hw/misc/tmp105.h

   1 /*
   2  * Texas Instruments TMP105 Temperature Sensor
   3  *
   4  * Browse the data sheet:
   5  *
   6  *    http://www.ti.com/lit/gpn/tmp105
   7  *
   8  * Copyright (C) 2012 Alex Horn <alex.horn@cs.ox.ac.uk>
   9  * Copyright (C) 2008-2012 Andrzej Zaborowski <balrogg@gmail.com>
  10  *
  11  * This work is licensed under the terms of the GNU GPL, version 2 or
  12  * later. See the COPYING file in the top-level directory.
  13  */
  14 #ifndef QEMU_TMP105_H
  15 #define QEMU_TMP105_H
  16
  17 #include "hw/i2c/i2c.h"
  18 #include "hw/misc/tmp105_regs.h"
  19 #include "qom/object.h"
  20
  21 #define TYPE_TMP105 "tmp105"
  22 OBJECT_DECLARE_SIMPLE_TYPE(TMP105State, TMP105)
  23
  24 /**
  25  * TMP105State:
  26  * @config: Bits 5 and 6 (value 32 and 64) determine the precision of the
  27  * temperature. See Table 8 in the data sheet.
  28  *
  29  * @see_also: http://www.ti.com/lit/gpn/tmp105
  30  */
  31 struct TMP105State {
  32     /*< private >*/
  33     I2CSlave i2c;
  34     /*< public >*/
  35
  36     uint8_t len;
  37     uint8_t buf[2];
  38     qemu_irq pin;
  39
  40     uint8_t pointer;
  41     uint8_t config;
  42     int16_t temperature;
  43     int16_t limit[2];
  44     int faults;
  45     uint8_t alarm;
  46     /*
  47      * The TMP105 initially looks for a temperature rising above T_high;
  48      * once this is detected, the condition it looks for next is the
  49      * temperature falling below T_low. This flag is false when initially
  50      * looking for T_high, true when looking for T_low.
  51      */
  52     bool detect_falling;
  53 };
  54
  55 #endif