00001 /* Copyright (c) 2002, Marek Michalkiewicz 00002 All rights reserved. 00003 00004 Redistribution and use in source and binary forms, with or without 00005 modification, are permitted provided that the following conditions are met: 00006 00007 * Redistributions of source code must retain the above copyright 00008 notice, this list of conditions and the following disclaimer. 00009 * Redistributions in binary form must reproduce the above copyright 00010 notice, this list of conditions and the following disclaimer in 00011 the documentation and/or other materials provided with the 00012 distribution. 00013 00014 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 00015 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00016 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00017 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 00018 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 00019 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 00020 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00021 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00022 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 00023 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 00024 POSSIBILITY OF SUCH DAMAGE. */ 00025 00026 /* 00027 avr/twi.h - definitions for TWI: Two-Wire Interface or Twi Was I2c(tm). 00028 00029 Contributors: 00030 Created by Marek Michalkiewicz <marekm@linux.org.pl> 00031 00032 Based on advance information Atmel datasheet Rev. 1142A-10/00 (ATmega163). 00033 */ 00034 00035 #ifndef _AVR_TWI_H_ 00036 #define _AVR_TWI_H_ 1 00037 00038 /* TWSR values (not bits) */ 00039 /* Master */ 00040 #define TW_START 0x08 00041 #define TW_REP_START 0x10 00042 /* Master Transmitter */ 00043 #define TW_MT_SLA_ACK 0x18 00044 #define TW_MT_SLA_NACK 0x20 00045 #define TW_MT_DATA_ACK 0x28 00046 #define TW_MT_DATA_NACK 0x30 00047 #define TW_MT_ARB_LOST 0x38 00048 /* Master Receiver */ 00049 #define TW_MR_ARB_LOST 0x38 00050 #define TW_MR_SLA_ACK 0x40 00051 #define TW_MR_SLA_NACK 0x48 00052 #define TW_MR_DATA_ACK 0x50 00053 #define TW_MR_DATA_NACK 0x58 00054 /* Slave Transmitter */ 00055 #define TW_ST_SLA_ACK 0xA8 00056 #define TW_ST_ARB_LOST_SLA_ACK 0xB0 00057 #define TW_ST_DATA_ACK 0xB8 00058 #define TW_ST_DATA_NACK 0xC0 00059 #define TW_ST_LAST_DATA 0xC8 00060 /* Slave Receiver */ 00061 #define TW_SR_SLA_ACK 0x60 00062 #define TW_SR_ARB_LOST_SLA_ACK 0x68 00063 #define TW_SR_GCALL_ACK 0x70 00064 #define TW_SR_ARB_LOST_GCALL_ACK 0x78 00065 #define TW_SR_DATA_ACK 0x80 00066 #define TW_SR_DATA_NACK 0x88 00067 #define TW_SR_GCALL_DATA_ACK 0x90 00068 #define TW_SR_GCALL_DATA_NACK 0x98 00069 #define TW_SR_STOP 0xA0 00070 /* Misc */ 00071 #define TW_NO_INFO 0xF8 00072 #define TW_BUS_ERROR 0x00 00073 00074 #endif /* _AVR_TWI_H_ */
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