Fengrui Zuo, Benjamin Leverett, Rahil Ajani, Kombundit Chitranuwatkul
Dependencies: mbed mbed-rtos 4DGL-uLCD-SE SDFileSystem ATParser
main.cpp
- Committer:
- chenchen2020
- Date:
- 2020-04-29
- Revision:
- 6:8a29a9680023
- Parent:
- 5:1fe352831712
File content as of revision 6:8a29a9680023:
#include "mbed.h" #include "rtos.h" #include "ATParser.h" #include "uLCD_4DGL.h" #include "SDFileSystem.h" #include "Speaker.h" //#include "wave_player.h" #include <string> #include <iostream> using namespace std; //General setups DigitalOut cmdMode(p18); Serial pc(USBTX, USBRX); BufferedSerial ble(p13,p14); DigitalOut cmdstuff(p18); DigitalOut greenLED(p24); DigitalOut yellowLED(p25); DigitalOut redLED(p26); uLCD_4DGL uLCD(p28,p27,p30); SDFileSystem sd(p5, p6, p7, p8, "sd"); PwmOut speaker(p21); //DigitalOut speaker_on(p23); //AT command data handlers bool datalogged = 0; //bool changed = 0; char delimiter[] = "\r\n"; int buffer_size = 256; int timeout = 100; bool debug = false; ATParser at(ble, delimiter, buffer_size, timeout, debug); char buffer[10]; volatile int risk_level = 0; //speaker_on = 0; //RTOS Mutex Lock Mutex mutex_lock; time_t seconds; //Global Data points and arrays int averageCount = 0; volatile int RSSI_array[15]; //This portion of the code handles RSSI readings int calculate_average(volatile int *input, int size) { int average; for(int i = 0; i< size; i++) { average = average + input[i]; } average = average/size; return average; } void parse_RSSI() { mutex_lock.lock(); at.send("AT+BLEGETRSSI") && at.read(buffer, 10); if(buffer[0] == '-') { datalogged = 1; pc.printf("RSSI: "); pc.putc(buffer[1]); pc.putc(buffer[2]); pc.printf("\n"); int digit1 = buffer[1] - 48; //Converts char to int int digit2 = buffer[2] - 48; int total = 10*digit1 + digit2; if (averageCount <= 15) { RSSI_array[averageCount] = total; } averageCount++; if(averageCount > 15 && buffer[0] == '-') { averageCount = 0; int average = calculate_average(RSSI_array, 15); if(average < 55) { risk_level = 3; } else if(average > 55 && average < 70) { risk_level = 2; } else if(average > 70 && average < 90) { risk_level = 1; } else { risk_level = 0; } } pc.printf("Risk level: "); pc.printf("%i\n", risk_level); } else { pc.printf("Disconnected\n"); datalogged = 0; } mutex_lock.unlock(); } void speaker_alarm() { while(1) { if(risk_level == 2 && datalogged) { for (int i=0; i<10; i=i+2) { speaker.period(1.0/969.0); speaker = float(i)/50.0; wait(.8); speaker.period(1.0/800.0); wait(.8); speaker = 0; } } else if(risk_level == 3 && datalogged) { for (int i=0; i<26; i=i+2) { speaker.period(1.0/969.0); speaker = float(i)/50.0; wait(.25); speaker.period(1.0/800.0); wait(.25); speaker = 0; } } else if(risk_level <= 1 && datalogged) { speaker = 0; } else { speaker = 0; } } } void log_sd_card() { while(1) { mutex_lock.lock(); FILE *fp = fopen("/sd/mydir/sdtest.txt", "w"); if(fp == NULL) { error("Could not open file for write\n"); } int curr_time = (int)ctime(&seconds) % 86400; int curr_hour = curr_time / 3600; int curr_min = curr_time / 60; int curr_sec = curr_time % 60; fprintf(fp, "Date & time: Tuesday 28, April 2020 "); fprintf(fp, "%i", curr_hour); fprintf(fp, ":"); fprintf(fp, "%i", curr_min); fprintf(fp, ":"); fprintf(fp, "%i", curr_sec); fprintf(fp, "\n"); fprintf(fp, "Risk Level: "); fprintf(fp, "%i", risk_level); fprintf(fp, "\n"); for (int i = 0; i < 15; i++) { fprintf(fp, "%i", RSSI_array[i]); if (i < 14) { fprintf(fp, ", "); } } fprintf(fp, "\n\n"); fclose(fp); mutex_lock.unlock(); } } void blink_leds() { while(1) { if(risk_level <= 1 && datalogged) { greenLED = 1; redLED = 0; yellowLED = 0; } else if(risk_level == 2 && datalogged) { yellowLED = 1; greenLED = 0; redLED = 0; } else if(risk_level == 3 && datalogged) { redLED = 1; yellowLED = 0; greenLED = 0; } else { redLED = 0; yellowLED = 0; greenLED = 0; } } } void display_ulcd() { mutex_lock.lock(); uLCD.color(WHITE); mutex_lock.unlock(); while(1) { mutex_lock.lock(); if(risk_level <= 1 && datalogged) { mutex_lock.lock(); uLCD.cls(); uLCD.locate(5, 7); uLCD.text_width(2); uLCD.text_height(2); uLCD.background_color(GREEN); uLCD.textbackground_color(GREEN); uLCD.printf("Safe"); mutex_lock.unlock(); } else if(risk_level == 2 && datalogged) { mutex_lock.lock(); uLCD.cls(); uLCD.locate(1, 7); uLCD.text_width(2); uLCD.text_height(2); uLCD.background_color(0xFFFF00); uLCD.textbackground_color(0xFFFF00); uLCD.printf("Cautious"); mutex_lock.unlock(); } else if(risk_level == 3 && datalogged) { mutex_lock.lock(); uLCD.cls(); uLCD.locate(3, 7); uLCD.text_width(2); uLCD.text_height(2); uLCD.background_color(RED); uLCD.textbackground_color(RED); uLCD.printf("Hazard"); mutex_lock.unlock(); } mutex_lock.unlock(); } } int main() { cmdstuff = 1; at.send("AT") && at.recv("OK"); at.send("AT+AB ChangeDefaultBaud [9600]", 3) && at.recv("OK"); pc.baud(9600); ble.baud(9600); Thread SD_Thread(); Thread ULCD_Thread(display_ulcd); Thread LED_Thread(blink_leds); Thread Speaker_Thread(speaker_alarm); while(1) { parse_RSSI(); } }