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86cfeb5232
Each TMP006 temperature sensor has different sensitivity factor. Let's add a field to set different sensitivity factor for each sensor. Also update the factors to get more reasonable temperature readings, but still need more precise calibration. BUG=chrome-os-partner:9599 TEST=Build and read tempearture succeeded. Change-Id: Ib4feea3b78b71f6d37c9a02668ffa7bd9e63d390
33 lines
924 B
C
33 lines
924 B
C
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* TMP006 temperature sensor module for Chrome EC */
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#ifndef __CROS_EC_TMP006_H
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#define __CROS_EC_TMP006_H
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#define TMP006_ADDR(PORT,REG) ((PORT << 16) + REG)
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#define TMP006_PORT(ADDR) (ADDR >> 16)
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#define TMP006_REG(ADDR) (ADDR & 0xffff)
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struct tmp006_t {
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const char* name;
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/* I2C address formed by TMP006_ADDR macro. */
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int addr;
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/* Sensitivity factor, in 10^11. */
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int sens;
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};
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/* Poll all TMP006 sensors. Return 0 on success. */
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int tmp006_poll(void);
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/* Get the last polled value of a sensor. Return temperature in K.
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* The low bit in idx indicate whether to read die temperature or
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* object temperature. The other bits serve as internal index to tmp006
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* module. */
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int tmp006_get_val(int idx);
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#endif /* __CROS_EC_TMP006_H */
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