Library for MAX30101 SpO2 and heart rate sensor
Dependents: HeartRate HeartRate proj final_project_ee119 ... more
MAX30101.cpp@5:be1dde31fe49, 2017-05-05 (annotated)
- Committer:
- j3
- Date:
- Fri May 05 00:25:21 2017 +0000
- Revision:
- 5:be1dde31fe49
- Parent:
- 3:a2effad05c99
- Child:
- 7:ce122c27358e
added useful enums
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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j3 | 0:2d0c91de9279 | 1 | /******************************************************************************* |
j3 | 0:2d0c91de9279 | 2 | * Copyright (C) 2017 Maxim Integrated Products, Inc., All Rights Reserved. |
j3 | 0:2d0c91de9279 | 3 | * |
j3 | 0:2d0c91de9279 | 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
j3 | 0:2d0c91de9279 | 5 | * copy of this software and associated documentation files (the "Software"), |
j3 | 0:2d0c91de9279 | 6 | * to deal in the Software without restriction, including without limitation |
j3 | 0:2d0c91de9279 | 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
j3 | 0:2d0c91de9279 | 8 | * and/or sell copies of the Software, and to permit persons to whom the |
j3 | 0:2d0c91de9279 | 9 | * Software is furnished to do so, subject to the following conditions: |
j3 | 0:2d0c91de9279 | 10 | * |
j3 | 0:2d0c91de9279 | 11 | * The above copyright notice and this permission notice shall be included |
j3 | 0:2d0c91de9279 | 12 | * in all copies or substantial portions of the Software. |
j3 | 0:2d0c91de9279 | 13 | * |
j3 | 0:2d0c91de9279 | 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
j3 | 0:2d0c91de9279 | 15 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
j3 | 0:2d0c91de9279 | 16 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
j3 | 0:2d0c91de9279 | 17 | * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES |
j3 | 0:2d0c91de9279 | 18 | * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
j3 | 0:2d0c91de9279 | 19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
j3 | 0:2d0c91de9279 | 20 | * OTHER DEALINGS IN THE SOFTWARE. |
j3 | 0:2d0c91de9279 | 21 | * |
j3 | 0:2d0c91de9279 | 22 | * Except as contained in this notice, the name of Maxim Integrated |
j3 | 0:2d0c91de9279 | 23 | * Products, Inc. shall not be used except as stated in the Maxim Integrated |
j3 | 0:2d0c91de9279 | 24 | * Products, Inc. Branding Policy. |
j3 | 0:2d0c91de9279 | 25 | * |
j3 | 0:2d0c91de9279 | 26 | * The mere transfer of this software does not imply any licenses |
j3 | 0:2d0c91de9279 | 27 | * of trade secrets, proprietary technology, copyrights, patents, |
j3 | 0:2d0c91de9279 | 28 | * trademarks, maskwork rights, or any other form of intellectual |
j3 | 0:2d0c91de9279 | 29 | * property whatsoever. Maxim Integrated Products, Inc. retains all |
j3 | 0:2d0c91de9279 | 30 | * ownership rights. |
j3 | 0:2d0c91de9279 | 31 | ******************************************************************************* |
j3 | 0:2d0c91de9279 | 32 | */ |
j3 | 0:2d0c91de9279 | 33 | |
j3 | 0:2d0c91de9279 | 34 | |
j3 | 0:2d0c91de9279 | 35 | #include "MAX30101.h" |
j3 | 0:2d0c91de9279 | 36 | |
j3 | 0:2d0c91de9279 | 37 | |
j3 | 0:2d0c91de9279 | 38 | //***************************************************************************** |
j3 | 0:2d0c91de9279 | 39 | MAX30101::MAX30101(PinName sda, PinName scl): |
j3 | 0:2d0c91de9279 | 40 | m_i2cBus(sda, scl) |
j3 | 0:2d0c91de9279 | 41 | { |
j3 | 0:2d0c91de9279 | 42 | //empty block |
j3 | 0:2d0c91de9279 | 43 | } |
j3 | 0:2d0c91de9279 | 44 | |
j3 | 0:2d0c91de9279 | 45 | |
j3 | 0:2d0c91de9279 | 46 | //***************************************************************************** |
j3 | 0:2d0c91de9279 | 47 | MAX30101::MAX30101(I2C &i2c): |
j3 | 0:2d0c91de9279 | 48 | m_i2cBus(i2c) |
j3 | 0:2d0c91de9279 | 49 | { |
j3 | 0:2d0c91de9279 | 50 | //empty block |
j3 | 0:2d0c91de9279 | 51 | } |
j3 | 0:2d0c91de9279 | 52 | |
j3 | 0:2d0c91de9279 | 53 | |
j3 | 0:2d0c91de9279 | 54 | //***************************************************************************** |
j3 | 0:2d0c91de9279 | 55 | MAX30101::~MAX30101() |
j3 | 0:2d0c91de9279 | 56 | { |
j3 | 0:2d0c91de9279 | 57 | //empty block |
j3 | 0:2d0c91de9279 | 58 | } |
j3 | 0:2d0c91de9279 | 59 | |
j3 | 0:2d0c91de9279 | 60 | |
j3 | 0:2d0c91de9279 | 61 | //***************************************************************************** |
j3 | 0:2d0c91de9279 | 62 | int32_t MAX30101::enableInterrupts(const InterruptBitField_u data) |
j3 | 0:2d0c91de9279 | 63 | { |
j3 | 0:2d0c91de9279 | 64 | char cmdData[3] = {InterruptEnable1, (data.all & 0xF0), (data.all & 0x02)}; |
j3 | 0:2d0c91de9279 | 65 | |
j3 | 0:2d0c91de9279 | 66 | return m_i2cBus.write(I2C_W_ADRS, cmdData, 3); |
j3 | 0:2d0c91de9279 | 67 | } |
j3 | 0:2d0c91de9279 | 68 | |
j3 | 0:2d0c91de9279 | 69 | |
j3 | 0:2d0c91de9279 | 70 | //***************************************************************************** |
j3 | 0:2d0c91de9279 | 71 | int32_t MAX30101::getInterruptStatus(InterruptBitField_u &data) |
j3 | 0:2d0c91de9279 | 72 | { |
j3 | 0:2d0c91de9279 | 73 | char local_data[3]; |
j3 | 0:2d0c91de9279 | 74 | local_data[0] = InterruptStatus1; |
j3 | 0:2d0c91de9279 | 75 | |
j3 | 0:2d0c91de9279 | 76 | int32_t result = m_i2cBus.write(I2C_W_ADRS, local_data, 1); |
j3 | 0:2d0c91de9279 | 77 | if(result == 0) |
j3 | 0:2d0c91de9279 | 78 | { |
j3 | 0:2d0c91de9279 | 79 | result = m_i2cBus.read(I2C_R_ADRS, (local_data + 1), 2); |
j3 | 0:2d0c91de9279 | 80 | if(result == 0) |
j3 | 0:2d0c91de9279 | 81 | { |
j3 | 0:2d0c91de9279 | 82 | data.all = local_data[1] + local_data[2]; |
j3 | 0:2d0c91de9279 | 83 | } |
j3 | 0:2d0c91de9279 | 84 | } |
j3 | 0:2d0c91de9279 | 85 | |
j3 | 0:2d0c91de9279 | 86 | return result; |
j3 | 0:2d0c91de9279 | 87 | } |
j3 | 0:2d0c91de9279 | 88 | |
j3 | 0:2d0c91de9279 | 89 | |
j3 | 0:2d0c91de9279 | 90 | //***************************************************************************** |
j3 | 1:9e2a3b4a24c7 | 91 | int32_t MAX30101::setFIFOConfiguration(const FIFO_Configuration_u config) |
j3 | 1:9e2a3b4a24c7 | 92 | { |
j3 | 2:0db1f3bec727 | 93 | return writeRegister(FIFO_Configuration, config.all); |
j3 | 1:9e2a3b4a24c7 | 94 | } |
j3 | 1:9e2a3b4a24c7 | 95 | |
j3 | 1:9e2a3b4a24c7 | 96 | |
j3 | 1:9e2a3b4a24c7 | 97 | //***************************************************************************** |
j3 | 1:9e2a3b4a24c7 | 98 | int32_t MAX30101::getFIFOConfiguration(FIFO_Configuration_u &config) |
j3 | 1:9e2a3b4a24c7 | 99 | { |
j3 | 2:0db1f3bec727 | 100 | return readRegister(FIFO_Configuration, config.all); |
j3 | 1:9e2a3b4a24c7 | 101 | } |
j3 | 1:9e2a3b4a24c7 | 102 | |
j3 | 1:9e2a3b4a24c7 | 103 | |
j3 | 1:9e2a3b4a24c7 | 104 | //***************************************************************************** |
j3 | 1:9e2a3b4a24c7 | 105 | int32_t MAX30101::setModeConfiguration(const ModeConfiguration_u config) |
j3 | 1:9e2a3b4a24c7 | 106 | { |
j3 | 2:0db1f3bec727 | 107 | return writeRegister(ModeConfiguration, (config.all & 0xC7)); |
j3 | 1:9e2a3b4a24c7 | 108 | } |
j3 | 1:9e2a3b4a24c7 | 109 | |
j3 | 1:9e2a3b4a24c7 | 110 | |
j3 | 1:9e2a3b4a24c7 | 111 | //***************************************************************************** |
j3 | 1:9e2a3b4a24c7 | 112 | int32_t MAX30101::getModeConfiguration(ModeConfiguration_u &config) |
j3 | 1:9e2a3b4a24c7 | 113 | { |
j3 | 2:0db1f3bec727 | 114 | return readRegister(ModeConfiguration, config.all); |
j3 | 1:9e2a3b4a24c7 | 115 | } |
j3 | 1:9e2a3b4a24c7 | 116 | |
j3 | 1:9e2a3b4a24c7 | 117 | |
j3 | 1:9e2a3b4a24c7 | 118 | //***************************************************************************** |
j3 | 1:9e2a3b4a24c7 | 119 | int32_t MAX30101::setSpO2Configuration(const SpO2Configuration_u config) |
j3 | 1:9e2a3b4a24c7 | 120 | { |
j3 | 2:0db1f3bec727 | 121 | return writeRegister(SpO2Configuration, (config.all & 0x7F)); |
j3 | 1:9e2a3b4a24c7 | 122 | } |
j3 | 1:9e2a3b4a24c7 | 123 | |
j3 | 1:9e2a3b4a24c7 | 124 | |
j3 | 1:9e2a3b4a24c7 | 125 | //***************************************************************************** |
j3 | 1:9e2a3b4a24c7 | 126 | int32_t MAX30101::getSpO2Configuration(SpO2Configuration_u &config) |
j3 | 1:9e2a3b4a24c7 | 127 | { |
j3 | 2:0db1f3bec727 | 128 | return readRegister(SpO2Configuration, config.all); |
j3 | 1:9e2a3b4a24c7 | 129 | } |
j3 | 1:9e2a3b4a24c7 | 130 | |
j3 | 1:9e2a3b4a24c7 | 131 | |
j3 | 1:9e2a3b4a24c7 | 132 | //***************************************************************************** |
j3 | 1:9e2a3b4a24c7 | 133 | int32_t MAX30101::setLEDPulseAmplitude(Registers_e reg, const uint8_t amp) |
j3 | 1:9e2a3b4a24c7 | 134 | { |
j3 | 2:0db1f3bec727 | 135 | return writeRegister(reg, amp); |
j3 | 1:9e2a3b4a24c7 | 136 | } |
j3 | 1:9e2a3b4a24c7 | 137 | |
j3 | 1:9e2a3b4a24c7 | 138 | |
j3 | 1:9e2a3b4a24c7 | 139 | //***************************************************************************** |
j3 | 1:9e2a3b4a24c7 | 140 | int32_t MAX30101::getLEDPulseAmplitude(Registers_e reg, uint8_t &) |
j3 | 1:9e2a3b4a24c7 | 141 | { |
j3 | 2:0db1f3bec727 | 142 | return readRegister(reg, amp); |
j3 | 1:9e2a3b4a24c7 | 143 | } |
j3 | 1:9e2a3b4a24c7 | 144 | |
j3 | 1:9e2a3b4a24c7 | 145 | |
j3 | 1:9e2a3b4a24c7 | 146 | //***************************************************************************** |
j3 | 1:9e2a3b4a24c7 | 147 | int32_t MAX30101::setMultiLEDModeControl(Registers_e reg, const ModeControlReg_u data) |
j3 | 1:9e2a3b4a24c7 | 148 | { |
j3 | 2:0db1f3bec727 | 149 | return writeRegister(reg, data.all); |
j3 | 1:9e2a3b4a24c7 | 150 | } |
j3 | 1:9e2a3b4a24c7 | 151 | |
j3 | 1:9e2a3b4a24c7 | 152 | |
j3 | 1:9e2a3b4a24c7 | 153 | //***************************************************************************** |
j3 | 1:9e2a3b4a24c7 | 154 | int32_t MAX30101::getMultiLEDModeControl(Registers_e reg, ModeControlReg_u &data) |
j3 | 1:9e2a3b4a24c7 | 155 | { |
j3 | 2:0db1f3bec727 | 156 | return readRegister(reg, data.all); |
j3 | 1:9e2a3b4a24c7 | 157 | } |
j3 | 1:9e2a3b4a24c7 | 158 | |
j3 | 1:9e2a3b4a24c7 | 159 | |
j3 | 1:9e2a3b4a24c7 | 160 | //***************************************************************************** |
j3 | 1:9e2a3b4a24c7 | 161 | int32_t MAX30101::getDieTemperature(uint16_t &data) |
j3 | 1:9e2a3b4a24c7 | 162 | { |
j3 | 2:0db1f3bec727 | 163 | int32_t result = -1; |
j3 | 2:0db1f3bec727 | 164 | |
j3 | 2:0db1f3bec727 | 165 | //Die temp conversion time is 30ms |
j3 | 2:0db1f3bec727 | 166 | //ATTEMPTS > than 30ms at 100KHz SCL for getInterruptStatus call |
j3 | 2:0db1f3bec727 | 167 | const uint32_t ATTEMPTS = 100; |
j3 | 2:0db1f3bec727 | 168 | uint32_t num_reads = 0; |
j3 | 2:0db1f3bec727 | 169 | |
j3 | 2:0db1f3bec727 | 170 | //local i2c transaction buffer |
j3 | 2:0db1f3bec727 | 171 | char local_data[2]; |
j3 | 2:0db1f3bec727 | 172 | local_data[0] = DieTempConfig; |
j3 | 2:0db1f3bec727 | 173 | local_data[1] = 1; |
j3 | 2:0db1f3bec727 | 174 | |
j3 | 2:0db1f3bec727 | 175 | //initiate die temp conversion |
j3 | 2:0db1f3bec727 | 176 | result = m_i2cBus.write(I2C_W_ADRS, local_data, 2, true); |
j3 | 2:0db1f3bec727 | 177 | if(result == 0) |
j3 | 2:0db1f3bec727 | 178 | { |
j3 | 2:0db1f3bec727 | 179 | //object for holding status registers data |
j3 | 2:0db1f3bec727 | 180 | InterruptBitField_u status; |
j3 | 2:0db1f3bec727 | 181 | status.all = 0; |
j3 | 2:0db1f3bec727 | 182 | |
j3 | 2:0db1f3bec727 | 183 | //poll status registers until temp ready, or read fails |
j3 | 2:0db1f3bec727 | 184 | do |
j3 | 2:0db1f3bec727 | 185 | { |
j3 | 2:0db1f3bec727 | 186 | result = getInterruptStatus(status); |
j3 | 2:0db1f3bec727 | 187 | num_reads++; |
j3 | 2:0db1f3bec727 | 188 | } |
j3 | 2:0db1f3bec727 | 189 | while(!status.bits.die_temp && (result == 0) && (num_reads < ATTEMPTS)); |
j3 | 2:0db1f3bec727 | 190 | |
j3 | 2:0db1f3bec727 | 191 | if(status.bits.die_temp) |
j3 | 2:0db1f3bec727 | 192 | { |
j3 | 2:0db1f3bec727 | 193 | //set pointer to temperature integer register |
j3 | 2:0db1f3bec727 | 194 | local_data[0] = DieTempInt; |
j3 | 2:0db1f3bec727 | 195 | result = m_i2cBus.write(I2C_W_ADRS, local_data, 1, true); |
j3 | 2:0db1f3bec727 | 196 | if(result == 0) |
j3 | 2:0db1f3bec727 | 197 | { |
j3 | 2:0db1f3bec727 | 198 | //read two bytes |
j3 | 2:0db1f3bec727 | 199 | result = m_i2cBus.read(I2C_R_ADRS, local_data, 2); |
j3 | 2:0db1f3bec727 | 200 | if(result == 0) |
j3 | 2:0db1f3bec727 | 201 | { |
j3 | 2:0db1f3bec727 | 202 | //stuff data |
j3 | 2:0db1f3bec727 | 203 | data = ( (local_data[0] << 8) | (local_data[1] << 4) ); |
j3 | 2:0db1f3bec727 | 204 | data = (data >> 4); |
j3 | 2:0db1f3bec727 | 205 | } |
j3 | 2:0db1f3bec727 | 206 | } |
j3 | 2:0db1f3bec727 | 207 | } |
j3 | 2:0db1f3bec727 | 208 | else |
j3 | 2:0db1f3bec727 | 209 | { |
j3 | 2:0db1f3bec727 | 210 | //if result equals 0 because num_reads exceeded ATTEMPTS, |
j3 | 2:0db1f3bec727 | 211 | //change result to -1. Otherwise keep result's error code. |
j3 | 2:0db1f3bec727 | 212 | result = (result == 0) ? -1 : result; |
j3 | 2:0db1f3bec727 | 213 | } |
j3 | 2:0db1f3bec727 | 214 | } |
j3 | 2:0db1f3bec727 | 215 | return result; |
j3 | 1:9e2a3b4a24c7 | 216 | } |
j3 | 1:9e2a3b4a24c7 | 217 | |
j3 | 1:9e2a3b4a24c7 | 218 | |
j3 | 1:9e2a3b4a24c7 | 219 | //***************************************************************************** |
j3 | 1:9e2a3b4a24c7 | 220 | int32_t MAX30101::getDieTemperatureC(float &data) |
j3 | 1:9e2a3b4a24c7 | 221 | { |
j3 | 2:0db1f3bec727 | 222 | uint16_t raw_temp; |
j3 | 2:0db1f3bec727 | 223 | |
j3 | 2:0db1f3bec727 | 224 | int32_t result = getDieTemperature(raw_temp); |
j3 | 2:0db1f3bec727 | 225 | if(result == 0) |
j3 | 2:0db1f3bec727 | 226 | { |
j3 | 2:0db1f3bec727 | 227 | if(raw_temp & 0x0800) |
j3 | 2:0db1f3bec727 | 228 | { |
j3 | 2:0db1f3bec727 | 229 | data = ((0xFFFFF000 | raw_temp)/16.0F); |
j3 | 2:0db1f3bec727 | 230 | } |
j3 | 2:0db1f3bec727 | 231 | else |
j3 | 2:0db1f3bec727 | 232 | { |
j3 | 2:0db1f3bec727 | 233 | data = (raw_temp/16.0F); |
j3 | 2:0db1f3bec727 | 234 | } |
j3 | 2:0db1f3bec727 | 235 | } |
j3 | 2:0db1f3bec727 | 236 | |
j3 | 2:0db1f3bec727 | 237 | return result; |
j3 | 1:9e2a3b4a24c7 | 238 | } |
j3 | 1:9e2a3b4a24c7 | 239 | |
j3 | 1:9e2a3b4a24c7 | 240 | |
j3 | 1:9e2a3b4a24c7 | 241 | //***************************************************************************** |
j3 | 1:9e2a3b4a24c7 | 242 | float MAX30101::celsius2fahrenheit(float c) |
j3 | 1:9e2a3b4a24c7 | 243 | { |
j3 | 2:0db1f3bec727 | 244 | return ((1.8F * c) + 32.0F); |
j3 | 1:9e2a3b4a24c7 | 245 | } |
j3 | 1:9e2a3b4a24c7 | 246 | |
j3 | 1:9e2a3b4a24c7 | 247 | |
j3 | 1:9e2a3b4a24c7 | 248 | //***************************************************************************** |
j3 | 1:9e2a3b4a24c7 | 249 | int32_t MAX30101::setProxIntThreshold(const uint8_t data) |
j3 | 1:9e2a3b4a24c7 | 250 | { |
j3 | 2:0db1f3bec727 | 251 | return writeRegister(ProxIntThreshold, data); |
j3 | 1:9e2a3b4a24c7 | 252 | } |
j3 | 1:9e2a3b4a24c7 | 253 | |
j3 | 1:9e2a3b4a24c7 | 254 | |
j3 | 1:9e2a3b4a24c7 | 255 | //***************************************************************************** |
j3 | 1:9e2a3b4a24c7 | 256 | int32_t MAX30101::getProxIntThreshold(uint8_t &data) |
j3 | 1:9e2a3b4a24c7 | 257 | { |
j3 | 2:0db1f3bec727 | 258 | return readRegister(ProxIntThreshold, data); |
j3 | 1:9e2a3b4a24c7 | 259 | } |
j3 | 1:9e2a3b4a24c7 | 260 | |
j3 | 1:9e2a3b4a24c7 | 261 | |
j3 | 3:a2effad05c99 | 262 | //***************************************************************************** |
j3 | 5:be1dde31fe49 | 263 | int32_t MAX30101::readFIFO(LedChannels_e numLeds, uint8_t *data, uint16_t &readBytes) |
j3 | 3:a2effad05c99 | 264 | { |
j3 | 3:a2effad05c99 | 265 | int32_t result = -1; |
j3 | 3:a2effad05c99 | 266 | |
j3 | 3:a2effad05c99 | 267 | readBytes = 0; |
j3 | 3:a2effad05c99 | 268 | |
j3 | 5:be1dde31fe49 | 269 | //Get write pointer |
j3 | 5:be1dde31fe49 | 270 | result = readRegister(FIFO_WritePointer, m_fifoWritePtr); |
j3 | 5:be1dde31fe49 | 271 | if(result == 0) |
j3 | 3:a2effad05c99 | 272 | { |
j3 | 5:be1dde31fe49 | 273 | //Get read pointer |
j3 | 5:be1dde31fe49 | 274 | result = readRegister(FIFO_ReadPointer, m_fifoReadPtr); |
j3 | 3:a2effad05c99 | 275 | if(result == 0) |
j3 | 3:a2effad05c99 | 276 | { |
j3 | 5:be1dde31fe49 | 277 | //Calculate num bytes to read |
j3 | 5:be1dde31fe49 | 278 | if(m_fifoWritePtr > m_fifoReadPtr) |
j3 | 5:be1dde31fe49 | 279 | { |
j3 | 5:be1dde31fe49 | 280 | m_fifoNumBytes = ((m_fifoWritePtr - m_fifoReadPtr) * |
j3 | 5:be1dde31fe49 | 281 | (BYTES_PER_CH * numLeds)); |
j3 | 5:be1dde31fe49 | 282 | } |
j3 | 5:be1dde31fe49 | 283 | else |
j3 | 5:be1dde31fe49 | 284 | { |
j3 | 5:be1dde31fe49 | 285 | m_fifoNumBytes = (((32 - m_fifoReadPtr) + m_fifoWritePtr) * |
j3 | 5:be1dde31fe49 | 286 | (BYTES_PER_CH * numLeds)); |
j3 | 5:be1dde31fe49 | 287 | } |
j3 | 5:be1dde31fe49 | 288 | |
j3 | 5:be1dde31fe49 | 289 | //temporary buffer for data |
j3 | 5:be1dde31fe49 | 290 | char local_data[m_fifoNumBytes]; |
j3 | 5:be1dde31fe49 | 291 | local_data[0] = FIFO_DataRegister; |
j3 | 5:be1dde31fe49 | 292 | |
j3 | 5:be1dde31fe49 | 293 | //Set fifo data ptr |
j3 | 5:be1dde31fe49 | 294 | result = m_i2cBus.write(I2C_W_ADRS, local_data, 1, true); |
j3 | 3:a2effad05c99 | 295 | if(result == 0) |
j3 | 3:a2effad05c99 | 296 | { |
j3 | 5:be1dde31fe49 | 297 | //read fifo |
j3 | 5:be1dde31fe49 | 298 | result = m_i2cBus.read(I2C_R_ADRS, local_data, m_fifoNumBytes); |
j3 | 3:a2effad05c99 | 299 | if(result == 0) |
j3 | 3:a2effad05c99 | 300 | { |
j3 | 5:be1dde31fe49 | 301 | //move data to user buffer |
j3 | 5:be1dde31fe49 | 302 | memcpy(data, local_data, m_fifoNumBytes); |
j3 | 5:be1dde31fe49 | 303 | readBytes = m_fifoNumBytes; |
j3 | 3:a2effad05c99 | 304 | } |
j3 | 3:a2effad05c99 | 305 | } |
j3 | 3:a2effad05c99 | 306 | } |
j3 | 3:a2effad05c99 | 307 | } |
j3 | 3:a2effad05c99 | 308 | |
j3 | 3:a2effad05c99 | 309 | return result; |
j3 | 3:a2effad05c99 | 310 | } |
j3 | 3:a2effad05c99 | 311 | |
j3 | 3:a2effad05c99 | 312 | |
j3 | 1:9e2a3b4a24c7 | 313 | //***************************************************************************** |
j3 | 0:2d0c91de9279 | 314 | int32_t MAX30101::writeRegister(Registers_e reg, uint8_t value) |
j3 | 0:2d0c91de9279 | 315 | { |
j3 | 0:2d0c91de9279 | 316 | char local_data[2] = {reg, value}; |
j3 | 0:2d0c91de9279 | 317 | |
j3 | 0:2d0c91de9279 | 318 | return m_i2cBus.write(I2C_W_ADRS, local_data, 2); |
j3 | 0:2d0c91de9279 | 319 | } |
j3 | 0:2d0c91de9279 | 320 | |
j3 | 0:2d0c91de9279 | 321 | |
j3 | 0:2d0c91de9279 | 322 | //***************************************************************************** |
j3 | 0:2d0c91de9279 | 323 | int32_t MAX30101::readRegister(Registers_e reg, uint8_t &value) |
j3 | 0:2d0c91de9279 | 324 | { |
j3 | 0:2d0c91de9279 | 325 | int32_t result; |
j3 | 0:2d0c91de9279 | 326 | |
j3 | 0:2d0c91de9279 | 327 | char local_data[2]; |
j3 | 0:2d0c91de9279 | 328 | local_data[0] = reg; |
j3 | 0:2d0c91de9279 | 329 | |
j3 | 0:2d0c91de9279 | 330 | result = m_i2cBus.write(I2C_W_ADRS, local_data, 1); |
j3 | 0:2d0c91de9279 | 331 | if(result == 0) |
j3 | 0:2d0c91de9279 | 332 | { |
j3 | 0:2d0c91de9279 | 333 | result = m_i2cBus.read(I2C_R_ADRS, (local_data + 1), 1); |
j3 | 0:2d0c91de9279 | 334 | if (result == 0) |
j3 | 0:2d0c91de9279 | 335 | { |
j3 | 0:2d0c91de9279 | 336 | value = local_data[1]; |
j3 | 0:2d0c91de9279 | 337 | } |
j3 | 0:2d0c91de9279 | 338 | } |
j3 | 0:2d0c91de9279 | 339 | |
j3 | 0:2d0c91de9279 | 340 | return result; |
j3 | 0:2d0c91de9279 | 341 | } |
j3 | 0:2d0c91de9279 | 342 |