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I2C slave support (originally by bjoham) (#5226)

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* I2C slave support; resolving conflicts against current master

* removed unused argument, updateded to hopefully pass Travis

* cleaning up commit as requested by https://github.com/esp8266/Arduino/pull/5162#pullrequestreview-162242359

* cleaning up commit as requested by https://github.com/esp8266/Arduino/pull/5162#pullrequestreview-162242359

* type fix
This commit is contained in:
Matej Sychra
2018-10-26 17:04:16 +02:00
committed by Develo
parent 42c977bd4d
commit cb05b86d49
4 changed files with 894 additions and 90 deletions
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21
cores/esp8266/twi.h
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@ -1,9 +1,9 @@
/*
/*
twi.h - Software I2C library for esp8266
Copyright (c) 2015 Hristo Gochkov. All rights reserved.
This file is part of the esp8266 core for Arduino environment.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
@ -17,6 +17,7 @@
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Modified January 2017 by Bjorn Hammarberg (bjoham@esp8266.com) - i2c slave support
*/
#ifndef SI2C_h
#define SI2C_h
@ -32,7 +33,12 @@ extern "C" {
#define I2C_SDA_HELD_LOW 3
#define I2C_SDA_HELD_LOW_AFTER_INIT 4
#ifndef TWI_BUFFER_LENGTH
#define TWI_BUFFER_LENGTH 32
#endif
void twi_init(unsigned char sda, unsigned char scl);
void twi_setAddress(uint8_t);
void twi_stop(void);
void twi_setClock(unsigned int freq);
void twi_setClockStretchLimit(uint32_t limit);
@ -40,8 +46,17 @@ uint8_t twi_writeTo(unsigned char address, unsigned char * buf, unsigned int len
uint8_t twi_readFrom(unsigned char address, unsigned char * buf, unsigned int len, unsigned char sendStop);
uint8_t twi_status();
uint8_t twi_transmit(const uint8_t*, uint8_t);
void twi_attachSlaveRxEvent( void (*)(uint8_t*, size_t) );
void twi_attachSlaveTxEvent( void (*)(void) );
void twi_reply(uint8_t);
//void twi_stop(void);
void twi_releaseBus(void);
#ifdef __cplusplus
}
#endif
#endif
#endif