SPI.h
70 lines
| 1.6 KiB
| text/x-c
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CLexer
aaguilar
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r132 | /* | ||
| * 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 | ||||