Maaz Shaikh / VL6180

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Dependents:   tof100

VL6180.cpp@4:aab6582c7456, 2020-04-03 (annotated)

Committer:
maazshaikh
Date:
Fri Apr 03 15:38:03 2020 +0000
Revision:
4:aab6582c7456
Parent:
3:5d61f202b1bd 
sds

Who changed what in which revision?

UserRevisionLine numberNew contents of line
maazshaikh 4:aab6582c7456 1 /******************************************************************************
maazshaikh 4:aab6582c7456 2 * SFE_VL6180.cpp
maazshaikh 4:aab6582c7456 3 * Library for VL6180 time of flight range finder.
maazshaikh 4:aab6582c7456 4 * Casey Kuhns @ SparkFun Electronics
maazshaikh 4:aab6582c7456 5 * 10/29/2014
maazshaikh 4:aab6582c7456 6 * https://github.com/sparkfun/
maazshaikh 4:aab6582c7456 7 *
maazshaikh 4:aab6582c7456 8 * The VL6180 by ST micro is a time of flight range finder that
maazshaikh 4:aab6582c7456 9 * uses pulsed IR light to determine distances from object at close
maazshaikh 4:aab6582c7456 10 * range. The average range of a sensor is between 0-200mm
maazshaikh 4:aab6582c7456 11 *
maazshaikh 4:aab6582c7456 12 * In this file are the functions in the VL6180 class
maazshaikh 4:aab6582c7456 13 *
maazshaikh 4:aab6582c7456 14 * Resources:
maazshaikh 4:aab6582c7456 15 * This library uses the Arduino Wire.h to complete I2C transactions.
maazshaikh 4:aab6582c7456 16 *
maazshaikh 4:aab6582c7456 17 * Development environment specifics:
maazshaikh 4:aab6582c7456 18 * IDE: Arduino 1.0.5
maazshaikh 4:aab6582c7456 19 * Hardware Platform: Arduino Pro 3.3V/8MHz
maazshaikh 4:aab6582c7456 20 * VL6180 Breakout Version: 1.0
maazshaikh 4:aab6582c7456 21 *
maazshaikh 4:aab6582c7456 22 *
maazshaikh 4:aab6582c7456 23 * This code is beerware. If you see me (or any other SparkFun employee) at the
maazshaikh 4:aab6582c7456 24 * local pub, and you've found our code helpful, please buy us a round!
maazshaikh 4:aab6582c7456 25 *
maazshaikh 4:aab6582c7456 26 * Distributed as-is; no warranty is given.
maazshaikh 4:aab6582c7456 27 ******************************************************************************/
sburg 0:f23c00f688b2 28
maazshaikh 4:aab6582c7456 29 #include "VL6180.h"
maazshaikh 4:aab6582c7456 30
maazshaikh 4:aab6582c7456 31 //
maazshaikh 4:aab6582c7456 32 // Constructors
maazshaikh 4:aab6582c7456 33 //
maazshaikh 4:aab6582c7456 34 VL6180::VL6180(PinName sda, PinName scl) : i2c(sda, scl)
maazshaikh 4:aab6582c7456 35 {
maazshaikh 4:aab6582c7456 36 VL6180_i2cAddress = VL6180_DEF_ADDR;
maazshaikh 4:aab6582c7456 37 }
maazshaikh 4:aab6582c7456 38
maazshaikh 4:aab6582c7456 39 VL6180::VL6180(PinName sda, PinName scl, int i2cAddress) : i2c(sda, scl)
maazshaikh 4:aab6582c7456 40 {
maazshaikh 4:aab6582c7456 41 VL6180_i2cAddress = i2cAddress;
maazshaikh 4:aab6582c7456 42 VL6180_error_no = 0;
maazshaikh 4:aab6582c7456 43 }
maazshaikh 4:aab6582c7456 44 //
maazshaikh 4:aab6582c7456 45 // destructor
maazshaikh 4:aab6582c7456 46 //
maazshaikh 4:aab6582c7456 47 VL6180::~VL6180()
maazshaikh 4:aab6582c7456 48 {
sburg 0:f23c00f688b2 49 }
sburg 0:f23c00f688b2 50
maazshaikh 4:aab6582c7456 51 int8_t VL6180::VL6180_Init(void)
maazshaikh 4:aab6582c7456 52 {
maazshaikh 4:aab6582c7456 53 uint8_t data; //for temp data storage
maazshaikh 4:aab6582c7456 54
maazshaikh 4:aab6582c7456 55 data = VL6180_getRegister(VL6180_SYSTEM_FRESH_OUT_OF_RESET);
maazshaikh 4:aab6582c7456 56
maazshaikh 4:aab6582c7456 57 if(data != 1) return VL6180_FAILURE_RESET;
maazshaikh 4:aab6582c7456 58
maazshaikh 4:aab6582c7456 59 //Required by datasheet
maazshaikh 4:aab6582c7456 60 //http://www.st.com/st-web-ui/static/active/en/resource/technical/document/application_note/DM00122600.pdf
maazshaikh 4:aab6582c7456 61 VL6180_setRegister(0x0207, 0x01);
maazshaikh 4:aab6582c7456 62 VL6180_setRegister(0x0208, 0x01);
maazshaikh 4:aab6582c7456 63 VL6180_setRegister(0x0096, 0x00);
maazshaikh 4:aab6582c7456 64 VL6180_setRegister(0x0097, 0xfd);
maazshaikh 4:aab6582c7456 65 VL6180_setRegister(0x00e3, 0x00);
maazshaikh 4:aab6582c7456 66 VL6180_setRegister(0x00e4, 0x04);
maazshaikh 4:aab6582c7456 67 VL6180_setRegister(0x00e5, 0x02);
maazshaikh 4:aab6582c7456 68 VL6180_setRegister(0x00e6, 0x01);
maazshaikh 4:aab6582c7456 69 VL6180_setRegister(0x00e7, 0x03);
maazshaikh 4:aab6582c7456 70 VL6180_setRegister(0x00f5, 0x02);
maazshaikh 4:aab6582c7456 71 VL6180_setRegister(0x00d9, 0x05);
maazshaikh 4:aab6582c7456 72 VL6180_setRegister(0x00db, 0xce);
maazshaikh 4:aab6582c7456 73 VL6180_setRegister(0x00dc, 0x03);
maazshaikh 4:aab6582c7456 74 VL6180_setRegister(0x00dd, 0xf8);
maazshaikh 4:aab6582c7456 75 VL6180_setRegister(0x009f, 0x00);
maazshaikh 4:aab6582c7456 76 VL6180_setRegister(0x00a3, 0x3c);
maazshaikh 4:aab6582c7456 77 VL6180_setRegister(0x00b7, 0x00);
maazshaikh 4:aab6582c7456 78 VL6180_setRegister(0x00bb, 0x3c);
maazshaikh 4:aab6582c7456 79 VL6180_setRegister(0x00b2, 0x09);
maazshaikh 4:aab6582c7456 80 VL6180_setRegister(0x00ca, 0x09);
maazshaikh 4:aab6582c7456 81 VL6180_setRegister(0x0198, 0x01);
maazshaikh 4:aab6582c7456 82 VL6180_setRegister(0x01b0, 0x17);
maazshaikh 4:aab6582c7456 83 VL6180_setRegister(0x01ad, 0x00);
maazshaikh 4:aab6582c7456 84 VL6180_setRegister(0x00ff, 0x05);
maazshaikh 4:aab6582c7456 85 VL6180_setRegister(0x0100, 0x05);
maazshaikh 4:aab6582c7456 86 VL6180_setRegister(0x0199, 0x05);
maazshaikh 4:aab6582c7456 87 VL6180_setRegister(0x01a6, 0x1b);
maazshaikh 4:aab6582c7456 88 VL6180_setRegister(0x01ac, 0x3e);
maazshaikh 4:aab6582c7456 89 VL6180_setRegister(0x01a7, 0x1f);
maazshaikh 4:aab6582c7456 90 VL6180_setRegister(0x0030, 0x00);
maazshaikh 4:aab6582c7456 91
maazshaikh 4:aab6582c7456 92 return 0;
sburg 0:f23c00f688b2 93 }
sburg 0:f23c00f688b2 94
maazshaikh 4:aab6582c7456 95 void VL6180::VL6180_DefautSettings(void)
maazshaikh 4:aab6582c7456 96 {
maazshaikh 4:aab6582c7456 97 //Recommended settings from datasheet
maazshaikh 4:aab6582c7456 98 //http://www.st.com/st-web-ui/static/active/en/resource/technical/document/application_note/DM00122600.pdf
maazshaikh 4:aab6582c7456 99
maazshaikh 4:aab6582c7456 100 //Enable Interrupts on Conversion Complete (any source)
maazshaikh 4:aab6582c7456 101 VL6180_setRegister(VL6180_SYSTEM_INTERRUPT_CONFIG_GPIO, (4 << 3)|(4) ); // Set GPIO1 high when sample complete
maazshaikh 4:aab6582c7456 102
maazshaikh 4:aab6582c7456 103
maazshaikh 4:aab6582c7456 104 VL6180_setRegister(VL6180_SYSTEM_MODE_GPIO1, 0x10); // Set GPIO1 high when sample complete
maazshaikh 4:aab6582c7456 105 VL6180_setRegister(VL6180_READOUT_AVERAGING_SAMPLE_PERIOD, 0x30); //Set Avg sample period
maazshaikh 4:aab6582c7456 106 VL6180_setRegister(VL6180_SYSALS_ANALOGUE_GAIN, 0x46); // Set the ALS gain
maazshaikh 4:aab6582c7456 107 VL6180_setRegister(VL6180_SYSRANGE_VHV_REPEAT_RATE, 0xFF); // Set auto calibration period (Max = 255)/(OFF = 0)
maazshaikh 4:aab6582c7456 108 VL6180_setRegister(VL6180_SYSALS_INTEGRATION_PERIOD, 0x63); // Set ALS integration time to 100ms
maazshaikh 4:aab6582c7456 109 VL6180_setRegister(VL6180_SYSRANGE_VHV_RECALIBRATE, 0x01); // perform a single temperature calibration
maazshaikh 4:aab6582c7456 110 //Optional settings from datasheet
maazshaikh 4:aab6582c7456 111 //http://www.st.com/st-web-ui/static/active/en/resource/technical/document/application_note/DM00122600.pdf
maazshaikh 4:aab6582c7456 112 VL6180_setRegister(VL6180_SYSRANGE_INTERMEASUREMENT_PERIOD, 0x09); // Set default ranging inter-measurement period to 100ms
maazshaikh 4:aab6582c7456 113 VL6180_setRegister(VL6180_SYSALS_INTERMEASUREMENT_PERIOD, 0x0A); // Set default ALS inter-measurement period to 100ms
maazshaikh 4:aab6582c7456 114 VL6180_setRegister(VL6180_SYSTEM_INTERRUPT_CONFIG_GPIO, 0x24); // Configures interrupt on ‘New Sample Ready threshold event’
maazshaikh 4:aab6582c7456 115 //Additional settings defaults from community
maazshaikh 4:aab6582c7456 116 VL6180_setRegister(VL6180_SYSRANGE_MAX_CONVERGENCE_TIME, 0x32);
maazshaikh 4:aab6582c7456 117 VL6180_setRegister(VL6180_SYSRANGE_RANGE_CHECK_ENABLES, 0x10 | 0x01);
maazshaikh 4:aab6582c7456 118 VL6180_setRegister16bit(VL6180_SYSRANGE_EARLY_CONVERGENCE_ESTIMATE, 0x7B );
maazshaikh 4:aab6582c7456 119 VL6180_setRegister16bit(VL6180_SYSALS_INTEGRATION_PERIOD, 0x64);
maazshaikh 4:aab6582c7456 120
maazshaikh 4:aab6582c7456 121 VL6180_setRegister(VL6180_READOUT_AVERAGING_SAMPLE_PERIOD,0x30);
maazshaikh 4:aab6582c7456 122 VL6180_setRegister(VL6180_SYSALS_ANALOGUE_GAIN,0x40);
maazshaikh 4:aab6582c7456 123 VL6180_setRegister(VL6180_FIRMWARE_RESULT_SCALER,0x01);
maazshaikh 4:aab6582c7456 124 }
maazshaikh 4:aab6582c7456 125 void VL6180::getIdentification(struct VL6180Identification *temp)
maazshaikh 4:aab6582c7456 126 {
maazshaikh 4:aab6582c7456 127
maazshaikh 4:aab6582c7456 128 temp->idModel = VL6180_getRegister(VL6180_IDENTIFICATION_MODEL_ID);
maazshaikh 4:aab6582c7456 129 temp->idModelRevMajor = VL6180_getRegister(VL6180_IDENTIFICATION_MODEL_REV_MAJOR);
maazshaikh 4:aab6582c7456 130 temp->idModelRevMinor = VL6180_getRegister(VL6180_IDENTIFICATION_MODEL_REV_MINOR);
maazshaikh 4:aab6582c7456 131 temp->idModuleRevMajor = VL6180_getRegister(VL6180_IDENTIFICATION_MODULE_REV_MAJOR);
maazshaikh 4:aab6582c7456 132 temp->idModuleRevMinor = VL6180_getRegister(VL6180_IDENTIFICATION_MODULE_REV_MINOR);
maazshaikh 4:aab6582c7456 133
maazshaikh 4:aab6582c7456 134 temp->idDate = VL6180_getRegister16bit(VL6180_IDENTIFICATION_DATE);
maazshaikh 4:aab6582c7456 135 temp->idTime = VL6180_getRegister16bit(VL6180_IDENTIFICATION_TIME);
sburg 0:f23c00f688b2 136 }
sburg 0:f23c00f688b2 137
sburg 0:f23c00f688b2 138
maazshaikh 4:aab6582c7456 139 uint8_t VL6180::changeAddress(uint8_t old_address, uint8_t new_address)
maazshaikh 4:aab6582c7456 140 {
maazshaikh 4:aab6582c7456 141
maazshaikh 4:aab6582c7456 142 //NOTICE: IT APPEARS THAT CHANGING THE ADDRESS IS NOT STORED IN NON-VOLATILE MEMORY
maazshaikh 4:aab6582c7456 143 // POWER CYCLING THE DEVICE REVERTS ADDRESS BACK TO 0X29
maazshaikh 4:aab6582c7456 144
maazshaikh 4:aab6582c7456 145 if( old_address == new_address) return old_address;
maazshaikh 4:aab6582c7456 146 if( new_address > 127) return old_address;
maazshaikh 4:aab6582c7456 147
maazshaikh 4:aab6582c7456 148 VL6180_setRegister(VL6180_I2C_SLAVE_DEVICE_ADDRESS, new_address);
maazshaikh 4:aab6582c7456 149
maazshaikh 4:aab6582c7456 150 return VL6180_getRegister(VL6180_I2C_SLAVE_DEVICE_ADDRESS);
maazshaikh 4:aab6582c7456 151 }
maazshaikh 4:aab6582c7456 152
maazshaikh 4:aab6582c7456 153
maazshaikh 4:aab6582c7456 154
maazshaikh 4:aab6582c7456 155 uint8_t VL6180::getDistance()
maazshaikh 4:aab6582c7456 156 {
maazshaikh 4:aab6582c7456 157 VL6180_setRegister(VL6180_SYSRANGE_START, 0x01); //Start Single shot mode
maazshaikh 4:aab6582c7456 158 wait(0.01); // 10mS
maazshaikh 4:aab6582c7456 159 return VL6180_getRegister(VL6180_RESULT_RANGE_VAL);
maazshaikh 4:aab6582c7456 160 // VL6180_setRegister(VL6180_SYSTEM_INTERRUPT_CLEAR, 0x07);
maazshaikh 4:aab6582c7456 161 // return distance;
sburg 0:f23c00f688b2 162 }
sburg 0:f23c00f688b2 163
maazshaikh 4:aab6582c7456 164 float VL6180::getAmbientLight(VL6180_als_gain VL6180_ALS_GAIN)
maazshaikh 4:aab6582c7456 165 {
maazshaikh 4:aab6582c7456 166 //First load in Gain we are using, do it everytime incase someone changes it on us.
maazshaikh 4:aab6582c7456 167 //Note: Upper nibble shoudl be set to 0x4 i.e. for ALS gain of 1.0 write 0x46
maazshaikh 4:aab6582c7456 168 VL6180_setRegister(VL6180_SYSALS_ANALOGUE_GAIN, (0x40 | VL6180_ALS_GAIN)); // Set the ALS gain
maazshaikh 4:aab6582c7456 169
maazshaikh 4:aab6582c7456 170 //Start ALS Measurement
maazshaikh 4:aab6582c7456 171 VL6180_setRegister(VL6180_SYSALS_START, 0x01);
maazshaikh 4:aab6582c7456 172
maazshaikh 4:aab6582c7456 173 wait(0.1); //100Ms
maazshaikh 4:aab6582c7456 174
maazshaikh 4:aab6582c7456 175 VL6180_setRegister(VL6180_SYSTEM_INTERRUPT_CLEAR, 0x07);
maazshaikh 4:aab6582c7456 176
maazshaikh 4:aab6582c7456 177 //Retrieve the Raw ALS value from the sensoe
maazshaikh 4:aab6582c7456 178 unsigned int alsRaw = VL6180_getRegister16bit(VL6180_RESULT_ALS_VAL);
maazshaikh 4:aab6582c7456 179
maazshaikh 4:aab6582c7456 180 //Get Integration Period for calculation, we do this everytime incase someone changes it on us.
maazshaikh 4:aab6582c7456 181 unsigned int alsIntegrationPeriodRaw = VL6180_getRegister16bit(VL6180_SYSALS_INTEGRATION_PERIOD);
maazshaikh 4:aab6582c7456 182
maazshaikh 4:aab6582c7456 183 float alsIntegrationPeriod = 100.0 / alsIntegrationPeriodRaw ;
maazshaikh 4:aab6582c7456 184
maazshaikh 4:aab6582c7456 185 //Calculate actual LUX from Appnotes
maazshaikh 4:aab6582c7456 186
maazshaikh 4:aab6582c7456 187 float alsGain = 0.0;
maazshaikh 4:aab6582c7456 188
maazshaikh 4:aab6582c7456 189 switch (VL6180_ALS_GAIN) {
maazshaikh 4:aab6582c7456 190 case GAIN_20:
maazshaikh 4:aab6582c7456 191 alsGain = 20.0;
maazshaikh 4:aab6582c7456 192 break;
maazshaikh 4:aab6582c7456 193 case GAIN_10:
maazshaikh 4:aab6582c7456 194 alsGain = 10.32;
maazshaikh 4:aab6582c7456 195 break;
maazshaikh 4:aab6582c7456 196 case GAIN_5:
maazshaikh 4:aab6582c7456 197 alsGain = 5.21;
maazshaikh 4:aab6582c7456 198 break;
maazshaikh 4:aab6582c7456 199 case GAIN_2_5:
maazshaikh 4:aab6582c7456 200 alsGain = 2.60;
maazshaikh 4:aab6582c7456 201 break;
maazshaikh 4:aab6582c7456 202 case GAIN_1_67:
maazshaikh 4:aab6582c7456 203 alsGain = 1.72;
maazshaikh 4:aab6582c7456 204 break;
maazshaikh 4:aab6582c7456 205 case GAIN_1_25:
maazshaikh 4:aab6582c7456 206 alsGain = 1.28;
maazshaikh 4:aab6582c7456 207 break;
maazshaikh 4:aab6582c7456 208 case GAIN_1:
maazshaikh 4:aab6582c7456 209 alsGain = 1.01;
maazshaikh 4:aab6582c7456 210 break;
maazshaikh 4:aab6582c7456 211 case GAIN_40:
maazshaikh 4:aab6582c7456 212 alsGain = 40.0;
maazshaikh 4:aab6582c7456 213 break;
maazshaikh 4:aab6582c7456 214 }
maazshaikh 4:aab6582c7456 215
maazshaikh 4:aab6582c7456 216 //Calculate LUX from formula in AppNotes
maazshaikh 4:aab6582c7456 217
maazshaikh 4:aab6582c7456 218 float alsCalculated = (float)0.32 * ((float)alsRaw / alsGain) * alsIntegrationPeriod;
maazshaikh 4:aab6582c7456 219
maazshaikh 4:aab6582c7456 220 return alsCalculated;
maazshaikh 4:aab6582c7456 221 }
maazshaikh 4:aab6582c7456 222
maazshaikh 4:aab6582c7456 223 // --- Private Functions --- //
maazshaikh 4:aab6582c7456 224
maazshaikh 4:aab6582c7456 225 uint8_t VL6180::VL6180_getRegister(uint16_t reg_address)
maazshaikh 4:aab6582c7456 226 {
maazshaikh 4:aab6582c7456 227 char data[2];
maazshaikh 4:aab6582c7456 228
maazshaikh 4:aab6582c7456 229 data[0] = (reg_address >> 8) & 0xFF; //MSB of register address
maazshaikh 4:aab6582c7456 230 data[1] = reg_address & 0xFF; //LSB of register address
maazshaikh 4:aab6582c7456 231 VL6180_error_no = i2c.write(VL6180_i2cAddress, data, 2);
maazshaikh 4:aab6582c7456 232 VL6180_error_no = i2c.read(VL6180_i2cAddress, data, 1, false);
maazshaikh 4:aab6582c7456 233 return data[0];
maazshaikh 4:aab6582c7456 234 }
maazshaikh 4:aab6582c7456 235
maazshaikh 4:aab6582c7456 236 uint16_t VL6180::VL6180_getRegister16bit(uint16_t reg_address)
maazshaikh 4:aab6582c7456 237 {
maazshaikh 4:aab6582c7456 238 char data[2];
maazshaikh 4:aab6582c7456 239
maazshaikh 4:aab6582c7456 240 data[0] = (reg_address >> 8) & 0xFF; //MSB of register address
maazshaikh 4:aab6582c7456 241 data[1] = reg_address & 0xFF; //LSB of register address
maazshaikh 4:aab6582c7456 242 VL6180_error_no = i2c.write(VL6180_i2cAddress, data, 2);
maazshaikh 4:aab6582c7456 243 VL6180_error_no = i2c.read(VL6180_i2cAddress, data, 2, false);
maazshaikh 4:aab6582c7456 244 return (data[0] + ((data[1] << 8) & 0xFF00));
maazshaikh 4:aab6582c7456 245 }
maazshaikh 4:aab6582c7456 246
maazshaikh 4:aab6582c7456 247 void VL6180::VL6180_setRegister(uint16_t reg_address, uint8_t value)
maazshaikh 4:aab6582c7456 248 {
maazshaikh 4:aab6582c7456 249 char data[3];
maazshaikh 4:aab6582c7456 250
maazshaikh 4:aab6582c7456 251 data[0] = (reg_address >> 8) & 0xFF; //MSB of register address
maazshaikh 4:aab6582c7456 252 data[1] = reg_address & 0xFF; //LSB of register address
maazshaikh 4:aab6582c7456 253 data[2] = value;
maazshaikh 4:aab6582c7456 254 VL6180_error_no = VL6180_error_no = i2c.write(VL6180_i2cAddress, data, 3);
maazshaikh 4:aab6582c7456 255 }
maazshaikh 4:aab6582c7456 256
maazshaikh 4:aab6582c7456 257 void VL6180::VL6180_setRegister16bit(uint16_t reg_address, uint16_t value)
maazshaikh 4:aab6582c7456 258 {
maazshaikh 4:aab6582c7456 259 char data[4];
maazshaikh 4:aab6582c7456 260
maazshaikh 4:aab6582c7456 261 data[0] = (reg_address >> 8) & 0xFF; //MSB of register address
maazshaikh 4:aab6582c7456 262 data[1] = reg_address & 0xFF; //LSB of register address
maazshaikh 4:aab6582c7456 263 data[2] = value & 0xFF;
maazshaikh 4:aab6582c7456 264 data[3] = ((value >> 8) & 0xFF);
maazshaikh 4:aab6582c7456 265 VL6180_error_no = VL6180_error_no = i2c.write(VL6180_i2cAddress, data, 4);
maazshaikh 4:aab6582c7456 266 }
maazshaikh 4:aab6582c7456 267
maazshaikh 4:aab6582c7456 268 int VL6180::writeSingleRegister( uint16_t reg_address, uint8_t data )
maazshaikh 4:aab6582c7456 269 {
maazshaikh 4:aab6582c7456 270
maazshaikh 4:aab6582c7456 271 char data_write[3];
maazshaikh 4:aab6582c7456 272 data_write[0] = (reg_address >> 8) & 0xFF; //MSB of register address
maazshaikh 4:aab6582c7456 273 data_write[1] = reg_address & 0xFF; //LSB of register address
maazshaikh 4:aab6582c7456 274 data_write[2] = data & 0xFF;
maazshaikh 4:aab6582c7456 275 return i2c.write(VL6180_DEF_ADDR, data_write, 3);
maazshaikh 4:aab6582c7456 276
maazshaikh 4:aab6582c7456 277 // char tx[2] = { address | 160, data }; //0d160 = 0b10100000
maazshaikh 4:aab6582c7456 278 // int ack = i2c.write( SLAVE_ADDRESS << 1, tx, 2 );
maazshaikh 4:aab6582c7456 279 // return ack;
sburg 0:f23c00f688b2 280 }
sburg 0:f23c00f688b2 281