size);
-
-  /**
-   * Get Static Payload Size
-   *
-   * @see setPayloadSize()
-   *
-   * @return The number of bytes in the payload
-   */
-  uint8_t getPayloadSize(void);
-
-  /**
-   * Get Dynamic Payload Size
-   *
-   * For dynamic payloads, this pulls the size of the payload off
-   * the chip
-   *
-   * @return Payload length of last-received dynamic payload
-   */
-  uint8_t getDynamicPayloadSize(void);
-  
-  /**
-   * Enable custom payloads on the acknowledge packets
-   *
-   * Ack payloads are a handy way to return data back to senders without
-   * manually changing the radio modes on both units.
-   *
-   * @see examples/pingpair_pl/pingpair_pl.pde
-   */
-  void enableAckPayload(void);
-
-  /**
-   * Enable dynamically-sized payloads
-   *
-   * This way you don't always have to send large packets just to send them
-   * once in a while.  This enables dynamic payloads on ALL pipes.
-   *
-   * @see examples/pingpair_pl/pingpair_dyn.pde
-   */
-  void enableDynamicPayloads(void);
-
-  /**
-   * Determine whether the hardware is an nRF24L01+ or not.
-   *
-   * @return true if the hardware is nRF24L01+ (or compatible) and false
-   * if its not.
-   */
-  bool isPVariant(void) ;
-
-  /**
-   * Enable or disable auto-acknowlede packets
-   *
-   * This is enabled by default, so it's only needed if you want to turn
-   * it off for some reason.
-   *
-   * @param enable Whether to enable (true) or disable (false) auto-acks
-   */
-  void setAutoAck(bool enable);
-
-  /**
-   * Enable or disable auto-acknowlede packets on a per pipeline basis.
-   *
-   * AA is enabled by default, so it's only needed if you want to turn
-   * it off/on for some reason on a per pipeline basis.
-   *
-   * @param pipe Which pipeline to modify
-   * @param enable Whether to enable (true) or disable (false) auto-acks
-   */
-  void setAutoAck( uint8_t pipe, bool enable ) ;
-
-  /**
-   * Set Power Amplifier (PA) level to one of four levels.
-   * Relative mnemonics have been used to allow for future PA level
-   * changes. According to 6.5 of the nRF24L01+ specification sheet,
-   * they translate to: RF24_PA_MIN=-18dBm, RF24_PA_LOW=-12dBm,
-   * RF24_PA_MED=-6dBM, and RF24_PA_HIGH=0dBm.
-   *
-   * @param level Desired PA level.
-   */
-  void setPALevel( rf24_pa_dbm_e level ) ;
-
-  /**
-   * Fetches the current PA level.
-   *
-   * @return Returns a value from the rf24_pa_dbm_e enum describing
-   * the current PA setting. Please remember, all values represented
-   * by the enum mnemonics are negative dBm. See setPALevel for
-   * return value descriptions.
-   */
-  rf24_pa_dbm_e getPALevel( void ) ;
-
-  /**
-   * Set the transmission data rate
-   *
-   * @warning setting RF24_250KBPS will fail for non-plus units
-   *
-   * @param speed RF24_250KBPS for 250kbs, RF24_1MBPS for 1Mbps, or RF24_2MBPS for 2Mbps
-   * @return true if the change was successful
-   */
-  bool setDataRate(rf24_datarate_e speed);
-  
-  /**
-   * Fetches the transmission data rate
-   *
-   * @return Returns the hardware's currently configured datarate. The value
-   * is one of 250kbs, RF24_1MBPS for 1Mbps, or RF24_2MBPS, as defined in the
-   * rf24_datarate_e enum.
-   */
-  rf24_datarate_e getDataRate( void ) ;
-
-  /**
-   * Set the CRC length
-   *
-   * @param length RF24_CRC_8 for 8-bit or RF24_CRC_16 for 16-bit
-   */
-  void setCRCLength(rf24_crclength_e length);
-
-  /**
-   * Get the CRC length
-   *
-   * @return RF24_DISABLED if disabled or RF24_CRC_8 for 8-bit or RF24_CRC_16 for 16-bit
-   */
-  rf24_crclength_e getCRCLength(void);
-
-  /**
-   * Disable CRC validation
-   *
-   */
-  void disableCRC( void ) ;
-
-  /**@}*/
-  /**
-   * @name Advanced Operation 
-   *
-   *  Methods you can use to drive the chip in more advanced ways 
-   */
-  /**@{*/
-
-  /**
-   * Print a giant block of debugging information to stdout
-   *
-   * @warning Does nothing if stdout is not defined.  See fdevopen in stdio.h
-   */
-  void printDetails(void);
-
-  /**
-   * Enter low-power mode
-   *
-   * To return to normal power mode, either write() some data or
-   * startListening, or powerUp().
-   */
-  void powerDown(void);
-
-  /**
-   * Leave low-power mode - making radio more responsive
-   *
-   * To return to low power mode, call powerDown().
-   */
-  void powerUp(void) ;
-
-  /**
-   * Test whether there are bytes available to be read
-   *
-   * Use this version to discover on which pipe the message
-   * arrived.
-   *
-   * @param[out] pipe_num Which pipe has the payload available
-   * @return True if there is a payload available, false if none is
-   */
-  bool available(uint8_t* pipe_num);
-
-  /**
-   * Non-blocking write to the open writing pipe
-   *
-   * Just like write(), but it returns immediately. To find out what happened
-   * to the send, catch the IRQ and then call whatHappened().
-   *
-   * @see write()
-   * @see whatHappened()
-   *
-   * @param buf Pointer to the data to be sent
-   * @param len Number of bytes to be sent
-   * @return True if the payload was delivered successfully false if not
-   */
-  void startWrite( const void* buf, uint8_t len );
-
-  /**
-   * Write an ack payload for the specified pipe
-   *
-   * The next time a message is received on @p pipe, the data in @p buf will
-   * be sent back in the acknowledgement.
-   *
-   * @warning According to the data sheet, only three of these can be pending
-   * at any time.  I have not tested this.
-   *
-   * @param pipe Which pipe# (typically 1-5) will get this response.
-   * @param buf Pointer to data that is sent
-   * @param len Length of the data to send, up to 32 bytes max.  Not affected
-   * by the static payload set by setPayloadSize().
-   */
-  void writeAckPayload(uint8_t pipe, const void* buf, uint8_t len);
-
-  /**
-   * Determine if an ack payload was received in the most recent call to
-   * write().
-   *
-   * Call read() to retrieve the ack payload.
-   *
-   * @warning Calling this function clears the internal flag which indicates
-   * a payload is available.  If it returns true, you must read the packet
-   * out as the very next interaction with the radio, or the results are
-   * undefined.
-   *
-   * @return True if an ack payload is available.
-   */
-  bool isAckPayloadAvailable(void);
-
-  /**
-   * Call this when you get an interrupt to find out why
-   *
-   * Tells you what caused the interrupt, and clears the state of
-   * interrupts.
-   *
-   * @param[out] tx_ok The send was successful (TX_DS)
-   * @param[out] tx_fail The send failed, too many retries (MAX_RT)
-   * @param[out] rx_ready There is a message waiting to be read (RX_DS)
-   */
-  void whatHappened(bool& tx_ok,bool& tx_fail,bool& rx_ready);
-
-  /**
-   * Test whether there was a carrier on the line for the
-   * previous listening period.
-   *
-   * Useful to check for interference on the current channel.
-   *
-   * @return true if was carrier, false if not
-   */
-  bool testCarrier(void);
-
-  /**
-   * Test whether a signal (carrier or otherwise) greater than
-   * or equal to -64dBm is present on the channel. Valid only
-   * on nRF24L01P (+) hardware. On nRF24L01, use testCarrier().
-   *
-   * Useful to check for interference on the current channel and
-   * channel hopping strategies.
-   *
-   * @return true if signal => -64dBm, false if not
-   */
-  bool testRPD(void) ;
-  
-  uint8_t min(uint8_t, uint8_t);
-};
-
-
-#endif // __RF24_H__
-// vim:ai:cin:sts=2 sw=2 ft=cpp