Diff: source/main.cpp

Revision:

0:ed0152b5c495

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/main.cpp	Mon Sep 19 00:59:11 2016 +0000
@@ -0,0 +1,308 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifdef YOTTA_CFG_MBED_OS  // use minar on mbed OS
+#   include "mbed-drivers/mbed.h"
+#else
+#   include "mbed.h"
+#endif
+
+#include "ble/BLE.h"
+#include "EddystoneService.h"
+
+#include "PersistentStorageHelper/ConfigParamsPersistence.h"
+#include "stdio.h"
+
+// Instantiation of the main event loop for this program
+
+#ifdef YOTTA_CFG_MBED_OS  // use minar on mbed OS
+#   include "EventQueue/EventQueueMinar.h"
+    typedef eq::EventQueueMinar event_queue_t;
+
+#else      // otherwise use the event classic queue
+#   include "EventQueue/EventQueueClassic.h"
+    typedef eq::EventQueueClassic<
+        /* event count */ 10
+    > event_queue_t;
+
+#endif
+
+static event_queue_t eventQueue;
+
+EddystoneService *eddyServicePtr;
+
+/* Duration after power-on that config service is available. */
+static const int CONFIG_ADVERTISEMENT_TIMEOUT_SECONDS = EDDYSTONE_DEFAULT_CONFIG_ADVERTISEMENT_TIMEOUT_SECONDS;
+
+/* Values for ADV packets related to firmware levels, calibrated based on measured values at 1m */
+static const PowerLevels_t advTxPowerLevels = EDDYSTONE_DEFAULT_ADV_TX_POWER_LEVELS;
+/* Values for radio power levels, provided by manufacturer. */
+static const PowerLevels_t radioTxPowerLevels = EDDYSTONE_DEFAULT_RADIO_TX_POWER_LEVELS;
+
+DigitalOut configLED(CONFIG_LED, LED_OFF);
+
+static const int BLINKY_MSEC = 500;                       // How long to cycle config LED on/off
+static event_queue_t::event_handle_t handle = 0;         // For the config mode timeout
+static event_queue_t::event_handle_t BlinkyHandle = 0;   // For the blinking LED when in config mode
+
+static void blinky(void)  { configLED = !configLED; }
+
+static void configLED_on(void) {
+    configLED = !LED_OFF;
+    BlinkyHandle = eventQueue.post_every(blinky, BLINKY_MSEC);
+}
+
+static void configLED_off(void) {
+    configLED = LED_OFF;
+    if (BlinkyHandle) {
+        eventQueue.cancel(BlinkyHandle);
+        BlinkyHandle = NULL;
+    }
+}
+
+/**
+ * Callback triggered some time after application started to switch to beacon mode.
+ */
+static void timeoutToStartEddystoneBeaconAdvertisements(void)
+{
+    Gap::GapState_t state;
+    state = BLE::Instance().gap().getState();
+    if (!state.connected) { /* don't switch if we're in a connected state. */
+        eddyServicePtr->startEddystoneBeaconAdvertisements();
+        configLED_off();
+    }
+}
+
+/**
+ * Callback triggered for a connection event.
+ */
+static void connectionCallback(const Gap::ConnectionCallbackParams_t *cbParams)
+{
+    (void) cbParams;
+    // Stop advertising whatever the current mode
+    eddyServicePtr->stopEddystoneBeaconAdvertisements();
+}
+
+/**
+ * Callback triggered for a disconnection event.
+ */
+static void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *cbParams)
+{
+    (void) cbParams;
+    BLE::Instance().gap().startAdvertising();
+    // Save params in persistent storage
+    EddystoneService::EddystoneParams_t params;
+    eddyServicePtr->getEddystoneParams(params);
+    saveEddystoneServiceConfigParams(&params);
+    // Ensure LED is off at the end of Config Mode or during a connection
+    configLED_off();
+    // 0.5 Second callback to rapidly re-establish Beaconing Service
+    // (because it needs to be executed outside of disconnect callback)
+    eventQueue.post_in(timeoutToStartEddystoneBeaconAdvertisements, 500 /* ms */);
+}
+
+// This section defines a simple push button handler to enter config or shutdown the beacon
+// Only compiles if "reset_button" is set in config.json in the "platform" section
+//
+#ifdef RESET_BUTTON
+
+InterruptIn button(RESET_BUTTON);
+DigitalOut shutdownLED(SHUTDOWN_LED, LED_OFF);
+
+static void shutdownLED_on(void) { shutdownLED = !LED_OFF; }
+static void shutdownLED_off(void) { shutdownLED = LED_OFF; }
+
+static int beaconIsOn = 1;                          // Button handler boolean to switch on or off
+static int buttonBusy;                              // semaphore to make prevent switch bounce problems
+
+static void freeButtonBusy(void) { buttonBusy = false; }
+
+// Callback used to handle button presses from thread mode (not IRQ)
+static void button_task(void) {
+    eventQueue.cancel(handle);   // kill any pending callback tasks
+
+    if (beaconIsOn) {
+        beaconIsOn = 0;
+        eddyServicePtr->stopEddystoneBeaconAdvertisements();
+        configLED_off();    // just in case it's still running...
+        shutdownLED_on();   // Flash shutdownLED to let user know we're turning off
+        eventQueue.post_in(shutdownLED_off, 1000);
+    } else {
+
+        beaconIsOn = 1;
+        eddyServicePtr->startEddystoneConfigAdvertisements();
+        configLED_on();
+        handle = eventQueue.post_in(
+            timeoutToStartEddystoneBeaconAdvertisements,
+            CONFIG_ADVERTISEMENT_TIMEOUT_SECONDS * 1000 /* ms */
+        );
+    }
+    eventQueue.post_in(freeButtonBusy, 750 /* ms */);
+}
+
+/**
+ * Raw IRQ handler for the reset button. We don't want to actually do any work here.
+ * Instead, we queue work to happen later using an event queue, by posting a callback.
+ * This has the added avantage of serialising actions, so if the button press happens
+ * during the config->beacon mode transition timeout, the button_task won't happen
+ * until the previous task has finished.
+ *
+ * If your buttons aren't debounced, you should do this in software, or button_task
+ * might get queued multiple times.
+ */
+static void reset_rise(void)
+{
+    if (!buttonBusy) {
+        buttonBusy = true;
+        eventQueue.post(button_task);
+    }
+}
+#endif
+
+static void onBleInitError(BLE::InitializationCompleteCallbackContext* initContext)
+{
+    /* Initialization error handling goes here... */
+    (void) initContext;
+}
+
+
+static void bleInitComplete(BLE::InitializationCompleteCallbackContext* initContext)
+{
+    BLE         &ble  = initContext->ble;
+    ble_error_t error = initContext->error;
+
+    if (error != BLE_ERROR_NONE) {
+        onBleInitError(initContext);
+        return;
+    }
+
+    ble.gap().onDisconnection(disconnectionCallback);
+
+    ble.gap().onConnection(connectionCallback);
+
+    EddystoneService::EddystoneParams_t params;
+    
+    wait_ms(35); // Allow the RNG number generator to collect data
+
+    // Determine if booting directly after re-Flash or not
+    if (loadEddystoneServiceConfigParams(&params)) {
+        // 2+ Boot after reflash, so get parms from Persistent Storage
+        eddyServicePtr = new EddystoneService(ble, params, radioTxPowerLevels, eventQueue);
+    } else {
+        // 1st Boot after reflash, so reset everything to defaults
+        /* NOTE: slots are initialized in the constructor from the config.json file */
+        eddyServicePtr = new EddystoneService(ble, advTxPowerLevels, radioTxPowerLevels, eventQueue);
+    }
+
+    // Save Default params in persistent storage ready for next boot event
+    eddyServicePtr->getEddystoneParams(params);
+    saveEddystoneServiceConfigParams(&params);
+    // Start the Eddystone Config service - This will never stop (only connectability will change)
+    eddyServicePtr->startEddystoneConfigService();
+
+    /* Start Eddystone config Advertizements (to initialize everything properly) */
+    configLED_on();
+    eddyServicePtr->startEddystoneConfigAdvertisements();
+    handle = eventQueue.post_in(
+        timeoutToStartEddystoneBeaconAdvertisements,
+        CONFIG_ADVERTISEMENT_TIMEOUT_SECONDS * 1000 /* ms */
+    );
+
+   // now shut everything off (used for final beacon that ships w/ battery)
+#ifdef RESET_BUTTON
+   eventQueue.post_in(button_task, 2000 /* ms */);
+#endif
+}
+
+void app_start(int, char *[])
+{
+
+#ifdef NO_LOGGING
+    /* Tell standard C library to not allocate large buffers for these streams */
+    setbuf(stdout, NULL);
+    setbuf(stderr, NULL);
+    setbuf(stdin, NULL);
+#endif
+
+#ifndef NO_4SEC_START_DELAY
+    // delay ~4secs before starting to allow time the nRF51 hardware to settle
+    // Also allows time to attach a virtual terimal to read logging output during init
+    wait_ms(4000);
+#endif
+    
+#ifdef RESET_BUTTON
+    beaconIsOn = 1;             // Booting up, initialize for button handler
+    buttonBusy = false;         // software debouncing of the reset button
+    button.rise(&reset_rise);   // setup reset button
+#endif
+
+    BLE &ble = BLE::Instance();
+    ble.init(bleInitComplete);
+}
+
+#if !defined(YOTTA_CFG_MBED_OS)
+
+void scheduleBleEventsProcessing(BLE::OnEventsToProcessCallbackContext* context) {
+    eventQueue.post(&BLE::processEvents, &context->ble);
+    }
+
+int main() {
+
+    BLE &ble = BLE::Instance();
+    ble.onEventsToProcess(scheduleBleEventsProcessing);
+
+    app_start(0, NULL);
+
+    while (true) {
+       eventQueue.dispatch();
+    }
+
+    return 0;
+}
+
+// *WARNING* HACK
+// avoid unecessary code to be pulled in,
+// should be fixed by mbed-os latter
+extern "C" {
+
+#if defined(TOOLCHAIN_GCC_ARM) || defined(TOOLCHAIN_GCC_CR)
+void exit(int) {
+    while(true) {
+    }
+}
+#endif
+
+int __aeabi_atexit(void *object, void (*dtor)(void* /*this*/), void *handle) {
+    return 0;
+}
+
+int __cxa_atexit(void (*dtor)(void* /*this*/), void *object, void *handle) {
+    return 0;
+}
+
+void __register_exitproc() {
+}
+
+void __call_exitprocs(int, void *f) {
+}
+
+void __cxa_finalize(void *handle) {
+}
+
+}
+
+
+#endif