SmartD / mbed_BLEtry3

works

Dependencies:   BLE_nRF8001 DebounceIn mbed mbed_BLEtry2

Fork of mbed_BLEfinal by SmartD

main.cpp@0:11e1f075d0d2, 2015-03-31 (annotated)

Committer:
sitakumar
Date:
Tue Mar 31 20:39:50 2015 +0000
Revision:
0:11e1f075d0d2
Child:
1:d356fed1a9fa
3/31

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sitakumar 0:11e1f075d0d2 1 #include "mbed.h"
sitakumar 0:11e1f075d0d2 2 #include "BLEPeripheral.h"
sitakumar 0:11e1f075d0d2 3
sitakumar 0:11e1f075d0d2 4 //serial connection via USB
sitakumar 0:11e1f075d0d2 5 Serial serial(USBTX, USBRX);
sitakumar 0:11e1f075d0d2 6
sitakumar 0:11e1f075d0d2 7 //Declare Input and Output pins
sitakumar 0:11e1f075d0d2 8 DigitalIn pb(D3);
sitakumar 0:11e1f075d0d2 9 AnalogIn pH_sensor(A0);
sitakumar 0:11e1f075d0d2 10 InterruptIn button(D2);
sitakumar 0:11e1f075d0d2 11 DigitalOut led(LED_RED);
sitakumar 0:11e1f075d0d2 12
sitakumar 0:11e1f075d0d2 13 // The SPI construct, REQN and RDYN IO construct should be modified manually
sitakumar 0:11e1f075d0d2 14 // It depend on the board you are using and the REQN&RDYN configuration on BLE Shield
sitakumar 0:11e1f075d0d2 15 SPI spi(PTD2, PTD3, PTD1);
sitakumar 0:11e1f075d0d2 16 DigitalInOut BLE_RDY(PTD5);
sitakumar 0:11e1f075d0d2 17 DigitalInOut BLE_REQ(PTD0);
sitakumar 0:11e1f075d0d2 18 DigitalInOut BLE_RESET(PTA13);
sitakumar 0:11e1f075d0d2 19
sitakumar 0:11e1f075d0d2 20 //for BLE
sitakumar 0:11e1f075d0d2 21 int count = 0;
sitakumar 0:11e1f075d0d2 22 unsigned char txbuf[16] = {0};
sitakumar 0:11e1f075d0d2 23 unsigned char txlen = 0;
sitakumar 0:11e1f075d0d2 24
sitakumar 0:11e1f075d0d2 25 /*----- BLE Utility -------------------------------------------------------------------------*/
sitakumar 0:11e1f075d0d2 26 // create peripheral instance, see pinouts above
sitakumar 0:11e1f075d0d2 27 BLEPeripheral blePeripheral = BLEPeripheral(&BLE_REQ, &BLE_RDY, NULL);
sitakumar 0:11e1f075d0d2 28
sitakumar 0:11e1f075d0d2 29 // create service
sitakumar 0:11e1f075d0d2 30 BLEService uartService = BLEService("713d0000503e4c75ba943148f18d941e");
sitakumar 0:11e1f075d0d2 31
sitakumar 0:11e1f075d0d2 32 // create characteristic
sitakumar 0:11e1f075d0d2 33 //BLECharacteristic txCharacteristic = BLECharacteristic("713d0002503e4c75ba943148f18d941e", BLENotify, 20);
sitakumar 0:11e1f075d0d2 34 BLECharacteristic rxCharacteristic = BLECharacteristic("713d0003503e4c75ba943148f18d941e", BLENotify, 20);
sitakumar 0:11e1f075d0d2 35 /*--------------------------------------------------------------------------------------------*/
sitakumar 0:11e1f075d0d2 36
sitakumar 0:11e1f075d0d2 37 unsigned int interval = 0;
sitakumar 0:11e1f075d0d2 38 unsigned char count_on = 0;
sitakumar 0:11e1f075d0d2 39
sitakumar 0:11e1f075d0d2 40 //for pH measurement
sitakumar 0:11e1f075d0d2 41 int calib = 0;
sitakumar 0:11e1f075d0d2 42 int avgReading = 0;
sitakumar 0:11e1f075d0d2 43 bool calibrationORnot = true;
sitakumar 0:11e1f075d0d2 44 bool ready = false;
sitakumar 0:11e1f075d0d2 45 int* reading[] = {0,0};
sitakumar 0:11e1f075d0d2 46
sitakumar 0:11e1f075d0d2 47
sitakumar 0:11e1f075d0d2 48 //This loop takes a reading by taking 15 measurements and averaging them when it is called in the loop "measure"
sitakumar 0:11e1f075d0d2 49 int takeReading()
sitakumar 0:11e1f075d0d2 50 {
sitakumar 0:11e1f075d0d2 51 double totalVal = 0.0;
sitakumar 0:11e1f075d0d2 52 double pH_sensor_read = 0.0;
sitakumar 0:11e1f075d0d2 53 int totalReadings = 0;
sitakumar 0:11e1f075d0d2 54 while(totalReadings < 16){
sitakumar 0:11e1f075d0d2 55 pH_sensor_read = pH_sensor.read();
sitakumar 0:11e1f075d0d2 56 totalVal = totalVal + pH_sensor_read;
sitakumar 0:11e1f075d0d2 57 totalReadings++;
sitakumar 0:11e1f075d0d2 58 }
sitakumar 0:11e1f075d0d2 59 int avgSensor = totalVal/15;
sitakumar 0:11e1f075d0d2 60 return avgSensor;
sitakumar 0:11e1f075d0d2 61 }
sitakumar 0:11e1f075d0d2 62
sitakumar 0:11e1f075d0d2 63 void calibration()
sitakumar 0:11e1f075d0d2 64 {
sitakumar 0:11e1f075d0d2 65 serial.printf("enter calibration loop\n");
sitakumar 0:11e1f075d0d2 66 //Loop to take calibration value
sitakumar 0:11e1f075d0d2 67 calib = takeReading();
sitakumar 0:11e1f075d0d2 68 serial.printf("calib is %d\n", calib);
sitakumar 0:11e1f075d0d2 69 }
sitakumar 0:11e1f075d0d2 70
sitakumar 0:11e1f075d0d2 71 void calculate()
sitakumar 0:11e1f075d0d2 72 {
sitakumar 0:11e1f075d0d2 73 serial.printf("entered calc\n");
sitakumar 0:11e1f075d0d2 74 //Take average of readings over 10 seconds
sitakumar 0:11e1f075d0d2 75 avgReading = takeReading();
sitakumar 0:11e1f075d0d2 76 serial.printf("took reading\n");
sitakumar 0:11e1f075d0d2 77 ready = true;
sitakumar 0:11e1f075d0d2 78 }
sitakumar 0:11e1f075d0d2 79
sitakumar 0:11e1f075d0d2 80 void measure()
sitakumar 0:11e1f075d0d2 81 {
sitakumar 0:11e1f075d0d2 82 serial.baud(115200);
sitakumar 0:11e1f075d0d2 83 serial.printf("start measurement");
sitakumar 0:11e1f075d0d2 84 //cb.mode(PullUp);
sitakumar 0:11e1f075d0d2 85 if(calibrationORnot)
sitakumar 0:11e1f075d0d2 86 {
sitakumar 0:11e1f075d0d2 87 calibration();
sitakumar 0:11e1f075d0d2 88 calibrationORnot = !calibrationORnot;
sitakumar 0:11e1f075d0d2 89 }
sitakumar 0:11e1f075d0d2 90 //Loop to take measurement
sitakumar 0:11e1f075d0d2 91 else if(!calibrationORnot)
sitakumar 0:11e1f075d0d2 92 {
sitakumar 0:11e1f075d0d2 93 serial.printf("enter measurement loop\n");
sitakumar 0:11e1f075d0d2 94 serial.printf("calib is %d\n", calib);
sitakumar 0:11e1f075d0d2 95 calculate();
sitakumar 0:11e1f075d0d2 96 }
sitakumar 0:11e1f075d0d2 97 }
sitakumar 0:11e1f075d0d2 98
sitakumar 0:11e1f075d0d2 99
sitakumar 0:11e1f075d0d2 100 int main()
sitakumar 0:11e1f075d0d2 101 {
sitakumar 0:11e1f075d0d2 102 pb.mode(PullUp);
sitakumar 0:11e1f075d0d2 103 serial.baud(115200);
sitakumar 0:11e1f075d0d2 104 serial.printf("Hello SmartD!\n");
sitakumar 0:11e1f075d0d2 105 serial.printf("Serial begin!\r\n");
sitakumar 0:11e1f075d0d2 106 int pH,yint,tempC,tempF;
sitakumar 0:11e1f075d0d2 107
sitakumar 0:11e1f075d0d2 108 /*----- BLE Utility ---------------------------------------------*/
sitakumar 0:11e1f075d0d2 109 // set advertised local name and service UUID
sitakumar 0:11e1f075d0d2 110 blePeripheral.setLocalName("Sita");
sitakumar 0:11e1f075d0d2 111
sitakumar 0:11e1f075d0d2 112 blePeripheral.setAdvertisedServiceUuid(uartService.uuid());
sitakumar 0:11e1f075d0d2 113
sitakumar 0:11e1f075d0d2 114 // add service and characteristic
sitakumar 0:11e1f075d0d2 115 blePeripheral.addAttribute(uartService);
sitakumar 0:11e1f075d0d2 116 blePeripheral.addAttribute(rxCharacteristic);
sitakumar 0:11e1f075d0d2 117 //blePeripheral.addAttribute(txCharacteristic);
sitakumar 0:11e1f075d0d2 118
sitakumar 0:11e1f075d0d2 119 // begin initialization
sitakumar 0:11e1f075d0d2 120 blePeripheral.begin();
sitakumar 0:11e1f075d0d2 121 /*---------------------------------------------------------------*/
sitakumar 0:11e1f075d0d2 122
sitakumar 0:11e1f075d0d2 123 //serial.printf("GOT IT pH is %d, Temp is %d\n\r", reading[0], reading[1]);
sitakumar 0:11e1f075d0d2 124 serial.printf("BLE UART Peripheral begin!\r\n");
sitakumar 0:11e1f075d0d2 125 if (calibrationORnot)
sitakumar 0:11e1f075d0d2 126 {
sitakumar 0:11e1f075d0d2 127 button.rise(&measure);
sitakumar 0:11e1f075d0d2 128 }
sitakumar 0:11e1f075d0d2 129
sitakumar 0:11e1f075d0d2 130 while(1)
sitakumar 0:11e1f075d0d2 131 {
sitakumar 0:11e1f075d0d2 132 //serial.printf("GOT IT pH is %d, Temp is %d\n\r", reading[0], reading[1]);
sitakumar 0:11e1f075d0d2 133 BLECentral central = blePeripheral.central();
sitakumar 0:11e1f075d0d2 134 if (ready)
sitakumar 0:11e1f075d0d2 135 {
sitakumar 0:11e1f075d0d2 136 //calcuating yintercept of the ADC -> pH equation using calibration value and given that calibration liquid is pH4
sitakumar 0:11e1f075d0d2 137 yint = (68.97*calib)-4;
sitakumar 0:11e1f075d0d2 138 serial.printf("yint is %f", yint);
sitakumar 0:11e1f075d0d2 139 //assumes linear relationship between pin readout -> voltage ->pH
sitakumar 0:11e1f075d0d2 140 pH = (0.0209*3300)*(avgReading)-yint;
sitakumar 0:11e1f075d0d2 141 //conversion to degrees C from sensor output voltage
sitakumar 0:11e1f075d0d2 142 tempC = (((3000*avgReading/1000) - 1.022129)/-0.0018496);
sitakumar 0:11e1f075d0d2 143 tempF = (tempC *9/5) + 32;
sitakumar 0:11e1f075d0d2 144 //print current pH and temp
sitakumar 0:11e1f075d0d2 145 serial.printf("pH = %5.2d & temp = %5.2d F\n\r", pH, tempF);
sitakumar 0:11e1f075d0d2 146 ready = !ready;
sitakumar 0:11e1f075d0d2 147 }
sitakumar 0:11e1f075d0d2 148 if (central)
sitakumar 0:11e1f075d0d2 149 {
sitakumar 0:11e1f075d0d2 150 // central connected to peripheral
sitakumar 0:11e1f075d0d2 151 serial.printf("Connected to central\r\n");
sitakumar 0:11e1f075d0d2 152 while (central.connected())
sitakumar 0:11e1f075d0d2 153 {
sitakumar 0:11e1f075d0d2 154 if (!pb) // if button pushed
sitakumar 0:11e1f075d0d2 155 {
sitakumar 0:11e1f075d0d2 156 serial.printf("pH is %d, Temp is %d\n\r", pH, tempF);
sitakumar 0:11e1f075d0d2 157 // Read and send out pH value from measure function
sitakumar 0:11e1f075d0d2 158 //unsigned int value = pH;
sitakumar 0:11e1f075d0d2 159 // serial.printf("VALUE IS %d\n\r", value);
sitakumar 0:11e1f075d0d2 160 // const unsigned char val[1] = {value};
sitakumar 0:11e1f075d0d2 161 // serial.printf("VALUE AFTER IS %d\n\r", val[1]);
sitakumar 0:11e1f075d0d2 162 // rxCharacteristic.setValue(val,1);
sitakumar 0:11e1f075d0d2 163 unsigned int value2 = tempF;
sitakumar 0:11e1f075d0d2 164 serial.printf("VALUE FIRST IS %d\n\r", value2);
sitakumar 0:11e1f075d0d2 165 const unsigned char val2[1] = {value2};
sitakumar 0:11e1f075d0d2 166 serial.printf("VALUE AFTER IS %d\n\r", val2[1]);
sitakumar 0:11e1f075d0d2 167 rxCharacteristic.setValue(val2,1);
sitakumar 0:11e1f075d0d2 168
sitakumar 0:11e1f075d0d2 169 }
sitakumar 0:11e1f075d0d2 170 }
sitakumar 0:11e1f075d0d2 171
sitakumar 0:11e1f075d0d2 172 // central disconnected
sitakumar 0:11e1f075d0d2 173 serial.printf("Disconnected from central\r\n");
sitakumar 0:11e1f075d0d2 174 }
sitakumar 0:11e1f075d0d2 175 }
sitakumar 0:11e1f075d0d2 176 }