1 | // https://github.com/ms-iotkithol-jp/IoTKitHoLV3/blob/master/PinKitIoTHubApp/PinKitIoTHubApp/PinKit/Temperature.cs
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2 |
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3 | #include <math.h>
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4 | #include <kernel.h>
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5 | #include <t_syslog.h>
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6 | #include <target_syssvc.h>
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7 | #include "pinkit.h"
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8 | #include "kernel_cfg.h"
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9 |
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10 | ADC_Handle_t *aiTemperature;
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11 |
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12 | // Adjust VR1 - Default 5000Ω
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13 | double VR1;
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14 |
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15 | // B constant - Default 3435Ω
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16 | double Bc;
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17 |
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18 | volatile uint16_t TemperatureValue;
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19 |
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20 | /*
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21 | * ADC転送終了コールバック関数
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22 | */
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23 | static void HAL_ADC_ConvCpltCallback2(ADC_Handle_t* hadc)
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24 | {
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25 | TemperatureValue = adc_getvalue(aiTemperature);
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26 | adc_end_int(hadc);
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27 | }
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28 |
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29 | bool Temperature_Init()
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30 | {
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31 | ADC_Init_t aInit;
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32 | ADC_ChannelConf_t sConfig;
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33 | uint32_t event = 0;
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34 | int i;
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35 | Arduino_PortControlBlock *pcb;
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36 |
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37 | VR1 = 5000.0;
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38 | Bc = 3435.0;
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39 |
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40 | /*
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41 | * ADC5初期化
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42 | */
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43 | aInit.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;
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44 | aInit.Resolution = ADC_RESOLUTION_12B;
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45 | aInit.ScanConvMode = ADC_SCANMODE_DISABLE;
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46 | aInit.ContinuousConvMode = ADC_CONTINUOUS_ENABLE;
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47 | aInit.DiscontinuousConvMode = ADC_DISCONTINUOUS_DISABLE;
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48 | aInit.NumDiscConversion = 0;
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49 | aInit.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
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50 | aInit.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
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51 | aInit.DataAlign = ADC_DATAALIGN_RIGHT;
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52 | aInit.NumConversion = 1;
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53 | aInit.DMAContinuousRequests = ADC_DMACONTINUOUS_DISABLE;
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54 | aInit.EOCSelection = ADC_EOC_SEQ_DISABLE;
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55 |
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56 | if((aiTemperature = adc_init(ADC3_PORTID, &aInit)) == NULL){
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57 | /* Initialization Error */
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58 | syslog_0(LOG_ERROR, "## adc_init ERROR ##");
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59 | return false;
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60 | }
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61 | aiTemperature->xfercallback = HAL_ADC_ConvCpltCallback2;
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62 |
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63 | /*
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64 | * ADCチャネル設定
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65 | */
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66 | pcb = getGpioTable(ANALOG_PIN, 5);
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67 | sConfig.Channel = ADC_CHANNEL_8;
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68 | sConfig.Rank = 1;
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69 | sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
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70 | sConfig.GpioBase = pcb->giobase;
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71 | sConfig.GpioPin = pcb->giopin;
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72 | if(adc_setupchannel(aiTemperature, &sConfig) != E_OK){
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73 | /* Channel Configuration Error */
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74 | syslog_0(LOG_ERROR, "## adc_setupchannel ERROR ##");
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75 | return false;
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76 | }
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77 |
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78 | /*
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79 | * ADC DMAスタート
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80 | */
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81 | if(adc_start_int(aiTemperature) != E_OK){
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82 | /* Start Conversation Error */
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83 | syslog_0(LOG_ERROR, "## adc_start_int ERROR ##");
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84 | return false;
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85 | }
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86 |
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87 | return true;
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88 | }
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89 |
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90 | bool Temperature_Start()
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91 | {
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92 | if (aiTemperature->status >= ADC_STATUS_EOC)
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93 | return false;
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94 |
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95 | /*
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96 | * ADC DMAスタート
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97 | */
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98 | if(adc_start_int(aiTemperature) != E_OK){
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99 | /* Start Conversation Error */
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100 | syslog_0(LOG_NOTICE, "## adc_start_int ERROR ##");
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101 | return false;
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102 | }
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103 |
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104 | return true;
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105 | }
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106 |
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107 | double Temperature_TakeMeasurement()
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108 | {
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109 | if (aiTemperature == NULL)
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110 | return -273.15;
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111 |
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112 | int raw = TemperatureValue << (16 - 12);
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113 |
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114 | double tk = 273.0;
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115 | double t25 = tk + 25.0;
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116 | double r25 = 10000.0;
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117 | double t = 1.0 / (log(VR1 * raw / (65536 - raw) / r25) / Bc + 1.0 / t25) - tk;
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118 | return t;
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119 | }
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