1 /* $NetBSD: lm75reg.h,v 1.6 2025/08/25 04:31:18 macallan Exp $ */ 2 3 /* 4 * Copyright (c) 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #ifndef _DEV_I2C_LM75REG_H_ 39 #define _DEV_I2C_LM75REG_H_ 40 41 /* 42 * LM75 temperature sensor I2C address: 43 * 44 * 100 1xxx 45 */ 46 #define LM75_ADDRMASK 0x3f8 47 #define LM75_ADDR 0x48 48 #define LM77_ADDRMASK 0x3fc 49 #define LM77_ADDR 0x48 50 51 /* 52 * Temperature on the LM75 is represented by a 9-bit two's complement 53 * integer in steps of 0.5C. The following examples are taken from 54 * the LM75 data sheet: 55 * 56 * +125C 0 1111 1010 0x0fa 57 * +25C 0 0011 0010 0x032 58 * +0.5C 0 0000 0001 0x001 59 * 0C 0 0000 0000 0x000 60 * -0.5C 1 1111 1111 0x1ff 61 * -25C 1 1100 1110 0x1ce 62 * -55C 1 1001 0010 0x192 63 */ 64 65 #define LM75_REG_TEMP 0x00 66 #define LM75_REG_CONFIG 0x01 67 #define LM75_REG_THYST_SET_POINT 0x02 68 #define LM75_REG_TOS_SET_POINT 0x03 69 #define LM75_REG_ID 0x07 /* LM75A only */ 70 71 #define LM77_REG_TCRIT_SET_POINT 0x03 72 #define LM77_REG_TLOW_SET_POINT 0x04 73 #define LM77_REG_THIGH_SET_POINT 0x05 74 75 76 #define LM75_TEMP_LEN 2 /* 2 data bytes */ 77 78 #define LM75_CONFIG_SHUTDOWN 0x01 79 #define LM75_CONFIG_CMPINT 0x02 80 #define LM75_CONFIG_OSPOLARITY 0x04 81 #define LM75_CONFIG_FAULT_QUEUE_1 (0 << 3) 82 #define LM75_CONFIG_FAULT_QUEUE_2 (1 << 3) 83 #define LM75_CONFIG_FAULT_QUEUE_4 (2 << 3) 84 #define LM75_CONFIG_FAULT_QUEUE_6 (3 << 3) 85 86 #define DS75_CONFIG_RES_9BIT (0 << 5) 87 #define DS75_CONFIG_RES_10BIT (1 << 5) 88 #define DS75_CONFIG_RES_11BIT (2 << 5) 89 #define DS75_CONFIG_RES_12BIT (3 << 5) 90 91 #define LM77_CONFIG_TCRITAPOLARITY 0x04 92 #define LM77_CONFIG_INTPOLARITY 0x08 93 #define LM77_CONFIG_FAULT_QUEUE LM75_CONFIG_FAULT_QUEUE_4 94 95 #endif /* _DEV_I2C_LM75REG_H_ */ 96
Indexes created Sat Sep 20 22:09:52 GMT 2025