1 | #if ARDUINO >= 100
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2 | #include "Arduino.h"
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3 | #else
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4 | #include "WProgram.h"
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5 | #endif
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6 |
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7 | #ifdef __AVR_ATtiny85__
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8 | #include "TinyWireM.h"
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9 | #define Wire TinyWireM
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10 | #else
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11 | #include <Wire.h>
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12 | #endif
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13 |
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14 | #include "Adafruit_VCNL4000.h"
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15 |
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16 | /**************************************************************************/
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17 | /*!
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18 | @brief Instantiates a new VCNL4000 class
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19 | */
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20 | /**************************************************************************/
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21 | Adafruit_VCNL4000::Adafruit_VCNL4000() {
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22 | }
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23 |
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24 | /**************************************************************************/
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25 | /*!
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26 | @brief Setups the HW
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27 | */
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28 | /**************************************************************************/
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29 | boolean Adafruit_VCNL4000::begin(uint8_t addr) {
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30 | _i2caddr = addr;
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31 | Wire.begin();
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32 |
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33 | uint8_t rev = read8(VCNL4000_PRODUCTID);
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34 | //Serial.println(rev, HEX);
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35 | if ((rev & 0xF0) != 0x10) {
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36 | return false;
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37 | }
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38 |
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39 | setLEDcurrent(20);
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40 | setFrequency(VCNL4000_781K25);
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41 | write8(VCNL4000_PROXINITYADJUST, 0x81);
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42 |
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43 | return true;
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44 | }
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45 |
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46 |
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47 | /**************************************************************************/
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48 | /*!
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49 | @brief Get and set the LED current draw
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50 | */
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51 | /**************************************************************************/
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52 |
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53 | void Adafruit_VCNL4000::setLEDcurrent(uint8_t c) {
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54 | if (c > 20) c = 20;
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55 | write8(VCNL4000_IRLED, c);
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56 | }
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57 |
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58 | uint8_t Adafruit_VCNL4000::getLEDcurrent(void) {
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59 | return read8(VCNL4000_IRLED);
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60 | }
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61 |
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62 | /**************************************************************************/
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63 | /*!
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64 | @brief Get and set the measurement signal frequency
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65 | */
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66 | /**************************************************************************/
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67 |
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68 | void Adafruit_VCNL4000::setFrequency(vcnl4000_freq f) {
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69 | write8(VCNL4000_SIGNALFREQ, f);
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70 | }
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71 |
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72 |
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73 | /**************************************************************************/
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74 | /*!
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75 | @brief Get proximity measurement
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76 | */
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77 | /**************************************************************************/
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78 |
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79 | uint16_t Adafruit_VCNL4000::readProximity(void) {
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80 | write8(VCNL4000_COMMAND, VCNL4000_MEASUREPROXIMITY);
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81 | while (1) {
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82 | //Serial.println(read8(VCNL4000_INTSTAT), HEX);
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83 | uint8_t result = read8(VCNL4000_COMMAND);
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84 | //Serial.print("Ready = 0x"); Serial.println(result, HEX);
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85 | if (result & VCNL4000_PROXIMITYREADY) {
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86 | return read16(VCNL4000_PROXIMITYDATA);
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87 | }
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88 | delay(1);
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89 | }
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90 | }
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91 |
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92 | uint16_t Adafruit_VCNL4000::readAmbient(void) {
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93 | write8(VCNL4000_COMMAND, VCNL4000_MEASUREAMBIENT);
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94 | while (1) {
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95 | //Serial.println(read8(VCNL4000_INTSTAT), HEX);
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96 | uint8_t result = read8(VCNL4000_COMMAND);
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97 | //Serial.print("Ready = 0x"); Serial.println(result, HEX);
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98 | if (result & VCNL4000_AMBIENTREADY) {
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99 | return read16(VCNL4000_AMBIENTDATA);
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100 | }
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101 | delay(1);
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102 | }
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103 | }
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104 |
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105 | /**************************************************************************/
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106 | /*!
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107 | @brief I2C low level interfacing
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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 | // Read 1 byte from the VCNL4000 at 'address'
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113 | uint8_t Adafruit_VCNL4000::read8(uint8_t address)
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114 | {
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115 | uint8_t data;
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116 |
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117 | Wire.beginTransmission(_i2caddr);
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118 | #if ARDUINO >= 100
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119 | Wire.write(address);
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120 | #else
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121 | Wire.send(address);
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122 | #endif
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123 | Wire.endTransmission();
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124 |
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125 | delayMicroseconds(170); // delay required
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126 |
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127 | Wire.requestFrom(_i2caddr, (uint8_t)1);
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128 | while(!Wire.available());
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129 |
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130 | #if ARDUINO >= 100
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131 | return Wire.read();
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132 | #else
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133 | return Wire.receive();
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134 | #endif
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135 | }
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136 |
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137 |
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138 | // Read 2 byte from the VCNL4000 at 'address'
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139 | uint16_t Adafruit_VCNL4000::read16(uint8_t address)
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140 | {
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141 | uint16_t data;
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142 |
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143 | Wire.beginTransmission(_i2caddr);
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144 | #if ARDUINO >= 100
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145 | Wire.write(address);
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146 | #else
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147 | Wire.send(address);
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148 | #endif
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149 | Wire.endTransmission();
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150 |
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151 | Wire.requestFrom(_i2caddr, (uint8_t)2);
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152 | while(!Wire.available());
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153 | #if ARDUINO >= 100
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154 | data = Wire.read();
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155 | data <<= 8;
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156 | while(!Wire.available());
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157 | data |= Wire.read();
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158 | #else
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159 | data = Wire.receive();
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160 | data <<= 8;
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161 | while(!Wire.available());
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162 | data |= Wire.receive();
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163 | #endif
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164 |
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165 | return data;
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166 | }
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167 |
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168 | // write 1 byte
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169 | void Adafruit_VCNL4000::write8(uint8_t address, uint8_t data)
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170 | {
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171 | Wire.beginTransmission(_i2caddr);
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172 | #if ARDUINO >= 100
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173 | Wire.write(address);
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174 | Wire.write(data);
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175 | #else
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176 | Wire.send(address);
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177 | Wire.send(data);
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178 | #endif
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179 | Wire.endTransmission();
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180 | }
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