main.cpp

00001 /**
00002  * Interactive Device Design, Fall 2014
00003  * Homework 5 - Wind and Window controller
00004  * Nordic nrf51822 Board
00005  *
00006  * Ian Shain
00007  * Doug Cook
00008  * Kiyana Salkeld
00009  * Elizabeth Lin
00010  *
00011  */
00012 
00013 #include "mbed.h"
00014 #include "BLEDevice.h"
00015 #include "HealthThermometerService.h"
00016 #include "UARTService.h"
00017 #include <string>
00018 
00019 BLEDevice  ble;
00020 DigitalOut led1(LED1);
00021 DigitalOut led2(LED2);
00022 
00023 UARTService *uartServicePtr;
00024 
00025 Serial kl25z(P0_9, P0_11); // P0_9 (gray) -> TX, P0_11 (purple) -> RX
00026 
00027 void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
00028 {
00029     kl25z.putc('h');
00030     kl25z.putc('f');
00031     ble.startAdvertising();
00032 }
00033 
00034 void onDataWritten(const GattCharacteristicWriteCBParams *params)
00035 {
00036     if ((uartServicePtr != NULL) && (params->charHandle == uartServicePtr->getTXCharacteristicHandle())) {
00037         uint16_t bytesRead = params->len;
00038         if (bytesRead <= 1) {
00039             kl25z.putc('c');
00040         } else {
00041             kl25z.putc('d');
00042         }
00043         ble.updateCharacteristicValue(uartServicePtr->getRXCharacteristicHandle(), params->data, bytesRead);
00044     }
00045 }
00046 
00047 bool updateWindAdvertisement = false;
00048 
00049 void periodicCallback(void)
00050 {
00051     led1 = !led1;
00052     updateWindAdvertisement = true;
00053 }
00054 
00055 bool newMessage = false;
00056 string measurement = "";
00057 void callback() {
00058     newMessage = true;
00059     measurement += kl25z.getc();
00060 }
00061 
00062 int main(void)
00063 {
00064     led1 = 1;
00065     Ticker ticker;
00066     ticker.attach(periodicCallback, 1);
00067     
00068     kl25z.baud(9600);
00069     kl25z.format(8,Serial::Odd,1);
00070     kl25z.attach(callback);
00071 
00072     //pc.printf("Initialising the nRF51822\n\r");
00073     kl25z.putc('e');
00074     ble.init();
00075     ble.onDisconnection(disconnectionCallback);
00076     ble.onDataWritten(onDataWritten);
00077     
00078     HealthThermometerService thermometerService(ble, 0, HealthThermometerService::LOCATION_EAR);
00079 
00080     /* setup advertising */
00081     ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED);
00082     ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
00083     ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME,
00084                                      (const uint8_t *)"AlloyWindow", sizeof("AlloyWindow") - 1);
00085     ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS,
00086                                      (const uint8_t *)UARTServiceUUID_reversed, sizeof(UARTServiceUUID_reversed));
00087 
00088     ble.setAdvertisingInterval(160); /* 100ms; in multiples of 0.625ms. */
00089     ble.startAdvertising();
00090 
00091     UARTService uartService(ble);
00092     uartServicePtr = &uartService;
00093 
00094     while (true) {
00095         if (newMessage) {
00096             led2 = !led2;   // data receiver notification
00097             // broadcast wind speed value
00098             thermometerService.updateTemperature(atoi(measurement.c_str()));
00099             measurement = "";
00100             newMessage = false;
00101         } else {
00102             ble.waitForEvent();
00103         }
00104     }
00105 }