main.cpp

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2013 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 "BLEDevice.h"
00019 #include "HeartRateSecSampleSrv.h"
00020 #include "DeviceInformationService.h"
00021 
00022 /* Enable the following if you need to throttle the connection interval. This has
00023  * the effect of reducing energy consumption after a connection is made;
00024  * particularly for applications where the central may want a fast connection
00025  * interval.*/
00026 #define UPDATE_PARAMS_FOR_LONGER_CONNECTION_INTERVAL 0
00027 
00028 BLEDevice  ble;
00029 DigitalOut led1(LED1);
00030 
00031 const static char     DEVICE_NAME[]        = "HRM_SEC";
00032 static const uint16_t uuid16_list[]        = {GattService::UUID_HEART_RATE_SERVICE,
00033                                               GattService::UUID_DEVICE_INFORMATION_SERVICE};
00034 static volatile bool  triggerSensorPolling = false;
00035 
00036 void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
00037 {
00038     printf("Disconnected!\r\n");
00039     ble.startAdvertising(); // restart advertising
00040 }
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 
00053 void connectionCallback(Gap::Handle_t handle, Gap::addr_type_t peerAddrType, const Gap::Address_t peerAddr,
00054                                               Gap::addr_type_t ownAddrType,  const Gap::Address_t ownAddr,
00055                                               const Gap::ConnectionParams_t * pParam)
00056 {
00057     printf("Connected!\r\n");
00058 }
00059 
00060 
00061 void passkeyDisplayCallback(Gap::Handle_t handle, const Gap::Passkey_t passkey)
00062 {
00063     uint8_t i;
00064     
00065     printf("Input passKey: ");
00066     for(i = 0; i < 6; i++) {
00067         printf("%c ", passkey[i]);
00068     }
00069     printf("\r\n");
00070 }
00071 
00072 
00073 void securitySetupCompletedCallback(Gap::Handle_t handle, Gap::SecurityCompletionStatus_t status)
00074 {
00075     if(!status) {
00076         printf("Security success\r\n", status);
00077     } else {
00078         printf("Security failed\r\n", status);
00079     }
00080 }
00081 
00082 
00083 int main(void)
00084 {
00085     led1 = 1;
00086     Ticker ticker;
00087     ticker.attach(periodicCallback, 1); // blink LED every second
00088     printf("Started\r\n");
00089     
00090     /* Initialize BLE module */
00091     ble.init();
00092     
00093     /* Initialize BLE security */
00094     ble.initializeSecurity(true, true, Gap::IO_CAPS_DISPLAY_ONLY, NULL);
00095     
00096     /* Set callback functions */
00097     ble.onConnection(connectionCallback);
00098     ble.onDisconnection(disconnectionCallback);
00099     ble.onPasskeyDisplay(passkeyDisplayCallback);
00100     ble.onSecuritySetupCompleted(securitySetupCompletedCallback);
00101     
00102     /* Setup primary service. */
00103     uint8_t hrmCounter = 100; // init HRM to 100bps
00104     HeartRateSecService hrService(ble, hrmCounter, HeartRateSecService::LOCATION_FINGER );
00105 
00106     /* Setup auxiliary service. */
00107     DeviceInformationService deviceInfo(ble, "ARM", "Model1", "SN1", "hw-rev1", "fw-rev1", "soft-rev1");
00108 
00109     /* Setup advertising. */
00110     ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
00111     ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
00112     ble.accumulateAdvertisingPayload(GapAdvertisingData::GENERIC_HEART_RATE_SENSOR);
00113     ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
00114     ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
00115     ble.setAdvertisingInterval(1000);
00116     
00117     ble.startAdvertising();
00118 
00119     // infinite loop
00120     while (1) {
00121         // check for trigger from periodicCallback()
00122         if (triggerSensorPolling && ble.getGapState().connected) {
00123             triggerSensorPolling = false;
00124 
00125             // Do blocking calls or whatever is necessary for sensor polling.
00126             // In our case, we simply update the HRM measurement. 
00127             hrmCounter++;
00128             
00129             //  100 <= HRM bps <=175
00130             if (hrmCounter == 175) {
00131                 hrmCounter = 100;
00132             }
00133             
00134             // update bps
00135             hrService.updateHeartRate(hrmCounter);
00136         } else {
00137             ble.waitForEvent(); // low power wait for event
00138         }
00139     }
00140 }