1 | /***************************************************
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2 | This is a library for the TMP007 Temp Sensor
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3 |
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4 | Designed specifically to work with the Adafruit TMP007 Breakout
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5 | ----> https://www.adafruit.com/products/2023
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6 |
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7 | These displays use I2C to communicate, 2 pins are required to
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8 | interface
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9 | Adafruit invests time and resources providing this open source code,
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10 | please support Adafruit and open-source hardware by purchasing
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11 | products from Adafruit!
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12 |
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13 | Written by Limor Fried/Ladyada for Adafruit Industries.
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14 | BSD license, all text above must be included in any redistribution
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15 | ****************************************************/
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16 |
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17 | #include "Adafruit_TMP007.h"
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18 | //#include <util/delay.h>
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19 |
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20 | //#define TESTDIE 0x0C78
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21 | //#define TESTVOLT 0xFEED
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22 |
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23 | Adafruit_TMP007::Adafruit_TMP007(uint8_t i2caddr) {
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24 | _addr = i2caddr;
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25 | }
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26 |
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27 |
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28 | boolean Adafruit_TMP007::begin(uint16_t samplerate) {
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29 | Wire.begin();
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30 | write16(TMP007_CONFIG, TMP007_CFG_MODEON | TMP007_CFG_ALERTEN |
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31 | TMP007_CFG_TRANSC | samplerate);
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32 | write16(TMP007_STATMASK, TMP007_STAT_ALERTEN |TMP007_STAT_CRTEN);
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33 | // enable conversion ready alert
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34 | uint16_t did;
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35 | did = read16(TMP007_DEVID);
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36 | #ifdef TMP007_DEBUG
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37 | Serial.print("did = 0x"); Serial.println(did, HEX);
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38 | #endif
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39 | if (did != 0x78) return false;
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40 | return true;
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41 | }
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42 |
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43 | //////////////////////////////////////////////////////
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44 |
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45 | double Adafruit_TMP007::readDieTempC(void) {
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46 | double Tdie = readRawDieTemperature();
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47 | Tdie *= 0.03125; // convert to celsius
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48 | #ifdef TMP007_DEBUG
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49 | Serial.print("Tdie = "); Serial.print(Tdie); Serial.println(" C");
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50 | #endif
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51 | return Tdie;
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52 | }
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53 |
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54 | double Adafruit_TMP007::readObjTempC(void) {
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55 | int16_t raw = read16(TMP007_TOBJ);
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56 | // invalid
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57 | if (raw & 0x1) return NAN;
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58 | raw >>=2;
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59 |
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60 | double Tobj = raw;
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61 | Tobj *= 0.03125; // convert to celsius
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62 | #ifdef TMP007_DEBUG
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63 | Serial.print("Tobj = "); Serial.print(Tobj); Serial.println(" C");
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64 | #endif
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65 | return Tobj;
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66 | }
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67 |
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68 |
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69 |
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70 | int16_t Adafruit_TMP007::readRawDieTemperature(void) {
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71 | int16_t raw = read16(TMP007_TDIE);
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72 |
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73 | #if TMP007_DEBUG == 1
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74 |
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75 | #ifdef TESTDIE
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76 | raw = TESTDIE;
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77 | #endif
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78 |
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79 | Serial.print("Raw Tambient: 0x"); Serial.print (raw, HEX);
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80 |
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81 |
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82 | float v = raw/4;
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83 | v *= 0.03125;
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84 | Serial.print(" ("); Serial.print(v); Serial.println(" *C)");
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85 | #endif
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86 | raw >>= 2;
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87 | return raw;
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88 | }
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89 |
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90 | int16_t Adafruit_TMP007::readRawVoltage(void) {
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91 | int16_t raw;
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92 |
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93 | raw = read16(TMP007_VOBJ);
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94 |
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95 | #if TMP007_DEBUG == 1
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96 |
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97 | #ifdef TESTVOLT
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98 | raw = TESTVOLT;
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99 | #endif
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100 |
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101 | Serial.print("Raw voltage: 0x"); Serial.print (raw, HEX);
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102 | float v = raw;
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103 | v *= 156.25;
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104 | v /= 1000;
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105 | Serial.print(" ("); Serial.print(v); Serial.println(" uV)");
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106 | #endif
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107 | return raw;
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108 | }
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109 |
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110 |
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111 | /*********************************************************************/
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112 |
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113 | uint16_t Adafruit_TMP007::read16(uint8_t a) {
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114 | uint16_t ret;
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115 |
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116 | Wire.beginTransmission(_addr); // start transmission to device
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117 | #if (ARDUINO >= 100)
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118 | Wire.write(a); // sends register address to read from
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119 | #else
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120 | Wire.send(a); // sends register address to read from
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121 | #endif
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122 | Wire.endTransmission(); // end transmission
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123 |
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124 | Wire.beginTransmission(_addr); // start transmission to device
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125 | Wire.requestFrom(_addr, (uint8_t)2);// send data n-bytes read
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126 | #if (ARDUINO >= 100)
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127 | ret = Wire.read(); // receive DATA
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128 | ret <<= 8;
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129 | ret |= Wire.read(); // receive DATA
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130 | #else
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131 | ret = Wire.receive(); // receive DATA
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132 | ret <<= 8;
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133 | ret |= Wire.receive(); // receive DATA
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134 | #endif
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135 | Wire.endTransmission(); // end transmission
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136 |
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137 | return ret;
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138 | }
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139 |
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140 | void Adafruit_TMP007::write16(uint8_t a, uint16_t d) {
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141 | Wire.beginTransmission(_addr); // start transmission to device
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142 | #if (ARDUINO >= 100)
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143 | Wire.write(a); // sends register address to read from
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144 | Wire.write(d>>8); // write data
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145 | Wire.write(d); // write data
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146 | #else
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147 | Wire.send(a); // sends register address to read from
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148 | Wire.send(d>>8); // write data
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149 | Wire.send(d); // write data
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150 | #endif
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151 | Wire.endTransmission(); // end transmission
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152 | }
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153 |
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