main.cpp

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2015 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 #include "mbed.h"
00018 #include "ble/BLE.h"
00019 #include "HeartRateSecService.h"
00020 #include "ble/services/BatteryService.h"
00021 #include "ble/services/DeviceInformationService.h"
00022 
00023 BLE        ble;
00024 DigitalOut led1(LED1);
00025 Serial uart(USBTX, USBRX, 115200);
00026 
00027 const static char     DEVICE_NAME[]        = "DELTA_HRM_SEC";
00028 static const uint16_t uuid16_list[]        = {GattService::UUID_HEART_RATE_SERVICE,
00029                                               GattService::UUID_DEVICE_INFORMATION_SERVICE};
00030 static volatile bool  triggerSensorPolling = false;
00031 bool isSecuritySuccess = false;
00032 
00033 uint8_t hrmCounter = 100; // init HRM to 100bps
00034 
00035 HeartRateSecService         *hrSecService;
00036 DeviceInformationService *deviceInfo;
00037 
00038 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
00039 {
00040     ble.gap().startAdvertising(); // restart advertising
00041 }
00042 
00043 void periodicCallback(void)
00044 {
00045     led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
00046 
00047     /* Note that the periodicCallback() executes in interrupt context, so it is safer to do
00048      * heavy-weight sensor polling from the main thread. */
00049     triggerSensorPolling = true;
00050 }
00051 
00052 void passkeyDisplayCallback(Gap::Handle_t handle, const SecurityManager::Passkey_t passkey)
00053 {
00054     uart.printf("Input passKey: ");
00055     for (unsigned i = 0; i < Gap::ADDR_LEN; i++) {
00056         uart.printf("%c ", passkey[i]);
00057     }
00058     uart.printf("\r\n");
00059 }
00060 
00061 void securitySetupCompletedCallback(Gap::Handle_t handle, SecurityManager::SecurityCompletionStatus_t status)
00062 {
00063     if (status == SecurityManager::SEC_STATUS_SUCCESS) {
00064         uart.printf("Security success\r\n");
00065         isSecuritySuccess = true;
00066     } else {
00067         uart.printf("Security failed\r\n");
00068         isSecuritySuccess = false;
00069         ble.gap().disconnect(Gap::LOCAL_HOST_TERMINATED_CONNECTION);
00070     }
00071 }
00072 
00073 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
00074 {
00075     BLE &ble          = params->ble;
00076     ble_error_t error = params->error;
00077 
00078     if (error != BLE_ERROR_NONE) {
00079         return;
00080     }
00081     
00082     /* Initialize BLE security */
00083     bool enableBonding = true;
00084     bool requireMITM   = true; //Need passkey
00085     uint8_t pKey[6] = {'0', '0', '0', '0', '0', '0'}; //set the passkey
00086     ble.securityManager().init(enableBonding, requireMITM, SecurityManager::IO_CAPS_DISPLAY_ONLY, pKey);
00087 
00088     ble.gap().onDisconnection(disconnectionCallback);
00089     ble.securityManager().onPasskeyDisplay(passkeyDisplayCallback);
00090     ble.securityManager().onSecuritySetupCompleted(securitySetupCompletedCallback);
00091 
00092     /* Setup primary service. */
00093     hrSecService = new HeartRateSecService(ble, hrmCounter, HeartRateSecService::LOCATION_FINGER );
00094 
00095     /* Setup auxiliary service. */
00096     deviceInfo = new DeviceInformationService(ble, "DELTA", "NQ620", "SN1", "hw-rev1", "fw-rev1", "soft-rev1");
00097 
00098     /* Setup advertising. */
00099     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
00100     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
00101     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::GENERIC_HEART_RATE_SENSOR);
00102     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
00103     ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
00104     ble.gap().setAdvertisingInterval(1000); /* 1000ms */
00105     ble.gap().startAdvertising();
00106 }
00107 
00108 int main(void)
00109 {
00110     led1 = 1;
00111     Ticker ticker;
00112     ticker.attach(periodicCallback, 1); // blink LED every second
00113 
00114     ble.init(bleInitComplete);
00115 
00116     /* SpinWait for initialization to complete. This is necessary because the
00117      * BLE object is used in the main loop below. */
00118     while (ble.hasInitialized()  == false) { /* spin loop */ }
00119 
00120     ble.setTxPower(0);
00121     
00122     // infinite loop
00123     while (1) {
00124         // check for trigger from periodicCallback()
00125         if (triggerSensorPolling && ble.getGapState().connected && isSecuritySuccess) {
00126             triggerSensorPolling = false;
00127 
00128             // Do blocking calls or whatever is necessary for sensor polling.
00129             // In our case, we simply update the HRM measurement.
00130             hrmCounter++;
00131             if (hrmCounter == 175) { //  100 <= HRM bps <=175
00132                 hrmCounter = 100;
00133             }
00134 
00135             hrSecService->updateHeartRate(hrmCounter);
00136         } else {
00137             ble.waitForEvent(); // low power wait for event
00138         }
00139     }
00140 }