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tmp105.h (1365B)

      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/sensor/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