Revision 0:dbcc46819a5e, committed 2019-11-15

Comitter:

nikoletakuneva

Date:

Fri Nov 15 15:31:52 2019 +0000

Commit message:

Step counter characteristic

Changed in this revision

diff -r 000000000000 -r dbcc46819a5e .mbed
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.mbed	Fri Nov 15 15:31:52 2019 +0000
@@ -0,0 +1,1 @@
+ROOT=.

diff -r 000000000000 -r dbcc46819a5e img/connection.png
Binary file img/connection.png has changed

diff -r 000000000000 -r dbcc46819a5e img/discovery.png
Binary file img/discovery.png has changed

diff -r 000000000000 -r dbcc46819a5e img/notifications.png
Binary file img/notifications.png has changed

diff -r 000000000000 -r dbcc46819a5e img/register_to_notifications.png
Binary file img/register_to_notifications.png has changed

diff -r 000000000000 -r dbcc46819a5e img/scan_result.png
Binary file img/scan_result.png has changed

diff -r 000000000000 -r dbcc46819a5e img/start_scan.png
Binary file img/start_scan.png has changed

diff -r 000000000000 -r dbcc46819a5e mbed-os.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Fri Nov 15 15:31:52 2019 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#5941d1718339116cd12914238ec331c84da3d08f

diff -r 000000000000 -r dbcc46819a5e mbed_app.json
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed_app.json	Fri Nov 15 15:31:52 2019 +0000
@@ -0,0 +1,22 @@
+{
+    "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"]
+        },
+        "NRF52840_DK": {
+            "target.features_add": ["BLE"]
+        },
+        "NRF52_DK": {
+            "target.features_add": ["BLE"]
+        }
+    }
+}

diff -r 000000000000 -r dbcc46819a5e module.json
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/module.json	Fri Nov 15 15:31:52 2019 +0000
@@ -0,0 +1,16 @@
+{
+  "name": "ble-batterylevel",
+  "version": "0.0.1",
+  "description": "An example of creating and updating a simple GATT Service using the BLE_API",
+  "licenses": [
+    {
+      "url": "https://spdx.org/licenses/Apache-2.0",
+      "type": "Apache-2.0"
+    }
+  ],
+  "dependencies": {
+    "ble": "^2.0.0"
+  },
+  "targetDependencies": {},
+  "bin": "./source"
+}

diff -r 000000000000 -r dbcc46819a5e readme.md
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/readme.md	Fri Nov 15 15:31:52 2019 +0000
@@ -0,0 +1,68 @@
+This example creates and updates a standard Battery Level service containing a single
+GATT characteristic.
+
+The [battery service transmits](https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.battery_service.xml) a device's battery level in percentage, with 100% being a fully charged battery and 0% being a fully drained battery.
+
+Although the sample application runs on a BLE device, it doesn't show the device's real battery level (because that changes very slowly and will make for a dull example). Instead, it transmits a fake battery level that starts at 50% (half charged). Every half second, it increments the battery level, going in single increments until reaching 100% (as if the battery is charging). It then drops down to 20% to start incrementing again.
+
+# Running the application
+
+## Requirements
+
+The sample application can be seen on any BLE scanner on a smartphone. If you don't have a scanner on your phone, please install :
+
+- [nRF Master Control Panel](https://play.google.com/store/apps/details?id=no.nordicsemi.android.mcp) for Android.
+
+- [LightBlue](https://itunes.apple.com/gb/app/lightblue-bluetooth-low-energy/id557428110?mt=8) for iPhone.
+
+Hardware requirements are in the [main readme](https://github.com/ARMmbed/mbed-os-example-ble/blob/master/README.md).
+
+## Building instructions
+
+Building instructions for all samples are in the [main readme](https://github.com/ARMmbed/mbed-os-example-ble/blob/master/README.md).
+
+## Checking for success
+
+**Note:** Screens captures depicted below show what is expected from this example if the scanner used is *nRF Master Control Panel* version 4.0.5. If you encounter any difficulties consider trying another scanner or another version of nRF Master Control Panel. Alternative scanners may require reference to their manuals.
+
+1. Build the application and install it on your board as explained in the building instructions.
+1. Open the BLE scanner on your phone.
+1. Start a scan.
+
+    ![](img/start_scan.png)
+
+    **figure 1** How to start scan using nRF Master Control Panel 4.0.5
+
+1. Find your device; it should be named `BATTERY`.
+
+    ![](img/scan_result.png)
+
+    **figure 2** Scan results using nRF Master Control Panel 4.0.5
+
+1. Establish a connection with your device.
+
+    ![](img/connection.png)
+
+    **figure 3**  How to establish a connection using Master Control Panel 4.0.5
+
+1. Discover the services and the characteristics on the device. The *Battery service* has the UUID 0x180F and includes the *Battery level* characteristic which has the UUID 0x2A19.
+
+    ![](img/discovery.png)
+
+    **figure 4** Representation of the Battery service using Master Control Panel 4.0.5
+
+1. Register for the notifications sent by the *Battery level* characteristic.
+
+    ![](img/register_to_notifications.png)
+
+    **figure 5** How to register to notifications using Master Control Panel 4.0.5
+
+
+1. You should see the battery level value change every half second. It begins at 50, goes up to 100 (in steps of 1), resets to 20 and so on.
+
+    ![](img/notifications.png)
+
+    **figure 6** Notifications view using Master Control Panel 4.0.5
+
+If you can see the characteristic, and if its value is incrementing correctly, the application is working properly.
+

diff -r 000000000000 -r dbcc46819a5e shields/TARGET_CORDIO_BLUENRG.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/shields/TARGET_CORDIO_BLUENRG.lib	Fri Nov 15 15:31:52 2019 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/cordio-ble-x-nucleo-idb0xa1/#811f3fea7aa8083c0bbf378e1b51a8b131d7efcc

diff -r 000000000000 -r dbcc46819a5e shields/TARGET_CORDIO_BLUENRG/BlueNrgHCIDriver.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/shields/TARGET_CORDIO_BLUENRG/BlueNrgHCIDriver.cpp	Fri Nov 15 15:31:52 2019 +0000
@@ -0,0 +1,601 @@
+#include <stdio.h>
+#include "CordioBLE.h"
+#include "CordioHCIDriver.h"
+#include "CordioHCITransportDriver.h"
+#include "mbed.h"
+#include "hci_api.h"
+#include "hci_cmd.h"
+#include "hci_core.h"
+#include "dm_api.h"
+#include "bstream.h"
+#include "hci_mbed_os_adaptation.h"
+#include "bluenrg_targets.h"
+#include "Thread.h"
+#include "Semaphore.h"
+#include "Mutex.h"
+
+#define HCI_RESET_RAND_CNT              4
+
+#define VENDOR_SPECIFIC_EVENT           0xFF
+#define EVT_BLUE_INITIALIZED            0x0001
+#define ACI_READ_CONFIG_DATA_OPCODE     0xFC0D
+#define ACI_WRITE_CONFIG_DATA_OPCODE    0xFC0C
+#define ACI_GATT_INIT_OPCODE            0xFD01
+#define ACI_GAP_INIT_OPCODE             0xFC8A
+
+#define PUBLIC_ADDRESS_OFFSET           0x00
+#define RANDOM_STATIC_ADDRESS_OFFSET    0x80
+#define LL_WITHOUT_HOST_OFFSET          0x2C
+#define ROLE_OFFSET                     0x2D
+
+#define SPI_STACK_SIZE                  1024
+
+namespace ble {
+namespace vendor {
+namespace bluenrg {
+
+/**
+ * BlueNRG HCI driver implementation.
+ * @see cordio::CordioHCIDriver
+ */
+class HCIDriver : public cordio::CordioHCIDriver
+{
+public:
+    /**
+     * Construction of the BlueNRG HCIDriver.
+     * @param transport: Transport of the HCI commands.
+     * @param rst: Name of the reset pin
+     */
+    HCIDriver(cordio::CordioHCITransportDriver& transport_driver, PinName rst) :
+        cordio::CordioHCIDriver(transport_driver), rst(rst) { }
+
+    /**
+     * @see CordioHCIDriver::do_initialize
+     */
+    virtual void do_initialize() {
+        bluenrg_reset();
+    }
+
+    /**
+     * @see CordioHCIDriver::get_buffer_pool_description
+     */
+    ble::vendor::cordio::buf_pool_desc_t get_buffer_pool_description()
+    {
+        // Use default buffer pool
+        return ble::vendor::cordio::CordioHCIDriver::get_default_buffer_pool_description();
+    }
+
+    /**
+     * @see CordioHCIDriver::start_reset_sequence
+     */
+    virtual void start_reset_sequence() {
+        reset_received = false;
+        bluenrg_initialized = false;
+        enable_link_layer_mode_ongoing = false;
+        /* send an HCI Reset command to start the sequence */
+        HciResetCmd();
+    }
+
+    /**
+     * @see CordioHCIDriver::do_terminate
+     */
+    virtual void do_terminate() {
+
+    }
+
+    /**
+     * @see CordioHCIDriver::handle_reset_sequence
+     */
+    virtual void handle_reset_sequence(uint8_t *pMsg) {
+        uint16_t       opcode;
+        static uint8_t randCnt;
+        //wait_ms(5);
+
+        /* if event is a command complete event */
+        if (*pMsg == HCI_CMD_CMPL_EVT)
+        {
+            /* parse parameters */
+            pMsg += HCI_EVT_HDR_LEN;
+            pMsg++;                   /* skip num packets */
+            BSTREAM_TO_UINT16(opcode, pMsg);
+            pMsg++;                   /* skip status */
+
+            /* decode opcode */
+            switch (opcode)
+            {
+            case HCI_OPCODE_RESET: {
+                /* initialize rand command count */
+                randCnt = 0;
+                reset_received = true;
+                // important, the bluenrg_initialized event come after the
+                // hci reset event (not documented)
+                bluenrg_initialized = false;
+            } break;
+
+            // ACL packet ...
+            case ACI_WRITE_CONFIG_DATA_OPCODE:
+                if (enable_link_layer_mode_ongoing) {
+                    enable_link_layer_mode_ongoing = false;
+                    aciSetRole();
+                } else {
+                    aciGattInit();
+                }
+                break;
+
+            case ACI_GATT_INIT_OPCODE:
+                aciGapInit();
+                break;
+
+            case ACI_GAP_INIT_OPCODE:
+                aciReadConfigParameter(RANDOM_STATIC_ADDRESS_OFFSET);
+                break;
+
+            case ACI_READ_CONFIG_DATA_OPCODE:
+                // note: will send the HCI command to send the random address
+                cordio::BLE::deviceInstance().getGap().setAddress(
+                    BLEProtocol::AddressType::RANDOM_STATIC,
+                    pMsg
+                );
+                break;
+
+            case HCI_OPCODE_LE_SET_RAND_ADDR:
+                HciSetEventMaskCmd((uint8_t *) hciEventMask);
+                break;
+
+            case HCI_OPCODE_SET_EVENT_MASK:
+                /* send next command in sequence */
+                HciLeSetEventMaskCmd((uint8_t *) hciLeEventMask);
+                break;
+
+            case HCI_OPCODE_LE_SET_EVENT_MASK:
+// Note: the public address is not read because there is no valid public address
+// provisioned by default on the target
+// Enable if the
+#if MBED_CONF_CORDIO_BLUENRG_VALID_PUBLIC_BD_ADDRESS == 1
+                /* send next command in sequence */
+                HciReadBdAddrCmd();
+                break;
+
+            case HCI_OPCODE_READ_BD_ADDR:
+                /* parse and store event parameters */
+                BdaCpy(hciCoreCb.bdAddr, pMsg);
+
+                /* send next command in sequence */
+#endif
+                HciLeReadBufSizeCmd();
+                break;
+
+            case HCI_OPCODE_LE_READ_BUF_SIZE:
+                /* parse and store event parameters */
+                BSTREAM_TO_UINT16(hciCoreCb.bufSize, pMsg);
+                BSTREAM_TO_UINT8(hciCoreCb.numBufs, pMsg);
+
+                /* initialize ACL buffer accounting */
+                hciCoreCb.availBufs = hciCoreCb.numBufs;
+
+                /* send next command in sequence */
+                HciLeReadSupStatesCmd();
+                break;
+
+            case HCI_OPCODE_LE_READ_SUP_STATES:
+                /* parse and store event parameters */
+                memcpy(hciCoreCb.leStates, pMsg, HCI_LE_STATES_LEN);
+
+                /* send next command in sequence */
+                HciLeReadWhiteListSizeCmd();
+                break;
+
+            case HCI_OPCODE_LE_READ_WHITE_LIST_SIZE:
+                /* parse and store event parameters */
+                BSTREAM_TO_UINT8(hciCoreCb.whiteListSize, pMsg);
+
+                /* send next command in sequence */
+                HciLeReadLocalSupFeatCmd();
+                break;
+
+            case HCI_OPCODE_LE_READ_LOCAL_SUP_FEAT:
+                /* parse and store event parameters */
+                BSTREAM_TO_UINT16(hciCoreCb.leSupFeat, pMsg);
+
+                /* send next command in sequence */
+                hciCoreReadResolvingListSize();
+                break;
+
+            case HCI_OPCODE_LE_READ_RES_LIST_SIZE:
+                /* parse and store event parameters */
+                BSTREAM_TO_UINT8(hciCoreCb.resListSize, pMsg);
+
+                /* send next command in sequence */
+                hciCoreReadMaxDataLen();
+                break;
+
+            case HCI_OPCODE_LE_READ_MAX_DATA_LEN:
+                {
+                    uint16_t maxTxOctets;
+                    uint16_t maxTxTime;
+
+                    BSTREAM_TO_UINT16(maxTxOctets, pMsg);
+                    BSTREAM_TO_UINT16(maxTxTime, pMsg);
+
+                    /* use Controller's maximum supported payload octets and packet duration times
+                    * for transmission as Host's suggested values for maximum transmission number
+                    * of payload octets and maximum packet transmission time for new connections.
+                    */
+                    HciLeWriteDefDataLen(maxTxOctets, maxTxTime);
+                }
+                break;
+
+            case HCI_OPCODE_LE_WRITE_DEF_DATA_LEN:
+                if (hciCoreCb.extResetSeq)
+                {
+                    /* send first extended command */
+                    (*hciCoreCb.extResetSeq)(pMsg, opcode);
+                }
+                else
+                {
+                    /* initialize extended parameters */
+                    hciCoreCb.maxAdvDataLen = 0;
+                    hciCoreCb.numSupAdvSets = 0;
+                    hciCoreCb.perAdvListSize = 0;
+
+                    /* send next command in sequence */
+                    HciLeRandCmd();
+                }
+                break;
+
+            case HCI_OPCODE_LE_READ_MAX_ADV_DATA_LEN:
+            case HCI_OPCODE_LE_READ_NUM_SUP_ADV_SETS:
+            case HCI_OPCODE_LE_READ_PER_ADV_LIST_SIZE:
+                if (hciCoreCb.extResetSeq)
+                {
+                    /* send next extended command in sequence */
+                    (*hciCoreCb.extResetSeq)(pMsg, opcode);
+                }
+                break;
+
+            case HCI_OPCODE_LE_RAND:
+                /* check if need to send second rand command */
+                if (randCnt < (HCI_RESET_RAND_CNT-1))
+                {
+                    randCnt++;
+                    HciLeRandCmd();
+                }
+                else
+                {
+                    signal_reset_sequence_done();
+                }
+                break;
+
+            default:
+                break;
+            }
+        } else {
+            /**
+             * vendor specific event
+             */
+            if (pMsg[0] == VENDOR_SPECIFIC_EVENT) {
+                /* parse parameters */
+                pMsg += HCI_EVT_HDR_LEN;
+                BSTREAM_TO_UINT16(opcode, pMsg);
+
+                if (opcode == EVT_BLUE_INITIALIZED) {
+                    if (bluenrg_initialized) {
+                        return;
+                    }
+                    bluenrg_initialized = true;
+                    if (reset_received) {
+                        aciEnableLinkLayerModeOnly();
+                    }
+                }
+
+            }
+        }
+    }
+
+private:
+    void aciEnableLinkLayerModeOnly() {
+        uint8_t data[1] = { 0x01 };
+        enable_link_layer_mode_ongoing = true;
+        aciWriteConfigData(LL_WITHOUT_HOST_OFFSET, data);
+    }
+
+    void aciSetRole() {
+        // master and slave, simultaneous advertising and scanning
+        // (up to 4 connections)
+        uint8_t data[1] = { 0x04 };
+        aciWriteConfigData(ROLE_OFFSET, data);
+    }
+
+    void aciGattInit() {
+        uint8_t *pBuf = hciCmdAlloc(ACI_GATT_INIT_OPCODE, 0);
+        if (!pBuf) {
+            return;
+        }
+        hciCmdSend(pBuf);
+    }
+
+    void aciGapInit() {
+        uint8_t *pBuf = hciCmdAlloc(ACI_GAP_INIT_OPCODE, 3);
+        if (!pBuf) {
+            return;
+        }
+        pBuf[3] = 0xF;
+        pBuf[4] = 0;
+        pBuf[5] = 0;
+        hciCmdSend(pBuf);
+    }
+
+    void aciReadConfigParameter(uint8_t offset) {
+        uint8_t *pBuf = hciCmdAlloc(ACI_READ_CONFIG_DATA_OPCODE, 1);
+        if (!pBuf) {
+            return;
+        }
+
+        pBuf[3] = offset;
+        hciCmdSend(pBuf);
+    }
+
+    template<size_t N>
+    void aciWriteConfigData(uint8_t offset, uint8_t (&buf)[N]) {
+        uint8_t *pBuf = hciCmdAlloc(ACI_WRITE_CONFIG_DATA_OPCODE, 2 + N);
+        if (!pBuf) {
+            return;
+        }
+
+        pBuf[3] = offset;
+        pBuf[4] = N;
+        memcpy(pBuf + 5, buf, N);
+        hciCmdSend(pBuf);
+    }
+
+    void hciCoreReadResolvingListSize(void)
+    {
+        /* if LL Privacy is supported by Controller and included */
+        if ((hciCoreCb.leSupFeat & HCI_LE_SUP_FEAT_PRIVACY) &&
+            (hciLeSupFeatCfg & HCI_LE_SUP_FEAT_PRIVACY))
+        {
+            /* send next command in sequence */
+            HciLeReadResolvingListSize();
+        }
+        else
+        {
+            hciCoreCb.resListSize = 0;
+
+            /* send next command in sequence */
+            hciCoreReadMaxDataLen();
+        }
+    }
+
+    void hciCoreReadMaxDataLen(void)
+    {
+    /* if LE Data Packet Length Extensions is supported by Controller and included */
+        if ((hciCoreCb.leSupFeat & HCI_LE_SUP_FEAT_DATA_LEN_EXT) &&
+            (hciLeSupFeatCfg & HCI_LE_SUP_FEAT_DATA_LEN_EXT))
+        {
+            /* send next command in sequence */
+            HciLeReadMaxDataLen();
+        }
+        else
+        {
+            /* send next command in sequence */
+            HciLeRandCmd();
+        }
+    }
+
+    void bluenrg_reset() {
+        /* Reset BlueNRG SPI interface. Hold reset line to 0 for 1500ms */
+        rst = 0;
+        wait_us(1500);
+        rst = 1;
+
+        /* Wait for the radio to come back up */
+        wait_us(100000);
+    }
+
+    DigitalOut rst;
+    bool reset_received;
+    bool bluenrg_initialized;
+    bool enable_link_layer_mode_ongoing;
+};
+
+/**
+ * Transport driver of the ST BlueNRG shield.
+ * @important: With that driver, it is assumed that the SPI bus used is not shared
+ * with other SPI peripherals. The reasons behind this choice are simplicity and
+ * performance:
+ *   - Reading from the peripheral SPI can be challenging especially if other
+ *     threads access the same SPI bus. Indeed it is common that the function
+ *     spiRead yield nothings even if the chip has signaled data with the irq
+ *     line. Sharing would make the situation worse and increase the risk of
+ *     timeout of HCI commands / response.
+ *   - This driver can be used even if the RTOS is disabled or not present it may
+ *     may be usefull for some targets.
+ *
+ * If The SPI is shared with other peripherals then the best option would be to
+ * handle SPI read in a real time thread woken up by an event flag.
+ *
+ * Other mechanisms might also be added in the future to handle data read as an
+ * event from the stack. This might not be the best solution for all BLE chip;
+ * especially this one.
+ */
+class TransportDriver : public cordio::CordioHCITransportDriver {
+public:
+    /**
+     * Construct the transport driver required by a BlueNRG module.
+     * @param mosi Pin of the SPI mosi
+     * @param miso Pin of the SPI miso
+     * @param sclk Pin of the SPI clock
+     * @param irq Pin used by the module to signal data are available.
+     */
+    TransportDriver(PinName mosi, PinName miso, PinName sclk, PinName ncs, PinName irq)
+        : spi(mosi, miso, sclk), nCS(ncs), irq(irq), _spi_thread(osPriorityNormal, SPI_STACK_SIZE, _spi_thread_stack) {
+        _spi_thread.start(callback(this, &TransportDriver::spi_read_cb));
+    }
+
+    virtual ~TransportDriver() { }
+
+    /**
+     * @see CordioHCITransportDriver::initialize
+     */
+    virtual void initialize() {
+        // Setup the spi for 8 bit data, low clock polarity,
+        // 1-edge phase, with an 8MHz clock rate
+        spi.format(8, 0);
+        spi.frequency(8000000);
+
+        // Deselect the BlueNRG chip by keeping its nCS signal high
+        nCS = 1;
+
+        wait_us(500);
+
+        // Set the interrupt handler for the device
+        irq.mode(PullDown); // set irq mode
+        irq.rise(callback(this, &TransportDriver::HCI_Isr));
+    }
+
+    /**
+     * @see CordioHCITransportDriver::terminate
+     */
+    virtual void terminate() { }
+
+    /**
+     * @see CordioHCITransportDriver::write
+     */
+    virtual uint16_t write(uint8_t type, uint16_t len, uint8_t *pData) {
+        // repeat write until successfull. A number of attempt or timeout might
+        // be useful
+        while (spiWrite(type, pData, len) == 0) { }
+        return len;
+    }
+
+private:
+    uint16_t spiWrite(uint8_t type, const uint8_t* data, uint16_t data_length) {
+        static const uint8_t header_master[] = {
+            0x0A, 0x00, 0x00, 0x00, 0x00
+        };
+        uint8_t header_slave[]  = { 0xaa, 0x00, 0x00, 0x00, 0x00 };
+        uint16_t data_written = 0;
+        uint16_t write_buffer_size = 0;
+
+        _spi_mutex.lock();
+
+        /* CS reset */
+        nCS = 0;
+
+        /* Exchange header */
+        for (uint8_t i = 0; i < sizeof(header_master); ++i) {
+            header_slave[i] = spi.write(header_master[i]);
+        }
+
+        if (header_slave[0] != 0x02) {
+            goto exit;
+        }
+
+        write_buffer_size = header_slave[2] << 8 | header_slave[1];
+
+        if (write_buffer_size == 0 || write_buffer_size < (data_length + 1)) {
+            goto exit;
+        }
+
+        spi.write(type);
+
+        data_written = data_length;
+        for (uint16_t i = 0; i < data_length; ++i) {
+            spi.write(data[i]);
+        }
+
+    exit:
+        nCS = 1;
+
+        _spi_mutex.unlock();
+
+        return data_written;
+    }
+
+    uint16_t spiRead(uint8_t* data_buffer, const uint16_t buffer_size)
+    {
+        static const uint8_t header_master[] = {0x0b, 0x00, 0x00, 0x00, 0x00};
+        uint8_t header_slave[5] = { 0xaa, 0x00, 0x00, 0x00, 0x00};
+        uint16_t read_length = 0;
+        uint16_t data_available = 0;
+
+        nCS = 0;
+
+        /* Read the header */
+        for (size_t i = 0; i < sizeof(header_master); i++) {
+            header_slave[i] = spi.write(header_master[i]);
+        }
+
+        if (header_slave[0] != 0x02) {
+            goto exit;
+        }
+
+        data_available = (header_slave[4] << 8) | header_slave[3];
+        read_length = data_available > buffer_size ? buffer_size : data_available;
+
+        for (uint16_t i = 0; i < read_length; ++i) {
+            data_buffer[i] = spi.write(0xFF);
+        }
+
+    exit:
+        nCS = 1;
+
+        return read_length;
+    }
+
+    /*
+     * might be split into two parts: the IRQ signaling a real time thread and
+     * the real time thread reading data from the SPI.
+     */
+    void HCI_Isr(void)
+    {
+        _spi_read_sem.release();
+    }
+
+    void spi_read_cb() {
+        uint8_t data_buffer[256];
+        while(true) {
+            _spi_read_sem.wait();
+
+            _spi_mutex.lock();
+            while(irq == 1) {
+                uint16_t data_read = spiRead(data_buffer, sizeof(data_buffer));
+                on_data_received(data_buffer, data_read);
+            }
+            _spi_mutex.unlock();
+        }
+    }
+
+    /**
+     * Unsafe SPI, does not lock when SPI access happens.
+     */
+    ::mbed::SPI spi;
+    DigitalOut nCS;
+    InterruptIn irq;
+    rtos::Thread _spi_thread;
+    uint8_t _spi_thread_stack[SPI_STACK_SIZE];
+    rtos::Semaphore _spi_read_sem;
+    rtos::Mutex _spi_mutex;
+};
+
+} // namespace bluenrg
+} // namespace vendor
+} // namespace ble
+
+/**
+ * Cordio HCI driver factory
+ */
+ble::vendor::cordio::CordioHCIDriver& ble_cordio_get_hci_driver() {
+    static ble::vendor::bluenrg::TransportDriver transport_driver(
+        BLUENRG_PIN_SPI_MOSI,
+        BLUENRG_PIN_SPI_MISO,
+        BLUENRG_PIN_SPI_SCK,
+        BLUENRG_PIN_SPI_nCS,
+        BLUENRG_PIN_SPI_IRQ
+    );
+    static ble::vendor::bluenrg::HCIDriver hci_driver(
+        transport_driver,
+        BLUENRG_PIN_SPI_RESET
+    );
+    return hci_driver;
+}

diff -r 000000000000 -r dbcc46819a5e shields/TARGET_CORDIO_BLUENRG/README.md
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/shields/TARGET_CORDIO_BLUENRG/README.md	Fri Nov 15 15:31:52 2019 +0000
@@ -0,0 +1,52 @@
+# Cordio BLE-X-NUCLEO-IDB0XA1
+
+BLE_API wrapper Library for X-NUCLEO-IDB05A1 BlueNRG (Bluetooth Low Energy) Expansion Board. It uses ARM Cordio stack instead of the ST BlueNRG stack. 
+
+## Introduction
+
+This firmware package implements the port of BLE_API to STMicroelectronics' [X-NUCLEO-IDB05A1](https://developer.mbed.org/components/X-NUCLEO-IDB05A1-Bluetooth-Low-Energy/) Bluetooth Low Energy Nucleo Expansion Board.
+
+### Arduino Connector Compatibility Warning
+
+X-NUCLEO-IDB05A1 is Arduino compatible with an exception: instead of using pin **D13** for the SPI clock, pin **D3** is used.
+The default configuration for this library is having the SPI clock on pin **D3**.
+
+To be fully Arduino compatible, X-NUCLEO-IDB05A1 needs a small HW patch.
+
+For X-NUCLEO-IDB05A1 this patch consists in removing zero resistor **R4** and instead soldering zero resistor **R6**.
+
+In case you patch your board, then you also have to configure this library to use pin **D13** to drive the SPI clock. To this aim you need to compile this driver with macro `BLUENRG_PIN_SPI_SCK=D13` defined.
+
+If you use pin **D13** for the SPI clock, please be aware that on STM32 Nucleo boards you may **not** drive the LED, otherwise you will get a conflict: the LED on STM32 Nucleo boards is connected to pin **D13**.
+
+Referring to the current list of tested platforms (see [X-NUCLEO-IDB05A1](https://developer.mbed.org/components/X-NUCLEO-IDB05A1-Bluetooth-Low-Energy/) page), the patch is required by [ST-Nucleo-F103RB](https://developer.mbed.org/platforms/ST-Nucleo-F103RB/); [ST-Nucleo-F302R8](https://developer.mbed.org/platforms/ST-Nucleo-F302R8/); [ST-Nucleo-F411RE](https://developer.mbed.org/platforms/ST-Nucleo-F411RE/); [ST-Nucleo-F446RE](https://developer.mbed.org/platforms/ST-Nucleo-F446RE/); and [FRDM-K64F](https://developer.mbed.org/platforms/FRDM-K64F/).
+
+
+### Driver configuration
+
+In order to use the BlueNRG-MS module together with other targets, you need to set the macros defined in file [bluenrg_targets.h](https://github.com/ARMmbed/ble-x-nucleo-idb0xa1/blob/master/bluenrg/bluenrg_targets.h). Please, update the [mbed_lib.json](https://github.com/ARMmbed/ble-x-nucleo-idb0xa1/blob/master/mbed_lib.json) to include the list of extra macros that configure the driver for your target.
+
+## Target Configuration
+
+To use that library, the target requires some extra configuration in the application `mbed_app.json`. In the `target_overides` section:   
+
+* BLE feature has to be enabled for the target using the BlueNRG module
+
+```json
+"target.features_add": ["BLE"]
+```
+
+* Extra labels have to be defined to include the cordio stack and this library: 
+
+```json
+"target.extra_labels_add": ["CORDIO", "CORDIO_BLUENRG"]
+```
+
+As an example, the target overide section for the `NUCLEO_F401RE` would be: 
+
+```json
+        "NUCLEO_F401RE": {
+            "target.features_add": ["BLE"],
+            "target.extra_labels_add": ["CORDIO", "CORDIO_BLUENRG"]
+        }
+```

diff -r 000000000000 -r dbcc46819a5e shields/TARGET_CORDIO_BLUENRG/bluenrg_targets.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/shields/TARGET_CORDIO_BLUENRG/bluenrg_targets.h	Fri Nov 15 15:31:52 2019 +0000
@@ -0,0 +1,65 @@
+/**
+  ******************************************************************************
+  * @file    bluenrg_targets.h
+  * @author  AST / EST
+  * @version V0.0.1
+  * @date    24-July-2015
+  * @brief   This header file is intended to manage the differences between
+  *          the different supported base-boards which might mount the
+  *          X_NUCLEO_IDB0XA1 BlueNRG BLE Expansion Board.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+
+/* Define to prevent from recursive inclusion --------------------------------*/
+#ifndef _BLUENRG_TARGETS_H_
+#define _BLUENRG_TARGETS_H_
+
+#if !defined(BLUENRG_PIN_SPI_MOSI)
+#define BLUENRG_PIN_SPI_MOSI   (D11)
+#endif
+#if !defined(BLUENRG_PIN_SPI_MISO)
+#define BLUENRG_PIN_SPI_MISO   (D12)
+#endif
+#if !defined(BLUENRG_PIN_SPI_nCS)
+#define BLUENRG_PIN_SPI_nCS    (A1)
+#endif
+#if !defined(BLUENRG_PIN_SPI_RESET)
+#define BLUENRG_PIN_SPI_RESET  (D7)
+#endif
+#if !defined(BLUENRG_PIN_SPI_IRQ)
+#define BLUENRG_PIN_SPI_IRQ    (A0)
+#endif
+
+/* NOTE: Refer to README for further details regarding BLUENRG_PIN_SPI_SCK */
+#if !defined(BLUENRG_PIN_SPI_SCK)
+#define BLUENRG_PIN_SPI_SCK    (D3)
+#endif
+
+#endif // _BLUENRG_TARGTES_H_

diff -r 000000000000 -r dbcc46819a5e shields/TARGET_CORDIO_BLUENRG/mbed_lib.json
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/shields/TARGET_CORDIO_BLUENRG/mbed_lib.json	Fri Nov 15 15:31:52 2019 +0000
@@ -0,0 +1,24 @@
+{
+    "name": "cordio_bluenrg",
+    "config": {
+        "valid-public-bd-address": {
+            "help": "Read the BD public address at startup",
+            "value": false
+        }
+    },
+    "target_overrides": {
+        "K64F": {
+            "target.macros_add": ["BLUENRG_PIN_SPI_SCK=D13"]
+        },
+        "DISCO_L475VG_IOT01A": {
+            "target.macros_add": [
+                "BLUENRG_PIN_SPI_MOSI=PC_12",
+                "BLUENRG_PIN_SPI_MISO=PC_11",
+                "BLUENRG_PIN_SPI_nCS=PD_13",
+                "BLUENRG_PIN_SPI_RESET=PA_8",
+                "BLUENRG_PIN_SPI_IRQ=PE_6",
+                "BLUENRG_PIN_SPI_SCK=PC_10"
+            ]
+        }
+    }
+}

diff -r 000000000000 -r dbcc46819a5e source/main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/main.cpp	Fri Nov 15 15:31:52 2019 +0000
@@ -0,0 +1,168 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2014 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/Gap.h"
+#include "pretty_printer.h"
+
+static DigitalOut led1(LED1, 1);
+
+const static char DEVICE_NAME[] = "STEP COUNTER";
+
+const static uint16_t STEP_COUNTER_SERVICE_UUID = 0xA000;
+const static uint16_t STEP_COUNTER_CHARACTERISTIC_UUID = 0xA001;
+
+int step_count = 0;
+int id = 0;
+ReadWriteGattCharacteristic<int> step_count_state(STEP_COUNTER_CHARACTERISTIC_UUID, &step_count, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY);
+
+static events::EventQueue event_queue(/* event count */ 16 * EVENTS_EVENT_SIZE);
+
+class StepCounter : ble::Gap::EventHandler {
+public:
+    StepCounter(BLE &ble, events::EventQueue &event_queue) :
+        _ble(ble),
+        _event_queue(event_queue),
+        _step_counter_uuid(STEP_COUNTER_SERVICE_UUID),
+        _adv_data_builder(_adv_buffer) { }
+
+    void start() {
+        _ble.gap().setEventHandler(this);
+
+        _ble.init(this, &StepCounter::on_init_complete);
+        _event_queue.call_every(500, this, &StepCounter::blink);
+        _event_queue.call_every(1000, this, &StepCounter::update_step_count);
+
+        _event_queue.dispatch_forever();
+    }
+
+private:
+    /** Callback triggered when the ble initialization process has finished */
+    void on_init_complete(BLE::InitializationCompleteCallbackContext *params) {
+        if (params->error != BLE_ERROR_NONE) {
+            print_error(params->error, "Ble initialization failed.");
+            return;
+        }
+        
+        _ble.gattServer().onDataWritten(this, &StepCounter::on_data_written);
+
+        print_mac_address();
+
+        start_advertising();
+    }
+
+    void start_advertising() {
+        /* Create advertising parameters and payload */
+
+        ble::AdvertisingParameters adv_parameters(
+            ble::advertising_type_t::CONNECTABLE_UNDIRECTED,
+            ble::adv_interval_t(ble::millisecond_t(1000))
+        );
+
+        _adv_data_builder.setFlags();
+        _adv_data_builder.setLocalServiceList(mbed::make_Span(&_step_counter_uuid, 1));
+        _adv_data_builder.setName(DEVICE_NAME);
+
+        /* Setup advertising */
+
+        ble_error_t error = _ble.gap().setAdvertisingParameters(
+            ble::LEGACY_ADVERTISING_HANDLE,
+            adv_parameters
+        );
+
+        if (error) {
+            print_error(error, "_ble.gap().setAdvertisingParameters() failed");
+            return;
+        }
+
+        error = _ble.gap().setAdvertisingPayload(
+            ble::LEGACY_ADVERTISING_HANDLE,
+            _adv_data_builder.getAdvertisingData()
+        );
+
+        if (error) {
+            print_error(error, "_ble.gap().setAdvertisingPayload() failed");
+            return;
+        }
+
+        /* Start advertising */
+
+        error = _ble.gap().startAdvertising(ble::LEGACY_ADVERTISING_HANDLE);
+
+        if (error) {
+            print_error(error, "_ble.gap().startAdvertising() failed");
+            return;
+        }
+    }
+    
+    void on_data_written(const GattWriteCallbackParams *params) {
+        if ((params->handle == step_count_state.getValueHandle()) && (params->len == 1)) {
+            step_count = *(params->data);
+        }
+        step_count = 0;
+    }
+
+    void update_step_count() {
+        if (_ble.gap().getState().connected) {
+            step_count++;
+
+            _ble.gattServer().write(step_count_state.getValueHandle(), (uint8_t *)&step_count, sizeof(int));
+        }
+    }
+
+    void blink(void) {
+        led1 = !led1;
+    }
+
+private:
+    /* Event handler */
+
+    void onDisconnectionComplete(const ble::DisconnectionCompleteEvent&) {
+        _ble.gap().startAdvertising(ble::LEGACY_ADVERTISING_HANDLE);
+    }
+
+private:
+    BLE &_ble;
+    events::EventQueue &_event_queue;
+    
+    UUID _step_counter_uuid;
+
+    uint8_t _adv_buffer[ble::LEGACY_ADVERTISING_MAX_SIZE];
+    ble::AdvertisingDataBuilder _adv_data_builder;
+};
+
+/** Schedule processing of events from the BLE middleware in the event queue. */
+void schedule_ble_events(BLE::OnEventsToProcessCallbackContext *context) {
+    event_queue.call(Callback<void()>(&context->ble, &BLE::processEvents));
+}
+
+int main()
+{
+    BLE &ble = BLE::Instance();
+    
+    GattCharacteristic *charTable[] = {&step_count_state};
+    GattService step_count_service(STEP_COUNTER_SERVICE_UUID, charTable, sizeof(charTable) / sizeof(GattCharacteristic *));
+    ble.addService(step_count_service);
+    
+    ble.onEventsToProcess(schedule_ble_events);
+
+    StepCounter demo(ble, event_queue);
+    demo.start();
+
+    return 0;
+}

diff -r 000000000000 -r dbcc46819a5e source/pretty_printer.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/pretty_printer.h	Fri Nov 15 15:31:52 2019 +0000
@@ -0,0 +1,95 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2018 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 <mbed.h>
+#include "ble/BLE.h"
+
+inline void print_error(ble_error_t error, const char* msg)
+{
+    printf("%s: ", msg);
+    switch(error) {
+        case BLE_ERROR_NONE:
+            printf("BLE_ERROR_NONE: No error");
+            break;
+        case BLE_ERROR_BUFFER_OVERFLOW:
+            printf("BLE_ERROR_BUFFER_OVERFLOW: The requested action would cause a buffer overflow and has been aborted");
+            break;
+        case BLE_ERROR_NOT_IMPLEMENTED:
+            printf("BLE_ERROR_NOT_IMPLEMENTED: Requested a feature that isn't yet implement or isn't supported by the target HW");
+            break;
+        case BLE_ERROR_PARAM_OUT_OF_RANGE:
+            printf("BLE_ERROR_PARAM_OUT_OF_RANGE: One of the supplied parameters is outside the valid range");
+            break;
+        case BLE_ERROR_INVALID_PARAM:
+            printf("BLE_ERROR_INVALID_PARAM: One of the supplied parameters is invalid");
+            break;
+        case BLE_STACK_BUSY:
+            printf("BLE_STACK_BUSY: The stack is busy");
+            break;
+        case BLE_ERROR_INVALID_STATE:
+            printf("BLE_ERROR_INVALID_STATE: Invalid state");
+            break;
+        case BLE_ERROR_NO_MEM:
+            printf("BLE_ERROR_NO_MEM: Out of Memory");
+            break;
+        case BLE_ERROR_OPERATION_NOT_PERMITTED:
+            printf("BLE_ERROR_OPERATION_NOT_PERMITTED");
+            break;
+        case BLE_ERROR_INITIALIZATION_INCOMPLETE:
+            printf("BLE_ERROR_INITIALIZATION_INCOMPLETE");
+            break;
+        case BLE_ERROR_ALREADY_INITIALIZED:
+            printf("BLE_ERROR_ALREADY_INITIALIZED");
+            break;
+        case BLE_ERROR_UNSPECIFIED:
+            printf("BLE_ERROR_UNSPECIFIED: Unknown error");
+            break;
+        case BLE_ERROR_INTERNAL_STACK_FAILURE:
+            printf("BLE_ERROR_INTERNAL_STACK_FAILURE: internal stack faillure");
+            break;
+    }
+    printf("\r\n");
+}
+
+/** print device address to the terminal */
+inline void print_address(const Gap::Address_t &addr)
+{
+    printf("%02x:%02x:%02x:%02x:%02x:%02x\r\n",
+           addr[5], addr[4], addr[3], addr[2], addr[1], addr[0]);
+}
+
+inline void print_mac_address()
+{
+    /* 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: ");
+    print_address(address);
+}
+
+inline const char* phy_to_string(Gap::Phy_t phy) {
+    switch(phy.value()) {
+        case Gap::Phy_t::LE_1M:
+            return "LE 1M";
+        case Gap::Phy_t::LE_2M:
+            return "LE 2M";
+        case Gap::Phy_t::LE_CODED:
+            return "LE coded";
+        default:
+            return "invalid PHY";
+    }
+}