[137] | 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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