80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
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/*
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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 <stdlib.h>
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#include "esp32-hal-spi.h"
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class SPISettings
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{
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public:
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SPISettings() :_clock(1000000), _bitOrder(SPI_MSBFIRST), _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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{
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public:
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SPIClass(uint8_t spi_bus=HSPI);
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void begin(int8_t sck=-1, int8_t miso=-1, int8_t mosi=-1, int8_t ss=-1);
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void end();
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void setHwCs(bool use);
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void setBitOrder(uint8_t bitOrder);
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void setDataMode(uint8_t dataMode);
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void setFrequency(uint32_t freq);
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void setClockDivider(uint32_t clockDiv);
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void beginTransaction(SPISettings settings);
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void endTransaction(void);
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uint8_t transfer(uint8_t data);
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uint16_t transfer16(uint16_t data);
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uint32_t transfer32(uint32_t data);
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void transferBytes(uint8_t * data, uint8_t * out, uint32_t size);
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void transferBits(uint32_t data, uint32_t * out, uint8_t bits);
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void write(uint8_t data);
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void write16(uint16_t data);
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void write32(uint32_t data);
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void writeBytes(uint8_t * data, uint32_t size);
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void writePattern(uint8_t * data, uint8_t size, uint32_t repeat);
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private:
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int8_t _spi_num;
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spi_t * _spi;
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bool _use_hw_ss;
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int8_t _sck;
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int8_t _miso;
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int8_t _mosi;
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int8_t _ss;
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uint32_t _div;
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uint32_t _freq;
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void writePattern_(uint8_t * data, uint8_t size, uint8_t repeat);
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};
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extern SPIClass SPI;
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#endif
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