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89 lines
2.9 KiB
C++
89 lines
2.9 KiB
C++
/*
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SPI.h - SPI library for esp8266
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Copyright (c) 2015 Hristo Gochkov. All rights reserved.
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This file is part of the esp8266 core for Arduino environment.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _SPI_H_INCLUDED
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#define _SPI_H_INCLUDED
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#include <Arduino.h>
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#include <stdlib.h>
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#define FCPU80 80000000L
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#if F_CPU == FCPU80
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#define SPI_CLOCK_DIV80M 0x80000000 //80 MHz
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#define SPI_CLOCK_DIV40M 0x00001001 //40 MHz
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#define SPI_CLOCK_DIV20M 0x00041001 //20 MHz
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#define SPI_CLOCK_DIV16M 0x000fffc0 //16 MHz
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#define SPI_CLOCK_DIV10M 0x000c1001 //10 MHz
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#define SPI_CLOCK_DIV2 0x00101001 //8 MHz
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#define SPI_CLOCK_DIV5M 0x001c1001 //5 MHz
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#define SPI_CLOCK_DIV4 0x00241001 //4 MHz
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#define SPI_CLOCK_DIV8 0x004c1001 //2 MHz
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#define SPI_CLOCK_DIV16 0x009c1001 //1 MHz
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#define SPI_CLOCK_DIV32 0x013c1001 //500 KHz
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#define SPI_CLOCK_DIV64 0x027c1001 //250 KHz
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#define SPI_CLOCK_DIV128 0x04fc1001 //125 KHz
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#else
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#define SPI_CLOCK_DIV160M 0x80000000 //160 MHz
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#define SPI_CLOCK_DIV80M 0x00001001 //80 MHz
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#define SPI_CLOCK_DIV40M 0x00041001 //40 MHz
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#define SPI_CLOCK_DIV32M 0x000fffc0 //32 MHz
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#define SPI_CLOCK_DIV20M 0x000c1001 //20 MHz
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#define SPI_CLOCK_DIV16M 0x00101001 //16 MHz
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#define SPI_CLOCK_DIV10M 0x001c1001 //10 MHz
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#define SPI_CLOCK_DIV2 0x00241001 //8 MHz
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#define SPI_CLOCK_DIV4 0x004c1001 //4 MHz
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#define SPI_CLOCK_DIV8 0x009c1001 //2 MHz
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#define SPI_CLOCK_DIV16 0x013c1001 //1 MHz
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#define SPI_CLOCK_DIV32 0x027c1001 //500 KHz
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#define SPI_CLOCK_DIV64 0x04fc1001 //250 KHz
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#endif
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const uint8_t SPI_MODE0 = 0x00;
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const uint8_t SPI_MODE1 = 0x04;
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const uint8_t SPI_MODE2 = 0x08;
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const uint8_t SPI_MODE3 = 0x0C;
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class SPISettings {
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public:
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SPISettings() :_clock(SPI_CLOCK_DIV16), _bitOrder(LSBFIRST), _dataMode(SPI_MODE0){}
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SPISettings(uint32_t clock, uint8_t bitOrder, uint8_t dataMode) :_clock(clock), _bitOrder(bitOrder), _dataMode(dataMode){}
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uint32_t _clock;
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uint8_t _bitOrder;
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uint8_t _dataMode;
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};
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class SPIClass {
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public:
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SPIClass();
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void begin();
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void end();
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void setBitOrder(uint8_t bitOrder);
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void setDataMode(uint8_t dataMode);
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void setClockDivider(uint32_t clockDiv);
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void beginTransaction(SPISettings settings);
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uint8_t transfer(uint8_t data);
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void endTransaction(void);
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};
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extern SPIClass SPI;
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#endif
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