NFC does not scan when Soft device is loaded and section placement macros are changed.

[Shruthi K R]

Hello,

I'm trying to merge NFC writeable example "writable_ndef_msg" with BLE Beacon "ble_app_beacon". My aim is to start BLE Beacon after the scanning of NFC. I have added all the NFC supporting .c files, header files and added config parameters to "ble_app_beacon" example located in ble_peripheral folder. Im using nRF52832 DK with SDK17.0.2 version and softdevice s132. on ses.

In section placement macros, I have modified the following since there was a overlap.

FLASH_PH_START=0x0

FLASH_PH_SIZE=0x80000

RAM_PH_START=0x20000000

RAM_PH_SIZE=0x20000

FLASH_START=0x26000

FLASH_SIZE=0x80000

RAM_START=0x200022B0

RAM_SIZE=0x10000

I'm able to download the program to the DK. But not able to scan NFC. I have followed the query in this link . But was not able to resolve. (writable_ndef_msg and ble_app_beacon independently works fine)

So, Second thing which I tried was, to modify the section placement macros in writable_ndef_msg program to the same values as above. I was unable to scan the NFC if the RAM and Flash are modified here.

[Joakim Jakobsen]

Hi.

You have checked that your code runs? Apart from not beeing able to scan NFC. You don't get stuck in an error handler or something similar?

I can forward your ticket to one of our NFC experts, and ask If they have some suggestions. I don't immediately see what the cause of this might be.

Br,
Joakim

[Shruthi K R]

There are no errors while downloading the program. But when I debug, it is getting stuck at one of the commands - ldr r1,[sp, #24] please find the screen shot of debug window and registers. Debug is stopping here and consuming large number of cycles.

              

This is my main.c file.

Fullscreen 08641.main.c Download

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/** @file
 *
 * @defgroup ble_sdk_app_beacon_main main.c
 * @{
 * @ingroup ble_sdk_app_beacon
 * @brief Beacon Transmitter Sample Application main file.
 *
 * This file contains the source code for an Beacon transmitter sample application.
 */

#include <stdbool.h>
#include <stdint.h>
#include "nordic_common.h"
#include "bsp.h"
#include "nrf_soc.h"
#include "nrf_sdh.h"
#include "nrf_sdh_ble.h"
#include "ble_advdata.h"
#include "app_timer.h"
#include "nrf_pwr_mgmt.h"

#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"

//***********************start******************************
#include "app_error.h"
#include "app_scheduler.h"
#include "boards.h"
#include "nfc_t4t_lib.h"
#include "nrf_log_ctrl.h"
#include "ndef_file_m.h"
#include "nfc_ndef_msg.h"
#include "nfc_ndef_msg_parser.h"
#include "nfc_ndef_msg_parser_local.h"

#include "nrf_delay.h"
#include "nrf_gpio.h"

//***********************end*****************************


#define APP_BLE_CONN_CFG_TAG            1                                  /**< A tag identifying the SoftDevice BLE configuration. */

#define NON_CONNECTABLE_ADV_INTERVAL    MSEC_TO_UNITS(100, UNIT_0_625_MS)  /**< The advertising interval for non-connectable advertisement (100 ms). This value can vary between 100ms to 10.24s). */

#define APP_BEACON_INFO_LENGTH          0x17                               /**< Total length of information advertised by the Beacon. */
#define APP_ADV_DATA_LENGTH             0x15                               /**< Length of manufacturer specific data in the advertisement. */
#define APP_DEVICE_TYPE                 0x02                               /**< 0x02 refers to Beacon. */
#define APP_MEASURED_RSSI               0xC3                               /**< The Beacon's measured RSSI at 1 meter distance in dBm. */
#define APP_COMPANY_IDENTIFIER          0x0059                             /**< Company identifier for Nordic Semiconductor ASA. as per www.bluetooth.org. */
#define APP_MAJOR_VALUE                 0x01, 0x02                         /**< Major value used to identify Beacons. */
#define APP_MINOR_VALUE                 0x03, 0x04                         /**< Minor value used to identify Beacons. */
#define APP_BEACON_UUID                 0x01, 0x12, 0x23, 0x34, \
                                        0x45, 0x56, 0x67, 0x78, \
                                        0x89, 0x9a, 0xab, 0xbc, \
                                        0xcd, 0xde, 0xef, 0xf0            /**< Proprietary UUID for Beacon. */

#define DEAD_BEEF                       0xDEADBEEF                         /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */

#if defined(USE_UICR_FOR_MAJ_MIN_VALUES)
#define MAJ_VAL_OFFSET_IN_BEACON_INFO   18                                 /**< Position of the MSB of the Major Value in m_beacon_info array. */
#define UICR_ADDRESS                    0x10001080                         /**< Address of the UICR register used by this example. The major and minor versions to be encoded into the advertising data will be picked up from this location. */
#endif

//******************************start******************************
#define APP_SCHED_MAX_EVENT_SIZE 0                  /**< Maximum size of scheduler events. */
#define APP_SCHED_QUEUE_SIZE     4                  /**< Maximum number of events in the scheduler queue. */
#define APP_DEFAULT_BTN          BSP_BOARD_BUTTON_0 /**< Button used to set default NDEF message. */

//*******************************end*****************************


static ble_gap_adv_params_t m_adv_params;                                  /**< Parameters to be passed to the stack when starting advertising. */
static uint8_t              m_adv_handle = BLE_GAP_ADV_SET_HANDLE_NOT_SET; /**< Advertising handle used to identify an advertising set. */
static uint8_t              m_enc_advdata[BLE_GAP_ADV_SET_DATA_SIZE_MAX];  /**< Buffer for storing an encoded advertising set. */


//*******************************start******************************
static uint8_t m_ndef_msg_buf[NDEF_FILE_SIZE];      /**< Buffer for NDEF file. */
static uint8_t m_ndef_msg_len;                      /**< Length of the NDEF message. */

//**********************************end****************************



///**@brief Struct that contains pointers to the encoded advertising data. */
static ble_gap_adv_data_t m_adv_data =
{
    .adv_data =
    {
        .p_data = m_enc_advdata,
        .len    = BLE_GAP_ADV_SET_DATA_SIZE_MAX
    },
    .scan_rsp_data =
    {
        .p_data = NULL,
        .len    = 0

    }
};


static uint8_t m_beacon_info[APP_BEACON_INFO_LENGTH] =                    /**< Information advertised by the Beacon. */
{
    APP_DEVICE_TYPE,     // Manufacturer specific information. Specifies the device type in this
                         // implementation.
    APP_ADV_DATA_LENGTH, // Manufacturer specific information. Specifies the length of the
                         // manufacturer specific data in this implementation.
    APP_BEACON_UUID,     // 128 bit UUID value.
    APP_MAJOR_VALUE,     // Major arbitrary value that can be used to distinguish between Beacons.
    APP_MINOR_VALUE,     // Minor arbitrary value that can be used to distinguish between Beacons.
    APP_MEASURED_RSSI    // Manufacturer specific information. The Beacon's measured TX power in
                         // this implementation.
};


///**@brief Callback function for asserts in the SoftDevice.
// *
// * @details This function will be called in case of an assert in the SoftDevice.
// *
// * @warning This handler is an example only and does not fit a final product. You need to analyze
// *          how your product is supposed to react in case of Assert.
// * @warning On assert from the SoftDevice, the system can only recover on reset.
// *
// * @param[in]   line_num   Line number of the failing ASSERT call.
// * @param[in]   file_name  File name of the failing ASSERT call.
// */
void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name)
{
    app_error_handler(DEAD_BEEF, line_num, p_file_name);
}

///**@brief Function for initializing the Advertising functionality.
// *
// * @details Encodes the required advertising data and passes it to the stack.
// *          Also builds a structure to be passed to the stack when starting advertising.
// */
static void advertising_init(void)
{
    uint32_t      err_code;
    ble_advdata_t advdata;
    uint8_t       flags = BLE_GAP_ADV_FLAG_BR_EDR_NOT_SUPPORTED;

    ble_advdata_manuf_data_t manuf_specific_data;

    manuf_specific_data.company_identifier = APP_COMPANY_IDENTIFIER;

#if defined(USE_UICR_FOR_MAJ_MIN_VALUES)
    // If USE_UICR_FOR_MAJ_MIN_VALUES is defined, the major and minor values will be read from the
    // UICR instead of using the default values. The major and minor values obtained from the UICR
    // are encoded into advertising data in big endian order (MSB First).
    // To set the UICR used by this example to a desired value, write to the address 0x10001080
    // using the nrfjprog tool. The command to be used is as follows.
    // nrfjprog --snr <Segger-chip-Serial-Number> --memwr 0x10001080 --val <your major/minor value>
    // For example, for a major value and minor value of 0xabcd and 0x0102 respectively, the
    // the following command should be used.
    // nrfjprog --snr <Segger-chip-Serial-Number> --memwr 0x10001080 --val 0xabcd0102
    uint16_t major_value = ((*(uint32_t *)UICR_ADDRESS) & 0xFFFF0000) >> 16;
    uint16_t minor_value = ((*(uint32_t *)UICR_ADDRESS) & 0x0000FFFF);

    uint8_t index = MAJ_VAL_OFFSET_IN_BEACON_INFO;

    m_beacon_info[index++] = MSB_16(major_value);
    m_beacon_info[index++] = LSB_16(major_value);

    m_beacon_info[index++] = MSB_16(minor_value);
    m_beacon_info[index++] = LSB_16(minor_value);
#endif

    manuf_specific_data.data.p_data = (uint8_t *) m_beacon_info;
    manuf_specific_data.data.size   = APP_BEACON_INFO_LENGTH;

    // Build and set advertising data.
    memset(&advdata, 0, sizeof(advdata));

    advdata.name_type             = BLE_ADVDATA_NO_NAME;
    advdata.flags                 = flags;
    advdata.p_manuf_specific_data = &manuf_specific_data;

    // Initialize advertising parameters (used when starting advertising).
    memset(&m_adv_params, 0, sizeof(m_adv_params));

    m_adv_params.properties.type = BLE_GAP_ADV_TYPE_NONCONNECTABLE_NONSCANNABLE_UNDIRECTED;
    m_adv_params.p_peer_addr     = NULL;    // Undirected advertisement.
    m_adv_params.filter_policy   = BLE_GAP_ADV_FP_ANY;
    m_adv_params.interval        = NON_CONNECTABLE_ADV_INTERVAL;
    m_adv_params.duration        = 0;       // Never time out.

    err_code = ble_advdata_encode(&advdata, m_adv_data.adv_data.p_data, &m_adv_data.adv_data.len);
    APP_ERROR_CHECK(err_code);

    err_code = sd_ble_gap_adv_set_configure(&m_adv_handle, &m_adv_data, &m_adv_params);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for starting advertising.
 */
static void advertising_start(void)
{
    ret_code_t err_code;

    err_code = sd_ble_gap_adv_start(m_adv_handle, APP_BLE_CONN_CFG_TAG);
    APP_ERROR_CHECK(err_code);

    err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for initializing the BLE stack.
 *
 * @details Initializes the SoftDevice and the BLE event interrupt.
 */
static void ble_stack_init(void)
{
    ret_code_t err_code;

    err_code = nrf_sdh_enable_request();
    APP_ERROR_CHECK(err_code);

    // Configure the BLE stack using the default settings.
    // Fetch the start address of the application RAM.
    uint32_t ram_start = 0;
    err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
    APP_ERROR_CHECK(err_code);

    // Enable BLE stack.
    err_code = nrf_sdh_ble_enable(&ram_start);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for initializing logging. */
static void log_init(void)
{
    ret_code_t err_code = NRF_LOG_INIT(NULL);
    APP_ERROR_CHECK(err_code);

    NRF_LOG_DEFAULT_BACKENDS_INIT();
}

///**@brief Function for initializing LEDs. */
static void leds_init(void)
{
    ret_code_t err_code = bsp_init(BSP_INIT_LEDS, NULL);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for initializing timers. */
static void timers_init(void)
{
    ret_code_t err_code = app_timer_init();
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for initializing power management.
 */
static void power_management_init(void)
{
    ret_code_t err_code;
    err_code = nrf_pwr_mgmt_init();
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for handling the idle state (main loop).
 *
 * @details If there is no pending log operation, then sleep until next the next event occurs.
 */
static void idle_state_handle(void)
{
    if (NRF_LOG_PROCESS() == false)
    {
        nrf_pwr_mgmt_run();
    }
}



//**************************start********************************
/**
 * @brief Function for updating NDEF message in the flash file.
 */
static void scheduler_ndef_file_update(void * p_event_data, uint16_t event_size)
{
    ret_code_t err_code;

    UNUSED_PARAMETER(p_event_data);
    UNUSED_PARAMETER(event_size);

    // Update flash file with new NDEF message.
    err_code = ndef_file_update(m_ndef_msg_buf, m_ndef_msg_len + NLEN_FIELD_SIZE);
    APP_ERROR_CHECK(err_code);

    NRF_LOG_INFO("NDEF message updated!");
    NRF_LOG_INFO(m_ndef_msg_buf);

 //******start Beacon after ndef file update***************

    NRF_LOG_INFO("Beacon example started.");
    advertising_start();
// ***********************************************
    
}


/**
 * @brief Callback function for handling NFC events.
 */
static void nfc_callback(void          * context,
                         nfc_t4t_event_t event,
                         const uint8_t * data,
                         size_t          dataLength,
                         uint32_t        flags)
{
    (void)context;

    switch (event)
    {
        case NFC_T4T_EVENT_FIELD_ON:
            bsp_board_led_on(BSP_BOARD_LED_0);
            break;

        case NFC_T4T_EVENT_FIELD_OFF:
            bsp_board_leds_off();
            break;

        case NFC_T4T_EVENT_NDEF_READ:
            bsp_board_led_on(BSP_BOARD_LED_3);
            break;

        case NFC_T4T_EVENT_NDEF_UPDATED:
            if (dataLength > 0)
            {
                ret_code_t err_code;

                bsp_board_led_on(BSP_BOARD_LED_1);

                // Schedule update of NDEF message in the flash file.
                m_ndef_msg_len = dataLength;
                err_code       = app_sched_event_put(NULL, 0, scheduler_ndef_file_update);
                APP_ERROR_CHECK(err_code);

          }
            break;

        default:
            break;
    }
}



//****************************end*********************************
/**
 * @brief Function for application main entry.
 */
int main(void)
{
    // Initialize.
    log_init();
    timers_init();
    leds_init();
    power_management_init();
    ble_stack_init();
    advertising_init();

    //***************************
    ret_code_t err_code;
    NRF_LOG_DEBUG("Started!");
     /* Configure LED-pins as outputs */
    bsp_board_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS);

    /* Initialize App Scheduler. */
    APP_SCHED_INIT(APP_SCHED_MAX_EVENT_SIZE, APP_SCHED_QUEUE_SIZE);

    /* Initialize FDS. */
    err_code = ndef_file_setup();
    APP_ERROR_CHECK(err_code);

    /* Load NDEF message from the flash file. */
    err_code = ndef_file_load(m_ndef_msg_buf, sizeof(m_ndef_msg_buf));
    APP_ERROR_CHECK(err_code);

    // Restore default NDEF message.
    if (bsp_board_button_state_get(APP_DEFAULT_BTN))
    {
        uint32_t size = sizeof(m_ndef_msg_buf);
        err_code = ndef_file_default_message(m_ndef_msg_buf, &size);
        APP_ERROR_CHECK(err_code);
        err_code = ndef_file_update(m_ndef_msg_buf, NDEF_FILE_SIZE);
        APP_ERROR_CHECK(err_code);
        NRF_LOG_DEBUG("Default NDEF message restored!");
    }

    /* Set up NFC */
    err_code = nfc_t4t_setup(nfc_callback, NULL);
    APP_ERROR_CHECK(err_code);

    /* Run Read-Write mode for Type 4 Tag platform */
    err_code = nfc_t4t_ndef_rwpayload_set(m_ndef_msg_buf, sizeof(m_ndef_msg_buf));
    APP_ERROR_CHECK(err_code);

    NRF_LOG_INFO("Writable NDEF message example started.");

    /* Start sensing NFC field */
    err_code = nfc_t4t_emulation_start();
    APP_ERROR_CHECK(err_code);

    while (1)
    {
        app_sched_execute();

        NRF_LOG_FLUSH();
        __WFE();
    }
    //***************************

    // Start execution.

    //NRF_LOG_INFO("Beacon example started.");
    //advertising_start();

    // Enter main loop.

    //for (;; )
    //{
    //    idle_state_handle();
    //}
}


/**
 * @}
 */

[Joakim Jakobsen]

Thank you. 

I see that you get a PC value. Maybe you can check what specific function that correlates to the PC value?

Br, 
Joakim

[Shruthi K R]

Hi,

Apologies for late response. I'm trying to change the flash and RAM address of softdevice. I saw the tutorial here. When I debug, there is an error in loading the soft device. Is there anywhere else to make changes for memory ?

I have downloaded s132 v 7.2.0. What should be the minimum RAM_START and FLASH_START ? 

I'm new to this. Also Please let know what is FLASH_PH_START and FLASH_START difference ?

[Joakim Jakobsen]

It's very hard for me to say what memory settings will work for your application, as I don't have any knowledge about it.

But if you debug the application, in the debug window you should get suggested values for RAM and Flash if not sufficient.

You can't see that?

[Shruthi K R]

FLASH_START=0x26000

FLASH_SIZE=0x5a000

RAM_START=0x20001DB8

RAM_SIZE=0xe248

Im using nRF52832 DK with s132 v7.2.0. I dont see any debug statements. The program is not downloading to the kit at all. While the RAM and FLASH sizes are being initialized, PC is loaded with some value and program stops. 

My first clarification needed is - Can NFC and BLE scanner(which has soft device 132 ) co-exist on same program. Can I get any example with combined NFC and BLE. That would be of great help.