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This commit is contained in:
Erik Tylek Kettenburg
2015-06-23 12:42:35 -07:00
parent bc55c9bb45
commit 6ca6b114d5
3581 changed files with 93 additions and 51 deletions
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83
digistump-avr/cores/pro/TinySoftwareSPI.h Normal file
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/*
* Copyright (c) 2012 by Thomas Carpenter
* Software based SPI Master Library for Tiny core.
*
* 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
//Uses the same guard as the SPI class as the two cannot be used together
#define _SPI_H_INCLUDED
#include <stdio.h>
#include <Arduino.h>
#define SPI_MODE0 0
#define SPI_MODE1 1
#define SPI_MODE2 2
#define SPI_MODE3 3
#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
class SoftSPIClass;
typedef byte (SoftSPIClass::*TransferFunction)(byte _data);
class SoftSPIClass {
public:
SoftSPIClass();
private:
TransferFunction transferType;
byte noTransfer(byte _data);
byte transferMode0(byte _data);
byte transferMode1(byte _data);
byte transferMode2(byte _data);
byte transferMode3(byte _data);
public:
byte transfer(byte _data);
// SPI Configuration methods
#if defined(SS) && defined(MOSI) && defined(MISO) && defined(SCK)
void begin(); // Default to the preset SPI pins
#endif
void begin(byte SCK_, byte MOSI_, byte MISO_, byte SS_); //No SS specified, so require pin designation
void end();
void setBitOrder(uint8_t);
void setDataMode(uint8_t);
void setClockDivider(uint8_t);
void writeSS(boolean state);
private:
byte _rate;
byte _bitOrder;
byte _mode;
boolean _running;
byte _SS;
byte _SCK;
byte _MISO;
byte _MOSI;
volatile uint8_t* _MOSI_PORT;
volatile uint8_t* _SS_PORT;
volatile uint8_t* _SCK_PORT;
volatile uint8_t* _MISO_PIN;
byte _SS_HIGH;
byte _MOSI_HIGH;
byte _SCK_HIGH;
byte _SS_LOW;
byte _MOSI_LOW;
byte _SCK_LOW;
byte _MISO_MASK;
};
extern SoftSPIClass SPI;
#endif