Nora Vazbyte / Mbed 2 deprecated BLE_Heartrate_VL53L0X

workss

Dependencies:   mbed BLE_API nRF51822 VL53L0X

main.cpp@36:fb7f31e53ed9, 2019-03-14 (annotated)

Committer:
vazbyte
Date:
Thu Mar 14 20:18:38 2019 +0000
Revision:
36:fb7f31e53ed9
Parent:
35:daf134714cee
Child:
37:5792986fea5d
implemented sending current time on bluetooth connect

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vazbyte 35:daf134714cee 1 #include <stdio.h>
vazbyte 35:daf134714cee 2 #include <math.h>
mbedAustin 0:cd5b6733aeb1 3 #include "mbed.h"
andresag 19:477567297aac 4 #include "ble/BLE.h"
vazbyte 24:931eeb8a70fc 5 #include "VL53L0X.h"
vazbyte 25:0a0805c118c0 6 #include "ble/services/HeartRateService.h"
vazbyte 31:d1ceadbc6c44 7
vazbyte 29:6ba8491c1dab 8 #define range1_addr (0x56)
vazbyte 29:6ba8491c1dab 9 #define range2_addr (0x60)
vazbyte 29:6ba8491c1dab 10 #define range1_XSHUT p15
vazbyte 29:6ba8491c1dab 11 #define range2_XSHUT p16
vazbyte 29:6ba8491c1dab 12 #define VL53L0_I2C_SDA p30
vazbyte 29:6ba8491c1dab 13 #define VL53L0_I2C_SCL p7
vazbyte 35:daf134714cee 14 #define TIME_SCALE 3 // sensors activated every 100ms * TIME_SCALE = 0.3 seconds
vazbyte 29:6ba8491c1dab 15 #define DIST_MIN 0
vazbyte 29:6ba8491c1dab 16 #define DIST_MAX 22
vazbyte 35:daf134714cee 17 //#define TIMESTAMP_FREQ 3000 // PROD: time granularity is 100ms * TIMESTAMP_FREQ = 5 minutes
vazbyte 35:daf134714cee 18 #define TIMESTAMP_FREQ 300 // DEV: time granularity is 100ms * TIMESTAMP_FREQ = 30 seconds
vazbyte 35:daf134714cee 19 //#define MAX_TIME 1728000 // PROD: keep track of 100ms * MAX_TIME = 2880 minutes = 2 days
vazbyte 35:daf134714cee 20 #define MAX_TIME 172800 // DEV: keep track of 100ms * MAX_TIME = 288 minutes = 4.8 hours
vazbyte 24:931eeb8a70fc 21
vazbyte 24:931eeb8a70fc 22 Serial pc(USBTX, USBRX);
vazbyte 24:931eeb8a70fc 23 static DevI2C devI2c(VL53L0_I2C_SDA, VL53L0_I2C_SCL);
vazbyte 24:931eeb8a70fc 24 DigitalOut led1(LED1);
vazbyte 24:931eeb8a70fc 25 DigitalOut led2(LED2);
vazbyte 24:931eeb8a70fc 26 DigitalOut led(LED3, 1);
mbedAustin 9:b33f42191584 27 uint16_t customServiceUUID = 0xA000;
mbedAustin 13:62b1d32745ac 28 uint16_t readCharUUID = 0xA001;
mbedAustin 9:b33f42191584 29 uint16_t writeCharUUID = 0xA002;
vazbyte 31:d1ceadbc6c44 30
vazbyte 24:931eeb8a70fc 31 static DigitalOut shutdown1_pin(range1_XSHUT);
vazbyte 24:931eeb8a70fc 32 static VL53L0X range1(&devI2c, &shutdown1_pin, NC);
vazbyte 24:931eeb8a70fc 33 static DigitalOut shutdown2_pin(range2_XSHUT);
vazbyte 24:931eeb8a70fc 34 static VL53L0X range2(&devI2c, &shutdown2_pin, NC);
vazbyte 31:d1ceadbc6c44 35
vazbyte 33:3fad9e7238a4 36 uint32_t distance1, distance2;
vazbyte 33:3fad9e7238a4 37 int dist1, dist2, status1, status2;
vazbyte 35:daf134714cee 38 int timestamp = 0, current_time = 0;
vazbyte 24:931eeb8a70fc 39
vazbyte 31:d1ceadbc6c44 40 const static int cw = 20 / TIME_SCALE;
vazbyte 35:daf134714cee 41 const static int time_cycle = TIMESTAMP_FREQ / TIME_SCALE;
vazbyte 35:daf134714cee 42 const static int maximum_time = MAX_TIME / TIMESTAMP_FREQ;
vazbyte 31:d1ceadbc6c44 43 int countdown = cw;
vazbyte 31:d1ceadbc6c44 44 bool countdown1_triggered = false, countdown2_triggered = false;
vazbyte 31:d1ceadbc6c44 45 bool step_in = false, step_out = false;
vazbyte 34:1d3818f8c1a1 46 bool range1_just_triggered = false, range2_just_triggered = false;
vazbyte 31:d1ceadbc6c44 47
vazbyte 33:3fad9e7238a4 48 const static char DEVICE_NAME[] = "OCCUPY-CRICHTON-ST";
vazbyte 33:3fad9e7238a4 49 static const uint16_t uuid16_list[] = {GattService::UUID_HEART_RATE_SERVICE};
vazbyte 35:daf134714cee 50 int * encoded_array;
vazbyte 31:d1ceadbc6c44 51
vazbyte 25:0a0805c118c0 52 HeartRateService *hrService;
vazbyte 26:793d65b08afb 53 uint8_t hrmCounter = 0;
vazbyte 27:903ec28ea7a0 54 int format_dist(int distance) {
vazbyte 27:903ec28ea7a0 55 int result;
vazbyte 36:fb7f31e53ed9 56 if (distance > 2550)
vazbyte 36:fb7f31e53ed9 57 result = 255;
vazbyte 27:903ec28ea7a0 58 else
vazbyte 27:903ec28ea7a0 59 result = distance/10;
vazbyte 27:903ec28ea7a0 60 return result;
vazbyte 27:903ec28ea7a0 61 }
vazbyte 35:daf134714cee 62
vazbyte 35:daf134714cee 63 void dec_to_bin(int decimal, int bin[]) {
vazbyte 35:daf134714cee 64 int temp;
vazbyte 35:daf134714cee 65 // encoding little-endian
vazbyte 35:daf134714cee 66 for (int i = 10; i >= 0; i--) {
vazbyte 35:daf134714cee 67 temp = decimal >> i;
vazbyte 35:daf134714cee 68 bin[i] = temp&1;
vazbyte 35:daf134714cee 69 }
vazbyte 35:daf134714cee 70 }
vazbyte 35:daf134714cee 71
vazbyte 35:daf134714cee 72 int bin_to_dec(int binary) {
vazbyte 35:daf134714cee 73 int rem, temp, dec = 0, b = 1;
vazbyte 35:daf134714cee 74 temp = binary;
vazbyte 35:daf134714cee 75 while (temp > 0)
vazbyte 35:daf134714cee 76 {
vazbyte 35:daf134714cee 77 rem = temp % 10;
vazbyte 35:daf134714cee 78 dec = dec + rem * b;
vazbyte 35:daf134714cee 79 b *= 2;
vazbyte 35:daf134714cee 80 temp /= 10;
vazbyte 35:daf134714cee 81 }
vazbyte 35:daf134714cee 82 return dec;
vazbyte 35:daf134714cee 83 }
vazbyte 35:daf134714cee 84
vazbyte 35:daf134714cee 85 void encode_bin(int direction, int time, int encoding[]) {
vazbyte 35:daf134714cee 86 time = time % maximum_time;
vazbyte 35:daf134714cee 87 int bin[11] = {0};
vazbyte 35:daf134714cee 88 dec_to_bin(time, bin);
vazbyte 35:daf134714cee 89
vazbyte 35:daf134714cee 90 // for checking transmission errors:
vazbyte 35:daf134714cee 91 // sending as 2 messages; designating them with 0 (1st part) and 1`(2nd part)
vazbyte 35:daf134714cee 92 encoding [8] = 1;
vazbyte 35:daf134714cee 93 encoding [0] = 0;
vazbyte 35:daf134714cee 94
vazbyte 35:daf134714cee 95 // used to send the current time when Bluetooth connection established
vazbyte 35:daf134714cee 96 if (direction == -1) {
vazbyte 35:daf134714cee 97 encoding[15] = 1;
vazbyte 35:daf134714cee 98 encoding[7] = 1;
vazbyte 35:daf134714cee 99
vazbyte 35:daf134714cee 100 } else {
vazbyte 35:daf134714cee 101 encoding[15] = 0;
vazbyte 35:daf134714cee 102 encoding[7] = 0;
vazbyte 35:daf134714cee 103
vazbyte 35:daf134714cee 104 // to distinguish whether movement was IN (1) or OUT (0)
vazbyte 35:daf134714cee 105 if (direction == 1) {
vazbyte 35:daf134714cee 106 encoding[1] = 1;
vazbyte 35:daf134714cee 107 } else {
vazbyte 35:daf134714cee 108 encoding[1] = 0;
vazbyte 35:daf134714cee 109 }
vazbyte 35:daf134714cee 110 }
vazbyte 35:daf134714cee 111
vazbyte 35:daf134714cee 112 int count = 10;
vazbyte 35:daf134714cee 113 for (int i = 14; i >= 2; i--) {
vazbyte 35:daf134714cee 114 if (i == 8 || i == 7) { }
vazbyte 35:daf134714cee 115 else {
vazbyte 35:daf134714cee 116 encoding[i] = bin[count];
vazbyte 35:daf134714cee 117 count--;
vazbyte 35:daf134714cee 118 }
vazbyte 35:daf134714cee 119 }
vazbyte 35:daf134714cee 120 }
vazbyte 35:daf134714cee 121
vazbyte 35:daf134714cee 122 void create_packets(int encoding[], double& packet1, double& packet2) {
vazbyte 35:daf134714cee 123 double binary1 = 0, binary2 = 0;
vazbyte 35:daf134714cee 124 for (int i = 0; i < 8; i++) {
vazbyte 35:daf134714cee 125 binary1 += encoding[i] * pow(10, (double)i);
vazbyte 35:daf134714cee 126 binary2 += encoding[8+i] * pow(10, (double)i);
vazbyte 35:daf134714cee 127 }
vazbyte 35:daf134714cee 128 packet1 = bin_to_dec(binary1);
vazbyte 35:daf134714cee 129 packet2 = bin_to_dec(binary2);
vazbyte 35:daf134714cee 130 }
vazbyte 36:fb7f31e53ed9 131
vazbyte 36:fb7f31e53ed9 132 void send_packet(int direction, int time) {
vazbyte 36:fb7f31e53ed9 133 int encoding [16] = {0};
vazbyte 36:fb7f31e53ed9 134 encode_bin(direction, time, encoding);
vazbyte 36:fb7f31e53ed9 135 double packet1, packet2;
vazbyte 36:fb7f31e53ed9 136 create_packets(encoding, packet1, packet2);
vazbyte 36:fb7f31e53ed9 137 int p1 = (int)packet1;
vazbyte 36:fb7f31e53ed9 138 int p2 = (int)packet2;
vazbyte 36:fb7f31e53ed9 139
vazbyte 36:fb7f31e53ed9 140 hrmCounter = p1;
vazbyte 36:fb7f31e53ed9 141 hrService->updateHeartRate(hrmCounter);
vazbyte 36:fb7f31e53ed9 142 printf("sent packet %i\n", p1);
vazbyte 36:fb7f31e53ed9 143 hrmCounter = p2;
vazbyte 36:fb7f31e53ed9 144 hrService->updateHeartRate(hrmCounter);
vazbyte 36:fb7f31e53ed9 145 printf("sent packet %i\n", p2);
vazbyte 36:fb7f31e53ed9 146 }
vazbyte 36:fb7f31e53ed9 147
vazbyte 36:fb7f31e53ed9 148 void connectionCallback(const Gap::ConnectionCallbackParams_t *) {
vazbyte 36:fb7f31e53ed9 149 printf("Bluetooth connected at %i\n", current_time);
vazbyte 36:fb7f31e53ed9 150 send_packet(-1, current_time);
vazbyte 36:fb7f31e53ed9 151 }
vazbyte 36:fb7f31e53ed9 152
vazbyte 36:fb7f31e53ed9 153 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *)
vazbyte 36:fb7f31e53ed9 154 {
vazbyte 36:fb7f31e53ed9 155 printf("Bluetooth disconnected at %i\n", current_time);
vazbyte 36:fb7f31e53ed9 156 BLE::Instance(BLE::DEFAULT_INSTANCE).gap().startAdvertising();
vazbyte 36:fb7f31e53ed9 157 }
vazbyte 36:fb7f31e53ed9 158
vazbyte 36:fb7f31e53ed9 159 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
vazbyte 36:fb7f31e53ed9 160 {
vazbyte 36:fb7f31e53ed9 161 BLE &ble = params->ble;
vazbyte 36:fb7f31e53ed9 162 ble_error_t error = params->error;
vazbyte 36:fb7f31e53ed9 163
vazbyte 36:fb7f31e53ed9 164 if (error != BLE_ERROR_NONE) {
vazbyte 36:fb7f31e53ed9 165 return;
vazbyte 36:fb7f31e53ed9 166 }
vazbyte 36:fb7f31e53ed9 167
vazbyte 36:fb7f31e53ed9 168 ble.gap().onConnection(connectionCallback);
vazbyte 36:fb7f31e53ed9 169 ble.gap().onDisconnection(disconnectionCallback);
vazbyte 36:fb7f31e53ed9 170 hrService = new HeartRateService(ble, hrmCounter, HeartRateService::LOCATION_FINGER);
vazbyte 36:fb7f31e53ed9 171
vazbyte 36:fb7f31e53ed9 172 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
vazbyte 36:fb7f31e53ed9 173 ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
vazbyte 36:fb7f31e53ed9 174 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
vazbyte 36:fb7f31e53ed9 175 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
vazbyte 36:fb7f31e53ed9 176 ble.gap().setAdvertisingInterval(100);
vazbyte 36:fb7f31e53ed9 177 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::GENERIC_HEART_RATE_SENSOR);
vazbyte 36:fb7f31e53ed9 178
vazbyte 36:fb7f31e53ed9 179 ble.gap().startAdvertising();
vazbyte 36:fb7f31e53ed9 180 }
vazbyte 31:d1ceadbc6c44 181
vazbyte 23:52e8e05df60c 182 void wakeup_event_cb() {
vazbyte 36:fb7f31e53ed9 183
vazbyte 23:52e8e05df60c 184 led != led;
vazbyte 35:daf134714cee 185 timestamp++;
vazbyte 35:daf134714cee 186 ::current_time = timestamp / time_cycle;
vazbyte 24:931eeb8a70fc 187
vazbyte 29:6ba8491c1dab 188 if (countdown1_triggered) {
vazbyte 29:6ba8491c1dab 189 countdown--;
vazbyte 29:6ba8491c1dab 190 if (countdown == 0) {
vazbyte 29:6ba8491c1dab 191 countdown1_triggered = false;
vazbyte 29:6ba8491c1dab 192 }
vazbyte 29:6ba8491c1dab 193 }
vazbyte 29:6ba8491c1dab 194 if (countdown2_triggered) {
vazbyte 29:6ba8491c1dab 195 countdown--;
vazbyte 29:6ba8491c1dab 196 if (countdown == 0) {
vazbyte 29:6ba8491c1dab 197 countdown2_triggered = false;
vazbyte 29:6ba8491c1dab 198 }
vazbyte 29:6ba8491c1dab 199 }
vazbyte 31:d1ceadbc6c44 200
vazbyte 24:931eeb8a70fc 201 status1 = range1.get_distance(&distance1);
vazbyte 24:931eeb8a70fc 202 status2 = range2.get_distance(&distance2);
vazbyte 26:793d65b08afb 203
vazbyte 27:903ec28ea7a0 204 dist1 = format_dist(distance1);
vazbyte 27:903ec28ea7a0 205 dist2 = format_dist(distance2);
vazbyte 31:d1ceadbc6c44 206
vazbyte 24:931eeb8a70fc 207 if (status1 == VL53L0X_ERROR_NONE) {
vazbyte 35:daf134714cee 208 // printf("Range1 [mm]: %6ld\r\n", dist1);
vazbyte 29:6ba8491c1dab 209 if (dist1 > DIST_MIN && dist1 < DIST_MAX) {
vazbyte 24:931eeb8a70fc 210 led1 = 0;
vazbyte 29:6ba8491c1dab 211
vazbyte 29:6ba8491c1dab 212 if (!countdown1_triggered && !countdown2_triggered) {
vazbyte 29:6ba8491c1dab 213 countdown1_triggered = true;
vazbyte 29:6ba8491c1dab 214 countdown = cw;
vazbyte 34:1d3818f8c1a1 215 } else if (countdown2_triggered && !range1_just_triggered) {
vazbyte 29:6ba8491c1dab 216 printf("STEP IN DETECTED\n");
vazbyte 32:b9306ebceb61 217 hrmCounter = 1;
vazbyte 32:b9306ebceb61 218 hrService->updateHeartRate(hrmCounter);
vazbyte 29:6ba8491c1dab 219 countdown2_triggered = false;
vazbyte 29:6ba8491c1dab 220 }
vazbyte 34:1d3818f8c1a1 221
vazbyte 34:1d3818f8c1a1 222 range1_just_triggered = true;
vazbyte 24:931eeb8a70fc 223 }
vazbyte 24:931eeb8a70fc 224 else {
vazbyte 24:931eeb8a70fc 225 led1 = 1;
vazbyte 34:1d3818f8c1a1 226 range1_just_triggered = false;
vazbyte 24:931eeb8a70fc 227 }
vazbyte 24:931eeb8a70fc 228 } else {
vazbyte 34:1d3818f8c1a1 229 // printf("Range1 [mm]: --\r\n");
vazbyte 24:931eeb8a70fc 230 led1 = 1;
vazbyte 34:1d3818f8c1a1 231 range2_just_triggered = false;
vazbyte 24:931eeb8a70fc 232 }
vazbyte 24:931eeb8a70fc 233 if (status2 == VL53L0X_ERROR_NONE) {
vazbyte 35:daf134714cee 234 // printf("Range2 [mm]: %6ld\r\n", dist2);
vazbyte 29:6ba8491c1dab 235 if (dist2 > DIST_MIN && dist2 < DIST_MAX) {
vazbyte 27:903ec28ea7a0 236 led2 = 0;
vazbyte 29:6ba8491c1dab 237
vazbyte 29:6ba8491c1dab 238 if (!countdown1_triggered && !countdown2_triggered) {
vazbyte 29:6ba8491c1dab 239 countdown2_triggered = true;
vazbyte 29:6ba8491c1dab 240 countdown = cw;
vazbyte 34:1d3818f8c1a1 241 } else if (countdown1_triggered && !range2_just_triggered) {
vazbyte 29:6ba8491c1dab 242 printf("STEP OUT DETECTED\n");
vazbyte 32:b9306ebceb61 243 hrmCounter = 16;
vazbyte 32:b9306ebceb61 244 hrService->updateHeartRate(hrmCounter);
vazbyte 29:6ba8491c1dab 245 countdown1_triggered = false;
vazbyte 29:6ba8491c1dab 246 }
vazbyte 34:1d3818f8c1a1 247
vazbyte 34:1d3818f8c1a1 248 range2_just_triggered = true;
vazbyte 34:1d3818f8c1a1 249 }
vazbyte 34:1d3818f8c1a1 250 else {
vazbyte 34:1d3818f8c1a1 251 led2 = 1;
vazbyte 34:1d3818f8c1a1 252 range2_just_triggered = false;
vazbyte 27:903ec28ea7a0 253 }
vazbyte 24:931eeb8a70fc 254 } else {
vazbyte 34:1d3818f8c1a1 255 // printf("Range2 [mm]: --\r\n");
vazbyte 24:931eeb8a70fc 256 led2 = 1;
vazbyte 34:1d3818f8c1a1 257 range2_just_triggered = false;
vazbyte 24:931eeb8a70fc 258 }
vazbyte 23:52e8e05df60c 259 }
vazbyte 31:d1ceadbc6c44 260
andresag 22:406127954d1f 261 int main(void)
andresag 22:406127954d1f 262 {
vazbyte 24:931eeb8a70fc 263 range1.init_sensor(range1_addr);
vazbyte 24:931eeb8a70fc 264 range2.init_sensor(range2_addr);
vazbyte 24:931eeb8a70fc 265
andresag 22:406127954d1f 266 BLE& ble = BLE::Instance(BLE::DEFAULT_INSTANCE);
andresag 22:406127954d1f 267 ble.init(bleInitComplete);
andresag 22:406127954d1f 268
vazbyte 23:52e8e05df60c 269 Ticker ticker;
vazbyte 31:d1ceadbc6c44 270 ticker.attach(wakeup_event_cb, 0.1 * TIME_SCALE);
vazbyte 24:931eeb8a70fc 271
vazbyte 23:52e8e05df60c 272 while (ble.hasInitialized()) {
vazbyte 24:931eeb8a70fc 273 ble.waitForEvent();
mbedAustin 2:e84c13abc479 274 }
andresag 20:fcc752d401ec 275 }