| /* |
| twi.h - TWI/I2C library for Wiring & Arduino |
| Copyright (c) 2006 Nicholas Zambetti. All right reserved. |
| |
| 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 |
| version 2.1 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| 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 |
| */ |
| |
| #ifndef twi_h |
| #define twi_h |
| |
| #include <inttypes.h> |
| |
| //#define ATMEGA8 |
| |
| #ifndef CPU_FREQ |
| #define CPU_FREQ 16000000L |
| #endif |
| |
| #ifndef TWI_FREQ |
| #define TWI_FREQ 100000L |
| #endif |
| |
| #ifndef TWI_BUFFER_LENGTH |
| #define TWI_BUFFER_LENGTH 32 |
| #endif |
| |
| #define TWI_READY 0 |
| #define TWI_MRX 1 |
| #define TWI_MTX 2 |
| #define TWI_SRX 3 |
| #define TWI_STX 4 |
| |
| void twi_init(void); |
| void twi_setAddress(uint8_t); |
| uint8_t twi_readFrom(uint8_t, uint8_t*, uint8_t); |
| uint8_t twi_writeTo(uint8_t, uint8_t*, uint8_t, uint8_t); |
| uint8_t twi_transmit(uint8_t*, uint8_t); |
| void twi_attachSlaveRxEvent( void (*)(uint8_t*, int) ); |
| void twi_attachSlaveTxEvent( void (*)(void) ); |
| void twi_reply(uint8_t); |
| void twi_stop(void); |
| void twi_releaseBus(void); |
| |
| #endif |
| |