Add nrf24L01+ library
This commit is contained in:
Rihards Skuja
parent
40b00749e1
commit
153bf288b8
130
include/nRF24L01.h
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130
include/nRF24L01.h
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/*
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Copyright (c) 2007 Stefan Engelke <mbox@stefanengelke.de>
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use, copy,
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modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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$Id$
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*/
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/* Memory Map */
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#define CONFIG 0x00
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#define EN_AA 0x01
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#define EN_RXADDR 0x02
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#define SETUP_AW 0x03
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#define SETUP_RETR 0x04
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#define RF_CH 0x05
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#define RF_SETUP 0x06
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#define STATUS 0x07
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#define OBSERVE_TX 0x08
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#define CD 0x09
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#define RX_ADDR_P0 0x0A
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#define RX_ADDR_P1 0x0B
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#define RX_ADDR_P2 0x0C
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#define RX_ADDR_P3 0x0D
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#define RX_ADDR_P4 0x0E
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#define RX_ADDR_P5 0x0F
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#define TX_ADDR 0x10
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#define RX_PW_P0 0x11
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#define RX_PW_P1 0x12
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#define RX_PW_P2 0x13
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#define RX_PW_P3 0x14
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#define RX_PW_P4 0x15
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#define RX_PW_P5 0x16
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#define FIFO_STATUS 0x17
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#define DYNPD 0x1C
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/* Bit Mnemonics */
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/* configuratio nregister */
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#define MASK_RX_DR 6
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#define MASK_TX_DS 5
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#define MASK_MAX_RT 4
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#define EN_CRC 3
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#define CRCO 2
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#define PWR_UP 1
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#define PRIM_RX 0
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/* enable auto acknowledgment */
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#define ENAA_P5 5
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#define ENAA_P4 4
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#define ENAA_P3 3
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#define ENAA_P2 2
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#define ENAA_P1 1
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#define ENAA_P0 0
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/* enable rx addresses */
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#define ERX_P5 5
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#define ERX_P4 4
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#define ERX_P3 3
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#define ERX_P2 2
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#define ERX_P1 1
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#define ERX_P0 0
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/* setup of address width */
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#define AW 0 /* 2 bits */
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/* setup of auto re-transmission */
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#define ARD 4 /* 4 bits */
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#define ARC 0 /* 4 bits */
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/* RF setup register */
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#define PLL_LOCK 4
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#define RF_DR 3
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#define RF_PWR 1 /* 2 bits */
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/* general status register */
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#define RX_DR 6
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#define TX_DS 5
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#define MAX_RT 4
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#define RX_P_NO 1 /* 3 bits */
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#define TX_FULL 0
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/* transmit observe register */
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#define PLOS_CNT 4 /* 4 bits */
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#define ARC_CNT 0 /* 4 bits */
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/* fifo status */
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#define TX_REUSE 6
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#define FIFO_FULL 5
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#define TX_EMPTY 4
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#define RX_FULL 1
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#define RX_EMPTY 0
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/* dynamic length */
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#define DPL_P0 0
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#define DPL_P1 1
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#define DPL_P2 2
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#define DPL_P3 3
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#define DPL_P4 4
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#define DPL_P5 5
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/* Instruction Mnemonics */
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#define R_REGISTER 0x00 /* last 4 bits will indicate reg. address */
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#define W_REGISTER 0x20 /* last 4 bits will indicate reg. address */
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#define REGISTER_MASK 0x1F
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#define R_RX_PAYLOAD 0x61
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#define W_TX_PAYLOAD 0xA0
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#define FLUSH_TX 0xE1
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#define FLUSH_RX 0xE2
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#define REUSE_TX_PL 0xE3
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#define ACTIVATE 0x50
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#define R_RX_PL_WID 0x60
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#define NOP 0xFF
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116
include/nrf24.h
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116
include/nrf24.h
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@ -0,0 +1,116 @@
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/*
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* ----------------------------------------------------------------------------
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* “THE COFFEEWARE LICENSE” (Revision 1):
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* <ihsan@kehribar.me> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a coffee in return.
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* -----------------------------------------------------------------------------
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* This library is based on this library:
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* https://github.com/aaronds/arduino-nrf24l01
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* Which is based on this library:
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* http://www.tinkerer.eu/AVRLib/nRF24L01
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* -----------------------------------------------------------------------------
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*/
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#ifndef NRF24
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#define NRF24
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#include "nRF24L01.h"
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#include <stdint.h>
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#define LOW 0
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#define HIGH 1
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#define nrf24_ADDR_LEN 5
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#define nrf24_CONFIG ((1<<EN_CRC)|(0<<CRCO))
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#define NRF24_TRANSMISSON_OK 0
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#define NRF24_MESSAGE_LOST 1
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/* adjustment functions */
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void nrf24_init();
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void nrf24_rx_address(uint8_t *adr);
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void nrf24_tx_address(uint8_t *adr);
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void nrf24_config(uint8_t channel, uint8_t pay_length);
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/* state check functions */
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uint8_t nrf24_dataReady();
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uint8_t nrf24_isSending();
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uint8_t nrf24_getStatus();
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uint8_t nrf24_rxFifoEmpty();
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/* core TX / RX functions */
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void nrf24_send(uint8_t *value);
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void nrf24_getData(uint8_t *data);
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/* use in dynamic length mode */
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uint8_t nrf24_payloadLength();
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/* post transmission analysis */
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uint8_t nrf24_lastMessageStatus();
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uint8_t nrf24_retransmissionCount();
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/* Returns the payload length */
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uint8_t nrf24_payload_length();
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/* power management */
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void nrf24_powerUpRx();
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void nrf24_powerUpTx();
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void nrf24_powerDown();
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/* low level interface ... */
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uint8_t spi_transfer(uint8_t tx);
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void nrf24_transmitSync(uint8_t *dataout, uint8_t len);
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void nrf24_transferSync(uint8_t *dataout, uint8_t *datain, uint8_t len);
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void nrf24_configRegister(uint8_t reg, uint8_t value);
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void nrf24_readRegister(uint8_t reg, uint8_t *value, uint8_t len);
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void nrf24_writeRegister(uint8_t reg, uint8_t *value, uint8_t len);
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/* -------------------------------------------------------------------------- */
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/* You should implement the platform spesific functions in your code */
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/* -------------------------------------------------------------------------- */
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/* -------------------------------------------------------------------------- */
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/* In this function you should do the following things:
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* - Set MISO pin input
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* - Set MOSI pin output
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* - Set SCK pin output
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* - Set CSN pin output
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* - Set CE pin output */
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/* -------------------------------------------------------------------------- */
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extern void nrf24_setupPins();
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/* -------------------------------------------------------------------------- */
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/* nrf24 CE pin control function
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* - state:1 => Pin HIGH
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* - state:0 => Pin LOW */
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/* -------------------------------------------------------------------------- */
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extern void nrf24_ce_digitalWrite(uint8_t state);
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/* -------------------------------------------------------------------------- */
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/* nrf24 CE pin control function
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* - state:1 => Pin HIGH
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* - state:0 => Pin LOW */
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/* -------------------------------------------------------------------------- */
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extern void nrf24_csn_digitalWrite(uint8_t state);
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/* -------------------------------------------------------------------------- */
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/* nrf24 SCK pin control function
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* - state:1 => Pin HIGH
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* - state:0 => Pin LOW */
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/* -------------------------------------------------------------------------- */
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extern void nrf24_sck_digitalWrite(uint8_t state);
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/* -------------------------------------------------------------------------- */
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/* nrf24 MOSI pin control function
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* - state:1 => Pin HIGH
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* - state:0 => Pin LOW */
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/* -------------------------------------------------------------------------- */
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extern void nrf24_mosi_digitalWrite(uint8_t state);
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/* -------------------------------------------------------------------------- */
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/* nrf24 MISO pin read function
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* - returns: Non-zero if the pin is high */
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/* -------------------------------------------------------------------------- */
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extern uint8_t nrf24_miso_digitalRead();
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#endif
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@ -1,10 +1,10 @@
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <util/delay.h>
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/* https://github.com/kehribar/nrf24L01_plus */
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#include "ds18b20.h"
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#include "main.h"
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#include "nrf24.h"
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#include "io.h"
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#include "main.h"
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#ifdef DEBUG
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#include "debug.h"
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339
src/nrf24.c
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339
src/nrf24.c
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@ -0,0 +1,339 @@
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/*
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* ----------------------------------------------------------------------------
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* “THE COFFEEWARE LICENSE” (Revision 1):
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* <ihsan@kehribar.me> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a coffee in return.
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* -----------------------------------------------------------------------------
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* This library is based on this library:
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* https://github.com/aaronds/arduino-nrf24l01
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* Which is based on this library:
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* http://www.tinkerer.eu/AVRLib/nRF24L01
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* -----------------------------------------------------------------------------
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*/
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#include "nrf24.h"
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uint8_t payload_len;
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/* init the hardware pins */
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void nrf24_init()
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{
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nrf24_setupPins();
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nrf24_ce_digitalWrite(LOW);
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nrf24_csn_digitalWrite(HIGH);
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}
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/* configure the module */
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void nrf24_config(uint8_t channel, uint8_t pay_length)
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{
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/* Use static payload length ... */
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payload_len = pay_length;
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// Set RF channel
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nrf24_configRegister(RF_CH, channel);
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// Set length of incoming payload
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nrf24_configRegister(RX_PW_P0, 0x00); // Auto-ACK pipe ...
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nrf24_configRegister(RX_PW_P1, payload_len); // Data payload pipe
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nrf24_configRegister(RX_PW_P2, 0x00); // Pipe not used
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nrf24_configRegister(RX_PW_P3, 0x00); // Pipe not used
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nrf24_configRegister(RX_PW_P4, 0x00); // Pipe not used
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nrf24_configRegister(RX_PW_P5, 0x00); // Pipe not used
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// 1 Mbps, TX gain: 0dbm
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nrf24_configRegister(RF_SETUP, (0 << RF_DR) | ((0x03) << RF_PWR));
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// CRC enable, 1 byte CRC length
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nrf24_configRegister(CONFIG, nrf24_CONFIG);
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// Auto Acknowledgment
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nrf24_configRegister(EN_AA, (1 << ENAA_P0) | (1 << ENAA_P1) | (0 << ENAA_P2) | (0 << ENAA_P3) | (0 << ENAA_P4) | (0 << ENAA_P5));
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// Enable RX addresses
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nrf24_configRegister(EN_RXADDR, (1 << ERX_P0) | (1 << ERX_P1) | (0 << ERX_P2) | (0 << ERX_P3) | (0 << ERX_P4) | (0 << ERX_P5));
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// Auto retransmit delay: 1000 us and Up to 15 retransmit trials
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nrf24_configRegister(SETUP_RETR, (0x04 << ARD) | (0x0F << ARC));
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// Dynamic length configurations: No dynamic length
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nrf24_configRegister(DYNPD, (0 << DPL_P0) | (0 << DPL_P1) | (0 << DPL_P2) | (0 << DPL_P3) | (0 << DPL_P4) | (0 << DPL_P5));
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// Start listening
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nrf24_powerUpRx();
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}
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/* Set the RX address */
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void nrf24_rx_address(uint8_t *adr)
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{
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nrf24_ce_digitalWrite(LOW);
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nrf24_writeRegister(RX_ADDR_P1, adr, nrf24_ADDR_LEN);
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nrf24_ce_digitalWrite(HIGH);
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}
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/* Returns the payload length */
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uint8_t nrf24_payload_length()
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{
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return payload_len;
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}
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/* Set the TX address */
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void nrf24_tx_address(uint8_t *adr)
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{
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/* RX_ADDR_P0 must be set to the sending addr for auto ack to work. */
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nrf24_writeRegister(RX_ADDR_P0, adr, nrf24_ADDR_LEN);
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nrf24_writeRegister(TX_ADDR, adr, nrf24_ADDR_LEN);
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}
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/* Checks if data is available for reading */
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/* Returns 1 if data is ready ... */
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uint8_t nrf24_dataReady()
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{
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// See note in getData() function - just checking RX_DR isn't good enough
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uint8_t status = nrf24_getStatus();
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// We can short circuit on RX_DR, but if it's not set, we still need
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// to check the FIFO for any pending packets
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if (status & (1 << RX_DR)) {
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return 1;
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}
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return !nrf24_rxFifoEmpty();;
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}
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/* Checks if receive FIFO is empty or not */
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uint8_t nrf24_rxFifoEmpty()
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{
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uint8_t fifoStatus;
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nrf24_readRegister(FIFO_STATUS, &fifoStatus, 1);
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return (fifoStatus & (1 << RX_EMPTY));
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}
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/* Returns the length of data waiting in the RX fifo */
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uint8_t nrf24_payloadLength()
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{
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uint8_t status;
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nrf24_csn_digitalWrite(LOW);
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spi_transfer(R_RX_PL_WID);
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status = spi_transfer(0x00);
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nrf24_csn_digitalWrite(HIGH);
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return status;
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}
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/* Reads payload bytes into data array */
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void nrf24_getData(uint8_t *data)
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{
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/* Pull down chip select */
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nrf24_csn_digitalWrite(LOW);
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/* Send cmd to read rx payload */
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spi_transfer(R_RX_PAYLOAD);
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/* Read payload */
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nrf24_transferSync(data, data, payload_len);
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/* Pull up chip select */
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nrf24_csn_digitalWrite(HIGH);
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/* Reset status register */
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nrf24_configRegister(STATUS, (1 << RX_DR));
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}
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/* Returns the number of retransmissions occured for the last message */
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uint8_t nrf24_retransmissionCount()
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{
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uint8_t rv;
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nrf24_readRegister(OBSERVE_TX, &rv, 1);
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rv = rv & 0x0F;
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return rv;
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}
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// Sends a data package to the default address. Be sure to send the correct
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// amount of bytes as configured as payload on the receiver.
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void nrf24_send(uint8_t *value)
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{
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/* Go to Standby-I first */
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nrf24_ce_digitalWrite(LOW);
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/* Set to transmitter mode , Power up if needed */
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nrf24_powerUpTx();
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/* Do we really need to flush TX fifo each time ? */
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#if 1
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/* Pull down chip select */
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nrf24_csn_digitalWrite(LOW);
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/* Write cmd to flush transmit FIFO */
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spi_transfer(FLUSH_TX);
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/* Pull up chip select */
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nrf24_csn_digitalWrite(HIGH);
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#endif
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/* Pull down chip select */
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nrf24_csn_digitalWrite(LOW);
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/* Write cmd to write payload */
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spi_transfer(W_TX_PAYLOAD);
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/* Write payload */
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nrf24_transmitSync(value, payload_len);
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/* Pull up chip select */
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nrf24_csn_digitalWrite(HIGH);
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/* Start the transmission */
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nrf24_ce_digitalWrite(HIGH);
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}
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uint8_t nrf24_isSending()
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{
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uint8_t status;
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/* read the current status */
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status = nrf24_getStatus();
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/* if sending successful (TX_DS) or max retries exceded (MAX_RT). */
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if ((status & ((1 << TX_DS) | (1 << MAX_RT)))) {
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return 0; /* false */
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}
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return 1; /* true */
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}
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uint8_t nrf24_getStatus()
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{
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uint8_t rv;
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nrf24_csn_digitalWrite(LOW);
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rv = spi_transfer(NOP);
|
||||
nrf24_csn_digitalWrite(HIGH);
|
||||
return rv;
|
||||
}
|
||||
|
||||
uint8_t nrf24_lastMessageStatus()
|
||||
{
|
||||
uint8_t rv;
|
||||
|
||||
rv = nrf24_getStatus();
|
||||
|
||||
/* Transmission went OK */
|
||||
if ((rv & ((1 << TX_DS)))) {
|
||||
return NRF24_TRANSMISSON_OK;
|
||||
}
|
||||
/* Maximum retransmission count is reached */
|
||||
/* Last message probably went missing ... */
|
||||
else if ((rv & ((1 << MAX_RT)))) {
|
||||
return NRF24_MESSAGE_LOST;
|
||||
}
|
||||
/* Probably still sending ... */
|
||||
else {
|
||||
return 0xFF;
|
||||
}
|
||||
}
|
||||
|
||||
void nrf24_powerUpRx()
|
||||
{
|
||||
nrf24_csn_digitalWrite(LOW);
|
||||
spi_transfer(FLUSH_RX);
|
||||
nrf24_csn_digitalWrite(HIGH);
|
||||
|
||||
nrf24_configRegister(STATUS, (1 << RX_DR) | (1 << TX_DS) | (1 << MAX_RT));
|
||||
|
||||
nrf24_ce_digitalWrite(LOW);
|
||||
nrf24_configRegister(CONFIG, nrf24_CONFIG | ((1 << PWR_UP) | (1 << PRIM_RX)));
|
||||
nrf24_ce_digitalWrite(HIGH);
|
||||
}
|
||||
|
||||
void nrf24_powerUpTx()
|
||||
{
|
||||
nrf24_configRegister(STATUS, (1 << RX_DR) | (1 << TX_DS) | (1 << MAX_RT));
|
||||
|
||||
nrf24_configRegister(CONFIG, nrf24_CONFIG | ((1 << PWR_UP) | (0 << PRIM_RX)));
|
||||
}
|
||||
|
||||
void nrf24_powerDown()
|
||||
{
|
||||
nrf24_ce_digitalWrite(LOW);
|
||||
nrf24_configRegister(CONFIG, nrf24_CONFIG);
|
||||
}
|
||||
|
||||
/* software spi routine */
|
||||
uint8_t spi_transfer(uint8_t tx)
|
||||
{
|
||||
uint8_t i = 0;
|
||||
uint8_t rx = 0;
|
||||
|
||||
nrf24_sck_digitalWrite(LOW);
|
||||
|
||||
for (i = 0; i < 8; i++) {
|
||||
|
||||
if (tx & (1 << (7 - i))) {
|
||||
nrf24_mosi_digitalWrite(HIGH);
|
||||
} else {
|
||||
nrf24_mosi_digitalWrite(LOW);
|
||||
}
|
||||
|
||||
nrf24_sck_digitalWrite(HIGH);
|
||||
|
||||
rx = rx << 1;
|
||||
if (nrf24_miso_digitalRead()) {
|
||||
rx |= 0x01;
|
||||
}
|
||||
|
||||
nrf24_sck_digitalWrite(LOW);
|
||||
|
||||
}
|
||||
|
||||
return rx;
|
||||
}
|
||||
|
||||
/* send and receive multiple bytes over SPI */
|
||||
void nrf24_transferSync(uint8_t *dataout, uint8_t *datain, uint8_t len)
|
||||
{
|
||||
uint8_t i;
|
||||
|
||||
for (i = 0; i < len; i++) {
|
||||
datain[i] = spi_transfer(dataout[i]);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/* send multiple bytes over SPI */
|
||||
void nrf24_transmitSync(uint8_t *dataout, uint8_t len)
|
||||
{
|
||||
uint8_t i;
|
||||
|
||||
for (i = 0; i < len; i++) {
|
||||
spi_transfer(dataout[i]);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/* Clocks only one byte into the given nrf24 register */
|
||||
void nrf24_configRegister(uint8_t reg, uint8_t value)
|
||||
{
|
||||
nrf24_csn_digitalWrite(LOW);
|
||||
spi_transfer(W_REGISTER | (REGISTER_MASK & reg));
|
||||
spi_transfer(value);
|
||||
nrf24_csn_digitalWrite(HIGH);
|
||||
}
|
||||
|
||||
/* Read single register from nrf24 */
|
||||
void nrf24_readRegister(uint8_t reg, uint8_t *value, uint8_t len)
|
||||
{
|
||||
nrf24_csn_digitalWrite(LOW);
|
||||
spi_transfer(R_REGISTER | (REGISTER_MASK & reg));
|
||||
nrf24_transferSync(value, value, len);
|
||||
nrf24_csn_digitalWrite(HIGH);
|
||||
}
|
||||
|
||||
/* Write to a single register of nrf24 */
|
||||
void nrf24_writeRegister(uint8_t reg, uint8_t *value, uint8_t len)
|
||||
{
|
||||
nrf24_csn_digitalWrite(LOW);
|
||||
spi_transfer(W_REGISTER | (REGISTER_MASK & reg));
|
||||
nrf24_transmitSync(value, len);
|
||||
nrf24_csn_digitalWrite(HIGH);
|
||||
}
|
||||
68
src/radioPinFunctions.c
Normal file
68
src/radioPinFunctions.c
Normal file
@ -0,0 +1,68 @@
|
||||
/*
|
||||
* ----------------------------------------------------------------------------
|
||||
* “THE COFFEEWARE LICENSE” (Revision 1):
|
||||
* <ihsan@kehribar.me> wrote this file. As long as you retain this notice you
|
||||
* can do whatever you want with this stuff. If we meet some day, and you think
|
||||
* this stuff is worth it, you can buy me a coffee in return.
|
||||
* -----------------------------------------------------------------------------
|
||||
* Please define your platform spesific functions in this file ...
|
||||
* -----------------------------------------------------------------------------
|
||||
*/
|
||||
|
||||
#include <avr/io.h>
|
||||
|
||||
#define set_bit(reg,bit) reg |= (1<<bit)
|
||||
#define clr_bit(reg,bit) reg &= ~(1<<bit)
|
||||
#define check_bit(reg,bit) (reg&(1<<bit))
|
||||
|
||||
/* ------------------------------------------------------------------------- */
|
||||
void nrf24_setupPins()
|
||||
{
|
||||
set_bit(DDRC, 0); // CE output
|
||||
set_bit(DDRC, 1); // CSN output
|
||||
set_bit(DDRC, 2); // SCK output
|
||||
set_bit(DDRC, 3); // MOSI output
|
||||
clr_bit(DDRC, 4); // MISO input
|
||||
}
|
||||
/* ------------------------------------------------------------------------- */
|
||||
void nrf24_ce_digitalWrite(uint8_t state)
|
||||
{
|
||||
if (state) {
|
||||
set_bit(PORTC, 0);
|
||||
} else {
|
||||
clr_bit(PORTC, 0);
|
||||
}
|
||||
}
|
||||
/* ------------------------------------------------------------------------- */
|
||||
void nrf24_csn_digitalWrite(uint8_t state)
|
||||
{
|
||||
if (state) {
|
||||
set_bit(PORTC, 1);
|
||||
} else {
|
||||
clr_bit(PORTC, 1);
|
||||
}
|
||||
}
|
||||
/* ------------------------------------------------------------------------- */
|
||||
void nrf24_sck_digitalWrite(uint8_t state)
|
||||
{
|
||||
if (state) {
|
||||
set_bit(PORTC, 2);
|
||||
} else {
|
||||
clr_bit(PORTC, 2);
|
||||
}
|
||||
}
|
||||
/* ------------------------------------------------------------------------- */
|
||||
void nrf24_mosi_digitalWrite(uint8_t state)
|
||||
{
|
||||
if (state) {
|
||||
set_bit(PORTC, 3);
|
||||
} else {
|
||||
clr_bit(PORTC, 3);
|
||||
}
|
||||
}
|
||||
/* ------------------------------------------------------------------------- */
|
||||
uint8_t nrf24_miso_digitalRead()
|
||||
{
|
||||
return check_bit(PINC, 4);
|
||||
}
|
||||
/* ------------------------------------------------------------------------- */
|
||||
Loading…
Reference in New Issue
Block a user