NetBSD/sys/dev/i2c/lm75reg.h

79 lines
2.8 KiB
C

/* $NetBSD: lm75reg.h,v 1.1 2003/09/30 00:35:31 thorpej Exp $ */
/*
* Copyright (c) 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _DEV_I2C_LM75REG_H_
#define _DEV_I2C_LM75REG_H_
/*
* LM75 temperature sensor I2C address:
*
* 100 1xxx
*/
#define LM75_ADDRMASK 0x78
#define LM75_ADDR 0x48
/*
* Temperature on the LM75 is represented by a 9-bit two's complement
* integer in steps of 0.5C. The following examples are taken from
* the LM75 data sheet:
*
* +125C 0 1111 1010 0x0fa
* +25C 0 0011 0010 0x032
* +0.5C 0 0000 0001 0x001
* 0C 0 0000 0000 0x000
* -0.5C 1 1111 1111 0x1ff
* -25C 1 1100 1110 0x1ce
* -55C 1 1001 0010 0x192
*/
#define LM75_REG_TEMP 0x00
#define LM75_REG_CONFIG 0x01
#define LM75_REG_THYST_SET_POINT 0x02
#define LM75_REG_TOS_SET_POINT 0x03
#define LM75_TEMP_LEN 2 /* 2 data bytes */
#define LM75_CONFIG_SHUTDOWN 0x01
#define LM75_CONFIG_CMPINT 0x02
#define LM75_CONFIG_OSPOLARITY 0x04
#define LM75_CONFIG_FAULT_QUEUE_1 (0 << 3)
#define LM75_CONFIG_FAULT_QUEUE_2 (1 << 3)
#define LM75_CONFIG_FAULT_QUEUE_4 (2 << 3)
#define LM75_CONFIG_FAULT_QUEUE_6 (3 << 3)
#endif /* _DEV_I2C_LM75REG_H_ */