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- /*
- * The MySensors Arduino library handles the wireless radio link and protocol
- * between your home built sensors/actuators and HA controller of choice.
- * The sensors forms a self healing radio network with optional repeaters. Each
- * repeater and gateway builds a routing tables in EEPROM which keeps track of the
- * network topology allowing messages to be routed to nodes.
- *
- * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
- * Copyright (C) 2013-2018 Sensnology AB
- * Full contributor list: https://github.com/mysensors/MySensors/graphs/contributors
- *
- * Documentation: http://www.mysensors.org
- * Support Forum: http://forum.mysensors.org
- *
- * 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.
- *
- * Based on TMRh20 RF24 library, Copyright (c) 2015 Charles-Henri Hallard <tmrh20@gmail.com>
- */
-
- #ifndef SPIDEV_h
- #define SPIDEV_h
-
- #include <stdint.h>
- #include <string>
- #include <linux/spi/spidev.h>
-
- #define SPI_HAS_TRANSACTION
-
- #define MSBFIRST 0
- #define LSBFIRST SPI_LSB_FIRST
-
- #define SPI_CLOCK_BASE 16000000 // 16Mhz
-
- #define SPI_CLOCK_DIV1 1
- #define SPI_CLOCK_DIV2 2
- #define SPI_CLOCK_DIV4 4
- #define SPI_CLOCK_DIV8 8
- #define SPI_CLOCK_DIV16 16
- #define SPI_CLOCK_DIV32 32
- #define SPI_CLOCK_DIV64 64
- #define SPI_CLOCK_DIV128 128
- #define SPI_CLOCK_DIV256 256
-
- // SPI Data mode
- #define SPI_MODE0 SPI_MODE_0
- #define SPI_MODE1 SPI_MODE_1
- #define SPI_MODE2 SPI_MODE_2
- #define SPI_MODE3 SPI_MODE_3
-
- #ifndef SPI_SPIDEV_DEVICE
- #define SPI_SPIDEV_DEVICE "/dev/spidev0.0"
- #endif
-
- // Default to Raspberry Pi
- const uint8_t SS = 24;
- const uint8_t MOSI = 19;
- const uint8_t MISO = 21;
- const uint8_t SCK = 23;
-
- /**
- * SPISettings class
- */
- class SPISettings
- {
-
- public:
- /**
- * @brief SPISettings constructor.
- */
- SPISettings()
- {
- init(SPI_CLOCK_BASE, MSBFIRST, SPI_MODE0);
- }
- /**
- * @brief SPISettings constructor.
- *
- * @param clock SPI clock speed in Hz.
- * @param bitOrder SPI bit order.
- * @param dataMode SPI data mode.
- */
- SPISettings(uint32_t clock, uint8_t bitOrder, uint8_t dataMode)
- {
- init(clock, bitOrder, dataMode);
- }
-
- uint32_t clock; //!< @brief SPI clock.
- uint8_t border; //!< @brief SPI bit order.
- uint8_t dmode; //!< @brief SPI data mode.
-
- private:
- /**
- * @brief Initialized class members.
- *
- * @param clk SPI clock.
- * @param bitOrder SPI bit order.
- * @param dataMode SPI data mode.
- */
- void init(uint32_t clk, uint8_t bitOrder, uint8_t dataMode)
- {
- clock = clk;
- border = bitOrder;
- dmode = dataMode;
- }
-
- friend class SPIDEVClass;
- };
-
- /**
- * SPIDEV class
- */
- class SPIDEVClass
- {
-
- public:
- /**
- * @brief SPIDEVClass constructor.
- */
- SPIDEVClass();
- /**
- * @brief Start SPI operations.
- */
- static void begin(int busNo=0);
- /**
- * @brief End SPI operations.
- */
- static void end();
- /**
- * @brief Sets the SPI bit order.
- *
- * @param bit_order The desired bit order.
- */
- static void setBitOrder(uint8_t bit_order);
- /**
- * @brief Sets the SPI data mode.
- *
- * @param data_mode The desired data mode.
- */
- static void setDataMode(uint8_t data_mode);
- /**
- * @brief Sets the SPI clock divider and therefore the SPI clock speed.
- *
- * @param divider The desired SPI clock divider.
- */
- static void setClockDivider(uint16_t divider);
- /**
- * @brief Sets the chip select pin.
- *
- * @param csn_chip Specifies the CS chip.
- */
- static void chipSelect(int csn_chip);
- /**
- * @brief Transfer a single byte
- *
- * @param data Byte to send
- * @return Data returned via spi
- */
- static uint8_t transfer(uint8_t data);
- /**
- * @brief Transfer a buffer of data
- *
- * @param tbuf Transmit buffer
- * @param rbuf Receive buffer
- * @param len Length of the data
- */
- static void transfernb(char* tbuf, char* rbuf, uint32_t len);
- /**
- * @brief Transfer a buffer of data without an rx buffer
- *
- * @param buf Pointer to a buffer of data
- * @param len Length of the data
- */
- static void transfern(char* buf, uint32_t len);
- /**
- * @brief Start SPI transaction.
- *
- * @param settings for SPI.
- */
- static void beginTransaction(SPISettings settings);
- /**
- * @brief End SPI transaction.
- */
- static void endTransaction();
- /**
- * @brief Not implemented.
- *
- * @param interruptNumber ignored parameter.
- */
- static void usingInterrupt(uint8_t interruptNumber);
- /**
- * @brief Not implemented.
- *
- * @param interruptNumber ignored parameter.
- */
- static void notUsingInterrupt(uint8_t interruptNumber);
-
- private:
- static uint8_t initialized; //!< @brief SPI initialized flag.
- static int fd; //!< @brief SPI device file descriptor.
- static std::string device; //!< @brief Default SPI device.
- static uint8_t mode; //!< @brief SPI mode.
- static uint32_t speed; //!< @brief SPI speed.
- static uint8_t bit_order; //!< @brief SPI bit order.
- static struct spi_ioc_transfer tr; //!< @brief Auxiliar struct for data transfer.
-
- static void init();
- };
-
- extern SPIDEVClass SPIDEV;
-
- #endif
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