MSS / MAX30101

Library for MAX30101, read/write functions for registers implemented.

Dependents:   test_MAX30101 testSensor

MAX30101.cpp@4:c6761ad52524, 2017-03-27 (annotated)

Committer:
Rhyme
Date:
Mon Mar 27 07:10:39 2017 +0000
Revision:
4:c6761ad52524
Parent:
2:c465a8d44b9a
Child:
5:7e7ad1807454
Descriptions added

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Rhyme 0:4ad9373787e8 1 /**
Rhyme 0:4ad9373787e8 2 * MAX30101
Rhyme 0:4ad9373787e8 3 * High-Sensitivity Pulse Oximeter and
Rhyme 0:4ad9373787e8 4 * Heart-Rate Sensor for Wearable Health
Rhyme 0:4ad9373787e8 5 */
Rhyme 0:4ad9373787e8 6 #include "mbed.h"
Rhyme 0:4ad9373787e8 7 #include "MAX30101.h"
Rhyme 0:4ad9373787e8 8
Rhyme 0:4ad9373787e8 9 /* Status */
Rhyme 0:4ad9373787e8 10 #define REG_INT_MSB 0x00 /* Interrupt Status 1 */
Rhyme 0:4ad9373787e8 11 #define REG_INT_LSB 0x01 /* Interrupt Status 2 */
Rhyme 0:4ad9373787e8 12 #define REG_INT_ENB_MSB 0x02 /* Interrupt Enable 1 */
Rhyme 0:4ad9373787e8 13 #define REG_INT_ENB_LSB 0x03 /* Interrupt Enable 2 */
Rhyme 0:4ad9373787e8 14 /* FIFO */
Rhyme 0:4ad9373787e8 15 #define REG_FIFO_WR_PTR 0x04 /* FIFO Write Pointer */
Rhyme 0:4ad9373787e8 16 #define REG_OVF_COUNTER 0x05 /* Overflow Counter */
Rhyme 0:4ad9373787e8 17 #define REG_FIFO_RD_PTR 0x06 /* FIFO Read Pointer */
Rhyme 0:4ad9373787e8 18 #define REG_FIFO_DATA 0x07 /* FIFO Data Register */
Rhyme 0:4ad9373787e8 19 /* Configuration */
Rhyme 0:4ad9373787e8 20 #define REG_FIFO_CONFIG 0x08 /* FIFO Configuration */
Rhyme 0:4ad9373787e8 21 #define REG_MODE_CONFIG 0x09 /* Mode Configuration */
Rhyme 0:4ad9373787e8 22 #define REG_SPO2_CONFIG 0x0A /* SpO2 Configuration */
Rhyme 0:4ad9373787e8 23 /* reserved 0x0B */
Rhyme 0:4ad9373787e8 24 #define REG_LED1_PA 0x0C /* LED Pulse Amplitude 1 */
Rhyme 0:4ad9373787e8 25 #define REG_LED2_PA 0x0D /* LED Pulse Amplitude 2 */
Rhyme 0:4ad9373787e8 26 #define REG_LED3_PA 0x0E /* LED Pulse Amplitude 3 */
Rhyme 0:4ad9373787e8 27 /* reserved 0x0F */
Rhyme 0:4ad9373787e8 28 #define REG_PILOT_PA 0x10 /* Proximity LED Pulse Amplitude */
Rhyme 0:4ad9373787e8 29 #define REG_SLOT_MSB 0x11 /* Multi-LED Mode Control Registers 2, 1 */
Rhyme 0:4ad9373787e8 30 #define REG_SLOT_LSB 0x12 /* Multi-LED Mode Control Registers 4, 3 */
Rhyme 0:4ad9373787e8 31 /* DIE Temperature */
Rhyme 0:4ad9373787e8 32 #define REG_TEMP_INT 0x1F /* Die Temperature Integer */
Rhyme 0:4ad9373787e8 33 #define REG_TEMP_FRAC 0x20 /* Die Temperature Fraction */
Rhyme 0:4ad9373787e8 34 #define REG_TEMP_EN 0x21 /* Die Temperature Config */
Rhyme 0:4ad9373787e8 35 /* Proximity Function */
Rhyme 1:fc677d82d0f1 36 #define REG_PROX_INT_THR 0x30 /* Proximity Interrupt Threshold */
Rhyme 0:4ad9373787e8 37 /* Part ID */
Rhyme 0:4ad9373787e8 38 #define REG_REV_ID 0xFE /* Revision ID */
Rhyme 0:4ad9373787e8 39 #define REG_PART_ID 0xFF /* Part ID: 0x15 */
Rhyme 2:c465a8d44b9a 40 /* Depth of FIFO */
Rhyme 2:c465a8d44b9a 41 #define FIFO_DEPTH 32
Rhyme 0:4ad9373787e8 42
Rhyme 0:4ad9373787e8 43 MAX30101::MAX30101(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr<<1) {
Rhyme 0:4ad9373787e8 44 // activate the peripheral
Rhyme 0:4ad9373787e8 45 }
Rhyme 0:4ad9373787e8 46
Rhyme 0:4ad9373787e8 47 MAX30101::~MAX30101() { }
Rhyme 0:4ad9373787e8 48
Rhyme 0:4ad9373787e8 49 void MAX30101::readRegs(int addr, uint8_t * data, int len) {
Rhyme 0:4ad9373787e8 50 char t[1] = {addr} ;
Rhyme 0:4ad9373787e8 51 m_i2c.write(m_addr, t, 1, true) ;
Rhyme 0:4ad9373787e8 52 m_i2c.read(m_addr, (char*)data, len) ;
Rhyme 0:4ad9373787e8 53 }
Rhyme 0:4ad9373787e8 54
Rhyme 0:4ad9373787e8 55 void MAX30101::writeRegs(uint8_t * data, int len) {
Rhyme 0:4ad9373787e8 56 m_i2c.write(m_addr, (char *)data, len) ;
Rhyme 0:4ad9373787e8 57 }
Rhyme 0:4ad9373787e8 58
Rhyme 0:4ad9373787e8 59 uint8_t MAX30101::getID(void)
Rhyme 0:4ad9373787e8 60 {
Rhyme 0:4ad9373787e8 61 uint8_t id ;
Rhyme 0:4ad9373787e8 62 readRegs(REG_PART_ID, &id, 1) ;
Rhyme 0:4ad9373787e8 63 return( id ) ;
Rhyme 0:4ad9373787e8 64 }
Rhyme 0:4ad9373787e8 65
Rhyme 0:4ad9373787e8 66 uint8_t MAX30101::getRev(void)
Rhyme 0:4ad9373787e8 67 {
Rhyme 0:4ad9373787e8 68 uint8_t rev ;
Rhyme 0:4ad9373787e8 69 readRegs(REG_REV_ID, &rev, 1) ;
Rhyme 0:4ad9373787e8 70 return( rev ) ;
Rhyme 1:fc677d82d0f1 71 }
Rhyme 1:fc677d82d0f1 72
Rhyme 1:fc677d82d0f1 73 uint16_t MAX30101::getIntStatus(void)
Rhyme 1:fc677d82d0f1 74 {
Rhyme 1:fc677d82d0f1 75 uint8_t res[2] ;
Rhyme 1:fc677d82d0f1 76 uint16_t value ;
Rhyme 1:fc677d82d0f1 77 readRegs(REG_INT_MSB, res, 2) ;
Rhyme 1:fc677d82d0f1 78 value = (res[0] << 8) | res[1] ;
Rhyme 1:fc677d82d0f1 79 return( value ) ;
Rhyme 1:fc677d82d0f1 80 }
Rhyme 1:fc677d82d0f1 81
Rhyme 2:c465a8d44b9a 82 uint16_t MAX30101::getIntEnable(void)
Rhyme 2:c465a8d44b9a 83 {
Rhyme 2:c465a8d44b9a 84 uint8_t res[2] ;
Rhyme 2:c465a8d44b9a 85 uint16_t value ;
Rhyme 2:c465a8d44b9a 86 readRegs(REG_INT_ENB_MSB, res, 2) ;
Rhyme 2:c465a8d44b9a 87 value = (res[0] << 8) | res[1] ;
Rhyme 2:c465a8d44b9a 88 return( value ) ;
Rhyme 2:c465a8d44b9a 89 }
Rhyme 2:c465a8d44b9a 90
Rhyme 1:fc677d82d0f1 91 void MAX30101::setIntEnable(uint16_t mask)
Rhyme 1:fc677d82d0f1 92 {
Rhyme 1:fc677d82d0f1 93 uint8_t res[3] ;
Rhyme 2:c465a8d44b9a 94 res[0] = REG_INT_ENB_MSB ;
Rhyme 1:fc677d82d0f1 95 res[1] = (mask >> 8) & 0xFF ;
Rhyme 1:fc677d82d0f1 96 res[2] = (mask & 0xFF) ;
Rhyme 1:fc677d82d0f1 97 writeRegs(res, 3) ;
Rhyme 1:fc677d82d0f1 98 }
Rhyme 1:fc677d82d0f1 99
Rhyme 1:fc677d82d0f1 100 uint8_t MAX30101::getFIFO_WR_PTR(void)
Rhyme 1:fc677d82d0f1 101 {
Rhyme 1:fc677d82d0f1 102 uint8_t data ;
Rhyme 1:fc677d82d0f1 103 readRegs(REG_FIFO_WR_PTR, &data, 1) ;
Rhyme 1:fc677d82d0f1 104 return( data ) ;
Rhyme 1:fc677d82d0f1 105 }
Rhyme 1:fc677d82d0f1 106
Rhyme 1:fc677d82d0f1 107 void MAX30101::setFIFO_WR_PTR(uint8_t data)
Rhyme 1:fc677d82d0f1 108 {
Rhyme 1:fc677d82d0f1 109 uint8_t res[2] ;
Rhyme 1:fc677d82d0f1 110 res[0] = REG_FIFO_WR_PTR ;
Rhyme 1:fc677d82d0f1 111 res[1] = data ;
Rhyme 1:fc677d82d0f1 112 writeRegs(res, 2) ;
Rhyme 1:fc677d82d0f1 113 }
Rhyme 1:fc677d82d0f1 114
Rhyme 1:fc677d82d0f1 115 uint8_t MAX30101::getOVF_COUNTER(void)
Rhyme 1:fc677d82d0f1 116 {
Rhyme 1:fc677d82d0f1 117 uint8_t data ;
Rhyme 1:fc677d82d0f1 118 readRegs(REG_OVF_COUNTER, &data, 1) ;
Rhyme 1:fc677d82d0f1 119 return( data ) ;
Rhyme 1:fc677d82d0f1 120 }
Rhyme 1:fc677d82d0f1 121
Rhyme 1:fc677d82d0f1 122 void MAX30101::setOVF_COUNTER(uint8_t data)
Rhyme 1:fc677d82d0f1 123 {
Rhyme 1:fc677d82d0f1 124 uint8_t res[2] ;
Rhyme 1:fc677d82d0f1 125 res[0] = REG_OVF_COUNTER ;
Rhyme 1:fc677d82d0f1 126 res[1] = data ;
Rhyme 1:fc677d82d0f1 127 writeRegs(res, 2) ;
Rhyme 1:fc677d82d0f1 128 }
Rhyme 1:fc677d82d0f1 129
Rhyme 1:fc677d82d0f1 130 uint8_t MAX30101::getFIFO_RD_PTR(void)
Rhyme 1:fc677d82d0f1 131 {
Rhyme 1:fc677d82d0f1 132 uint8_t data ;
Rhyme 1:fc677d82d0f1 133 readRegs(REG_FIFO_RD_PTR, &data, 1) ;
Rhyme 1:fc677d82d0f1 134 return( data ) ;
Rhyme 1:fc677d82d0f1 135 }
Rhyme 1:fc677d82d0f1 136
Rhyme 1:fc677d82d0f1 137 void MAX30101::setFIFO_RD_PTR(uint8_t data)
Rhyme 1:fc677d82d0f1 138 {
Rhyme 1:fc677d82d0f1 139 uint8_t res[2] ;
Rhyme 1:fc677d82d0f1 140 res[0] = REG_FIFO_RD_PTR ;
Rhyme 1:fc677d82d0f1 141 res[1] = data ;
Rhyme 1:fc677d82d0f1 142 writeRegs(res, 2) ;
Rhyme 1:fc677d82d0f1 143 }
Rhyme 1:fc677d82d0f1 144
Rhyme 1:fc677d82d0f1 145 uint8_t MAX30101::getFIFO_DATA(void)
Rhyme 1:fc677d82d0f1 146 {
Rhyme 1:fc677d82d0f1 147 uint8_t data ;
Rhyme 1:fc677d82d0f1 148 readRegs(REG_FIFO_DATA, &data, 1) ;
Rhyme 1:fc677d82d0f1 149 return( data ) ;
Rhyme 1:fc677d82d0f1 150 }
Rhyme 1:fc677d82d0f1 151
Rhyme 1:fc677d82d0f1 152 void MAX30101::setFIFO_DATA(uint8_t data)
Rhyme 1:fc677d82d0f1 153 {
Rhyme 1:fc677d82d0f1 154 uint8_t res[2] ;
Rhyme 1:fc677d82d0f1 155 res[0] = REG_FIFO_DATA ;
Rhyme 1:fc677d82d0f1 156 res[1] = data ;
Rhyme 1:fc677d82d0f1 157 writeRegs(res, 2) ;
Rhyme 1:fc677d82d0f1 158 }
Rhyme 1:fc677d82d0f1 159
Rhyme 1:fc677d82d0f1 160 uint8_t MAX30101::getFIFO_CONFIG(void)
Rhyme 1:fc677d82d0f1 161 {
Rhyme 1:fc677d82d0f1 162 uint8_t data ;
Rhyme 1:fc677d82d0f1 163 readRegs(REG_FIFO_CONFIG, &data, 1) ;
Rhyme 1:fc677d82d0f1 164 return( data ) ;
Rhyme 1:fc677d82d0f1 165 }
Rhyme 1:fc677d82d0f1 166
Rhyme 1:fc677d82d0f1 167 void MAX30101::setFIFO_CONFIG(uint8_t data)
Rhyme 1:fc677d82d0f1 168 {
Rhyme 1:fc677d82d0f1 169 uint8_t res[2] ;
Rhyme 1:fc677d82d0f1 170 res[0] = REG_FIFO_CONFIG ;
Rhyme 1:fc677d82d0f1 171 res[1] = data ;
Rhyme 1:fc677d82d0f1 172 writeRegs(res, 2) ;
Rhyme 1:fc677d82d0f1 173 }
Rhyme 1:fc677d82d0f1 174
Rhyme 1:fc677d82d0f1 175 uint8_t MAX30101::getMODE_CONFIG(void)
Rhyme 1:fc677d82d0f1 176 {
Rhyme 1:fc677d82d0f1 177 uint8_t data ;
Rhyme 1:fc677d82d0f1 178 readRegs(REG_MODE_CONFIG, &data, 1) ;
Rhyme 1:fc677d82d0f1 179 return( data ) ;
Rhyme 1:fc677d82d0f1 180 }
Rhyme 1:fc677d82d0f1 181
Rhyme 1:fc677d82d0f1 182 void MAX30101::setMODE_CONFIG(uint8_t data)
Rhyme 1:fc677d82d0f1 183 {
Rhyme 1:fc677d82d0f1 184 uint8_t res[2] ;
Rhyme 1:fc677d82d0f1 185 res[0] = REG_MODE_CONFIG ;
Rhyme 1:fc677d82d0f1 186 res[1] = data ;
Rhyme 1:fc677d82d0f1 187 writeRegs(res, 2) ;
Rhyme 1:fc677d82d0f1 188 }
Rhyme 1:fc677d82d0f1 189
Rhyme 1:fc677d82d0f1 190 uint8_t MAX30101::getSPO2_CONFIG(void)
Rhyme 1:fc677d82d0f1 191 {
Rhyme 1:fc677d82d0f1 192 uint8_t data ;
Rhyme 1:fc677d82d0f1 193 readRegs(REG_SPO2_CONFIG, &data, 1) ;
Rhyme 1:fc677d82d0f1 194 return( data ) ;
Rhyme 1:fc677d82d0f1 195 }
Rhyme 1:fc677d82d0f1 196
Rhyme 1:fc677d82d0f1 197 void MAX30101::setSPO2_CONFIG(uint8_t data)
Rhyme 1:fc677d82d0f1 198 {
Rhyme 1:fc677d82d0f1 199 uint8_t res[2] ;
Rhyme 1:fc677d82d0f1 200 res[0] = REG_SPO2_CONFIG ;
Rhyme 1:fc677d82d0f1 201 res[1] = data ;
Rhyme 1:fc677d82d0f1 202 writeRegs(res, 2) ;
Rhyme 1:fc677d82d0f1 203 }
Rhyme 1:fc677d82d0f1 204
Rhyme 1:fc677d82d0f1 205 uint8_t MAX30101::getLED1_PA(void)
Rhyme 1:fc677d82d0f1 206 {
Rhyme 1:fc677d82d0f1 207 uint8_t data ;
Rhyme 1:fc677d82d0f1 208 readRegs(REG_LED1_PA, &data, 1) ;
Rhyme 1:fc677d82d0f1 209 return( data ) ;
Rhyme 1:fc677d82d0f1 210 }
Rhyme 1:fc677d82d0f1 211
Rhyme 1:fc677d82d0f1 212 void MAX30101::setLED1_PA(uint8_t data)
Rhyme 1:fc677d82d0f1 213 {
Rhyme 1:fc677d82d0f1 214 uint8_t res[2] ;
Rhyme 1:fc677d82d0f1 215 res[0] = REG_LED1_PA ;
Rhyme 1:fc677d82d0f1 216 res[1] = data ;
Rhyme 1:fc677d82d0f1 217 writeRegs(res, 2) ;
Rhyme 1:fc677d82d0f1 218 }
Rhyme 1:fc677d82d0f1 219
Rhyme 1:fc677d82d0f1 220 uint8_t MAX30101::getLED2_PA(void)
Rhyme 1:fc677d82d0f1 221 {
Rhyme 1:fc677d82d0f1 222 uint8_t data ;
Rhyme 1:fc677d82d0f1 223 readRegs(REG_LED2_PA, &data, 1) ;
Rhyme 1:fc677d82d0f1 224 return( data ) ;
Rhyme 1:fc677d82d0f1 225 }
Rhyme 1:fc677d82d0f1 226
Rhyme 1:fc677d82d0f1 227 void MAX30101::setLED2_PA(uint8_t data)
Rhyme 1:fc677d82d0f1 228 {
Rhyme 1:fc677d82d0f1 229 uint8_t res[2] ;
Rhyme 1:fc677d82d0f1 230 res[0] = REG_LED2_PA ;
Rhyme 1:fc677d82d0f1 231 res[1] = data ;
Rhyme 1:fc677d82d0f1 232 writeRegs(res, 2) ;
Rhyme 1:fc677d82d0f1 233 }
Rhyme 1:fc677d82d0f1 234
Rhyme 1:fc677d82d0f1 235 uint8_t MAX30101::getLED3_PA(void)
Rhyme 1:fc677d82d0f1 236 {
Rhyme 1:fc677d82d0f1 237 uint8_t data ;
Rhyme 1:fc677d82d0f1 238 readRegs(REG_LED3_PA, &data, 1) ;
Rhyme 1:fc677d82d0f1 239 return( data ) ;
Rhyme 1:fc677d82d0f1 240 }
Rhyme 1:fc677d82d0f1 241
Rhyme 1:fc677d82d0f1 242 void MAX30101::setLED3_PA(uint8_t data)
Rhyme 1:fc677d82d0f1 243 {
Rhyme 1:fc677d82d0f1 244 uint8_t res[2] ;
Rhyme 1:fc677d82d0f1 245 res[0] = REG_LED3_PA ;
Rhyme 1:fc677d82d0f1 246 res[1] = data ;
Rhyme 1:fc677d82d0f1 247 writeRegs(res, 2) ;
Rhyme 1:fc677d82d0f1 248 }
Rhyme 1:fc677d82d0f1 249
Rhyme 1:fc677d82d0f1 250 uint8_t MAX30101::getPILOT_PA(void)
Rhyme 1:fc677d82d0f1 251 {
Rhyme 1:fc677d82d0f1 252 uint8_t data ;
Rhyme 1:fc677d82d0f1 253 readRegs(REG_PILOT_PA, &data, 1) ;
Rhyme 1:fc677d82d0f1 254 return( data ) ;
Rhyme 1:fc677d82d0f1 255 }
Rhyme 1:fc677d82d0f1 256
Rhyme 1:fc677d82d0f1 257 void MAX30101::setPILOT_PA(uint8_t data)
Rhyme 1:fc677d82d0f1 258 {
Rhyme 1:fc677d82d0f1 259 uint8_t res[2] ;
Rhyme 1:fc677d82d0f1 260 res[0] = REG_PILOT_PA ;
Rhyme 1:fc677d82d0f1 261 res[1] = data ;
Rhyme 1:fc677d82d0f1 262 writeRegs(res, 2) ;
Rhyme 1:fc677d82d0f1 263 }
Rhyme 1:fc677d82d0f1 264
Rhyme 1:fc677d82d0f1 265 uint16_t MAX30101::getSLOT(void)
Rhyme 1:fc677d82d0f1 266 {
Rhyme 1:fc677d82d0f1 267 uint8_t res[2] ;
Rhyme 1:fc677d82d0f1 268 uint16_t data ;
Rhyme 1:fc677d82d0f1 269 readRegs(REG_SLOT_MSB, res, 2) ;
Rhyme 1:fc677d82d0f1 270 data = (res[0] << 8) | res[1] ;
Rhyme 1:fc677d82d0f1 271 return( data ) ;
Rhyme 1:fc677d82d0f1 272 }
Rhyme 1:fc677d82d0f1 273
Rhyme 1:fc677d82d0f1 274 void MAX30101::setSLOT(uint16_t data)
Rhyme 1:fc677d82d0f1 275 {
Rhyme 1:fc677d82d0f1 276 uint8_t res[3] ;
Rhyme 1:fc677d82d0f1 277 res[0] = REG_SLOT_MSB ;
Rhyme 1:fc677d82d0f1 278 res[1] = (data >> 8) & 0xFF ;
Rhyme 1:fc677d82d0f1 279 res[2] = data & 0xFF ;
Rhyme 1:fc677d82d0f1 280 writeRegs(res, 3) ;
Rhyme 1:fc677d82d0f1 281 }
Rhyme 1:fc677d82d0f1 282
Rhyme 1:fc677d82d0f1 283 uint8_t MAX30101::getTEMP_INT(void)
Rhyme 1:fc677d82d0f1 284 {
Rhyme 1:fc677d82d0f1 285 uint8_t data ;
Rhyme 1:fc677d82d0f1 286 readRegs(REG_TEMP_INT, &data, 1) ;
Rhyme 1:fc677d82d0f1 287 return( data ) ;
Rhyme 1:fc677d82d0f1 288 }
Rhyme 1:fc677d82d0f1 289
Rhyme 2:c465a8d44b9a 290 uint8_t MAX30101::getTEMP_FRAC(void)
Rhyme 1:fc677d82d0f1 291 {
Rhyme 1:fc677d82d0f1 292 uint8_t data ;
Rhyme 1:fc677d82d0f1 293 readRegs(REG_TEMP_FRAC, &data, 1) ;
Rhyme 1:fc677d82d0f1 294 return( data ) ;
Rhyme 1:fc677d82d0f1 295 }
Rhyme 1:fc677d82d0f1 296
Rhyme 1:fc677d82d0f1 297 uint8_t MAX30101::getTEMP_EN(void)
Rhyme 1:fc677d82d0f1 298 {
Rhyme 1:fc677d82d0f1 299 uint8_t data ;
Rhyme 1:fc677d82d0f1 300 readRegs(REG_TEMP_EN, &data, 1) ;
Rhyme 1:fc677d82d0f1 301 return( data ) ;
Rhyme 1:fc677d82d0f1 302 }
Rhyme 1:fc677d82d0f1 303
Rhyme 2:c465a8d44b9a 304 float MAX30101::getTEMP(void)
Rhyme 2:c465a8d44b9a 305 {
Rhyme 2:c465a8d44b9a 306 float temp ;
Rhyme 2:c465a8d44b9a 307 int temp_int, temp_frac ;
Rhyme 2:c465a8d44b9a 308 setTEMP_EN() ;
Rhyme 2:c465a8d44b9a 309 while(getTEMP_EN() == 0x01) { }
Rhyme 2:c465a8d44b9a 310 temp_int = getTEMP_INT() ;
Rhyme 2:c465a8d44b9a 311 temp_frac = getTEMP_FRAC() ;
Rhyme 2:c465a8d44b9a 312 temp = ((float)temp_int)+(((float)temp_frac)/16.0) ;
Rhyme 2:c465a8d44b9a 313 return( temp ) ;
Rhyme 2:c465a8d44b9a 314 }
Rhyme 2:c465a8d44b9a 315
Rhyme 1:fc677d82d0f1 316 uint8_t MAX30101::getPROX_INT_THR(void)
Rhyme 1:fc677d82d0f1 317 {
Rhyme 1:fc677d82d0f1 318 uint8_t data ;
Rhyme 1:fc677d82d0f1 319 readRegs(REG_PROX_INT_THR, &data, 1) ;
Rhyme 1:fc677d82d0f1 320 return( data ) ;
Rhyme 1:fc677d82d0f1 321 }
Rhyme 1:fc677d82d0f1 322
Rhyme 1:fc677d82d0f1 323 void MAX30101::setPROX_INT_THR(uint8_t data)
Rhyme 1:fc677d82d0f1 324 {
Rhyme 1:fc677d82d0f1 325 uint8_t res[2] ;
Rhyme 1:fc677d82d0f1 326 res[0] = REG_PROX_INT_THR ;
Rhyme 1:fc677d82d0f1 327 res[1] = data ;
Rhyme 1:fc677d82d0f1 328 writeRegs(res, 2) ;
Rhyme 1:fc677d82d0f1 329 }
Rhyme 1:fc677d82d0f1 330
Rhyme 2:c465a8d44b9a 331 void MAX30101::clearFIFO(void)
Rhyme 2:c465a8d44b9a 332 {
Rhyme 2:c465a8d44b9a 333 uint8_t res[5] ;
Rhyme 2:c465a8d44b9a 334 res[0] = REG_FIFO_WR_PTR ;
Rhyme 2:c465a8d44b9a 335 res[1] = 0x00 ; /* FIFO_WR_PTR */
Rhyme 2:c465a8d44b9a 336 res[2] = 0x00 ; /* OVF_COUNTER */
Rhyme 2:c465a8d44b9a 337 res[3] = 0x00 ; /* FIFO_RD_PTR */
Rhyme 2:c465a8d44b9a 338 res[4] = 0x00 ; /* FIFO_DATA (do we need to clear this?) */
Rhyme 2:c465a8d44b9a 339 writeRegs(res, 5) ;
Rhyme 2:c465a8d44b9a 340 }
Rhyme 2:c465a8d44b9a 341
Rhyme 2:c465a8d44b9a 342 /**
Rhyme 2:c465a8d44b9a 343 * readFIFO(void)
Rhyme 2:c465a8d44b9a 344 * FIFO data is always a 3-bytes data
Rhyme 2:c465a8d44b9a 345 * byte1[1:0] : FIFO_DATA[17]-FIFO_DATA[16]
Rhyme 2:c465a8d44b9a 346 * byte2[7:0] : FIFO_DATA[15]-FIFO_DATA[8]
Rhyme 2:c465a8d44b9a 347 * byte3[7:0] : FIFO_DATA[7]-FIFO_DATA[0]
Rhyme 2:c465a8d44b9a 348 * The data is left aligned, so FIFO_DATA[17]
Rhyme 2:c465a8d44b9a 349 * is always MSB, although the data length
Rhyme 2:c465a8d44b9a 350 * can be 18-bit ~ 15-bit
Rhyme 2:c465a8d44b9a 351 */
Rhyme 2:c465a8d44b9a 352 uint32_t MAX30101::readFIFO(void)
Rhyme 2:c465a8d44b9a 353 {
Rhyme 2:c465a8d44b9a 354 uint32_t data = 0 ;
Rhyme 2:c465a8d44b9a 355 uint8_t res[3] ;
Rhyme 2:c465a8d44b9a 356 readRegs(REG_FIFO_DATA, res, 3) ;
Rhyme 2:c465a8d44b9a 357 data =
Rhyme 2:c465a8d44b9a 358 ((res[0] & 0x03)<<16)
Rhyme 2:c465a8d44b9a 359 | (res[1] << 8)
Rhyme 2:c465a8d44b9a 360 | res[2] ;
Rhyme 2:c465a8d44b9a 361 return( data ) ;
Rhyme 2:c465a8d44b9a 362 }
Rhyme 2:c465a8d44b9a 363
Rhyme 2:c465a8d44b9a 364 void MAX30101::reset(void)
Rhyme 2:c465a8d44b9a 365 {
Rhyme 2:c465a8d44b9a 366 uint8_t res[2] ;
Rhyme 2:c465a8d44b9a 367 res[0] = REG_MODE_CONFIG ;
Rhyme 2:c465a8d44b9a 368 res[1] = 0x40 ; /* reset */
Rhyme 2:c465a8d44b9a 369 writeRegs(res, 2) ;
Rhyme 2:c465a8d44b9a 370 }