/* $OpenBSD: lm75reg.h,v 1.1 2004/05/23 18:12:37 grange Exp $ */ /* $NetBSD: lm75reg.h,v 1.1 2003/09/30 00:35:31 thorpej Exp $ */ /* * Copyright (c) 2004 Alexander Yurchenko <grange@openbsd.org> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /* * 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_ #define LM_MODEL_LM75 1 #define LM_MODEL_LM77 2 #define LM_POLLTIME (hz * 2) /* 2s */ /* * LM75 temperature sensor I2C address: * * 100 1xxx */ #define LM75_ADDRMASK 0x78 #define LM75_ADDR 0x48 /* * LM77 temperature sensor I2C address: * * 100 10xx */ #define LM77_ADDRMASK 0x7c #define LM77_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 * * Temperature on the LM77 is represented by a 10-bit two's complement * integer in steps of 0.5C: * * +130C 01 0000 0100 0x104 * +125C 00 1111 1010 0x0fa * +25C 00 0011 0010 0x032 * +0.5C 00 0000 0001 0x001 * 0C 00 0000 0000 0x000 * -0.5C 11 1111 1111 0x3ff * -25C 11 1100 1110 0x3ce * -55C 11 1001 0010 0x392 */ #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 LM77_REG_TLOW 0x04 #define LM77_REG_THIGH 0x05 #define LM77_TEMP_ST_LOW 0x01 #define LM77_TEMP_ST_HIGH 0x02 #define LM77_TEMP_ST_CRIT 0x04 #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) #define LM77_CONFIG_INTPOLARITY 0x08 #define LM77_CONFIG_FAULT_QUEUE_4 0x10 /* * LM75 temperature word: * * MSB Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 X X X X X X X * 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 * * * LM77 temperature word: * * Sign Sign Sign Sign MSB Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Status bits * 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 */ static __inline int lm75_wordtotemp(u_int16_t word) { return ((int16_t)word / 128); } static __inline u_int16_t lm75_temptoword(int temp) { int sign = 0; if (temp < 0) { sign = 1; temp = -temp; }; return ((sign << 15 ) | ((temp & 0xff) << 7)); } static __inline int lm77_wordtotemp(u_int16_t word) { return ((int16_t)word / 8); } static __inline u_int16_t lm77_temptoword(int temp) { int sign = 0; if (temp < 0) { sign = 0xf; temp = -temp; }; return ((sign << 12 ) | ((temp & 0x1ff) << 3)); } #endif /* _DEV_I2C_LM75REG_H_ */