ArmfulKST / Mbed 2 deprecated BLE_LED_ADC_BBC

LED and ADC service for the BBC Microbit

Dependencies:   AES BLE_API mbed nRF51822 smallAES

main.cpp@0:21352e62003f, 2018-02-14 (annotated)

Committer:
f3d
Date:
Wed Feb 14 19:18:44 2018 +0000
Revision:
0:21352e62003f
Extension of the BLE ADC program which now includes an ADC service

Who changed what in which revision?

UserRevisionLine numberNew contents of line
f3d 0:21352e62003f 1 /* mbed Microcontroller Library
f3d 0:21352e62003f 2 * Copyright (c) 2006-2013 ARM Limited
f3d 0:21352e62003f 3 *
f3d 0:21352e62003f 4 * Licensed under the Apache License, Version 2.0 (the "License");
f3d 0:21352e62003f 5 * you may not use this file except in compliance with the License.
f3d 0:21352e62003f 6 * You may obtain a copy of the License at
f3d 0:21352e62003f 7 *
f3d 0:21352e62003f 8 * http://www.apache.org/licenses/LICENSE-2.0
f3d 0:21352e62003f 9 *
f3d 0:21352e62003f 10 * Unless required by applicable law or agreed to in writing, software
f3d 0:21352e62003f 11 * distributed under the License is distributed on an "AS IS" BASIS,
f3d 0:21352e62003f 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
f3d 0:21352e62003f 13 * See the License for the specific language governing permissions and
f3d 0:21352e62003f 14 * limitations under the License.
f3d 0:21352e62003f 15 */
f3d 0:21352e62003f 16
f3d 0:21352e62003f 17 #include "mbed.h"
f3d 0:21352e62003f 18 #include "ble/BLE.h"
f3d 0:21352e62003f 19 #include "LEDService.h"
f3d 0:21352e62003f 20 #include "ADCService.h"
f3d 0:21352e62003f 21
f3d 0:21352e62003f 22 /*
f3d 0:21352e62003f 23 * All the LEDs on the micro:bit are part of the LED Matrix,
f3d 0:21352e62003f 24 * In order to get simple blinking behaviour, we set column 0
f3d 0:21352e62003f 25 * to be permanently at ground. If you want to use the LEDs as
f3d 0:21352e62003f 26 * a screen, there is a display driver in the micro:bit 'DAL',
f3d 0:21352e62003f 27 */
f3d 0:21352e62003f 28 DigitalOut col1(P0_4, 0);
f3d 0:21352e62003f 29 DigitalOut alivenessLED(P0_13, 0);
f3d 0:21352e62003f 30 DigitalOut actuatedLED(P0_14, 0);
f3d 0:21352e62003f 31 AnalogIn ADC(P0_3);
f3d 0:21352e62003f 32 uint16_t ADCResult=0;
f3d 0:21352e62003f 33 const static char DEVICE_NAME[] = "BBC_LED";
f3d 0:21352e62003f 34 static const uint16_t uuid16_list[] = {LEDService::LED_SERVICE_UUID,ADCService::ADC_SERVICE_UUID};
f3d 0:21352e62003f 35
f3d 0:21352e62003f 36 LEDService *ledServicePtr;
f3d 0:21352e62003f 37 ADCService *ADCServicePtr;
f3d 0:21352e62003f 38 Ticker ticker;
f3d 0:21352e62003f 39
f3d 0:21352e62003f 40 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
f3d 0:21352e62003f 41 {
f3d 0:21352e62003f 42 BLE::Instance().gap().startAdvertising();
f3d 0:21352e62003f 43 }
f3d 0:21352e62003f 44
f3d 0:21352e62003f 45 void periodicCallback(void)
f3d 0:21352e62003f 46 {
f3d 0:21352e62003f 47 alivenessLED = !alivenessLED; /* Do blinky on LED1 to indicate system aliveness. */
f3d 0:21352e62003f 48 }
f3d 0:21352e62003f 49
f3d 0:21352e62003f 50 /**
f3d 0:21352e62003f 51 * This callback allows the LEDService to receive updates to the ledState Characteristic.
f3d 0:21352e62003f 52 *
f3d 0:21352e62003f 53 * @param[in] params
f3d 0:21352e62003f 54 * Information about the characterisitc being updated.
f3d 0:21352e62003f 55 */
f3d 0:21352e62003f 56 void onDataWrittenCallback(const GattWriteCallbackParams *params) {
f3d 0:21352e62003f 57 if ((params->handle == ledServicePtr->getValueHandle()) && (params->len == 1)) {
f3d 0:21352e62003f 58 actuatedLED = *(params->data);
f3d 0:21352e62003f 59 }
f3d 0:21352e62003f 60 }
f3d 0:21352e62003f 61
f3d 0:21352e62003f 62 void onDataReadCallback(const GattReadCallbackParams *params) {
f3d 0:21352e62003f 63 ADCResult=ADC.read_u16();
f3d 0:21352e62003f 64 }
f3d 0:21352e62003f 65 /**
f3d 0:21352e62003f 66 * This function is called when the ble initialization process has failed
f3d 0:21352e62003f 67 */
f3d 0:21352e62003f 68 void onBleInitError(BLE &ble, ble_error_t error)
f3d 0:21352e62003f 69 {
f3d 0:21352e62003f 70 /* Initialization error handling should go here */
f3d 0:21352e62003f 71 }
f3d 0:21352e62003f 72
f3d 0:21352e62003f 73 /**
f3d 0:21352e62003f 74 * Callback triggered when the ble initialization process has finished
f3d 0:21352e62003f 75 */
f3d 0:21352e62003f 76 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
f3d 0:21352e62003f 77 {
f3d 0:21352e62003f 78 BLE& ble = params->ble;
f3d 0:21352e62003f 79 ble_error_t error = params->error;
f3d 0:21352e62003f 80
f3d 0:21352e62003f 81 if (error != BLE_ERROR_NONE) {
f3d 0:21352e62003f 82 /* In case of error, forward the error handling to onBleInitError */
f3d 0:21352e62003f 83 onBleInitError(ble, error);
f3d 0:21352e62003f 84 return;
f3d 0:21352e62003f 85 }
f3d 0:21352e62003f 86
f3d 0:21352e62003f 87 /* Ensure that it is the default instance of BLE */
f3d 0:21352e62003f 88 if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
f3d 0:21352e62003f 89 return;
f3d 0:21352e62003f 90 }
f3d 0:21352e62003f 91
f3d 0:21352e62003f 92 ble.gap().onDisconnection(disconnectionCallback);
f3d 0:21352e62003f 93 ble.gattServer().onDataWritten(onDataWrittenCallback);
f3d 0:21352e62003f 94 ble.gattServer().onDataRead(onDataReadCallback);
f3d 0:21352e62003f 95
f3d 0:21352e62003f 96 bool initialValueForLEDCharacteristic = false;
f3d 0:21352e62003f 97 ledServicePtr = new LEDService(ble, initialValueForLEDCharacteristic);
f3d 0:21352e62003f 98 ADCServicePtr = new ADCService(ble,ADCResult);
f3d 0:21352e62003f 99
f3d 0:21352e62003f 100 /* setup advertising */
f3d 0:21352e62003f 101 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
f3d 0:21352e62003f 102 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
f3d 0:21352e62003f 103 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
f3d 0:21352e62003f 104 ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
f3d 0:21352e62003f 105 ble.gap().setAdvertisingInterval(1000); /* 1000ms. */
f3d 0:21352e62003f 106 ble.gap().startAdvertising();
f3d 0:21352e62003f 107 }
f3d 0:21352e62003f 108
f3d 0:21352e62003f 109 int main(void)
f3d 0:21352e62003f 110 {
f3d 0:21352e62003f 111 ticker.attach(periodicCallback, 1); /* Blink LED every second */
f3d 0:21352e62003f 112
f3d 0:21352e62003f 113 BLE &ble = BLE::Instance();
f3d 0:21352e62003f 114 ble.init(bleInitComplete);
f3d 0:21352e62003f 115
f3d 0:21352e62003f 116 /* SpinWait for initialization to complete. This is necessary because the
f3d 0:21352e62003f 117 * BLE object is used in the main loop below. */
f3d 0:21352e62003f 118 while (ble.hasInitialized() == false) { /* spin loop */ }
f3d 0:21352e62003f 119
f3d 0:21352e62003f 120 while (true) {
f3d 0:21352e62003f 121 ble.waitForEvent();
f3d 0:21352e62003f 122 ADCResult=ADC.read_u16();
f3d 0:21352e62003f 123 ADCServicePtr->updateADCValue(ADCResult);
f3d 0:21352e62003f 124
f3d 0:21352e62003f 125 }
f3d 0:21352e62003f 126 }