91 lines
3.2 KiB
C
91 lines
3.2 KiB
C
/* $NetBSD: lm75reg.h,v 1.5 2016/01/03 17:28:33 jdc Exp $ */
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/*
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* Copyright (c) 2003 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _DEV_I2C_LM75REG_H_
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#define _DEV_I2C_LM75REG_H_
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/*
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* LM75 temperature sensor I2C address:
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*
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* 100 1xxx
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*/
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#define LM75_ADDRMASK 0x3f8
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#define LM75_ADDR 0x48
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#define LM77_ADDRMASK 0x3fc
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#define LM77_ADDR 0x48
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/*
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* Temperature on the LM75 is represented by a 9-bit two's complement
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* integer in steps of 0.5C. The following examples are taken from
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* the LM75 data sheet:
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*
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* +125C 0 1111 1010 0x0fa
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* +25C 0 0011 0010 0x032
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* +0.5C 0 0000 0001 0x001
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* 0C 0 0000 0000 0x000
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* -0.5C 1 1111 1111 0x1ff
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* -25C 1 1100 1110 0x1ce
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* -55C 1 1001 0010 0x192
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*/
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#define LM75_REG_TEMP 0x00
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#define LM75_REG_CONFIG 0x01
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#define LM75_REG_THYST_SET_POINT 0x02
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#define LM75_REG_TOS_SET_POINT 0x03
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#define LM75_REG_ID 0x07 /* LM75A only */
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#define LM77_REG_TCRIT_SET_POINT 0x03
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#define LM77_REG_TLOW_SET_POINT 0x04
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#define LM77_REG_THIGH_SET_POINT 0x05
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#define LM75_TEMP_LEN 2 /* 2 data bytes */
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#define LM75_CONFIG_SHUTDOWN 0x01
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#define LM75_CONFIG_CMPINT 0x02
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#define LM75_CONFIG_OSPOLARITY 0x04
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#define LM75_CONFIG_FAULT_QUEUE_1 (0 << 3)
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#define LM75_CONFIG_FAULT_QUEUE_2 (1 << 3)
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#define LM75_CONFIG_FAULT_QUEUE_4 (2 << 3)
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#define LM75_CONFIG_FAULT_QUEUE_6 (3 << 3)
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#define LM77_CONFIG_TCRITAPOLARITY 0x04
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#define LM77_CONFIG_INTPOLARITY 0x08
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#define LM77_CONFIG_FAULT_QUEUE LM75_CONFIG_FAULT_QUEUE_4
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#endif /* _DEV_I2C_LM75REG_H_ */
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