/* * Copyright (c) 2010 by Cristian Maglie <c.maglie@bug.st> * SPI Master library for arduino. * * This file is free software; you can redistribute it and/or modify * it under the terms of either the GNU General Public License version 2 * or the GNU Lesser General Public License version 2.1, both as * published by the Free Software Foundation. */ #ifndef _SPI_H_INCLUDED #define _SPI_H_INCLUDED #include <stdio.h> #include <Arduino.h> #include <avr/pgmspace.h> #define SPI_CLOCK_DIV4 0x00 #define SPI_CLOCK_DIV16 0x01 #define SPI_CLOCK_DIV64 0x02 #define SPI_CLOCK_DIV128 0x03 #define SPI_CLOCK_DIV2 0x04 #define SPI_CLOCK_DIV8 0x05 #define SPI_CLOCK_DIV32 0x06 //#define SPI_CLOCK_DIV64 0x07 #define SPI_MODE0 0x00 #define SPI_MODE1 0x04 #define SPI_MODE2 0x08 #define SPI_MODE3 0x0C #define SPI_MODE_MASK 0x0C // CPOL = bit 3, CPHA = bit 2 on SPCR #define SPI_CLOCK_MASK 0x03 // SPR1 = bit 1, SPR0 = bit 0 on SPCR #define SPI_2XCLOCK_MASK 0x01 // SPI2X = bit 0 on SPSR class SPIClass { public: inline static byte transfer(byte _data); // SPI Configuration methods inline static void attachInterrupt(); inline static void detachInterrupt(); // Default static void begin(); // Default static void end(); static void setBitOrder(uint8_t); static void setDataMode(uint8_t); static void setClockDivider(uint8_t); }; extern SPIClass SPI; byte SPIClass::transfer(byte _data) { SPDR = _data; while (!(SPSR & _BV(SPIF))) ; return SPDR; } void SPIClass::attachInterrupt() { SPCR |= _BV(SPIE); } void SPIClass::detachInterrupt() { SPCR &= ~_BV(SPIE); } #endif