Mathias Giacomuzzi / Mbed OS mbed-os-example-ble-UartService

Tests for BLE Uart Service

Fork of mbed-os-example-ble-HeartRate by mbed-os-examples

source/main.cpp@25:1bd8d5cc86ef, 2017-05-05 (annotated)

Committer:
Mathias Giacomuzzi
Date:
Fri May 05 11:24:34 2017 +0200
Revision:
25:1bd8d5cc86ef
Parent:
10:ac3615194d04 
"update Example to working UART Service"

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Mathias Giacomuzzi 25:1bd8d5cc86ef 1 /* mbed Microcontroller Library
Mathias Giacomuzzi 25:1bd8d5cc86ef 2 * Copyright (c) 2006-2015 ARM Limited
Mathias Giacomuzzi 25:1bd8d5cc86ef 3 *
Mathias Giacomuzzi 25:1bd8d5cc86ef 4 * Licensed under the Apache License, Version 2.0 (the "License");
Mathias Giacomuzzi 25:1bd8d5cc86ef 5 * you may not use this file except in compliance with the License.
Mathias Giacomuzzi 25:1bd8d5cc86ef 6 * You may obtain a copy of the License at
Mathias Giacomuzzi 25:1bd8d5cc86ef 7 *
Mathias Giacomuzzi 25:1bd8d5cc86ef 8 * http://www.apache.org/licenses/LICENSE-2.0
Mathias Giacomuzzi 25:1bd8d5cc86ef 9 *
Mathias Giacomuzzi 25:1bd8d5cc86ef 10 * Unless required by applicable law or agreed to in writing, software
Mathias Giacomuzzi 25:1bd8d5cc86ef 11 * distributed under the License is distributed on an "AS IS" BASIS,
Mathias Giacomuzzi 25:1bd8d5cc86ef 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Mathias Giacomuzzi 25:1bd8d5cc86ef 13 * See the License for the specific language governing permissions and
Mathias Giacomuzzi 25:1bd8d5cc86ef 14 * limitations under the License.
Mathias Giacomuzzi 25:1bd8d5cc86ef 15 */
Mathias Giacomuzzi 25:1bd8d5cc86ef 16
Mathias Giacomuzzi 25:1bd8d5cc86ef 17 #include <events/mbed_events.h>
Mathias Giacomuzzi 25:1bd8d5cc86ef 18 #include <mbed.h>
Mathias Giacomuzzi 25:1bd8d5cc86ef 19 #include "ble/BLE.h"
Mathias Giacomuzzi 25:1bd8d5cc86ef 20 #include "ble/Gap.h"
Mathias Giacomuzzi 25:1bd8d5cc86ef 21 #include "ble/services/UARTService.h"
Mathias Giacomuzzi 25:1bd8d5cc86ef 22
Mathias Giacomuzzi 25:1bd8d5cc86ef 23 #define NEED_CONSOLE_OUTPUT 1 /* Set this if you need debug messages on the console;
Mathias Giacomuzzi 25:1bd8d5cc86ef 24 * it will have an impact on code-size and power consumption. */
Mathias Giacomuzzi 25:1bd8d5cc86ef 25
Mathias Giacomuzzi 25:1bd8d5cc86ef 26 #if NEED_CONSOLE_OUTPUT
Mathias Giacomuzzi 25:1bd8d5cc86ef 27 #define DEBUG(STR) { if (uartServicePtr) uartServicePtr->write(STR, strlen(STR)); }
Mathias Giacomuzzi 25:1bd8d5cc86ef 28 #else
Mathias Giacomuzzi 25:1bd8d5cc86ef 29 #define DEBUG(...) /* nothing */
Mathias Giacomuzzi 25:1bd8d5cc86ef 30 #endif /* #if NEED_CONSOLE_OUTPUT */
Mathias Giacomuzzi 25:1bd8d5cc86ef 31
Mathias Giacomuzzi 25:1bd8d5cc86ef 32 DigitalOut led1(LED1, 1);
Mathias Giacomuzzi 25:1bd8d5cc86ef 33
Mathias Giacomuzzi 25:1bd8d5cc86ef 34 const static char DEVICE_NAME[] = "BLE UART";
Mathias Giacomuzzi 25:1bd8d5cc86ef 35
Mathias Giacomuzzi 25:1bd8d5cc86ef 36 static uint8_t hrmCounter = 100; // init HRM to 100bps
Mathias Giacomuzzi 25:1bd8d5cc86ef 37 static UARTService *uartServicePtr;
Mathias Giacomuzzi 25:1bd8d5cc86ef 38
Mathias Giacomuzzi 25:1bd8d5cc86ef 39 static EventQueue eventQueue(
Mathias Giacomuzzi 25:1bd8d5cc86ef 40 /* event count */ 16 * /* event size */ 32
Mathias Giacomuzzi 25:1bd8d5cc86ef 41 );
Mathias Giacomuzzi 25:1bd8d5cc86ef 42
Mathias Giacomuzzi 25:1bd8d5cc86ef 43 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
Mathias Giacomuzzi 25:1bd8d5cc86ef 44 {
Mathias Giacomuzzi 25:1bd8d5cc86ef 45 BLE::Instance().gap().startAdvertising(); // restart advertising
Mathias Giacomuzzi 25:1bd8d5cc86ef 46 }
Mathias Giacomuzzi 25:1bd8d5cc86ef 47
Mathias Giacomuzzi 25:1bd8d5cc86ef 48 void updateSensorValue()
Mathias Giacomuzzi 25:1bd8d5cc86ef 49 {
Mathias Giacomuzzi 25:1bd8d5cc86ef 50 char buffer[5];
Mathias Giacomuzzi 25:1bd8d5cc86ef 51
Mathias Giacomuzzi 25:1bd8d5cc86ef 52 // Do blocking calls or whatever is necessary for sensor polling.
Mathias Giacomuzzi 25:1bd8d5cc86ef 53 // In our case, we simply update the HRM measurement.
Mathias Giacomuzzi 25:1bd8d5cc86ef 54 hrmCounter++;
Mathias Giacomuzzi 25:1bd8d5cc86ef 55
Mathias Giacomuzzi 25:1bd8d5cc86ef 56 // 100 <= HRM bps <=175
Mathias Giacomuzzi 25:1bd8d5cc86ef 57 if (hrmCounter == 175) {
Mathias Giacomuzzi 25:1bd8d5cc86ef 58 hrmCounter = 100;
Mathias Giacomuzzi 25:1bd8d5cc86ef 59 }
Mathias Giacomuzzi 25:1bd8d5cc86ef 60
Mathias Giacomuzzi 25:1bd8d5cc86ef 61 sniprintf(buffer, 5, "%d\n\r", hrmCounter);
Mathias Giacomuzzi 25:1bd8d5cc86ef 62 DEBUG(buffer);
Mathias Giacomuzzi 25:1bd8d5cc86ef 63 printf("update hrmCounter: %s\n\r", buffer);
Mathias Giacomuzzi 25:1bd8d5cc86ef 64 }
Mathias Giacomuzzi 25:1bd8d5cc86ef 65
Mathias Giacomuzzi 25:1bd8d5cc86ef 66 void periodicCallback(void)
Mathias Giacomuzzi 25:1bd8d5cc86ef 67 {
Mathias Giacomuzzi 25:1bd8d5cc86ef 68 led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
Mathias Giacomuzzi 25:1bd8d5cc86ef 69
Mathias Giacomuzzi 25:1bd8d5cc86ef 70 if (BLE::Instance().getGapState().connected) {
Mathias Giacomuzzi 25:1bd8d5cc86ef 71 eventQueue.call(updateSensorValue);
Mathias Giacomuzzi 25:1bd8d5cc86ef 72 }
Mathias Giacomuzzi 25:1bd8d5cc86ef 73 }
Mathias Giacomuzzi 25:1bd8d5cc86ef 74
Mathias Giacomuzzi 25:1bd8d5cc86ef 75 void onBleInitError(BLE &ble, ble_error_t error)
Mathias Giacomuzzi 25:1bd8d5cc86ef 76 {
Mathias Giacomuzzi 25:1bd8d5cc86ef 77 (void)ble;
Mathias Giacomuzzi 25:1bd8d5cc86ef 78 (void)error;
Mathias Giacomuzzi 25:1bd8d5cc86ef 79 /* Initialization error handling should go here */
Mathias Giacomuzzi 25:1bd8d5cc86ef 80 }
Mathias Giacomuzzi 25:1bd8d5cc86ef 81
Mathias Giacomuzzi 25:1bd8d5cc86ef 82 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
Mathias Giacomuzzi 25:1bd8d5cc86ef 83 {
Mathias Giacomuzzi 25:1bd8d5cc86ef 84 BLE& ble = params->ble;
Mathias Giacomuzzi 25:1bd8d5cc86ef 85 ble_error_t error = params->error;
Mathias Giacomuzzi 25:1bd8d5cc86ef 86
Mathias Giacomuzzi 25:1bd8d5cc86ef 87 if (error != BLE_ERROR_NONE) {
Mathias Giacomuzzi 25:1bd8d5cc86ef 88 onBleInitError(ble, error);
Mathias Giacomuzzi 25:1bd8d5cc86ef 89 return;
Mathias Giacomuzzi 25:1bd8d5cc86ef 90 }
Mathias Giacomuzzi 25:1bd8d5cc86ef 91
Mathias Giacomuzzi 25:1bd8d5cc86ef 92 if (ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
Mathias Giacomuzzi 25:1bd8d5cc86ef 93 return;
Mathias Giacomuzzi 25:1bd8d5cc86ef 94 }
Mathias Giacomuzzi 25:1bd8d5cc86ef 95
Mathias Giacomuzzi 25:1bd8d5cc86ef 96 ble.gap().onDisconnection(disconnectionCallback);
Mathias Giacomuzzi 25:1bd8d5cc86ef 97
Mathias Giacomuzzi 25:1bd8d5cc86ef 98 /* Setup primary service. */
Mathias Giacomuzzi 25:1bd8d5cc86ef 99 uartServicePtr = new UARTService(ble);
Mathias Giacomuzzi 25:1bd8d5cc86ef 100
Mathias Giacomuzzi 25:1bd8d5cc86ef 101 /* Setup advertising. */
Mathias Giacomuzzi 25:1bd8d5cc86ef 102 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
Mathias Giacomuzzi 25:1bd8d5cc86ef 103 ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
Mathias Giacomuzzi 25:1bd8d5cc86ef 104 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
Mathias Giacomuzzi 25:1bd8d5cc86ef 105
Mathias Giacomuzzi 25:1bd8d5cc86ef 106 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS, (uint8_t *)UARTServiceUUID_reversed, sizeof(UARTServiceUUID_reversed));
Mathias Giacomuzzi 25:1bd8d5cc86ef 107
Mathias Giacomuzzi 25:1bd8d5cc86ef 108 ble.gap().setAdvertisingInterval(100); /* 100ms */
Mathias Giacomuzzi 25:1bd8d5cc86ef 109 ble.gap().startAdvertising();
Mathias Giacomuzzi 25:1bd8d5cc86ef 110 }
Mathias Giacomuzzi 25:1bd8d5cc86ef 111
Mathias Giacomuzzi 25:1bd8d5cc86ef 112 void scheduleBleEventsProcessing(BLE::OnEventsToProcessCallbackContext* context) {
Mathias Giacomuzzi 25:1bd8d5cc86ef 113 BLE &ble = BLE::Instance();
Mathias Giacomuzzi 25:1bd8d5cc86ef 114 eventQueue.call(Callback<void()>(&ble, &BLE::processEvents));
Mathias Giacomuzzi 25:1bd8d5cc86ef 115 }
Mathias Giacomuzzi 25:1bd8d5cc86ef 116
Mathias Giacomuzzi 25:1bd8d5cc86ef 117 int main()
Mathias Giacomuzzi 25:1bd8d5cc86ef 118 {
Mathias Giacomuzzi 25:1bd8d5cc86ef 119 eventQueue.call_every(100, periodicCallback);
Mathias Giacomuzzi 25:1bd8d5cc86ef 120
Mathias Giacomuzzi 25:1bd8d5cc86ef 121 BLE &ble = BLE::Instance();
Mathias Giacomuzzi 25:1bd8d5cc86ef 122 ble.onEventsToProcess(scheduleBleEventsProcessing);
Mathias Giacomuzzi 25:1bd8d5cc86ef 123 ble.init(bleInitComplete);
Mathias Giacomuzzi 25:1bd8d5cc86ef 124
Mathias Giacomuzzi 25:1bd8d5cc86ef 125 printf("Start up...\n\r");
Mathias Giacomuzzi 25:1bd8d5cc86ef 126
Mathias Giacomuzzi 25:1bd8d5cc86ef 127 eventQueue.dispatch_forever();
Mathias Giacomuzzi 25:1bd8d5cc86ef 128
Mathias Giacomuzzi 25:1bd8d5cc86ef 129 return 0;
Mathias Giacomuzzi 25:1bd8d5cc86ef 130 }