Revision 0:8c76e25a3cff, committed 2018-11-29

Comitter:

vicara

Date:

Thu Nov 29 18:32:03 2018 +0000

Commit message:

Modify the BLE LED Control so that it; toggles the LED on the other board only if; you keep the button pressed

Changed in this revision

diff -r 000000000000 -r 8c76e25a3cff mbed-os.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Thu Nov 29 18:32:03 2018 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#bf6f2c3c6434a6de9eb9511feffa5948b3d1f20f

diff -r 000000000000 -r 8c76e25a3cff mbed_app.json
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed_app.json	Thu Nov 29 18:32:03 2018 +0000
@@ -0,0 +1,16 @@
+{
+    "target_overrides": {
+        "K64F": {
+            "target.features_add": ["BLE"],
+            "target.extra_labels_add": ["CORDIO", "CORDIO_BLUENRG"]
+        },
+        "NUCLEO_F401RE": {
+            "target.features_add": ["BLE"],
+            "target.extra_labels_add": ["CORDIO", "CORDIO_BLUENRG"]
+        },
+        "DISCO_L475VG_IOT01A": {
+            "target.features_add": ["BLE"],
+            "target.extra_labels_add": ["CORDIO", "CORDIO_BLUENRG"]
+        }
+    }
+}

diff -r 000000000000 -r 8c76e25a3cff module.json
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/module.json	Thu Nov 29 18:32:03 2018 +0000
@@ -0,0 +1,15 @@
+{
+  "name": "ble-ledblinker",
+  "version": "0.0.1",
+  "description": "An initial demo showcasing the GattClient APIs. Drives an LED service exported by a BLE_LED peripheral. Shows scanning, connections, service-discovery, and reads/writes.",
+  "licenses": [
+    {
+      "url": "https://spdx.org/licenses/Apache-2.0",
+      "type": "Apache-2.0"
+    }
+  ],
+  "dependencies": {
+    "ble": "^2.0.0"
+  },
+  "bin": "./source"
+}

diff -r 000000000000 -r 8c76e25a3cff readme.md
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/readme.md	Thu Nov 29 18:32:03 2018 +0000
@@ -0,0 +1,54 @@
+# BLE LED Blinker
+
+This example demonstrates using the ``GattClient`` API to control BLE client devices.
+
+The example uses two applications running on two different devices:
+
+1. The first device - the central - runs the application ``BLE_LEDBlinker`` from this repository. This application sends an on/off toggle over BLE.
+
+1. The second device - the peripheral - runs the application [``BLE_LED``](https://github.com/ARMmbed/mbed-os-example-ble/tree/master/BLE_LED) to respond to the toggle.
+
+	The toggle simply turns the LED on the peripheral device on and off.
+
+# Running the application
+
+## Requirements
+
+Hardware requirements are in the [main readme](https://github.com/ARMmbed/mbed-os-example-ble/blob/master/README.md).
+
+This example requires *two* devices.
+
+## Building instructions
+
+You will need to build both applications and flash each one to a different board.
+
+Please note: The application ``BLE_LEDBlinker`` in this repository initiate a connection to all ble devices which advertise "LED" as complete local name. By default, the application `BLE_LED` advertise "LED" as complete local name. If you change the local name advertised by the application `BLE_LED` you should reflect your change in this application by changing the value of the constant `PEER_NAME` in `main.cpp`.
+
+**Tip:** You may notice that the application also checks the LED characteristic's UUID; you don't need to change this parameter's value, because it already matches the UUID provided by the second application, ``BLE_LED``.
+
+Building instructions for all mbed OS samples are in the [main readme](https://github.com/ARMmbed/mbed-os-example-ble/blob/master/README.md).
+
+## Checking for success
+
+1. Build both applications and install one on each device, as explained in the building instructions.
+
+1. The LED number two of the device running ``BLE_LED`` should blink.
+
+
+## Monitoring the application through a serial port
+
+You can run ``BLE_LEDBlinker`` and see that it works properly by monitoring its serial output.
+
+You need a terminal program to listen to the output through a serial port. You can download one, for example:
+
+* Tera Term for Windows.
+* CoolTerm for Mac OS X.
+* GNU Screen for Linux.
+
+To see the application's output:
+
+1. Check which serial port your device is connected to.
+1. Run a terminal program with the correct serial port and set the baud rate to 9600. For example, to use GNU Screen, run: ``screen /dev/tty.usbmodem1412 9600``.
+1. The application should start printing the toggle's value to the terminal.
+
+**Note:** ``BLE_LEDBlinker`` will not run properly if the ``BLE_LED`` application is not running on a second device. The terminal will show a few print statements, but you will not be able to see the application in full operation.

diff -r 000000000000 -r 8c76e25a3cff shields/TARGET_CORDIO_BLUENRG.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/shields/TARGET_CORDIO_BLUENRG.lib	Thu Nov 29 18:32:03 2018 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/cordio-ble-x-nucleo-idb0xa1/#5e49580a0303c48c11f78ad2e5d92b5ffc02aadc

diff -r 000000000000 -r 8c76e25a3cff source/main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/main.cpp	Thu Nov 29 18:32:03 2018 +0000
@@ -0,0 +1,211 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2015 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.
+ */
+
+#include <events/mbed_events.h>
+#include <mbed.h>
+#include "ble/BLE.h"
+#include "ble/DiscoveredCharacteristic.h"
+#include "ble/DiscoveredService.h"
+
+DigitalOut alivenessLED(LED1, 1);
+static DiscoveredCharacteristic ledCharacteristic;
+static bool triggerLedCharacteristic;
+static const char PEER_NAME[] = "LED_RED";
+InterruptIn button(USER_BUTTON);
+static uint8_t toggledValue = 0x0;
+
+static EventQueue eventQueue(/* event count */ 16 * EVENTS_EVENT_SIZE);
+
+void periodicCallback(void) {
+    alivenessLED = !alivenessLED; /* Do blinky on LED1 while we're waiting for BLE events */
+}
+
+void advertisementCallback(const Gap::AdvertisementCallbackParams_t *params) {
+    // parse the advertising payload, looking for data type COMPLETE_LOCAL_NAME
+    // The advertising payload is a collection of key/value records where
+    // byte 0: length of the record excluding this byte
+    // byte 1: The key, it is the type of the data
+    // byte [2..N] The value. N is equal to byte0 - 1
+    for (uint8_t i = 0; i < params->advertisingDataLen; ++i) {
+
+        const uint8_t record_length = params->advertisingData[i];
+        if (record_length == 0) {
+            continue;
+        }
+        const uint8_t type = params->advertisingData[i + 1];
+        const uint8_t* value = params->advertisingData + i + 2;
+        const uint8_t value_length = record_length - 1;
+
+        if(type == GapAdvertisingData::COMPLETE_LOCAL_NAME) {
+            if ((value_length == sizeof(PEER_NAME)) && (memcmp(value, PEER_NAME, value_length) == 0)) {
+                printf(
+                    "adv peerAddr[%02x %02x %02x %02x %02x %02x] rssi %d, isScanResponse %u, AdvertisementType %u\r\n",
+                    params->peerAddr[5], params->peerAddr[4], params->peerAddr[3], params->peerAddr[2],
+                    params->peerAddr[1], params->peerAddr[0], params->rssi, params->isScanResponse, params->type
+                );
+                BLE::Instance().gap().connect(params->peerAddr, Gap::ADDR_TYPE_RANDOM_STATIC, NULL, NULL);
+                break;
+            }
+        }
+        i += record_length;
+    }
+}
+
+void serviceDiscoveryCallback(const DiscoveredService *service) {
+    if (service->getUUID().shortOrLong() == UUID::UUID_TYPE_SHORT) {
+        printf("S UUID-%x attrs[%u %u]\r\n", service->getUUID().getShortUUID(), service->getStartHandle(), service->getEndHandle());
+    } else {
+        printf("S UUID-");
+        const uint8_t *longUUIDBytes = service->getUUID().getBaseUUID();
+        for (unsigned i = 0; i < UUID::LENGTH_OF_LONG_UUID; i++) {
+            printf("%02x", longUUIDBytes[i]);
+        }
+        printf(" attrs[%u %u]\r\n", service->getStartHandle(), service->getEndHandle());
+    }
+}
+
+void updateLedCharacteristic(void) {
+    if (!BLE::Instance().gattClient().isServiceDiscoveryActive()) {
+        ledCharacteristic.read();
+    }
+}
+
+void characteristicDiscoveryCallback(const DiscoveredCharacteristic *characteristicP) {
+    printf("  C UUID-%x valueAttr[%u] props[%x]\r\n", characteristicP->getUUID().getShortUUID(), characteristicP->getValueHandle(), (uint8_t)characteristicP->getProperties().broadcast());
+    if (characteristicP->getUUID().getShortUUID() == 0xa001) { /* !ALERT! Alter this filter to suit your device. */
+        ledCharacteristic        = *characteristicP;
+        triggerLedCharacteristic = true;
+    }
+}
+
+void discoveryTerminationCallback(Gap::Handle_t connectionHandle) {
+    printf("terminated SD for handle %u\r\n", connectionHandle);
+    if (triggerLedCharacteristic) {
+        triggerLedCharacteristic = false;
+        eventQueue.call(updateLedCharacteristic);
+    }
+}
+
+void connectionCallback(const Gap::ConnectionCallbackParams_t *params) {
+    if (params->role == Gap::CENTRAL) {
+        BLE &ble = BLE::Instance();
+        ble.gattClient().onServiceDiscoveryTermination(discoveryTerminationCallback);
+        ble.gattClient().launchServiceDiscovery(params->handle, serviceDiscoveryCallback, characteristicDiscoveryCallback, 0xa000, 0xa001);
+    }
+}
+
+void triggerToggledWrite(const GattReadCallbackParams *response) {
+    if (response->handle == ledCharacteristic.getValueHandle()) {
+        printf("triggerToggledWrite: handle %u, offset %u, len %u\r\n", response->handle, response->offset, response->len);
+        for (unsigned index = 0; index < response->len; index++) {
+            printf("%c[%02x]", response->data[index], response->data[index]);
+        }
+        printf("\r\n");
+
+        ledCharacteristic.write(1, &toggledValue);
+    }
+}
+
+void triggerRead(const GattWriteCallbackParams *response) {
+    if (response->handle == ledCharacteristic.getValueHandle()) {
+        ledCharacteristic.read();
+    }
+}
+
+void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *) {
+    printf("disconnected\r\n");
+    /* Start scanning and try to connect again */
+    BLE::Instance().gap().startScan(advertisementCallback);
+}
+
+void onBleInitError(BLE &ble, ble_error_t error)
+{
+   /* Initialization error handling should go here */
+}
+
+void printMacAddress()
+{
+    /* Print out device MAC address to the console*/
+    Gap::AddressType_t addr_type;
+    Gap::Address_t address;
+    BLE::Instance().gap().getAddress(&addr_type, address);
+    printf("DEVICE MAC ADDRESS: ");
+    for (int i = 5; i >= 1; i--){
+        printf("%02x:", address[i]);
+    }
+    printf("%02x\r\n", address[0]);
+}
+
+void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
+{
+    BLE&        ble   = params->ble;
+    ble_error_t error = params->error;
+
+    if (error != BLE_ERROR_NONE) {
+        /* In case of error, forward the error handling to onBleInitError */
+        onBleInitError(ble, error);
+        return;
+    }
+
+    /* Ensure that it is the default instance of BLE */
+    if (ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
+        return;
+    }
+
+    ble.gap().onDisconnection(disconnectionCallback);
+    ble.gap().onConnection(connectionCallback);
+    
+    ble.gattClient().onDataRead(triggerToggledWrite);
+    ble.gattClient().onDataWrite(triggerRead);
+
+    // scan interval: 400ms and scan window: 400ms.
+    // Every 400ms the device will scan for 400ms
+    // This means that the device will scan continuously.
+    ble.gap().setScanParams(400, 400);
+    ble.gap().startScan(advertisementCallback);
+
+    printMacAddress();
+}
+
+void scheduleBleEventsProcessing(BLE::OnEventsToProcessCallbackContext* context) {
+    BLE &ble = BLE::Instance();
+    eventQueue.call(Callback<void()>(&ble, &BLE::processEvents));
+}
+
+void btn_on (){
+    toggledValue = 0x1;
+}
+
+void btn_off (){
+    toggledValue = 0x0;
+}
+
+int main()
+{
+    triggerLedCharacteristic = false;
+    eventQueue.call_every(500, periodicCallback);
+    
+    button.fall(&btn_on);
+    button.rise(&btn_off);
+
+    BLE &ble = BLE::Instance();
+    ble.onEventsToProcess(scheduleBleEventsProcessing);
+    ble.init(bleInitComplete);
+
+    eventQueue.dispatch_forever();
+
+    return 0;
+}