workss
Dependencies: mbed BLE_API nRF51822 VL53L0X
main.cpp
- Committer:
- vazbyte
- Date:
- 2019-03-16
- Revision:
- 38:7035f67d8105
- Parent:
- 37:5792986fea5d
- Child:
- 39:067ba1a475a5
File content as of revision 38:7035f67d8105:
#include <stdio.h> #include <math.h> #include "mbed.h" #include "ble/BLE.h" #include "VL53L0X.h" #include "ble/services/HeartRateService.h" #define range1_addr (0x56) #define range2_addr (0x60) #define range1_XSHUT p15 #define range2_XSHUT p16 #define VL53L0_I2C_SDA p30 #define VL53L0_I2C_SCL p7 #define TIME_SCALE 3 // sensors activated every 100ms * TIME_SCALE = 0.3 seconds #define DIST_MIN 0 #define DIST_MAX 22 //#define TIMESTAMP_FREQ 3000 // PROD: time granularity is 100ms * TIMESTAMP_FREQ = 5 minutes #define TIMESTAMP_FREQ 300 // DEV: time granularity is 100ms * TIMESTAMP_FREQ = 30 seconds //#define MAX_TIME 1728000 // PROD: keep track of 100ms * MAX_TIME = 2880 minutes = 2 days #define MAX_TIME 172800 // DEV: keep track of 100ms * MAX_TIME = 288 minutes = 4.8 hours Serial pc(USBTX, USBRX); static DevI2C devI2c(VL53L0_I2C_SDA, VL53L0_I2C_SCL); DigitalOut led1(LED1); DigitalOut led2(LED2); DigitalOut led(LED3, 1); uint16_t customServiceUUID = 0xA000; uint16_t readCharUUID = 0xA001; uint16_t writeCharUUID = 0xA002; static DigitalOut shutdown1_pin(range1_XSHUT); static VL53L0X range1(&devI2c, &shutdown1_pin, NC); static DigitalOut shutdown2_pin(range2_XSHUT); static VL53L0X range2(&devI2c, &shutdown2_pin, NC); uint32_t distance1, distance2; int dist1, dist2, status1, status2; int packet_queue[4000] = {0}; int packet_queue_index = 0; const static int cw = 20 / TIME_SCALE; const static int time_cycle = TIMESTAMP_FREQ / TIME_SCALE; const static int maximum_time = MAX_TIME / TIMESTAMP_FREQ; int countdown = cw; bool countdown1_triggered = false, countdown2_triggered = false; bool step_in = false, step_out = false; bool range1_just_triggered = false, range2_just_triggered = false; bool master_connected = false; const static char DEVICE_NAME[] = "OCCUPY-CRICHTON-ST"; static const uint16_t uuid16_list[] = {GattService::UUID_HEART_RATE_SERVICE}; int * encoded_array; int timestamp = time_cycle, current_time = 0; HeartRateService *hrService; uint8_t hrmCounter = 0; int format_dist(int distance) { int result; if (distance > 2550) result = 255; else result = distance/10; return result; } void dec_to_bin(int decimal, int bin[]) { int temp; // encoding little-endian for (int i = 10; i >= 0; i--) { temp = decimal >> i; bin[i] = temp&1; } } int bin_to_dec(int binary) { int rem, temp, dec = 0, b = 1; temp = binary; while (temp > 0) { rem = temp % 10; dec = dec + rem * b; b *= 2; temp /= 10; } return dec; } void encode_bin(int direction, int time, int encoding[]) { time = time % maximum_time; int bin_timestamp[11] = {0}; dec_to_bin(time, bin_timestamp); // for checking transmission errors: // sending as 2 messages; designating them with 0 (1st part) and 1 (2nd part) encoding [8] = 1; encoding [0] = 0; // used to send the current time when Bluetooth connection established if (direction == -1) { encoding[15] = 1; encoding[7] = 1; } else { encoding[15] = 0; encoding[7] = 0; // to distinguish whether movement was IN (1) or OUT (0) if (direction == 1) { encoding[1] = 1; } else { encoding[1] = 0; } } if (!master_connected) { int count = 10; for (int i = 14; i >= 2; i--) { if (i == 8 || i == 7) { } else { encoding[i] = bin_timestamp[count]; count--; } } } } void create_packets(int encoding[], double& packet1, double& packet2) { double binary1 = 0, binary2 = 0; for (int i = 0; i < 8; i++) { binary1 += encoding[i] * pow(10, (double)i); binary2 += encoding[8+i] * pow(10, (double)i); } packet1 = bin_to_dec(binary1); packet2 = bin_to_dec(binary2); } void send_packet(int direction, int time) { int encoding [16] = {0}; encode_bin(direction, time, encoding); double packet1, packet2; create_packets(encoding, packet1, packet2); int p1 = (int)packet1; int p2 = (int)packet2; hrmCounter = p1; hrService->updateHeartRate(hrmCounter); printf("sent packet %i\n", p1); hrmCounter = p2; hrService->updateHeartRate(hrmCounter); printf("sent packet %i\n", p2); } void send_packet_from_queue(int current_index) { double packet1 = packet_queue[current_index]; double packet2 = packet_queue[current_index + 1]; int p1 = (int)packet1; int p2 = (int)packet2; hrmCounter = p1; hrService->updateHeartRate(hrmCounter); printf("sent packet %i\n", p1); hrmCounter = p2; hrService->updateHeartRate(hrmCounter); printf("sent packet %i\n", p2); } void enqueue_packet(int direction, int time, int queue[]) { int encoding [16] = {0}; encode_bin(direction, time, encoding); double packet1, packet2; create_packets(encoding, packet1, packet2); int p1 = (int)packet1; int p2 = (int)packet2; packet_queue[packet_queue_index] = p1; printf("enqueued packet %i\n", p1); packet_queue[packet_queue_index + 1] = p2; printf("enqueued packet %i\n", p2); ::packet_queue_index += 2; } void connectionCallback(const Gap::ConnectionCallbackParams_t *) { printf("Bluetooth connected at %i\n", current_time); ::master_connected = true; send_packet(-1, current_time); int current_index = 0; while (current_index < packet_queue_index) { send_packet_from_queue(current_index); current_index += 2; } ::packet_queue_index = 0; } void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *) { printf("Bluetooth disconnected at %i\n", current_time); ::master_connected = false; ::timestamp = 1; BLE::Instance(BLE::DEFAULT_INSTANCE).gap().startAdvertising(); } void bleInitComplete(BLE::InitializationCompleteCallbackContext *params) { BLE &ble = params->ble; ble_error_t error = params->error; if (error != BLE_ERROR_NONE) { return; } ble.gap().onConnection(connectionCallback); ble.gap().onDisconnection(disconnectionCallback); hrService = new HeartRateService(ble, hrmCounter, HeartRateService::LOCATION_FINGER); ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list)); ble.gap().setAdvertisingInterval(100); ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::GENERIC_HEART_RATE_SENSOR); ble.gap().startAdvertising(); } void wakeup_event_cb() { led != led; ::timestamp++; ::current_time = timestamp / time_cycle; if (countdown1_triggered) { countdown--; if (countdown == 0) { countdown1_triggered = false; } } if (countdown2_triggered) { countdown--; if (countdown == 0) { countdown2_triggered = false; } } status1 = range1.get_distance(&distance1); status2 = range2.get_distance(&distance2); dist1 = format_dist(distance1); dist2 = format_dist(distance2); if (status1 == VL53L0X_ERROR_NONE) { // printf("Range1 [mm]: %6ld\r\n", dist1); if (dist1 > DIST_MIN && dist1 < DIST_MAX) { led1 = 0; if (!countdown1_triggered && !countdown2_triggered) { countdown1_triggered = true; countdown = cw; } else if (countdown2_triggered && !range1_just_triggered) { printf("STEP IN DETECTED\n"); if (master_connected) { send_packet(1, 0); } else { enqueue_packet(1, current_time, packet_queue); } // hrmCounter = 1; // hrService->updateHeartRate(hrmCounter); countdown2_triggered = false; } range1_just_triggered = true; } else { led1 = 1; range1_just_triggered = false; } } else { // printf("Range1 [mm]: --\r\n"); led1 = 1; range2_just_triggered = false; } if (status2 == VL53L0X_ERROR_NONE) { // printf("Range2 [mm]: %6ld\r\n", dist2); if (dist2 > DIST_MIN && dist2 < DIST_MAX) { led2 = 0; if (!countdown1_triggered && !countdown2_triggered) { countdown2_triggered = true; countdown = cw; } else if (countdown1_triggered && !range2_just_triggered) { printf("STEP OUT DETECTED\n"); if (master_connected) { send_packet(1, 0); } else { enqueue_packet(1, current_time, packet_queue); } // hrmCounter = 16; // hrService->updateHeartRate(hrmCounter); countdown1_triggered = false; } range2_just_triggered = true; } else { led2 = 1; range2_just_triggered = false; } } else { // printf("Range2 [mm]: --\r\n"); led2 = 1; range2_just_triggered = false; } } int main(void) { range1.init_sensor(range1_addr); range2.init_sensor(range2_addr); BLE& ble = BLE::Instance(BLE::DEFAULT_INSTANCE); ble.init(bleInitComplete); Ticker ticker; ticker.attach(wakeup_event_cb, 0.1 * TIME_SCALE); while (ble.hasInitialized()) { ble.waitForEvent(); } }