Diff: nRF24L01P.h

Revision:

0:8ae48233b4e4

diff -r 000000000000 -r 8ae48233b4e4 nRF24L01P.h
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+++ b/nRF24L01P.h	Wed Jan 19 22:59:48 2011 +0000
@@ -0,0 +1,347 @@
+/**
+ * @file nRF24L01P.h
+ *
+ * @author Owen Edwards
+ * 
+ * @section LICENSE
+ *
+ * Copyright (c) 2010 Owen Edwards
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, either version 3 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * @section DESCRIPTION
+ *
+ * nRF24L01+ Single Chip 2.4GHz Transceiver from Nordic Semiconductor.
+ *
+ * Datasheet:
+ *
+ * http://www.nordicsemi.no/files/Product/data_sheet/nRF24L01P_Product_Specification_1_0.pdf
+ */
+
+#ifndef __NRF24L01P_H__
+#define __NRF24L01P_H__
+
+/**
+ * Includes
+ */
+#include "mbed.h"
+
+/**
+ * Defines
+ */
+#define NRF24L01P_TX_PWR_ZERO_DB         0
+#define NRF24L01P_TX_PWR_MINUS_6_DB     -6
+#define NRF24L01P_TX_PWR_MINUS_12_DB   -12
+#define NRF24L01P_TX_PWR_MINUS_18_DB   -18
+
+#define NRF24L01P_DATARATE_250_KBPS    250
+#define NRF24L01P_DATARATE_1_MBPS     1000
+#define NRF24L01P_DATARATE_2_MBPS     2000
+
+#define NRF24L01P_CRC_NONE               0
+#define NRF24L01P_CRC_8_BIT              8
+#define NRF24L01P_CRC_16_BIT            16
+
+#define NRF24L01P_MIN_RF_FREQUENCY    2400
+#define NRF24L01P_MAX_RF_FREQUENCY    2525
+
+#define NRF24L01P_PIPE_P0                0
+#define NRF24L01P_PIPE_P1                1
+#define NRF24L01P_PIPE_P2                2
+#define NRF24L01P_PIPE_P3                3
+#define NRF24L01P_PIPE_P4                4
+#define NRF24L01P_PIPE_P5                5
+
+/**
+* Default setup for the nRF24L01+, based on the Sparkfun "Nordic Serial Interface Board"
+*  for evaluation (http://www.sparkfun.com/products/9019)
+*/
+#define DEFAULT_NRF24L01P_ADDRESS       ((unsigned long long) 0xE7E7E7E7E7 )
+#define DEFAULT_NRF24L01P_ADDRESS_WIDTH  5
+#define DEFAULT_NRF24L01P_CRC            NRF24L01P_CRC_8_BIT
+#define DEFAULT_NRF24L01P_RF_FREQUENCY  (NRF24L01P_MIN_RF_FREQUENCY + 2)
+#define DEFAULT_NRF24L01P_DATARATE       NRF24L01P_DATARATE_1_MBPS
+#define DEFAULT_NRF24L01P_TX_PWR         NRF24L01P_TX_PWR_ZERO_DB
+#define DEFAULT_NRF24L01P_TRANSFER_SIZE  4
+
+/**
+ * nRF24L01+ Single Chip 2.4GHz Transceiver from Nordic Semiconductor.
+ */
+class nRF24L01P {
+
+public:
+
+    /**
+     * Constructor.
+     *
+     * @param mosi mbed pin to use for MOSI line of SPI interface.
+     * @param miso mbed pin to use for MISO line of SPI interface.
+     * @param sck mbed pin to use for SCK line of SPI interface.
+     * @param csn mbed pin to use for not chip select line of SPI interface.
+     * @param ce mbed pin to use for the chip enable line.
+     * @param irq mbed pin to use for the interrupt request line.
+     */
+    nRF24L01P(PinName mosi, PinName miso, PinName sck, PinName csn, PinName ce, PinName irq = NC);
+
+    /**
+     * Set the RF frequency.
+     *
+     * @param frequency the frequency of RF transmission in MHz (2400..2525).
+     */
+    void setRfFrequency(int frequency = DEFAULT_NRF24L01P_RF_FREQUENCY);
+
+    /**
+     * Get the RF frequency.
+     *
+     * @return the frequency of RF transmission in MHz (2400..2525).
+     */
+    int getRfFrequency(void);
+
+    /**
+     * Set the RF output power.
+     *
+     * @param power the RF output power in dBm (0, -6, -12 or -18).
+     */
+    void setRfOutputPower(int power = DEFAULT_NRF24L01P_TX_PWR);
+
+    /**
+     * Get the RF output power.
+     *
+     * @return the RF output power in dBm (0, -6, -12 or -18).
+     */
+    int getRfOutputPower(void);
+
+    /**
+     * Set the Air data rate.
+     *
+     * @param rate the air data rate in kbps (250, 1M or 2M).
+     */
+    void setAirDataRate(int rate = DEFAULT_NRF24L01P_DATARATE);
+
+    /**
+     * Get the Air data rate.
+     *
+     * @return the air data rate in kbps (250, 1M or 2M).
+     */
+    int getAirDataRate(void);
+
+    /**
+     * Set the CRC width.
+     *
+     * @param width the number of bits for the CRC (0, 8 or 16).
+     */
+    void setCrcWidth(int width = DEFAULT_NRF24L01P_CRC);
+
+    /**
+     * Get the CRC width.
+     *
+     * @return the number of bits for the CRC (0, 8 or 16).
+     */
+    int getCrcWidth(void);
+
+    /**
+     * Set the Receive address.
+     *
+     * @param address address associated with the particular pipe
+     * @param width width of the address in bytes (3..5)
+     * @param pipe pipe to associate the address with (0..5, default 0)
+     *
+     * Note that Pipes 0 & 1 have 3, 4 or 5 byte addresses,
+     *  while Pipes 2..5 only use the lowest byte (bits 7..0) of the
+     *  address provided here, and use 2, 3 or 4 bytes from Pipe 1's address.
+     *  The width parameter is ignored for Pipes 2..5.
+     */
+    void setRxAddress(unsigned long long address = DEFAULT_NRF24L01P_ADDRESS, int width = DEFAULT_NRF24L01P_ADDRESS_WIDTH, int pipe = NRF24L01P_PIPE_P0);
+
+    void setRxAddress(unsigned long msb_address, unsigned long lsb_address, int width, int pipe = NRF24L01P_PIPE_P0);
+
+    /**
+     * Set the Transmit address.
+     *
+     * @param address address for transmission
+     * @param width width of the address in bytes (3..5)
+     *
+     * Note that the address width is shared with the Receive pipes,
+     *  so a change to that address width affect transmissions.
+     */
+    void setTxAddress(unsigned long long address = DEFAULT_NRF24L01P_ADDRESS, int width = DEFAULT_NRF24L01P_ADDRESS_WIDTH);
+
+    void setTxAddress(unsigned long msb_address, unsigned long lsb_address, int width);
+
+    /**
+     * Get the Receive address.
+     *
+     * @param pipe pipe to get the address from (0..5, default 0)
+     * @return the address associated with the particular pipe
+     */
+    unsigned long long getRxAddress(int pipe = NRF24L01P_PIPE_P0);
+
+    /**
+     * Get the Transmit address.
+     *
+     * @return address address for transmission
+     */
+    unsigned long long getTxAddress(void);
+
+    /**
+     * Set the transfer size.
+     *
+     * @param size the size of the transfer, in bytes (1..32)
+     * @param pipe pipe for the transfer (0..5, default 0)
+     */
+    void setTransferSize(int size = DEFAULT_NRF24L01P_TRANSFER_SIZE, int pipe = NRF24L01P_PIPE_P0);
+
+    /**
+     * Get the transfer size.
+     *
+     * @return the size of the transfer, in bytes (1..32).
+     */
+    int getTransferSize(int pipe = NRF24L01P_PIPE_P0);
+
+
+    /**
+     * Get the RPD (Received Power Detector) state.
+     *
+     * @return true if the received power exceeded -64dBm
+     */
+    bool getRPD(void);
+
+    /**
+     * Put the nRF24L01+ into Receive mode
+     */
+    void setReceiveMode(void);
+
+    /**
+     * Put the nRF24L01+ into Transmit mode
+     */
+    void setTransmitMode(void);
+
+    /**
+     * Power up the nRF24L01+ into Standby mode
+     */
+    void powerUp(void);
+
+    /**
+     * Power down the nRF24L01+ into Power Down mode
+     */
+    void powerDown(void);
+
+    /**
+     * Enable the nRF24L01+ to Receive or Transmit (using the CE pin)
+     */
+    void enable(void);
+
+    /**
+     * Disable the nRF24L01+ to Receive or Transmit (using the CE pin)
+     */
+    void disable(void);
+
+    /**
+     * Transmit data
+     *
+     * @param pipe is ignored (included for consistency with file write routine)
+     * @param data pointer to an array of bytes to write
+     * @param count the number of bytes to send (1..32)
+     * @return the number of bytes actually written, or -1 for an error
+     */
+    int write(int pipe, char *data, int count);
+    
+    /**
+     * Receive data
+     *
+     * @param pipe the receive pipe to get data from
+     * @param data pointer to an array of bytes to store the received data
+     * @param count the number of bytes to receive (1..32)
+     * @return the number of bytes actually received, 0 if none are received, or -1 for an error
+     */
+    int read(int pipe, char *data, int count);
+
+    /**
+     * Determine if there is data available to read
+     *
+     * @param pipe the receive pipe to check for data
+     * @return true if the is data waiting in the given pipe
+     */
+    bool readable(int pipe = NRF24L01P_PIPE_P0);
+
+    /**
+     * Disable all receive pipes
+     *
+     * Note: receive pipes are enabled when their address is set.
+     */
+    void disableAllRxPipes(void);
+    
+    /**
+     * Disable AutoAcknowledge function
+     */
+    void disableAutoAcknowledge(void);
+    
+    /**
+     * Enable AutoAcknowledge function
+     *
+     * @param pipe the receive pipe
+     */
+    void enableAutoAcknowledge(int pipe = NRF24L01P_PIPE_P0);
+    
+    /**
+     * Disable AutoRetransmit function
+     */
+    void disableAutoRetransmit(void);
+    
+    /**
+     * Enable AutoRetransmit function
+     *
+     * @param delay the delay between restransmits, in uS (250uS..4000uS)
+     * @param count number of retransmits before generating an error (1..15)
+     */
+    void enableAutoRetransmit(int delay, int count);
+
+private:
+
+    /**
+     * Get the contents of an addressable register.
+     *
+     * @param regAddress address of the register
+     * @return the contents of the register
+     */
+    int getRegister(int regAddress);
+
+    /**
+     * Set the contents of an addressable register.
+     *
+     * @param regAddress address of the register
+     * @param regData data to write to the register
+     */
+    void setRegister(int regAddress, int regData);
+
+    /**
+     * Get the contents of the status register.
+     *
+     * @return the contents of the status register
+     */
+    int getStatusRegister(void);
+
+    SPI         spi_;
+    DigitalOut  nCS_;
+    DigitalOut  ce_;
+    InterruptIn nIRQ_;
+
+    int mode;
+
+};
+
+#endif /* __NRF24L01P_H__ */