Karl Maxwell / TCS3472_I2C

Class which provides functions to control a TAOS TCS3472 Color Light-to-Digital Converter with IR Filter via I2C.

Dependents:   Chipin_Main Test_Color LAB_10_control FINAL_PROJECT ... more

TCS3472_I2C.cpp@3:6a89ac4a1979, 2014-03-20 (annotated)

Committer:
karlmaxwell67
Date:
Thu Mar 20 16:56:56 2014 +0000
Revision:
3:6a89ac4a1979
Parent:
2:38d5187a4e7b
Child:
4:5d1f8d7d81ff
Added more functions to increase the functionality of the class.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
karlmaxwell67 1:70d7d9f1af01 1 #include "TCS3472_I2C.h"
karlmaxwell67 1:70d7d9f1af01 2
karlmaxwell67 3:6a89ac4a1979 3 TCS3472_I2C::TCS3472_I2C( PinName sda, PinName scl ) : i2c( sda, scl ){
karlmaxwell67 3:6a89ac4a1979 4 i2c.frequency(400000);
karlmaxwell67 3:6a89ac4a1979 5 enablePowerAndRGBC();
karlmaxwell67 1:70d7d9f1af01 6 }
karlmaxwell67 1:70d7d9f1af01 7
karlmaxwell67 1:70d7d9f1af01 8 int TCS3472_I2C::writeSingleRegister( char address, char data ){
karlmaxwell67 1:70d7d9f1af01 9 char tx[2] = { address | 160, data }; //0d160 = 0b10100000
karlmaxwell67 3:6a89ac4a1979 10 int ack = i2c.write( SLAVE_ADDRESS << 1, tx, 2 );
karlmaxwell67 3:6a89ac4a1979 11 return ack;
karlmaxwell67 3:6a89ac4a1979 12 }
karlmaxwell67 3:6a89ac4a1979 13
karlmaxwell67 3:6a89ac4a1979 14 int TCS3472_I2C::writeMultipleRegisters( char address, char* data, int quantity ){
karlmaxwell67 3:6a89ac4a1979 15 char tx[ quantity + 1 ];
karlmaxwell67 3:6a89ac4a1979 16 tx[0] = address | 160;
karlmaxwell67 3:6a89ac4a1979 17 for ( int i = 1; i <= quantity; i++ ){
karlmaxwell67 3:6a89ac4a1979 18 tx[ i ] = data[ i - 1 ];
karlmaxwell67 3:6a89ac4a1979 19 }
karlmaxwell67 3:6a89ac4a1979 20 int ack = i2c.write( SLAVE_ADDRESS << 1, tx, quantity + 1 );
karlmaxwell67 1:70d7d9f1af01 21 return ack;
karlmaxwell67 1:70d7d9f1af01 22 }
karlmaxwell67 1:70d7d9f1af01 23
karlmaxwell67 1:70d7d9f1af01 24 char TCS3472_I2C::readSingleRegister( char address ){
karlmaxwell67 1:70d7d9f1af01 25 char output = 255;
karlmaxwell67 1:70d7d9f1af01 26 char command = address | 160; //0d160 = 0b10100000
karlmaxwell67 3:6a89ac4a1979 27 i2c.write( SLAVE_ADDRESS << 1, &command, 1, true );
karlmaxwell67 3:6a89ac4a1979 28 i2c.read( SLAVE_ADDRESS << 1, &output, 1 );
karlmaxwell67 1:70d7d9f1af01 29 return output;
karlmaxwell67 1:70d7d9f1af01 30 }
karlmaxwell67 1:70d7d9f1af01 31
karlmaxwell67 1:70d7d9f1af01 32 int TCS3472_I2C::readMultipleRegisters( char address, char* output, int quantity ){
karlmaxwell67 1:70d7d9f1af01 33 char command = address | 160; //0d160 = 0b10100000
karlmaxwell67 3:6a89ac4a1979 34 i2c.write( SLAVE_ADDRESS << 1, &command, 1, true );
karlmaxwell67 3:6a89ac4a1979 35 int ack = i2c.read( SLAVE_ADDRESS << 1, output, quantity );
karlmaxwell67 1:70d7d9f1af01 36 return ack;
karlmaxwell67 1:70d7d9f1af01 37 }
karlmaxwell67 1:70d7d9f1af01 38
karlmaxwell67 1:70d7d9f1af01 39 int TCS3472_I2C::getAllColours( int* readings ){
karlmaxwell67 1:70d7d9f1af01 40 char buffer[8] = { 0 };
karlmaxwell67 1:70d7d9f1af01 41
karlmaxwell67 1:70d7d9f1af01 42 readMultipleRegisters( CDATA, buffer, 8 );
karlmaxwell67 1:70d7d9f1af01 43
karlmaxwell67 1:70d7d9f1af01 44 readings[0] = (int)buffer[1] << 8 | (int)buffer[0];
karlmaxwell67 1:70d7d9f1af01 45 readings[1] = (int)buffer[3] << 8 | (int)buffer[2];
karlmaxwell67 1:70d7d9f1af01 46 readings[2] = (int)buffer[5] << 8 | (int)buffer[4];
karlmaxwell67 1:70d7d9f1af01 47 readings[3] = (int)buffer[7] << 8 | (int)buffer[6];
karlmaxwell67 0:453a43c8bf2b 48
karlmaxwell67 1:70d7d9f1af01 49 return 0;
karlmaxwell67 1:70d7d9f1af01 50 }
karlmaxwell67 1:70d7d9f1af01 51
karlmaxwell67 1:70d7d9f1af01 52 int TCS3472_I2C::getClearData(){
karlmaxwell67 1:70d7d9f1af01 53 char buffer[2] = { 0 };
karlmaxwell67 1:70d7d9f1af01 54 readMultipleRegisters( CDATA, buffer, 2 );
karlmaxwell67 1:70d7d9f1af01 55 int reading = (int)buffer[1] << 8 | (int)buffer[0];
karlmaxwell67 1:70d7d9f1af01 56 return reading;
karlmaxwell67 1:70d7d9f1af01 57 }
karlmaxwell67 1:70d7d9f1af01 58
karlmaxwell67 1:70d7d9f1af01 59 int TCS3472_I2C::getRedData(){
karlmaxwell67 1:70d7d9f1af01 60 char buffer[2] = { 0 };
karlmaxwell67 1:70d7d9f1af01 61 readMultipleRegisters( RDATA, buffer, 2 );
karlmaxwell67 1:70d7d9f1af01 62 int reading = (int)buffer[1] << 8 | (int)buffer[0];
karlmaxwell67 1:70d7d9f1af01 63 return reading;
karlmaxwell67 1:70d7d9f1af01 64 }
karlmaxwell67 1:70d7d9f1af01 65
karlmaxwell67 1:70d7d9f1af01 66 int TCS3472_I2C::getGreenData(){
karlmaxwell67 1:70d7d9f1af01 67 char buffer[2] = { 0 };
karlmaxwell67 1:70d7d9f1af01 68 readMultipleRegisters( GDATA, buffer, 2 );
karlmaxwell67 1:70d7d9f1af01 69 int reading = (int)buffer[1] << 8 | (int)buffer[0];
karlmaxwell67 1:70d7d9f1af01 70 return reading;
karlmaxwell67 1:70d7d9f1af01 71 }
karlmaxwell67 1:70d7d9f1af01 72
karlmaxwell67 1:70d7d9f1af01 73 int TCS3472_I2C::getBlueData(){
karlmaxwell67 1:70d7d9f1af01 74 char buffer[2] = { 0 };
karlmaxwell67 1:70d7d9f1af01 75 readMultipleRegisters( BDATA, buffer, 2 );
karlmaxwell67 1:70d7d9f1af01 76 int reading = (int)buffer[1] << 8 | (int)buffer[0];
karlmaxwell67 1:70d7d9f1af01 77 return reading;
karlmaxwell67 2:38d5187a4e7b 78 }
karlmaxwell67 2:38d5187a4e7b 79
karlmaxwell67 3:6a89ac4a1979 80 int TCS3472_I2C::enablePower(){
karlmaxwell67 3:6a89ac4a1979 81 char enable_old = readSingleRegister( ENABLE );
karlmaxwell67 3:6a89ac4a1979 82 char enable_new = enable_old | 1; // sets PON (bit 0) to 1
karlmaxwell67 3:6a89ac4a1979 83 int ack = writeSingleRegister( ENABLE, enable_new );
karlmaxwell67 3:6a89ac4a1979 84 return ack;
karlmaxwell67 3:6a89ac4a1979 85 }
karlmaxwell67 3:6a89ac4a1979 86
karlmaxwell67 3:6a89ac4a1979 87 int TCS3472_I2C::disablePower(){
karlmaxwell67 3:6a89ac4a1979 88 char enable_old = readSingleRegister( ENABLE );
karlmaxwell67 3:6a89ac4a1979 89 char enable_new = enable_old & 254; // sets PON (bit 0) to 0
karlmaxwell67 3:6a89ac4a1979 90 int ack = writeSingleRegister( ENABLE, enable_new );
karlmaxwell67 3:6a89ac4a1979 91 return ack;
karlmaxwell67 3:6a89ac4a1979 92 }
karlmaxwell67 3:6a89ac4a1979 93
karlmaxwell67 3:6a89ac4a1979 94 int TCS3472_I2C::enableRGBC(){
karlmaxwell67 3:6a89ac4a1979 95 char enable_old = readSingleRegister( ENABLE );
karlmaxwell67 3:6a89ac4a1979 96 char enable_new = enable_old | 2; // sets AEN (bit 1) to 1
karlmaxwell67 3:6a89ac4a1979 97 int ack = writeSingleRegister( ENABLE, enable_new );
karlmaxwell67 3:6a89ac4a1979 98 return ack;
karlmaxwell67 3:6a89ac4a1979 99 }
karlmaxwell67 3:6a89ac4a1979 100
karlmaxwell67 3:6a89ac4a1979 101 int TCS3472_I2C::disableRGBC(){
karlmaxwell67 3:6a89ac4a1979 102 char enable_old = readSingleRegister( ENABLE );
karlmaxwell67 3:6a89ac4a1979 103 char enable_new = enable_old & 253; // sets AEN (bit 1) to 0
karlmaxwell67 3:6a89ac4a1979 104 int ack = writeSingleRegister( ENABLE, enable_new );
karlmaxwell67 3:6a89ac4a1979 105 return ack;
karlmaxwell67 3:6a89ac4a1979 106 }
karlmaxwell67 3:6a89ac4a1979 107
karlmaxwell67 3:6a89ac4a1979 108 int TCS3472_I2C::enablePowerAndRGBC(){
karlmaxwell67 3:6a89ac4a1979 109 char enable_old = readSingleRegister( ENABLE );
karlmaxwell67 3:6a89ac4a1979 110 char enable_new = enable_old | 3; // sets PON (bit 0) and AEN (bit 1) to 1
karlmaxwell67 3:6a89ac4a1979 111 int ack = writeSingleRegister( ENABLE, enable_new );
karlmaxwell67 3:6a89ac4a1979 112 return ack;
karlmaxwell67 3:6a89ac4a1979 113 }
karlmaxwell67 3:6a89ac4a1979 114
karlmaxwell67 3:6a89ac4a1979 115 int TCS3472_I2C::disablePowerAndRGBC(){
karlmaxwell67 3:6a89ac4a1979 116 char enable_old = readSingleRegister( ENABLE );
karlmaxwell67 3:6a89ac4a1979 117 char enable_new = enable_old | 252; // sets PON (bit 0) and AEN (bit 1) to 0
karlmaxwell67 3:6a89ac4a1979 118 int ack = writeSingleRegister( ENABLE, enable_new );
karlmaxwell67 2:38d5187a4e7b 119 return ack;
karlmaxwell67 2:38d5187a4e7b 120 }
karlmaxwell67 2:38d5187a4e7b 121
karlmaxwell67 2:38d5187a4e7b 122 int TCS3472_I2C::enableWait(){
karlmaxwell67 3:6a89ac4a1979 123 char enable_old = readSingleRegister( ENABLE );
karlmaxwell67 2:38d5187a4e7b 124 char enable_new = enable_old | 8; // sets WEN (bit 4) to 1
karlmaxwell67 3:6a89ac4a1979 125 int ack = writeSingleRegister( ENABLE, enable_new );
karlmaxwell67 2:38d5187a4e7b 126 return ack;
karlmaxwell67 2:38d5187a4e7b 127 }
karlmaxwell67 2:38d5187a4e7b 128
karlmaxwell67 2:38d5187a4e7b 129 int TCS3472_I2C::disableWait(){
karlmaxwell67 3:6a89ac4a1979 130 char enable_old = readSingleRegister( ENABLE );
karlmaxwell67 2:38d5187a4e7b 131 char enable_new = enable_old & 247; // sets WEN (bit 4) to 0
karlmaxwell67 3:6a89ac4a1979 132 int ack = writeSingleRegister( ENABLE, enable_new );
karlmaxwell67 2:38d5187a4e7b 133 return ack;
karlmaxwell67 2:38d5187a4e7b 134 }
karlmaxwell67 2:38d5187a4e7b 135
karlmaxwell67 2:38d5187a4e7b 136 int TCS3472_I2C::enableInterrupt(){
karlmaxwell67 3:6a89ac4a1979 137 char enable_old = readSingleRegister( ENABLE );
karlmaxwell67 2:38d5187a4e7b 138 char enable_new = enable_old | 16; // sets AIEN (bit 5) to 1
karlmaxwell67 3:6a89ac4a1979 139 int ack = writeSingleRegister( ENABLE, enable_new );
karlmaxwell67 2:38d5187a4e7b 140 return ack;
karlmaxwell67 2:38d5187a4e7b 141 }
karlmaxwell67 2:38d5187a4e7b 142
karlmaxwell67 2:38d5187a4e7b 143 int TCS3472_I2C::disableInterrupt(){
karlmaxwell67 3:6a89ac4a1979 144 char enable_old = readSingleRegister( ENABLE );
karlmaxwell67 2:38d5187a4e7b 145 char enable_new = enable_old & 239; // sets AIEN (bit 5) to 0
karlmaxwell67 3:6a89ac4a1979 146 int ack = writeSingleRegister( ENABLE, enable_new );
karlmaxwell67 3:6a89ac4a1979 147 return ack;
karlmaxwell67 3:6a89ac4a1979 148 }
karlmaxwell67 3:6a89ac4a1979 149
karlmaxwell67 3:6a89ac4a1979 150 int TCS3472_I2C::setIntegrationTime( const float itime ){
karlmaxwell67 3:6a89ac4a1979 151 char atime = 256 - itime / 2.4;
karlmaxwell67 3:6a89ac4a1979 152 int ack = writeSingleRegister( ATIME, atime );
karlmaxwell67 2:38d5187a4e7b 153 return ack;
karlmaxwell67 2:38d5187a4e7b 154 }
karlmaxwell67 2:38d5187a4e7b 155
karlmaxwell67 2:38d5187a4e7b 156 int TCS3472_I2C::setWaitTime( const float time ){
karlmaxwell67 2:38d5187a4e7b 157 int ack = 1;
karlmaxwell67 2:38d5187a4e7b 158 char wtime = 0;
karlmaxwell67 2:38d5187a4e7b 159 if ( time >= 2.4 && time <= 614.4 ){
karlmaxwell67 3:6a89ac4a1979 160 ack = writeSingleRegister( CONFIG, 0 ); // sets WLONG to 0
karlmaxwell67 2:38d5187a4e7b 161 wtime = 256 - time / 2.4;
karlmaxwell67 2:38d5187a4e7b 162 }
karlmaxwell67 2:38d5187a4e7b 163 else if ( time > 614.4 && time <= 7400 ){
karlmaxwell67 3:6a89ac4a1979 164 ack = writeSingleRegister( CONFIG, 2 ); // sets WLONG to 1
karlmaxwell67 2:38d5187a4e7b 165 wtime = 256 - ( time / 12 ) / 2.4;
karlmaxwell67 2:38d5187a4e7b 166 }
karlmaxwell67 2:38d5187a4e7b 167 ack = ack || writeSingleRegister( WTIME, wtime );
karlmaxwell67 2:38d5187a4e7b 168 return ack;
karlmaxwell67 3:6a89ac4a1979 169 }
karlmaxwell67 3:6a89ac4a1979 170
karlmaxwell67 3:6a89ac4a1979 171 char TCS3472_I2C::readEnableRegister(){
karlmaxwell67 3:6a89ac4a1979 172 return readSingleRegister( ENABLE );
karlmaxwell67 3:6a89ac4a1979 173 }
karlmaxwell67 3:6a89ac4a1979 174
karlmaxwell67 3:6a89ac4a1979 175 int TCS3472_I2C::readLowInterruptThreshold(){
karlmaxwell67 3:6a89ac4a1979 176 char buffer[2] = { 0 };
karlmaxwell67 3:6a89ac4a1979 177 readMultipleRegisters( AILTL, buffer, 2 );
karlmaxwell67 3:6a89ac4a1979 178 int reading = (int)buffer[1] << 8 | (int)buffer[0];
karlmaxwell67 3:6a89ac4a1979 179 return reading;
karlmaxwell67 3:6a89ac4a1979 180 }
karlmaxwell67 3:6a89ac4a1979 181
karlmaxwell67 3:6a89ac4a1979 182 int TCS3472_I2C::readHighInterruptThreshold(){
karlmaxwell67 3:6a89ac4a1979 183 char buffer[2] = { 0 };
karlmaxwell67 3:6a89ac4a1979 184 readMultipleRegisters( AIHTL, buffer, 2 );
karlmaxwell67 3:6a89ac4a1979 185 int reading = (int)buffer[1] << 8 | (int)buffer[0];
karlmaxwell67 3:6a89ac4a1979 186 return reading;
karlmaxwell67 3:6a89ac4a1979 187 }
karlmaxwell67 3:6a89ac4a1979 188
karlmaxwell67 3:6a89ac4a1979 189 int TCS3472_I2C::setLowInterruptThreshold( const int threshold ){
karlmaxwell67 3:6a89ac4a1979 190 char threshold_bytes[2];
karlmaxwell67 3:6a89ac4a1979 191 threshold_bytes[0] = threshold; // take lowest 8 bits of threshold
karlmaxwell67 3:6a89ac4a1979 192 threshold_bytes[1] = threshold >> 8; // take highest 8 bits of threshold
karlmaxwell67 3:6a89ac4a1979 193 int ack = writeMultipleRegisters( AILTL, threshold_bytes, 2 );
karlmaxwell67 3:6a89ac4a1979 194 return ack;
karlmaxwell67 3:6a89ac4a1979 195 }
karlmaxwell67 3:6a89ac4a1979 196
karlmaxwell67 3:6a89ac4a1979 197 int TCS3472_I2C::setHighInterruptThreshold( const int threshold ){
karlmaxwell67 3:6a89ac4a1979 198 char threshold_bytes[2];
karlmaxwell67 3:6a89ac4a1979 199 threshold_bytes[0] = threshold;
karlmaxwell67 3:6a89ac4a1979 200 threshold_bytes[1] = threshold >> 8;
karlmaxwell67 3:6a89ac4a1979 201 int ack = writeMultipleRegisters( AIHTL, threshold_bytes, 2 );
karlmaxwell67 3:6a89ac4a1979 202 return ack;
karlmaxwell67 3:6a89ac4a1979 203 }
karlmaxwell67 3:6a89ac4a1979 204
karlmaxwell67 3:6a89ac4a1979 205 int TCS3472_I2C::readInterruptPersistence(){
karlmaxwell67 3:6a89ac4a1979 206 char pers = readSingleRegister( PERS );
karlmaxwell67 3:6a89ac4a1979 207 char persistence_bits = ( pers << 4 ) >> 4; // discard bits 4 to 7, keep only bits 0 to 3
karlmaxwell67 3:6a89ac4a1979 208 int persistence = -1;
karlmaxwell67 3:6a89ac4a1979 209 switch (persistence_bits){
karlmaxwell67 3:6a89ac4a1979 210 case 0:
karlmaxwell67 3:6a89ac4a1979 211 persistence = 0;
karlmaxwell67 3:6a89ac4a1979 212 break;
karlmaxwell67 3:6a89ac4a1979 213 case 1:
karlmaxwell67 3:6a89ac4a1979 214 persistence = 1;
karlmaxwell67 3:6a89ac4a1979 215 break;
karlmaxwell67 3:6a89ac4a1979 216 case 2:
karlmaxwell67 3:6a89ac4a1979 217 persistence = 2;
karlmaxwell67 3:6a89ac4a1979 218 break;
karlmaxwell67 3:6a89ac4a1979 219 case 3:
karlmaxwell67 3:6a89ac4a1979 220 persistence = 3;
karlmaxwell67 3:6a89ac4a1979 221 break;
karlmaxwell67 3:6a89ac4a1979 222 case 4:
karlmaxwell67 3:6a89ac4a1979 223 persistence = 5;
karlmaxwell67 3:6a89ac4a1979 224 break;
karlmaxwell67 3:6a89ac4a1979 225 case 5:
karlmaxwell67 3:6a89ac4a1979 226 persistence = 10;
karlmaxwell67 3:6a89ac4a1979 227 break;
karlmaxwell67 3:6a89ac4a1979 228 case 6:
karlmaxwell67 3:6a89ac4a1979 229 persistence = 15;
karlmaxwell67 3:6a89ac4a1979 230 break;
karlmaxwell67 3:6a89ac4a1979 231 case 7:
karlmaxwell67 3:6a89ac4a1979 232 persistence = 20;
karlmaxwell67 3:6a89ac4a1979 233 break;
karlmaxwell67 3:6a89ac4a1979 234 case 8:
karlmaxwell67 3:6a89ac4a1979 235 persistence = 25;
karlmaxwell67 3:6a89ac4a1979 236 break;
karlmaxwell67 3:6a89ac4a1979 237 case 9:
karlmaxwell67 3:6a89ac4a1979 238 persistence = 30;
karlmaxwell67 3:6a89ac4a1979 239 break;
karlmaxwell67 3:6a89ac4a1979 240 case 10:
karlmaxwell67 3:6a89ac4a1979 241 persistence = 35;
karlmaxwell67 3:6a89ac4a1979 242 break;
karlmaxwell67 3:6a89ac4a1979 243 case 11:
karlmaxwell67 3:6a89ac4a1979 244 persistence = 40;
karlmaxwell67 3:6a89ac4a1979 245 break;
karlmaxwell67 3:6a89ac4a1979 246 case 12:
karlmaxwell67 3:6a89ac4a1979 247 persistence = 45;
karlmaxwell67 3:6a89ac4a1979 248 break;
karlmaxwell67 3:6a89ac4a1979 249 case 13:
karlmaxwell67 3:6a89ac4a1979 250 persistence = 50;
karlmaxwell67 3:6a89ac4a1979 251 break;
karlmaxwell67 3:6a89ac4a1979 252 case 14:
karlmaxwell67 3:6a89ac4a1979 253 persistence = 55;
karlmaxwell67 3:6a89ac4a1979 254 break;
karlmaxwell67 3:6a89ac4a1979 255 case 15:
karlmaxwell67 3:6a89ac4a1979 256 persistence = 60;
karlmaxwell67 3:6a89ac4a1979 257 break;
karlmaxwell67 3:6a89ac4a1979 258 default:
karlmaxwell67 3:6a89ac4a1979 259 break;
karlmaxwell67 3:6a89ac4a1979 260 }
karlmaxwell67 3:6a89ac4a1979 261 return persistence;
karlmaxwell67 3:6a89ac4a1979 262 }
karlmaxwell67 3:6a89ac4a1979 263
karlmaxwell67 3:6a89ac4a1979 264 int TCS3472_I2C::setInterruptPersistence( const int persistence ){
karlmaxwell67 3:6a89ac4a1979 265 char pers_byte;
karlmaxwell67 3:6a89ac4a1979 266 int ack = 0;
karlmaxwell67 3:6a89ac4a1979 267 switch (persistence){
karlmaxwell67 3:6a89ac4a1979 268 case 0:
karlmaxwell67 3:6a89ac4a1979 269 pers_byte = 0;
karlmaxwell67 3:6a89ac4a1979 270 break;
karlmaxwell67 3:6a89ac4a1979 271 case 1:
karlmaxwell67 3:6a89ac4a1979 272 pers_byte = 1;
karlmaxwell67 3:6a89ac4a1979 273 break;
karlmaxwell67 3:6a89ac4a1979 274 case 2:
karlmaxwell67 3:6a89ac4a1979 275 pers_byte = 2;
karlmaxwell67 3:6a89ac4a1979 276 break;
karlmaxwell67 3:6a89ac4a1979 277 case 3:
karlmaxwell67 3:6a89ac4a1979 278 pers_byte = 3;
karlmaxwell67 3:6a89ac4a1979 279 break;
karlmaxwell67 3:6a89ac4a1979 280 case 5:
karlmaxwell67 3:6a89ac4a1979 281 pers_byte = 4;
karlmaxwell67 3:6a89ac4a1979 282 break;
karlmaxwell67 3:6a89ac4a1979 283 case 10:
karlmaxwell67 3:6a89ac4a1979 284 pers_byte = 5;
karlmaxwell67 3:6a89ac4a1979 285 break;
karlmaxwell67 3:6a89ac4a1979 286 case 15:
karlmaxwell67 3:6a89ac4a1979 287 pers_byte = 6;
karlmaxwell67 3:6a89ac4a1979 288 break;
karlmaxwell67 3:6a89ac4a1979 289 case 20:
karlmaxwell67 3:6a89ac4a1979 290 pers_byte = 7;
karlmaxwell67 3:6a89ac4a1979 291 break;
karlmaxwell67 3:6a89ac4a1979 292 case 25:
karlmaxwell67 3:6a89ac4a1979 293 pers_byte = 8;
karlmaxwell67 3:6a89ac4a1979 294 break;
karlmaxwell67 3:6a89ac4a1979 295 case 30:
karlmaxwell67 3:6a89ac4a1979 296 pers_byte = 9;
karlmaxwell67 3:6a89ac4a1979 297 break;
karlmaxwell67 3:6a89ac4a1979 298 case 35:
karlmaxwell67 3:6a89ac4a1979 299 pers_byte = 10;
karlmaxwell67 3:6a89ac4a1979 300 break;
karlmaxwell67 3:6a89ac4a1979 301 case 40:
karlmaxwell67 3:6a89ac4a1979 302 pers_byte = 11;
karlmaxwell67 3:6a89ac4a1979 303 break;
karlmaxwell67 3:6a89ac4a1979 304 case 45:
karlmaxwell67 3:6a89ac4a1979 305 pers_byte = 12;
karlmaxwell67 3:6a89ac4a1979 306 break;
karlmaxwell67 3:6a89ac4a1979 307 case 50:
karlmaxwell67 3:6a89ac4a1979 308 pers_byte = 13;
karlmaxwell67 3:6a89ac4a1979 309 break;
karlmaxwell67 3:6a89ac4a1979 310 case 55:
karlmaxwell67 3:6a89ac4a1979 311 pers_byte = 14;
karlmaxwell67 3:6a89ac4a1979 312 break;
karlmaxwell67 3:6a89ac4a1979 313 case 60:
karlmaxwell67 3:6a89ac4a1979 314 pers_byte = 15;
karlmaxwell67 3:6a89ac4a1979 315 break;
karlmaxwell67 3:6a89ac4a1979 316 default:
karlmaxwell67 3:6a89ac4a1979 317 ack = 2; // 2 used to indicate invalid entry
karlmaxwell67 3:6a89ac4a1979 318 break;
karlmaxwell67 3:6a89ac4a1979 319 }
karlmaxwell67 3:6a89ac4a1979 320 if ( ack != 2 ){
karlmaxwell67 3:6a89ac4a1979 321 ack = writeSingleRegister( PERS, pers_byte );
karlmaxwell67 3:6a89ac4a1979 322 }
karlmaxwell67 3:6a89ac4a1979 323 return ack;
karlmaxwell67 3:6a89ac4a1979 324 }
karlmaxwell67 3:6a89ac4a1979 325
karlmaxwell67 3:6a89ac4a1979 326 int TCS3472_I2C::clearInterrupt(){
karlmaxwell67 3:6a89ac4a1979 327 char tx = 230;
karlmaxwell67 3:6a89ac4a1979 328 int ack = i2c.write( SLAVE_ADDRESS << 1, &tx, 1 );
karlmaxwell67 3:6a89ac4a1979 329 return ack;
karlmaxwell67 3:6a89ac4a1979 330 }
karlmaxwell67 3:6a89ac4a1979 331
karlmaxwell67 3:6a89ac4a1979 332 int TCS3472_I2C::readRGBCGain(){
karlmaxwell67 3:6a89ac4a1979 333 char control = readSingleRegister( CONTROL );
karlmaxwell67 3:6a89ac4a1979 334 char gain_bits = ( control << 6 ) >> 6; // discard bits 2 to 7, keep only bits 0 & 1
karlmaxwell67 3:6a89ac4a1979 335 int gain;
karlmaxwell67 3:6a89ac4a1979 336 switch (gain_bits) {
karlmaxwell67 3:6a89ac4a1979 337 case 0:
karlmaxwell67 3:6a89ac4a1979 338 gain = 1;
karlmaxwell67 3:6a89ac4a1979 339 break;
karlmaxwell67 3:6a89ac4a1979 340 case 1:
karlmaxwell67 3:6a89ac4a1979 341 gain = 4;
karlmaxwell67 3:6a89ac4a1979 342 break;
karlmaxwell67 3:6a89ac4a1979 343 case 2:
karlmaxwell67 3:6a89ac4a1979 344 gain = 16;
karlmaxwell67 3:6a89ac4a1979 345 break;
karlmaxwell67 3:6a89ac4a1979 346 case 3:
karlmaxwell67 3:6a89ac4a1979 347 gain = 60;
karlmaxwell67 3:6a89ac4a1979 348 break;
karlmaxwell67 3:6a89ac4a1979 349 default:
karlmaxwell67 3:6a89ac4a1979 350 gain = 0;
karlmaxwell67 3:6a89ac4a1979 351 break;
karlmaxwell67 3:6a89ac4a1979 352 }
karlmaxwell67 3:6a89ac4a1979 353 return gain;
karlmaxwell67 3:6a89ac4a1979 354 }
karlmaxwell67 3:6a89ac4a1979 355
karlmaxwell67 3:6a89ac4a1979 356 int TCS3472_I2C::setRGBCGain( const int gain ){
karlmaxwell67 3:6a89ac4a1979 357 char control;
karlmaxwell67 3:6a89ac4a1979 358 int ack = 0;
karlmaxwell67 3:6a89ac4a1979 359 switch (gain){
karlmaxwell67 3:6a89ac4a1979 360 case 1:
karlmaxwell67 3:6a89ac4a1979 361 control = 0;
karlmaxwell67 3:6a89ac4a1979 362 break;
karlmaxwell67 3:6a89ac4a1979 363 case 4:
karlmaxwell67 3:6a89ac4a1979 364 control = 1;
karlmaxwell67 3:6a89ac4a1979 365 break;
karlmaxwell67 3:6a89ac4a1979 366 case 16:
karlmaxwell67 3:6a89ac4a1979 367 control = 2;
karlmaxwell67 3:6a89ac4a1979 368 break;
karlmaxwell67 3:6a89ac4a1979 369 case 60:
karlmaxwell67 3:6a89ac4a1979 370 control = 3;
karlmaxwell67 3:6a89ac4a1979 371 break;
karlmaxwell67 3:6a89ac4a1979 372 default:
karlmaxwell67 3:6a89ac4a1979 373 ack = 2; // 2 used to indicate invalid entry
karlmaxwell67 3:6a89ac4a1979 374 break;
karlmaxwell67 3:6a89ac4a1979 375 }
karlmaxwell67 3:6a89ac4a1979 376 if ( ack != 2 ){
karlmaxwell67 3:6a89ac4a1979 377 ack = writeSingleRegister( CONTROL, control );
karlmaxwell67 3:6a89ac4a1979 378 }
karlmaxwell67 3:6a89ac4a1979 379 return ack;
karlmaxwell67 3:6a89ac4a1979 380 }
karlmaxwell67 3:6a89ac4a1979 381
karlmaxwell67 3:6a89ac4a1979 382 char TCS3472_I2C::getDeviceID(){
karlmaxwell67 3:6a89ac4a1979 383 return readSingleRegister( ID );
karlmaxwell67 3:6a89ac4a1979 384 }
karlmaxwell67 3:6a89ac4a1979 385
karlmaxwell67 3:6a89ac4a1979 386 char TCS3472_I2C::readStatusRegister(){
karlmaxwell67 3:6a89ac4a1979 387 return readSingleRegister( STATUS );
karlmaxwell67 0:453a43c8bf2b 388 }