Multi-Hackers / ISL29011

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ISL29011.cpp@0:b37e4acdfa7b, 2015-07-06 (annotated)

Committer:
falingtrea
Date:
Mon Jul 06 19:35:14 2015 +0000
Revision:
0:b37e4acdfa7b
Child:
1:f5b5a0477f46
Initial release

Who changed what in which revision?

UserRevisionLine numberNew contents of line
falingtrea 0:b37e4acdfa7b 1 /**
falingtrea 0:b37e4acdfa7b 2 * @file ISL29011.cpp
falingtrea 0:b37e4acdfa7b 3 * @brief Device driver - ISL29011 Ambient Light/IR Proximity Sensor IC
falingtrea 0:b37e4acdfa7b 4 * @author Tim Barr
falingtrea 0:b37e4acdfa7b 5 * @version 1.0
falingtrea 0:b37e4acdfa7b 6 * @see http://www.intersil.com/content/dam/Intersil/documents/isl2/isl29011.pdf
falingtrea 0:b37e4acdfa7b 7 *
falingtrea 0:b37e4acdfa7b 8 * Copyright (c) 2015
falingtrea 0:b37e4acdfa7b 9 *
falingtrea 0:b37e4acdfa7b 10 * Licensed under the Apache License, Version 2.0 (the "License");
falingtrea 0:b37e4acdfa7b 11 * you may not use this file except in compliance with the License.
falingtrea 0:b37e4acdfa7b 12 * You may obtain a copy of the License at
falingtrea 0:b37e4acdfa7b 13 *
falingtrea 0:b37e4acdfa7b 14 * http://www.apache.org/licenses/LICENSE-2.0
falingtrea 0:b37e4acdfa7b 15 *
falingtrea 0:b37e4acdfa7b 16 * Unless required by applicable law or agreed to in writing, software
falingtrea 0:b37e4acdfa7b 17 * distributed under the License is distributed on an "AS IS" BASIS,
falingtrea 0:b37e4acdfa7b 18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
falingtrea 0:b37e4acdfa7b 19 * See the License for the specific language governing permissions and
falingtrea 0:b37e4acdfa7b 20 * limitations under the License.
falingtrea 0:b37e4acdfa7b 21 */
falingtrea 0:b37e4acdfa7b 22
falingtrea 0:b37e4acdfa7b 23 #include "ISL29011.h"
falingtrea 0:b37e4acdfa7b 24 #include "mbed_debug.h"
falingtrea 0:b37e4acdfa7b 25
falingtrea 0:b37e4acdfa7b 26 ISL29011::ISL29011(I2C &i2c, InterruptIn* isl_int = NULL)
falingtrea 0:b37e4acdfa7b 27 {
falingtrea 0:b37e4acdfa7b 28 _i2c = &i2c;
falingtrea 0:b37e4acdfa7b 29 _isl_int = isl_int;
falingtrea 0:b37e4acdfa7b 30
falingtrea 0:b37e4acdfa7b 31 ISL29011::init();
falingtrea 0:b37e4acdfa7b 32
falingtrea 0:b37e4acdfa7b 33 return;
falingtrea 0:b37e4acdfa7b 34 }
falingtrea 0:b37e4acdfa7b 35
falingtrea 0:b37e4acdfa7b 36 uint8_t ISL29011::init(void)
falingtrea 0:b37e4acdfa7b 37 {
falingtrea 0:b37e4acdfa7b 38 uint8_t result = 0;
falingtrea 0:b37e4acdfa7b 39
falingtrea 0:b37e4acdfa7b 40 _i2c->frequency(400000);
falingtrea 0:b37e4acdfa7b 41
falingtrea 0:b37e4acdfa7b 42 // Reset all registers to POR values
falingtrea 0:b37e4acdfa7b 43 result = ISL29011::writeRegister(COMMAND1, 0x00);
falingtrea 0:b37e4acdfa7b 44
falingtrea 0:b37e4acdfa7b 45 if (result == 0){
falingtrea 0:b37e4acdfa7b 46 if (_isl_int == NULL)
falingtrea 0:b37e4acdfa7b 47 _polling_mode = true;
falingtrea 0:b37e4acdfa7b 48 else _polling_mode = false;
falingtrea 0:b37e4acdfa7b 49
falingtrea 0:b37e4acdfa7b 50 result = ISL29011::writeRegister(COMMAND2, 0x00);
falingtrea 0:b37e4acdfa7b 51 result = ISL29011::writeRegister(INT_LT_LSB, 0x00);
falingtrea 0:b37e4acdfa7b 52 result = ISL29011::writeRegister(INT_LT_MSB, 0x00);
falingtrea 0:b37e4acdfa7b 53 result = ISL29011::writeRegister(INT_HT_LSB, 0xFF);
falingtrea 0:b37e4acdfa7b 54 result = ISL29011::writeRegister(INT_HT_MSB, 0xFF);
falingtrea 0:b37e4acdfa7b 55 }
falingtrea 0:b37e4acdfa7b 56
falingtrea 0:b37e4acdfa7b 57 if(result != 0)
falingtrea 0:b37e4acdfa7b 58 {
falingtrea 0:b37e4acdfa7b 59 debug("ILS29011:init failed\n\r");
falingtrea 0:b37e4acdfa7b 60 }
falingtrea 0:b37e4acdfa7b 61
falingtrea 0:b37e4acdfa7b 62 return result;
falingtrea 0:b37e4acdfa7b 63 }
falingtrea 0:b37e4acdfa7b 64
falingtrea 0:b37e4acdfa7b 65 /** Get the data
falingtrea 0:b37e4acdfa7b 66 * @return The last valid LUX reading from the ambient light sensor
falingtrea 0:b37e4acdfa7b 67 */
falingtrea 0:b37e4acdfa7b 68 uint16_t ISL29011::getData(void)
falingtrea 0:b37e4acdfa7b 69 {
falingtrea 0:b37e4acdfa7b 70 if (_polling_mode)
falingtrea 0:b37e4acdfa7b 71 {
falingtrea 0:b37e4acdfa7b 72 char datain[2];
falingtrea 0:b37e4acdfa7b 73
falingtrea 0:b37e4acdfa7b 74 ISL29011::readRegister(DATA_LSB, datain, 2);
falingtrea 0:b37e4acdfa7b 75 _lux_data = (datain[1] << 8) | datain[0];
falingtrea 0:b37e4acdfa7b 76 }
falingtrea 0:b37e4acdfa7b 77 return _lux_data;
falingtrea 0:b37e4acdfa7b 78 }
falingtrea 0:b37e4acdfa7b 79
falingtrea 0:b37e4acdfa7b 80 /** Setup the ISL29011 measurement mode
falingtrea 0:b37e4acdfa7b 81 * @return status of command
falingtrea 0:b37e4acdfa7b 82 */
falingtrea 0:b37e4acdfa7b 83 uint8_t ISL29011::setMode(OPERATION_MODE op_mode) const
falingtrea 0:b37e4acdfa7b 84 {
falingtrea 0:b37e4acdfa7b 85 uint8_t result = 0;
falingtrea 0:b37e4acdfa7b 86 char datain[1];
falingtrea 0:b37e4acdfa7b 87 char dataout;
falingtrea 0:b37e4acdfa7b 88
falingtrea 0:b37e4acdfa7b 89
falingtrea 0:b37e4acdfa7b 90 result |= ISL29011::readRegister(COMMAND1,datain);
falingtrea 0:b37e4acdfa7b 91 dataout = (datain[0] & 0x1F) | op_mode;
falingtrea 0:b37e4acdfa7b 92 result |= ISL29011::writeRegister(COMMAND1, dataout);
falingtrea 0:b37e4acdfa7b 93 return result;
falingtrea 0:b37e4acdfa7b 94
falingtrea 0:b37e4acdfa7b 95 }
falingtrea 0:b37e4acdfa7b 96
falingtrea 0:b37e4acdfa7b 97 /** Set Interrupt Persistence Threshold
falingtrea 0:b37e4acdfa7b 98 * @return status of command
falingtrea 0:b37e4acdfa7b 99 */
falingtrea 0:b37e4acdfa7b 100 uint8_t ISL29011::setPersistence(INT_PERSIST int_persist) const
falingtrea 0:b37e4acdfa7b 101 {
falingtrea 0:b37e4acdfa7b 102 uint8_t result = 0;
falingtrea 0:b37e4acdfa7b 103 char datain[1];
falingtrea 0:b37e4acdfa7b 104 char dataout;
falingtrea 0:b37e4acdfa7b 105
falingtrea 0:b37e4acdfa7b 106
falingtrea 0:b37e4acdfa7b 107 result |= ISL29011::readRegister(COMMAND1,datain);
falingtrea 0:b37e4acdfa7b 108 dataout = (datain[0] & 0xFC) | int_persist;
falingtrea 0:b37e4acdfa7b 109 result |= ISL29011::writeRegister(COMMAND1, dataout);
falingtrea 0:b37e4acdfa7b 110
falingtrea 0:b37e4acdfa7b 111 return result;
falingtrea 0:b37e4acdfa7b 112 }
falingtrea 0:b37e4acdfa7b 113
falingtrea 0:b37e4acdfa7b 114 /** Set Proximity measurement parameters
falingtrea 0:b37e4acdfa7b 115 * @return status of command
falingtrea 0:b37e4acdfa7b 116 */
falingtrea 0:b37e4acdfa7b 117 uint8_t ISL29011::setProximity(PROX_SCHEME prox_scheme, MOD_FREQ mod_freq, LED_DRIVE led_drive) const
falingtrea 0:b37e4acdfa7b 118 {
falingtrea 0:b37e4acdfa7b 119 uint8_t result = 0;
falingtrea 0:b37e4acdfa7b 120 char datain[1];
falingtrea 0:b37e4acdfa7b 121 char dataout;
falingtrea 0:b37e4acdfa7b 122
falingtrea 0:b37e4acdfa7b 123
falingtrea 0:b37e4acdfa7b 124 result |= ISL29011::readRegister(COMMAND2,datain);
falingtrea 0:b37e4acdfa7b 125 dataout = (datain[0] & 0x0F) | prox_scheme | mod_freq | led_drive;
falingtrea 0:b37e4acdfa7b 126 result |= ISL29011::writeRegister(COMMAND2, dataout);
falingtrea 0:b37e4acdfa7b 127
falingtrea 0:b37e4acdfa7b 128 return result;
falingtrea 0:b37e4acdfa7b 129 }
falingtrea 0:b37e4acdfa7b 130
falingtrea 0:b37e4acdfa7b 131 /** Set ADC Resolution
falingtrea 0:b37e4acdfa7b 132 * @return status of command
falingtrea 0:b37e4acdfa7b 133 */
falingtrea 0:b37e4acdfa7b 134 uint8_t ISL29011::setResolution(ADC_RESOLUTION adc_resolution) const
falingtrea 0:b37e4acdfa7b 135 {
falingtrea 0:b37e4acdfa7b 136 uint8_t result = 0;
falingtrea 0:b37e4acdfa7b 137 char datain[1];
falingtrea 0:b37e4acdfa7b 138 char dataout;
falingtrea 0:b37e4acdfa7b 139
falingtrea 0:b37e4acdfa7b 140
falingtrea 0:b37e4acdfa7b 141 result |= ISL29011::readRegister(COMMAND2,datain);
falingtrea 0:b37e4acdfa7b 142 dataout = (datain[0] & 0xF3) | adc_resolution;
falingtrea 0:b37e4acdfa7b 143 result |= ISL29011::writeRegister(COMMAND2, dataout);
falingtrea 0:b37e4acdfa7b 144
falingtrea 0:b37e4acdfa7b 145 return result;
falingtrea 0:b37e4acdfa7b 146 }
falingtrea 0:b37e4acdfa7b 147
falingtrea 0:b37e4acdfa7b 148 /** Set the LUX Full Scale measurement range
falingtrea 0:b37e4acdfa7b 149 * @return status of command
falingtrea 0:b37e4acdfa7b 150 */
falingtrea 0:b37e4acdfa7b 151 uint8_t ISL29011::setRange(LUX_RANGE lux_range ) const
falingtrea 0:b37e4acdfa7b 152 {
falingtrea 0:b37e4acdfa7b 153 uint8_t result = 0;
falingtrea 0:b37e4acdfa7b 154 char datain[1];
falingtrea 0:b37e4acdfa7b 155 char dataout;
falingtrea 0:b37e4acdfa7b 156
falingtrea 0:b37e4acdfa7b 157
falingtrea 0:b37e4acdfa7b 158 result |= ISL29011::readRegister(COMMAND2,datain);
falingtrea 0:b37e4acdfa7b 159 dataout = (datain[0] & 0xFC) | lux_range;
falingtrea 0:b37e4acdfa7b 160 result |= ISL29011::writeRegister(COMMAND2, dataout);
falingtrea 0:b37e4acdfa7b 161
falingtrea 0:b37e4acdfa7b 162 return result;
falingtrea 0:b37e4acdfa7b 163 }
falingtrea 0:b37e4acdfa7b 164
falingtrea 0:b37e4acdfa7b 165
falingtrea 0:b37e4acdfa7b 166 uint8_t ISL29011::writeRegister(uint8_t const reg, uint8_t const data) const
falingtrea 0:b37e4acdfa7b 167 {
falingtrea 0:b37e4acdfa7b 168 char buf[2] = {reg, data};
falingtrea 0:b37e4acdfa7b 169 uint8_t result = 0;
falingtrea 0:b37e4acdfa7b 170
falingtrea 0:b37e4acdfa7b 171 buf[0] = reg;
falingtrea 0:b37e4acdfa7b 172 buf[1] = data;
falingtrea 0:b37e4acdfa7b 173
falingtrea 0:b37e4acdfa7b 174 // __disable_irq(); // Tickers and other timebase events can jack up the I2C bus for some devices
falingtrea 0:b37e4acdfa7b 175 result |= _i2c->write(_i2c_addr, buf, 2);
falingtrea 0:b37e4acdfa7b 176 // __enable_irq(); // Just need to block during the transaction
falingtrea 0:b37e4acdfa7b 177
falingtrea 0:b37e4acdfa7b 178 if(result != 0)
falingtrea 0:b37e4acdfa7b 179 {
falingtrea 0:b37e4acdfa7b 180 debug("ISL29011:writeRegister failed\n\r");
falingtrea 0:b37e4acdfa7b 181 }
falingtrea 0:b37e4acdfa7b 182
falingtrea 0:b37e4acdfa7b 183 return result;
falingtrea 0:b37e4acdfa7b 184 }
falingtrea 0:b37e4acdfa7b 185
falingtrea 0:b37e4acdfa7b 186 uint8_t ISL29011::readRegister(uint8_t const reg, char* data, uint8_t count) const
falingtrea 0:b37e4acdfa7b 187 {
falingtrea 0:b37e4acdfa7b 188 uint8_t result = 0;
falingtrea 0:b37e4acdfa7b 189 char reg_out[1];
falingtrea 0:b37e4acdfa7b 190
falingtrea 0:b37e4acdfa7b 191 reg_out[0] = reg;
falingtrea 0:b37e4acdfa7b 192 // __disable_irq(); // Tickers and other timebase events can jack up the I2C bus for some devices
falingtrea 0:b37e4acdfa7b 193 result |= _i2c->write(_i2c_addr,reg_out,1,true);
falingtrea 0:b37e4acdfa7b 194 // __enable_irq(); // Just need to block during the transaction
falingtrea 0:b37e4acdfa7b 195
falingtrea 0:b37e4acdfa7b 196 if(result != 0)
falingtrea 0:b37e4acdfa7b 197 {
falingtrea 0:b37e4acdfa7b 198 debug("ISL29011::readRegister failed write\n\r");
falingtrea 0:b37e4acdfa7b 199 return result;
falingtrea 0:b37e4acdfa7b 200 }
falingtrea 0:b37e4acdfa7b 201
falingtrea 0:b37e4acdfa7b 202 // __disable_irq(); // Tickers and other timebase events can jack up the I2C bus for some devices
falingtrea 0:b37e4acdfa7b 203 result |= _i2c->read(_i2c_addr,data,count,false);
falingtrea 0:b37e4acdfa7b 204 // __enable_irq(); // Just need to block during the transaction
falingtrea 0:b37e4acdfa7b 205
falingtrea 0:b37e4acdfa7b 206 if(result != 0)
falingtrea 0:b37e4acdfa7b 207 {
falingtrea 0:b37e4acdfa7b 208 debug("ISL29011::readRegister failed read\n\r");
falingtrea 0:b37e4acdfa7b 209 }
falingtrea 0:b37e4acdfa7b 210
falingtrea 0:b37e4acdfa7b 211 return result;
falingtrea 0:b37e4acdfa7b 212 }
falingtrea 0:b37e4acdfa7b 213
falingtrea 0:b37e4acdfa7b 214