iLLD_TC27xD  1.0
IfxDts_Dts.c
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1 /**
2  * \file IfxDts_Dts.c
3  * \brief DTS DTS details
4  *
5  * \version iLLD_1_0_0_11_0
6  * \copyright Copyright (c) 2013 Infineon Technologies AG. All rights reserved.
7  *
8  *
9  * IMPORTANT NOTICE
10  *
11  *
12  * Infineon Technologies AG (Infineon) is supplying this file for use
13  * exclusively with Infineon's microcontroller products. This file can be freely
14  * distributed within development tools that are supporting such microcontroller
15  * products.
16  *
17  * THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
18  * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
20  * INFINEON SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL,
21  * OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
22  *
23  */
24 
25 /******************************************************************************/
26 /*----------------------------------Includes----------------------------------*/
27 /******************************************************************************/
28 
29 #include "IfxDts_Dts.h"
30 
31 /******************************************************************************/
32 /*-------------------------Function Implementations---------------------------*/
33 /******************************************************************************/
34 
35 uint16 IfxDts_Dts_convertFromCelsius(float32 temperatureValue)
36 {
37  sint32 dtsValue = (sint32)(temperatureValue + 285.5) / 0.467;
38 
39  if (dtsValue < 0)
40  {
41  dtsValue = 0;
42  }
43  else if (dtsValue > 1023)
44  {
45  dtsValue = 1023;
46  }
47 
48  return (uint16)dtsValue;
49 }
50 
51 
52 float32 IfxDts_Dts_convertToCelsius(uint16 dtsValue)
53 {
54  return ((float32)dtsValue * 0.467) - 285.5;
55 }
56 
57 
58 void IfxDts_Dts_initModule(const IfxDts_Dts_Config *config)
59 {
60  IfxDts_enableSensor();
61 
62  /* wait for two measurements before enabling the limits */
63  {
64  int i;
65 
66  /* disable limits */
67  MODULE_SCU.DTSLIM.B.LOWER = 0;
68  MODULE_SCU.DTSLIM.B.UPPER = 1023;
69 
70  /* wait until DTS is ready */
71  while (!IfxDts_isReady())
72  {}
73 
74  /* two dummy measurements */
75  for (i = 0; i < 2; ++i)
76  {
77  IfxDts_Dts_startSensor();
78 
79  while (IfxDts_Dts_isBusy())
80  {}
81  }
82  }
83 
84  /* change to the requested limits */
85  MODULE_SCU.DTSLIM.B.LOWER = IfxDts_Dts_convertFromCelsius(config->lowerTemperatureLimit);
86  MODULE_SCU.DTSLIM.B.UPPER = IfxDts_Dts_convertFromCelsius(config->upperTemperatureLimit);
87 
88  /* lock configuration? */
89  if (config->enableSecureLock == TRUE)
90  {
91  IfxDts_disableSensorControl();
92  }
93  else
94  {
95  /* do Nothing */
96  }
97 
98  /* enable DTS IRQ */
99  if (config->isrPriority > 0)
100  {
101  volatile Ifx_SRC_SRCR *src = IfxDts_getSrcPointer();
102  IfxSrc_init(src, config->isrTypeOfService, config->isrPriority);
103  IfxSrc_enable(src);
104  }
105 }
106 
107 
108 void IfxDts_Dts_initModuleConfig(IfxDts_Dts_Config *config)
109 {
110  config->sensorControlDisabled = FALSE;
111  config->lowerTemperatureLimit = -40.0; // Celsius
112  config->upperTemperatureLimit = 170.0; // Celsius
113 
114  config->isrTypeOfService = IfxSrc_Tos_cpu0;
115  config->isrPriority = 0;
116 
117  config->enableSecureLock = FALSE;
118 }