A template for applications where some small amount of data needs to be notified to a phone app over BLE. It is a good starting point for notifications.
Dependencies: BLE_API mbed nRF51822
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 "ble/BLE.h" 00019 #include "ButtonService.h" 00020 00021 DigitalOut led1(LED1); 00022 InterruptIn button(BUTTON1); 00023 00024 const static char DEVICE_NAME[] = "Button"; 00025 static const uint16_t uuid16_list[] = {ButtonService::BUTTON_SERVICE_UUID}; 00026 00027 enum { 00028 RELEASED = 0, 00029 PRESSED, 00030 IDLE 00031 }; 00032 static uint8_t buttonState = IDLE; 00033 00034 static ButtonService *buttonServicePtr; 00035 00036 void buttonPressedCallback(void) 00037 { 00038 /* Note that the buttonPressedCallback() executes in interrupt context, so it is safer to access 00039 * BLE device API from the main thread. */ 00040 buttonState = PRESSED; 00041 } 00042 00043 void buttonReleasedCallback(void) 00044 { 00045 /* Note that the buttonReleasedCallback() executes in interrupt context, so it is safer to access 00046 * BLE device API from the main thread. */ 00047 buttonState = RELEASED; 00048 } 00049 00050 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params) 00051 { 00052 BLE::Instance().gap().startAdvertising(); 00053 } 00054 00055 void periodicCallback(void) 00056 { 00057 led1 = !led1; /* Do blinky on LED1 to indicate system aliveness. */ 00058 } 00059 00060 /** 00061 * This function is called when the ble initialization process has failled 00062 */ 00063 void onBleInitError(BLE &ble, ble_error_t error) 00064 { 00065 /* Initialization error handling should go here */ 00066 } 00067 00068 /** 00069 * Callback triggered when the ble initialization process has finished 00070 */ 00071 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params) 00072 { 00073 BLE& ble = params->ble; 00074 ble_error_t error = params->error; 00075 00076 if (error != BLE_ERROR_NONE) { 00077 /* In case of error, forward the error handling to onBleInitError */ 00078 onBleInitError(ble, error); 00079 return; 00080 } 00081 00082 /* Ensure that it is the default instance of BLE */ 00083 if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) { 00084 return; 00085 } 00086 00087 ble.gap().onDisconnection(disconnectionCallback); 00088 00089 /* Setup primary service */ 00090 buttonServicePtr = new ButtonService(ble, false /* initial value for button pressed */); 00091 00092 /* setup advertising */ 00093 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); 00094 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list)); 00095 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); 00096 ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); 00097 ble.gap().setAdvertisingInterval(1000); /* 1000ms. */ 00098 ble.gap().startAdvertising(); 00099 00100 } 00101 00102 int main(void) 00103 { 00104 led1 = 1; 00105 Ticker ticker; 00106 ticker.attach(periodicCallback, 1); 00107 button.fall(buttonPressedCallback); 00108 button.rise(buttonReleasedCallback); 00109 00110 BLE &ble = BLE::Instance(); 00111 ble.init(bleInitComplete); 00112 00113 /* SpinWait for initialization to complete. This is necessary because the 00114 * BLE object is used in the main loop below. */ 00115 while (ble.hasInitialized() == false) { /* spin loop */ } 00116 00117 while (true) { 00118 if (buttonState != IDLE) { 00119 buttonServicePtr->updateButtonState(buttonState); 00120 buttonState = IDLE; 00121 } 00122 00123 ble.waitForEvent(); 00124 } 00125 }
Generated on Wed Jul 13 2022 23:09:25 by 1.7.2