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Master-only TwoWire class for LPC1768

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This commit is contained in:
Thomas Moore
2017-11-09 21:46:26 -06:00
committed by Scott Lahteine
parent d5bf9e74c4
commit 6856eccc77
3 changed files with 275 additions and 26 deletions
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62
Marlin/src/HAL/HAL_LPC1768/include/Wire.h
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@ -1,4 +1,4 @@
/*
/**
* TwoWire.h - TWI/I2C library for Arduino & Wiring
* Copyright (c) 2006 Nicholas Zambetti. All right reserved.
*
@ -19,39 +19,49 @@
* Modified 2012 by Todd Krein (todd@krein.org) to implement repeated starts
*/
// Modified for use with the mcp4451 digipot routine
#ifdef TARGET_LPC1768
#ifndef TwoWire_h
#define TwoWire_h
#ifndef _TWOWIRE_H_
#define _TWOWIRE_H_
#include <inttypes.h>
#define BUFFER_LENGTH 32
class TwoWire {
private:
static uint8_t rxBuffer[];
static uint8_t rxBufferIndex;
static uint8_t rxBufferLength;
static uint8_t txAddress;
static uint8_t txBuffer[];
static uint8_t txBufferIndex;
static uint8_t txBufferLength;
static uint8_t transmitting;
public:
//TwoWire();
TwoWire();
void begin();
void beginTransmission(uint8_t);
void beginTransmission(int);
uint8_t endTransmission(void);
size_t write(uint8_t);
uint8_t endTransmission(uint8_t);
uint8_t requestFrom(uint8_t, uint8_t);
uint8_t requestFrom(int, int);
virtual size_t write(uint8_t);
virtual size_t write(const uint8_t *, size_t);
virtual int available(void);
virtual int read(void);
virtual int peek(void);
inline size_t write(unsigned long n) { return write((uint8_t)n); }
inline size_t write(long n) { return write((uint8_t)n); }
inline size_t write(unsigned int n) { return write((uint8_t)n); }
inline size_t write(int n) { return write((uint8_t)n); }
};
//extern TwoWire Wire;
extern TwoWire Wire;
TwoWire Wire;
////////////////////////////////////////////////////////////////////////////////////////
extern "C" uint8_t digipot_mcp4451_start(uint8_t sla);
extern "C" void digipot_mcp4451_init(void);
extern "C" uint8_t digipot_mcp4451_send_byte(uint8_t data);
void TwoWire::beginTransmission(uint8_t sla) { digipot_mcp4451_start(sla);}
void TwoWire::begin(void) {digipot_mcp4451_init();}
size_t TwoWire::write(uint8_t data) {return digipot_mcp4451_send_byte(data);}
uint8_t TwoWire::endTransmission(void) {return 1;}
#endif
#endif // TARGET_LPC1768
#endif // _TWOWIRE_H_