Jeannie Hur / Working_HRV

HRV -> Mood

Dependencies:   MAX30101 Hexi_KW40Z Hexi_OLED_SSD1351

8cee5929f4d8/main.cpp@11:58a443cf3f7c, 2019-03-16 (annotated)

Committer:
jeannie9809
Date:
Sat Mar 16 07:46:28 2019 +0000
Revision:
11:58a443cf3f7c
Parent:
10:3ddf92687e34
Child:
12:95d141421e18
FINALLY DONE WITH HRV

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jeannie9809 0:338c50c9c8cd 1 #include "mbed.h"
jeannie9809 0:338c50c9c8cd 2 #include "mbed_events.h"
jeannie9809 0:338c50c9c8cd 3 #include "MAX30101.h"
jeannie9809 0:338c50c9c8cd 4 #include "string.h"
jeannie9809 0:338c50c9c8cd 5 #include "Hexi_OLED_SSD1351.h"
jeannie9809 0:338c50c9c8cd 6 #include "Hexi_KW40Z.h"
jeannie9809 0:338c50c9c8cd 7 #include <math.h>
jeannie9809 6:ff1c3560db84 8 #include <vector>
jeannie9809 6:ff1c3560db84 9 using namespace std;
jeannie9809 11:58a443cf3f7c 10
jeannie9809 0:338c50c9c8cd 11 #define FIFO_DATA_MAX 288
jeannie9809 11:58a443cf3f7c 12 //#define M_PI 3.14159265358979323846
jeannie9809 11:58a443cf3f7c 13 #define M_PI 3.14159
jeannie9809 11:58a443cf3f7c 14
jeannie9809 0:338c50c9c8cd 15 void UpdateSensorData(void);
jeannie9809 0:338c50c9c8cd 16 void StartHaptic(void);
jeannie9809 0:338c50c9c8cd 17 void StopHaptic(void const *n);
jeannie9809 0:338c50c9c8cd 18 void txTask(void);
jeannie9809 0:338c50c9c8cd 19
jeannie9809 0:338c50c9c8cd 20 DigitalOut pwr1v8(PTA29);
jeannie9809 0:338c50c9c8cd 21 DigitalOut pwr3v3b(PTC13);
jeannie9809 0:338c50c9c8cd 22 DigitalOut pwr15v(PTB12);
jeannie9809 0:338c50c9c8cd 23 I2C i2c0(PTB1, PTB0);
jeannie9809 0:338c50c9c8cd 24 InterruptIn maximInterrupt(PTB18);
jeannie9809 0:338c50c9c8cd 25 Serial pc(USBTX, USBRX);
jeannie9809 0:338c50c9c8cd 26 SSD1351 oled(PTB22,PTB21,PTC13,PTB20,PTE6, PTD15);
jeannie9809 0:338c50c9c8cd 27 KW40Z kw40z_device(PTE24, PTE25);
jeannie9809 0:338c50c9c8cd 28 DigitalOut haptic(PTB9);
jeannie9809 0:338c50c9c8cd 29 EventQueue evqueue(32 * EVENTS_EVENT_SIZE);
jeannie9809 0:338c50c9c8cd 30 Thread t;
jeannie9809 0:338c50c9c8cd 31 /* Define timer for haptic feedback */
jeannie9809 0:338c50c9c8cd 32 RtosTimer hapticTimer(StopHaptic, osTimerOnce);
jeannie9809 0:338c50c9c8cd 33
jeannie9809 3:0da9235c9069 34 /*Create a Thread to handle sending BLE Sensor Data */
jeannie9809 0:338c50c9c8cd 35 Thread txThread;
jeannie9809 0:338c50c9c8cd 36 MAX30101 hr(i2c0);
jeannie9809 1:eabf219849ab 37 int ppg_single_sample;
jeannie9809 0:338c50c9c8cd 38 int mask_ppg = 0;
jeannie9809 0:338c50c9c8cd 39 uint32_t count = 0;
jeannie9809 0:338c50c9c8cd 40 uint32_t num;
jeannie9809 0:338c50c9c8cd 41 uint8_t testsignal = 60;
jeannie9809 0:338c50c9c8cd 42
jeannie9809 2:3389bdfd9afa 43 // I added this
jeannie9809 11:58a443cf3f7c 44 const int num_samples = 500; // for 30 sec
jeannie9809 0:338c50c9c8cd 45 int ppg[num_samples];
jeannie9809 1:eabf219849ab 46 int SDNN_n, SDNN;
jeannie9809 1:eabf219849ab 47 double arousal, valence, HF_LF, HF_LF_n;
jeannie9809 9:83dcb7382516 48 bool ready = false;
jeannie9809 0:338c50c9c8cd 49
jeannie9809 3:0da9235c9069 50 void StartHaptic(void)
jeannie9809 3:0da9235c9069 51 {
jeannie9809 0:338c50c9c8cd 52 hapticTimer.start(50);
jeannie9809 0:338c50c9c8cd 53 haptic = 1;
jeannie9809 0:338c50c9c8cd 54 }
jeannie9809 0:338c50c9c8cd 55 void ButtonRight(void)
jeannie9809 0:338c50c9c8cd 56 {
jeannie9809 0:338c50c9c8cd 57 StartHaptic();
jeannie9809 0:338c50c9c8cd 58 kw40z_device.ToggleAdvertisementMode();
jeannie9809 0:338c50c9c8cd 59 }
jeannie9809 0:338c50c9c8cd 60
jeannie9809 0:338c50c9c8cd 61 void ButtonLeft(void)
jeannie9809 0:338c50c9c8cd 62 {
jeannie9809 0:338c50c9c8cd 63 StartHaptic();
jeannie9809 0:338c50c9c8cd 64 kw40z_device.ToggleAdvertisementMode();
jeannie9809 0:338c50c9c8cd 65 }
jeannie9809 0:338c50c9c8cd 66
jeannie9809 3:0da9235c9069 67 void StopHaptic(void const *n)
jeannie9809 3:0da9235c9069 68 {
jeannie9809 0:338c50c9c8cd 69 haptic = 0;
jeannie9809 0:338c50c9c8cd 70 hapticTimer.stop();
jeannie9809 0:338c50c9c8cd 71 }
jeannie9809 3:0da9235c9069 72 void txTask(void)
jeannie9809 3:0da9235c9069 73 {
jeannie9809 3:0da9235c9069 74
jeannie9809 3:0da9235c9069 75 while (true) {
jeannie9809 0:338c50c9c8cd 76 UpdateSensorData();
jeannie9809 3:0da9235c9069 77
jeannie9809 0:338c50c9c8cd 78 /*Notify Hexiwear App that it is running Sensor Tag mode*/
jeannie9809 0:338c50c9c8cd 79 kw40z_device.SendSetApplicationMode(GUI_CURRENT_APP_SENSOR_TAG);
jeannie9809 0:338c50c9c8cd 80 //send heartrate
jeannie9809 3:0da9235c9069 81 kw40z_device.SendHeartRate(testsignal);
jeannie9809 0:338c50c9c8cd 82 /*The following is sending dummy data over BLE. Replace with real data*/
jeannie9809 3:0da9235c9069 83
jeannie9809 3:0da9235c9069 84 /*Send Battery Level for 20%
jeannie9809 0:338c50c9c8cd 85 kw40z_device.SendBatteryLevel(battery);
jeannie9809 3:0da9235c9069 86
jeannie9809 3:0da9235c9069 87 Send Ambient Light Level at 50%
jeannie9809 0:338c50c9c8cd 88 kw40z_device.SendAmbientLight(light);*/
jeannie9809 3:0da9235c9069 89
jeannie9809 0:338c50c9c8cd 90 /*Send Humidity at 90% */
jeannie9809 0:338c50c9c8cd 91 //kw40z_device.SendHumidity(humidity);
jeannie9809 3:0da9235c9069 92
jeannie9809 3:0da9235c9069 93 /*Send Temperature at 25 degrees Celsius
jeannie9809 0:338c50c9c8cd 94 kw40z_device.SendTemperature(temperature);
jeannie9809 0:338c50c9c8cd 95
jeannie9809 11:58a443cf3f7c 96 //Send Pressure at 100kPA
jeannie9809 11:58a443cf3f7c 97 //kw40z_device.SendPressure(pressure); */
jeannie9809 3:0da9235c9069 98
jeannie9809 3:0da9235c9069 99 /*Send Mag,Accel,Gyro Data.
jeannie9809 0:338c50c9c8cd 100 kw40z_device.SendGyro(x,y,z);
jeannie9809 0:338c50c9c8cd 101 kw40z_device.SendAccel(z,x,y);
jeannie9809 0:338c50c9c8cd 102 kw40z_device.SendMag(y,z,x);*/
jeannie9809 0:338c50c9c8cd 103
jeannie9809 3:0da9235c9069 104 Thread::wait(1000);
jeannie9809 0:338c50c9c8cd 105 }
jeannie9809 0:338c50c9c8cd 106 }
jeannie9809 0:338c50c9c8cd 107 void UpdateSensorData(void)
jeannie9809 3:0da9235c9069 108 {
jeannie9809 3:0da9235c9069 109 testsignal+=1;
jeannie9809 0:338c50c9c8cd 110 /*battery -= 5;
jeannie9809 0:338c50c9c8cd 111 if(battery < 5) battery = 100;
jeannie9809 3:0da9235c9069 112
jeannie9809 0:338c50c9c8cd 113 light += 20;
jeannie9809 0:338c50c9c8cd 114 if(light > 100) light = 0;
jeannie9809 3:0da9235c9069 115
jeannie9809 0:338c50c9c8cd 116 humidity += 500;
jeannie9809 0:338c50c9c8cd 117 if(humidity > 8000) humidity = 2000;
jeannie9809 3:0da9235c9069 118
jeannie9809 0:338c50c9c8cd 119 temperature -= 200;
jeannie9809 0:338c50c9c8cd 120 if(temperature < 200) temperature = 4200;
jeannie9809 3:0da9235c9069 121
jeannie9809 0:338c50c9c8cd 122 pressure += 300;
jeannie9809 0:338c50c9c8cd 123 if(pressure > 10300) pressure = 7500;
jeannie9809 3:0da9235c9069 124
jeannie9809 0:338c50c9c8cd 125 x += 1400;
jeannie9809 0:338c50c9c8cd 126 y -= 2300;
jeannie9809 0:338c50c9c8cd 127 z += 1700;*/
jeannie9809 0:338c50c9c8cd 128 }
jeannie9809 0:338c50c9c8cd 129
jeannie9809 3:0da9235c9069 130 void interruptHandlerQueued()
jeannie9809 3:0da9235c9069 131 {
jeannie9809 4:94190624967a 132 // int temp_ppg[num_samples];
jeannie9809 3:0da9235c9069 133 for(int iter = 0; iter < num_samples; iter+=0) {
jeannie9809 0:338c50c9c8cd 134
jeannie9809 3:0da9235c9069 135 MAX30101::InterruptBitField_u interruptStatus;
jeannie9809 3:0da9235c9069 136 hr.getInterruptStatus(interruptStatus);
jeannie9809 3:0da9235c9069 137 // printf("Interrupt Status: 0x%02x\r\n", interruptStatus.all);
jeannie9809 3:0da9235c9069 138
jeannie9809 3:0da9235c9069 139 if (interruptStatus.bits.pwr_rdy == 0x1) {
jeannie9809 3:0da9235c9069 140 // printf("Powered on\r\n");
jeannie9809 3:0da9235c9069 141
jeannie9809 3:0da9235c9069 142 // Soft reset
jeannie9809 3:0da9235c9069 143 MAX30101::ModeConfiguration_u modeConf;
jeannie9809 3:0da9235c9069 144 modeConf.all = 0;
jeannie9809 3:0da9235c9069 145 modeConf.bits.reset = 1;
jeannie9809 3:0da9235c9069 146 hr.setModeConfiguration(modeConf);
jeannie9809 3:0da9235c9069 147 wait(0.01);
jeannie9809 3:0da9235c9069 148
jeannie9809 3:0da9235c9069 149 // Configure FIFO
jeannie9809 3:0da9235c9069 150 MAX30101::FIFO_Configuration_u fifoConf;
jeannie9809 3:0da9235c9069 151 hr.getFIFOConfiguration(fifoConf);
jeannie9809 0:338c50c9c8cd 152 // pc.printf("FIFO Configuration: 0x%02x\r\n", fifoConf.all);
jeannie9809 3:0da9235c9069 153
jeannie9809 3:0da9235c9069 154 // Set LED power
jeannie9809 3:0da9235c9069 155 hr.setLEDPulseAmplitude(MAX30101::LED1_PA, 0x0C);
jeannie9809 3:0da9235c9069 156 hr.setLEDPulseAmplitude(MAX30101::ProxModeLED_PA, 0x19);
jeannie9809 0:338c50c9c8cd 157 // pc.printf("LED set\r\n");
jeannie9809 3:0da9235c9069 158
jeannie9809 3:0da9235c9069 159 MAX30101::SpO2Configuration_u spo2Conf;
jeannie9809 3:0da9235c9069 160 hr.getSpO2Configuration(spo2Conf);
jeannie9809 3:0da9235c9069 161 spo2Conf.bits.led_pw = MAX30101::PW_1;
jeannie9809 3:0da9235c9069 162 spo2Conf.bits.spo2_sr = MAX30101::SR_100_Hz;
jeannie9809 3:0da9235c9069 163 hr.setSpO2Configuration(spo2Conf);
jeannie9809 3:0da9235c9069 164 hr.getSpO2Configuration(spo2Conf);
jeannie9809 0:338c50c9c8cd 165 // pc.printf("SpO2 Configuration: 0x%02x\r\n", spo2Conf.all);
jeannie9809 3:0da9235c9069 166
jeannie9809 3:0da9235c9069 167 // Proximity settings
jeannie9809 3:0da9235c9069 168 hr.setProxIntThreshold(0x14);
jeannie9809 3:0da9235c9069 169
jeannie9809 3:0da9235c9069 170 // Enable HR mode
jeannie9809 3:0da9235c9069 171 modeConf.all = 0;
jeannie9809 3:0da9235c9069 172 modeConf.bits.mode = MAX30101::HeartRateMode;
jeannie9809 3:0da9235c9069 173 hr.setModeConfiguration(modeConf);
jeannie9809 0:338c50c9c8cd 174 // printf("Mode set\r\n");
jeannie9809 3:0da9235c9069 175 }
jeannie9809 3:0da9235c9069 176
jeannie9809 3:0da9235c9069 177 if (interruptStatus.bits.prox_int == 0x1) {
jeannie9809 0:338c50c9c8cd 178 // printf("Proximity Triggered, entered HR Mode.");
jeannie9809 3:0da9235c9069 179 }
jeannie9809 3:0da9235c9069 180
jeannie9809 3:0da9235c9069 181 if (interruptStatus.bits.ppg_rdy == 0x1) {
jeannie9809 0:338c50c9c8cd 182 // printf("PPG Ready.\r\n");
jeannie9809 3:0da9235c9069 183 mask_ppg = 1;
jeannie9809 3:0da9235c9069 184 }
jeannie9809 3:0da9235c9069 185
jeannie9809 3:0da9235c9069 186 if (interruptStatus.bits.a_full == 0x1) {
jeannie9809 0:338c50c9c8cd 187 // printf("FIFO Almost Full.\r\n");
jeannie9809 3:0da9235c9069 188 uint8_t data[FIFO_DATA_MAX];
jeannie9809 3:0da9235c9069 189 uint16_t readBytes = 0;
jeannie9809 3:0da9235c9069 190
jeannie9809 3:0da9235c9069 191 hr.readFIFO(MAX30101::OneLedChannel, data, readBytes);
jeannie9809 9:83dcb7382516 192 // printf("data length: %u \r\n",readBytes);
jeannie9809 3:0da9235c9069 193 //printf("data length: %u \r\n",data);
jeannie9809 3:0da9235c9069 194 for (uint16_t i = 0; i < readBytes; i += 3) {
jeannie9809 3:0da9235c9069 195 uint8_t sample[4] = {0};
jeannie9809 3:0da9235c9069 196 sample[0] = data[i + 2];
jeannie9809 3:0da9235c9069 197 sample[1] = data[i + 1];
jeannie9809 3:0da9235c9069 198 sample[2] = data[i];
jeannie9809 3:0da9235c9069 199
jeannie9809 3:0da9235c9069 200 num = *(uint32_t *) sample;
jeannie9809 9:83dcb7382516 201
jeannie9809 11:58a443cf3f7c 202 if (num < 0) {
jeannie9809 3:0da9235c9069 203 ppg_single_sample = 0;
jeannie9809 9:83dcb7382516 204 // printf("keep closer to your hand \r\n");
jeannie9809 3:0da9235c9069 205 } else {
jeannie9809 3:0da9235c9069 206
jeannie9809 3:0da9235c9069 207 //ppg_single_sample = 65;
jeannie9809 6:ff1c3560db84 208 ppg_single_sample = num;
jeannie9809 9:83dcb7382516 209 if(iter < num_samples && !ready) {
jeannie9809 9:83dcb7382516 210 ppg[iter] = num;
jeannie9809 9:83dcb7382516 211 // printf("%d \n", ppg[iter]);
jeannie9809 9:83dcb7382516 212 if(iter == num_samples-1)
jeannie9809 9:83dcb7382516 213 ready = true;
jeannie9809 9:83dcb7382516 214 }
jeannie9809 9:83dcb7382516 215
jeannie9809 9:83dcb7382516 216 // printf("%d ", ppg_single_sample); // I commented this out
jeannie9809 3:0da9235c9069 217 iter++;
jeannie9809 3:0da9235c9069 218 }
jeannie9809 9:83dcb7382516 219 // printf("%d; %d\r\n", iter, ppg[iter-1]);
jeannie9809 3:0da9235c9069 220
jeannie9809 3:0da9235c9069 221
jeannie9809 0:338c50c9c8cd 222 }
jeannie9809 0:338c50c9c8cd 223 }
jeannie9809 3:0da9235c9069 224
jeannie9809 3:0da9235c9069 225 interruptStatus.all = 0xFF;
jeannie9809 11:58a443cf3f7c 226
jeannie9809 3:0da9235c9069 227 if (mask_ppg == 1) {
jeannie9809 3:0da9235c9069 228 interruptStatus.bits.ppg_rdy = 0;
jeannie9809 3:0da9235c9069 229 }
jeannie9809 3:0da9235c9069 230 hr.enableInterrupts(interruptStatus);
jeannie9809 0:338c50c9c8cd 231 }
jeannie9809 4:94190624967a 232 /*
jeannie9809 4:94190624967a 233 for(int i = 0; i < num_samples; i++) {
jeannie9809 4:94190624967a 234 ppg[i] = temp_ppg[i];
jeannie9809 4:94190624967a 235 }
jeannie9809 4:94190624967a 236 */
jeannie9809 4:94190624967a 237 //ppg = temp_ppg;
jeannie9809 11:58a443cf3f7c 238
jeannie9809 0:338c50c9c8cd 239 }
jeannie9809 0:338c50c9c8cd 240
jeannie9809 3:0da9235c9069 241 void interruptHandler()
jeannie9809 3:0da9235c9069 242 {
jeannie9809 0:338c50c9c8cd 243 evqueue.call(interruptHandlerQueued);
jeannie9809 9:83dcb7382516 244 // interruptHandlerQueued();
jeannie9809 11:58a443cf3f7c 245 // printf("\nLezzgo\n");
jeannie9809 9:83dcb7382516 246 if(ready) {
jeannie9809 11:58a443cf3f7c 247 printf("\nStarting... ");
jeannie9809 11:58a443cf3f7c 248
jeannie9809 11:58a443cf3f7c 249 int i = 0;
jeannie9809 11:58a443cf3f7c 250 int j = 0;
jeannie9809 11:58a443cf3f7c 251
jeannie9809 11:58a443cf3f7c 252 double TIME[num_samples];
jeannie9809 11:58a443cf3f7c 253 for(int i = 0; i < num_samples; i++) {
jeannie9809 11:58a443cf3f7c 254 TIME[i] = (double)i*(5.0/(double)num_samples); // change to 30.0 later
jeannie9809 11:58a443cf3f7c 255 }
jeannie9809 11:58a443cf3f7c 256
jeannie9809 11:58a443cf3f7c 257 // moving average
jeannie9809 11:58a443cf3f7c 258 double movave[num_samples];
jeannie9809 11:58a443cf3f7c 259 int avecap = 25;
jeannie9809 11:58a443cf3f7c 260 for(i = 0; i < (avecap-1)/2; i++) {
jeannie9809 11:58a443cf3f7c 261 movave[i] = (double)ppg[0];
jeannie9809 11:58a443cf3f7c 262 for(j = 1; j < 1+(avecap-1)/2; j++) {
jeannie9809 11:58a443cf3f7c 263 movave[i] = movave[i] + (double)ppg[j];
jeannie9809 11:58a443cf3f7c 264 }
jeannie9809 11:58a443cf3f7c 265 movave[i] = (double)(movave[i]/(i+(avecap-1)/2-1));
jeannie9809 11:58a443cf3f7c 266 }
jeannie9809 11:58a443cf3f7c 267 for(i = (num_samples-(avecap-1)/2); i < num_samples; i++) {
jeannie9809 11:58a443cf3f7c 268 movave[i] = (double)ppg[i-(avecap-1)/2-1];
jeannie9809 11:58a443cf3f7c 269 for(j = (i-(avecap-1)/2); j < num_samples; j++) {
jeannie9809 11:58a443cf3f7c 270 movave[i] = movave[i] + (double)ppg[j];
jeannie9809 11:58a443cf3f7c 271 }
jeannie9809 11:58a443cf3f7c 272 movave[i] = movave[i]/(double)(num_samples-i+(avecap-1)/2);
jeannie9809 11:58a443cf3f7c 273 }
jeannie9809 11:58a443cf3f7c 274 for(i = (avecap-1)/2; i < (num_samples-(avecap-1)/2); i++) {
jeannie9809 11:58a443cf3f7c 275 movave[i] = (double)ppg[i-(avecap-1)/2-1];
jeannie9809 11:58a443cf3f7c 276 for(j = i-(avecap-1)/2; j < i+(avecap-1)/2; j++) {
jeannie9809 11:58a443cf3f7c 277 movave[i] = movave[i] + (double)ppg[j];
jeannie9809 11:58a443cf3f7c 278 }
jeannie9809 11:58a443cf3f7c 279 movave[i] = movave[i]/(double)avecap;
jeannie9809 4:94190624967a 280 }
jeannie9809 11:58a443cf3f7c 281
jeannie9809 11:58a443cf3f7c 282 // normalize ppg
jeannie9809 11:58a443cf3f7c 283 for(i = 0; i < num_samples; i++) {
jeannie9809 11:58a443cf3f7c 284 ppg[i] = ppg[i] - (int)movave[i];
jeannie9809 11:58a443cf3f7c 285 if(ppg[i] > 1000 || ppg[i] < -1000)
jeannie9809 11:58a443cf3f7c 286 ppg[i] = 0;
jeannie9809 11:58a443cf3f7c 287 }
jeannie9809 11:58a443cf3f7c 288
jeannie9809 11:58a443cf3f7c 289 // smoothing curve
jeannie9809 11:58a443cf3f7c 290 for(i = 1; i < num_samples; i++) {
jeannie9809 11:58a443cf3f7c 291 ppg[i] = ppg[i] + ppg[i-1];
jeannie9809 11:58a443cf3f7c 292 //printf("%d ", ppg[i]);
jeannie9809 4:94190624967a 293 }
jeannie9809 11:58a443cf3f7c 294
jeannie9809 11:58a443cf3f7c 295 // AMPD Algorithm
jeannie9809 11:58a443cf3f7c 296 const int kcap = 25;
jeannie9809 11:58a443cf3f7c 297 int m[kcap][num_samples];
jeannie9809 11:58a443cf3f7c 298 for(int k = 1; k <= kcap; k++) {
jeannie9809 11:58a443cf3f7c 299 for(i = 1; i < num_samples; i++) {
jeannie9809 11:58a443cf3f7c 300 if(i-1 < 0 || i-k-1 < 0 || i+k-1 >= num_samples)
jeannie9809 11:58a443cf3f7c 301 m[k-1][i] = 0;
jeannie9809 11:58a443cf3f7c 302 else if(ppg[i-1] > ppg[i-k-1] && ppg[i-1] > ppg[i+k-1])
jeannie9809 11:58a443cf3f7c 303 m[k-1][i] = 1;
jeannie9809 11:58a443cf3f7c 304 else
jeannie9809 11:58a443cf3f7c 305 m[k-1][i] = 0;
jeannie9809 11:58a443cf3f7c 306 }
jeannie9809 11:58a443cf3f7c 307 }
jeannie9809 11:58a443cf3f7c 308
jeannie9809 11:58a443cf3f7c 309 int max_mult[num_samples];
jeannie9809 11:58a443cf3f7c 310 for(i = 0; i < num_samples; i++) { // max_mult = m(1,:)';
jeannie9809 11:58a443cf3f7c 311 max_mult[i] = m[0][i];
jeannie9809 11:58a443cf3f7c 312 }
jeannie9809 11:58a443cf3f7c 313
jeannie9809 11:58a443cf3f7c 314 for(int k = 1; k < kcap; k++) {
jeannie9809 11:58a443cf3f7c 315 for(i = 0; i < num_samples; i++) {
jeannie9809 11:58a443cf3f7c 316 max_mult[i] = max_mult[i]*m[k][i];
jeannie9809 11:58a443cf3f7c 317 }
jeannie9809 11:58a443cf3f7c 318 }
jeannie9809 11:58a443cf3f7c 319
jeannie9809 11:58a443cf3f7c 320 int num_max = 0;
jeannie9809 11:58a443cf3f7c 321 // extract times that are max
jeannie9809 11:58a443cf3f7c 322 for(i = 0; i < num_samples; i++) {
jeannie9809 11:58a443cf3f7c 323 num_max = num_max + max_mult[i];
jeannie9809 4:94190624967a 324 }
jeannie9809 11:58a443cf3f7c 325
jeannie9809 11:58a443cf3f7c 326 // printf("num_max = %d ", num_max);
jeannie9809 11:58a443cf3f7c 327
jeannie9809 11:58a443cf3f7c 328 vector<double> time_of_max;
jeannie9809 11:58a443cf3f7c 329 vector<int> index_of_max;
jeannie9809 11:58a443cf3f7c 330 vector<int> max_points;
jeannie9809 11:58a443cf3f7c 331 for(i = 0; i < num_samples; i++) {
jeannie9809 11:58a443cf3f7c 332 if(max_mult[i] == 1) {
jeannie9809 11:58a443cf3f7c 333 time_of_max.push_back(TIME[i-1]);
jeannie9809 11:58a443cf3f7c 334 index_of_max.push_back(i-1);
jeannie9809 11:58a443cf3f7c 335 max_points.push_back(ppg[i-1]);
jeannie9809 11:58a443cf3f7c 336 }
jeannie9809 11:58a443cf3f7c 337 }
jeannie9809 11:58a443cf3f7c 338
jeannie9809 11:58a443cf3f7c 339 // calculating HRV
jeannie9809 11:58a443cf3f7c 340 vector<double> r;
jeannie9809 11:58a443cf3f7c 341 vector<int> index_r;
jeannie9809 11:58a443cf3f7c 342 double mean_inter_time = 0;
jeannie9809 11:58a443cf3f7c 343 for(i = 0; i < num_max-1; i++) {
jeannie9809 11:58a443cf3f7c 344 r.push_back(time_of_max.at(i+1)-time_of_max.at(i));
jeannie9809 11:58a443cf3f7c 345 index_r.push_back(index_of_max.at(i+1) - index_of_max.at(i));
jeannie9809 11:58a443cf3f7c 346 mean_inter_time = mean_inter_time + r.at(i);
jeannie9809 11:58a443cf3f7c 347 }
jeannie9809 11:58a443cf3f7c 348
jeannie9809 11:58a443cf3f7c 349 //printf("r: %.2f %.2f %.2f ", r.at(0), r.at(1), r.at(2));
jeannie9809 11:58a443cf3f7c 350 mean_inter_time = mean_inter_time/(double)(num_max-1);
jeannie9809 11:58a443cf3f7c 351
jeannie9809 11:58a443cf3f7c 352 // getting rid of outlier points in r
jeannie9809 11:58a443cf3f7c 353 for(i = 0; i < num_max-1; i++) {
jeannie9809 11:58a443cf3f7c 354 if(r.at(i) > mean_inter_time + 0.11)
jeannie9809 11:58a443cf3f7c 355 r.at(i) = mean_inter_time + 0.11;
jeannie9809 11:58a443cf3f7c 356 else if(r.at(i) < mean_inter_time - 0.11)
jeannie9809 11:58a443cf3f7c 357 r.at(i) = mean_inter_time - 0.11;
jeannie9809 11:58a443cf3f7c 358 }
jeannie9809 11:58a443cf3f7c 359
jeannie9809 11:58a443cf3f7c 360 // SDNN -- std of normal to normal R-R intervals
jeannie9809 11:58a443cf3f7c 361 mean_inter_time = 0;
jeannie9809 11:58a443cf3f7c 362 for(i = 0; i < num_max-1; i++) {
jeannie9809 11:58a443cf3f7c 363 mean_inter_time = mean_inter_time + r.at(i);
jeannie9809 5:a6b6d0e5a69f 364 }
jeannie9809 11:58a443cf3f7c 365 mean_inter_time = double(mean_inter_time/(num_max-1));
jeannie9809 11:58a443cf3f7c 366 double SDNN_doub = 0.0;
jeannie9809 11:58a443cf3f7c 367 for(i = 0; i < num_max-1; i++) {
jeannie9809 11:58a443cf3f7c 368 SDNN_doub = SDNN_doub + (r.at(i)-mean_inter_time)*(r.at(i)-mean_inter_time);
jeannie9809 11:58a443cf3f7c 369 }
jeannie9809 11:58a443cf3f7c 370 SDNN = (int)(sqrt(SDNN_doub/(num_max-1))*1000);
jeannie9809 11:58a443cf3f7c 371 printf("SDNN = %d ", SDNN);
jeannie9809 11:58a443cf3f7c 372
jeannie9809 11:58a443cf3f7c 373 // TIME TO CALCULATE HF/LF
jeannie9809 11:58a443cf3f7c 374 // FFT: use movave as fftppg
jeannie9809 5:a6b6d0e5a69f 375 for(i = 0; i < num_samples; i++) {
jeannie9809 11:58a443cf3f7c 376 double real = 0;
jeannie9809 11:58a443cf3f7c 377 double im = 0;
jeannie9809 11:58a443cf3f7c 378 double dum_ppg;
jeannie9809 11:58a443cf3f7c 379 for(j = 0; j < num_samples; j++) {
jeannie9809 11:58a443cf3f7c 380 dum_ppg = (double) ppg[j];
jeannie9809 11:58a443cf3f7c 381 real = real + dum_ppg * cos(2.0*M_PI*(double)(j*i)/(double)num_samples);
jeannie9809 11:58a443cf3f7c 382 im = im + dum_ppg * sin(2.0*M_PI*(double)(j*i)/(double)num_samples);
jeannie9809 11:58a443cf3f7c 383 }
jeannie9809 11:58a443cf3f7c 384 movave[i] = sqrt(real*real + im*im)/(double)num_samples;
jeannie9809 11:58a443cf3f7c 385 }
jeannie9809 11:58a443cf3f7c 386
jeannie9809 11:58a443cf3f7c 387
jeannie9809 11:58a443cf3f7c 388 // make frequency array: use TIME
jeannie9809 11:58a443cf3f7c 389 double sampling_freq = (double)(1/TIME[1]);
jeannie9809 11:58a443cf3f7c 390 for(i = 0; i < num_samples; i++) {
jeannie9809 11:58a443cf3f7c 391 TIME[i] = sampling_freq*(double)(i)/(double)(num_samples);
jeannie9809 5:a6b6d0e5a69f 392 }
jeannie9809 11:58a443cf3f7c 393
jeannie9809 11:58a443cf3f7c 394 double LF = 0.0;
jeannie9809 11:58a443cf3f7c 395 i = 0;
jeannie9809 11:58a443cf3f7c 396 while(TIME[i] < 0.15) {
jeannie9809 11:58a443cf3f7c 397 LF = LF + movave[i];
jeannie9809 11:58a443cf3f7c 398 i++;
jeannie9809 11:58a443cf3f7c 399 }
jeannie9809 11:58a443cf3f7c 400
jeannie9809 11:58a443cf3f7c 401 double HF = 0.0;
jeannie9809 11:58a443cf3f7c 402 while(TIME[i] < 0.4) {
jeannie9809 11:58a443cf3f7c 403 HF = HF + movave[i];
jeannie9809 11:58a443cf3f7c 404 i++;
jeannie9809 11:58a443cf3f7c 405 }
jeannie9809 11:58a443cf3f7c 406 HF_LF = HF/LF;
jeannie9809 11:58a443cf3f7c 407 printf("HF/LF = %.2f \n", HF_LF);
jeannie9809 11:58a443cf3f7c 408
jeannie9809 11:58a443cf3f7c 409
jeannie9809 11:58a443cf3f7c 410 ready = false; // last line
jeannie9809 11:58a443cf3f7c 411
jeannie9809 5:a6b6d0e5a69f 412 }
jeannie9809 11:58a443cf3f7c 413
jeannie9809 0:338c50c9c8cd 414 }
jeannie9809 0:338c50c9c8cd 415
jeannie9809 0:338c50c9c8cd 416 // main() runs in its own thread in the OS
jeannie9809 3:0da9235c9069 417 int main()
jeannie9809 3:0da9235c9069 418 {
jeannie9809 0:338c50c9c8cd 419 // printf("Hello world.\r\n");
jeannie9809 4:94190624967a 420
jeannie9809 0:338c50c9c8cd 421 t.start(callback(&evqueue, &EventQueue::dispatch_forever));
jeannie9809 0:338c50c9c8cd 422 kw40z_device.attach_buttonLeft(&ButtonLeft);
jeannie9809 0:338c50c9c8cd 423 kw40z_device.attach_buttonRight(&ButtonRight);
jeannie9809 3:0da9235c9069 424
jeannie9809 0:338c50c9c8cd 425 pwr1v8 = 1;
jeannie9809 0:338c50c9c8cd 426 pwr3v3b = 1;
jeannie9809 0:338c50c9c8cd 427 pwr15v = 0;
jeannie9809 3:0da9235c9069 428
jeannie9809 0:338c50c9c8cd 429 maximInterrupt.fall(interruptHandler);
jeannie9809 0:338c50c9c8cd 430 maximInterrupt.enable_irq();
jeannie9809 3:0da9235c9069 431
jeannie9809 0:338c50c9c8cd 432 MAX30101::InterruptBitField_u interruptStatus;
jeannie9809 0:338c50c9c8cd 433 interruptStatus.all = 0xFF;
jeannie9809 0:338c50c9c8cd 434 hr.enableInterrupts(interruptStatus);
jeannie9809 3:0da9235c9069 435
jeannie9809 3:0da9235c9069 436 char text[20]; /* Text Buffer */
jeannie9809 0:338c50c9c8cd 437 oled_text_properties_t textProperties = {0};
jeannie9809 3:0da9235c9069 438 oled.GetTextProperties(&textProperties);
jeannie9809 0:338c50c9c8cd 439 /* Turn on the backlight of the OLED Display */
jeannie9809 0:338c50c9c8cd 440 oled.DimScreenON();
jeannie9809 3:0da9235c9069 441
jeannie9809 3:0da9235c9069 442 /* Fills the screen with solid black */
jeannie9809 0:338c50c9c8cd 443 oled.FillScreen(COLOR_BLACK);
jeannie9809 1:eabf219849ab 444 strcpy((char *) text, "Raw PPG:");
jeannie9809 0:338c50c9c8cd 445 oled.Label((uint8_t *)text,7,0);
jeannie9809 3:0da9235c9069 446
jeannie9809 11:58a443cf3f7c 447 strcpy((char *) text, " LOFI");
jeannie9809 0:338c50c9c8cd 448 oled.Label((uint8_t *)text,7,40);
jeannie9809 0:338c50c9c8cd 449 //dynamic text setup
jeannie9809 0:338c50c9c8cd 450 textProperties.fontColor = COLOR_WHITE;
jeannie9809 0:338c50c9c8cd 451 textProperties.alignParam = OLED_TEXT_ALIGN_RIGHT;
jeannie9809 3:0da9235c9069 452 oled.SetTextProperties(&textProperties);
jeannie9809 3:0da9235c9069 453
jeannie9809 0:338c50c9c8cd 454 txThread.start(txTask);
jeannie9809 11:58a443cf3f7c 455
jeannie9809 11:58a443cf3f7c 456
jeannie9809 0:338c50c9c8cd 457 while (true) {
jeannie9809 3:0da9235c9069 458
jeannie9809 11:58a443cf3f7c 459 // Format the time reading
jeannie9809 1:eabf219849ab 460 sprintf(text,"%d",ppg_single_sample);
jeannie9809 0:338c50c9c8cd 461 oled.TextBox((uint8_t *)text,55,15,35,15); //Increase textbox for more digits
jeannie9809 11:58a443cf3f7c 462
jeannie9809 11:58a443cf3f7c 463 /*
jeannie9809 11:58a443cf3f7c 464 // Display time reading in 35px by 15px textbox at(x=55, y=40)
jeannie9809 3:0da9235c9069 465 if (ppg_single_sample > 45) {
jeannie9809 1:eabf219849ab 466 sprintf(text,"%d; %.2f",SDNN, HF_LF);
jeannie9809 3:0da9235c9069 467
jeannie9809 11:58a443cf3f7c 468 // Display time reading in 35px by 15px textbox at(x=55, y=40)
jeannie9809 0:338c50c9c8cd 469 oled.TextBox((uint8_t *)text,55,55,35,15); //Increase textbox for more digits
jeannie9809 3:0da9235c9069 470 } else {
jeannie9809 0:338c50c9c8cd 471 sprintf(text,"wait HR");
jeannie9809 3:0da9235c9069 472
jeannie9809 11:58a443cf3f7c 473 // Display time reading in 35px by 15px textbox at(x=55, y=40)
jeannie9809 0:338c50c9c8cd 474 oled.TextBox((uint8_t *)text,55,55,35,15);
jeannie9809 11:58a443cf3f7c 475 }*/
jeannie9809 11:58a443cf3f7c 476
jeannie9809 11:58a443cf3f7c 477
jeannie9809 3:0da9235c9069 478
jeannie9809 0:338c50c9c8cd 479 Thread::wait(1000);
jeannie9809 3:0da9235c9069 480 }
jeannie9809 0:338c50c9c8cd 481 return 0;
jeannie9809 0:338c50c9c8cd 482 }
jeannie9809 0:338c50c9c8cd 483