Flash Memory Issue

RE: Flash Memory Issue

Simonr — Mon, 04 Jan 2021 13:26:15 GMT

Well, if you put the start address right after your application, you will have to move it every time you change the application so that its size increases, you need to change the address every time. If you have room for it, you can try leaving some space between the application and the Fstorage start_address. You can leave it like this during development so you won't have to change it all the time. However, when you reach a final version of your application, I would suggest moving this address to have as much space as possible for flash storage.

Best regards,

Simon

RE: Flash Memory Issue

Muqarrab — Mon, 28 Dec 2020 10:00:03 GMT

Hi Simonr
Is there any generic space available which I can use to save data? As if I made changes in my application I have to change address again. 😞

RE: Flash Memory Issue

Simonr — Fri, 18 Dec 2020 07:41:53 GMT

I see that you and Edvin discuss the bootloader as well, do you have a bootloader in your application as well. If so, where is this stored? You need to set the nrf_fstorage start and end address somewhere between the application (0x0004583b) and the start of the bootloader. Please note that these boundaries needs to be set before nrf_fstorage_init() is called in runtime.

Best regards,

Simon

RE: Flash Memory Issue

Muqarrab — Thu, 17 Dec 2020 13:39:26 GMT

Thanks Simonr

Now, which start and end I should use for FStorage?

Can you please guide me?
Thanks

NRF_FSTORAGE_DEF(nrf_fstorage_t fstorage) =
{
    /* Set a handler for fstorage events. */
    .evt_handler = fstorage_evt_handler,

    /* These below are the boundaries of the flash space assigned to this instance of fstorage.
     * You must set these manually, even at runtime, before nrf_fstorage_init() is called.
     * The function nrf5_flash_end_addr_get() can be used to retrieve the last address on the
     * last page of flash available to write data. */
    .start_addr = 0xd8000,//f4000
    .end_addr   = 0xd9000,//0xf4fff
};

RE: Flash Memory Issue

Simonr — Thu, 17 Dec 2020 11:57:29 GMT

Well, yes. You can see all the addresses that are programmed in this log, which tells you what addresses are written to during the programming of this application, so you can add the KB sizes under the Downloading 'ble_app_template_pca10056_s140.elf' to J-Link line to find the total size of your application. The SoftDevice and MBR will come in addition to this (mentioned earlier in the log).

Best regards,

Simon

RE: Flash Memory Issue

Muqarrab — Thu, 17 Dec 2020 11:43:55 GMT

[quote userid="75734" url="~/f/nordic-q-a/66816/flash-memory-issue/283723#283723"]You can check the size of your application, for example, by opening the programmer app in nRFConnect for Desktop to get a visual representation of the flash memory.[/quote]

Can I check the size of my application from here?

RE: Flash Memory Issue

Simonr — Tue, 08 Dec 2020 08:52:07 GMT

You can check the size of your application, for example, by opening the programmer app in nRFConnect for Desktop to get a visual representation of the flash memory.

Please try adding the "aligned" attribute to the data you're trying to write. This reply by my colleague Jørgen explains how you can do so.

Best regards,

Simon

RE: Flash Memory Issue

Muqarrab — Mon, 07 Dec 2020 13:09:08 GMT

Hi Simonr.
-How can I check the size of my application?

[quote userid="75734" url="~/f/nordic-q-a/66816/flash-memory-issue/281114#281114"]I would suggest the first word-aligned address that is free after the flash reserved for your application.[/quote]

-How can I do this?

Thanks

RE: Flash Memory Issue

Simonr — Fri, 20 Nov 2020 13:23:50 GMT

Well, I don't know what the size of your application, I would suggest the first word-aligned address that is free after the flash reserved for your application. You can check out the memory chapter to see which memory addresses are available for EasyDMA.

Best regards,

Simon

RE: Flash Memory Issue

Muqarrab — Fri, 20 Nov 2020 10:01:21 GMT

What should I use?

.start_addr = 0x?????,//f4000
.end_addr = 0x?????,//0xf4fff

RE: Flash Memory Issue

Simonr — Fri, 20 Nov 2020 08:54:46 GMT

This check within nrf_fstorage_write which will return the invalid address error if your destination address is not word aligned.

NRF_FSTORAGE_PARAM_CHECK(addr_is_aligned32(dest),                NRF_ERROR_INVALID_ADDR);

Please make sure that it is.

Best regards,

Simon

RE: Flash Memory Issue

Muqarrab — Fri, 20 Nov 2020 06:33:57 GMT

[quote userid="75734" url="~/f/nordic-q-a/66816/flash-memory-issue/280926#280926"]These start and end addresses seem to be too big. Can you try to reduce this so that the end address stop before 0xd9000.[/quote]

I have tried to change the address now getting this error.

NRF_FSTORAGE_DEF(nrf_fstorage_t fstorage) =
{
    /* Set a handler for fstorage events. */
    .evt_handler = fstorage_evt_handler,

    /* These below are the boundaries of the flash space assigned to this instance of fstorage.
     * You must set these manually, even at runtime, before nrf_fstorage_init() is called.
     * The function nrf5_flash_end_addr_get() can be used to retrieve the last address on the
     * last page of flash available to write data. */
    .start_addr = 0xd8000,//f4000
    .end_addr   = 0xd9000,//0xf4fff
};

Can you please suggest the start and end address.?
Thanks!

RE: Flash Memory Issue

Simonr — Thu, 19 Nov 2020 14:15:44 GMT

Hi again

You should not enable both of these backends as that may cause conflicts between the two. Please use the RTT backend if you want to log this information in SEGGER Embedded Studios. These start and end addresses seem to be too big. Can you try to reduce this so that the end address stop before 0xd9000.

Best regards,

Simon

RE: Flash Memory Issue

Muqarrab — Thu, 19 Nov 2020 08:44:29 GMT

The problem is when I connect the device and call flash read/write functions it not work.

Have I selected the write bank for flash memory?

NRF_FSTORAGE_DEF(nrf_fstorage_t fstorage) =
{
    /* Set a handler for fstorage events. */
    .evt_handler = fstorage_evt_handler,

    /* These below are the boundaries of the flash space assigned to this instance of fstorage.
     * You must set these manually, even at runtime, before nrf_fstorage_init() is called.
     * The function nrf5_flash_end_addr_get() can be used to retrieve the last address on the
     * last page of flash available to write data. */
    .start_addr = 0xf4000,
    .end_addr   = 0xf4fff,
};

RE: Flash Memory Issue

Muqarrab — Thu, 19 Nov 2020 08:37:54 GMT

// <e> NRF_LOG_BACKEND_RTT_ENABLED - nrf_log_backend_rtt - Log RTT backend
//==========================================================
#ifndef NRF_LOG_BACKEND_RTT_ENABLED
#define NRF_LOG_BACKEND_RTT_ENABLED 1
#endif




// <e> NRF_LOG_BACKEND_UART_ENABLED - nrf_log_backend_uart - Log UART backend
//==========================================================
#ifndef NRF_LOG_BACKEND_UART_ENABLED
#define NRF_LOG_BACKEND_UART_ENABLED 1
#endif

RE: Flash Memory Issue

Simonr — Thu, 19 Nov 2020 08:33:18 GMT

Can you confirm what log backend you're using? In your sdk_config.h file, either NRF_LOG_BACKEND_RTT_ENABLED or NRF_LOG_BACKEND_UART_ENABLED should be set to 1. If the UART backend is used, you need to use a terminal to read the debug information, or edit this to use the RTT instead.

Best regards,

Simon

RE: Flash Memory Issue

Muqarrab — Thu, 19 Nov 2020 06:44:22 GMT

Hi Simonr,
I have already defined this.

RE: Flash Memory Issue

Simonr — Thu, 19 Nov 2020 06:40:49 GMT

Have you set the DEBUG define in your preprocessor definitions? This is necessary in order to see any of the debug logging information in your log backend. To do so, right click your project in SES, and open Options..., then set the build configuration to Common, find the Preprocessor Definitions tab, and add DEBUG to the bottom here. See the attached picture for reference.

Best regards,

Simon

RE: Flash Memory Issue

Muqarrab — Thu, 19 Nov 2020 06:11:14 GMT

Sorry for the late reply.

[quote userid="75734" url="~/f/nordic-q-a/66816/flash-memory-issue/279635#279635"]When debugging, do you see any kind of error code in either the write_SNV() or read_SNV() functions?[/quote]

No, I have not seen any error.

The issue is when I connect the device and call the read/write function I got no response.

Here is my code.

/**
 * Copyright (c) 2014 - 2020, Nordic Semiconductor ASA
 *
 * All rights reserved.
 *
 * 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, except as embedded into a Nordic
 *    Semiconductor ASA integrated circuit in a product or a software update for
 *    such product, 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 Nordic Semiconductor ASA nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * 4. This software, with or without modification, must only be used with a
 *    Nordic Semiconductor ASA integrated circuit.
 *
 * 5. Any software provided in binary form under this license must not be reverse
 *    engineered, decompiled, modified and/or disassembled.
 *
 * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA 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.
 *
 */
/** @file
 *
 * @defgroup ble_sdk_app_template_main main.c
 * @{
 * @ingroup ble_sdk_app_template
 * @brief Template project main file.
 *
 * This file contains a template for creating a new application. It has the code necessary to wakeup
 * from button, advertise, get a connection restart advertising on disconnect and if no new
 * connection created go back to system-off mode.
 * It can easily be used as a starting point for creating a new application, the comments identified
 * with 'YOUR_JOB' indicates where and how you can customize.
 */

#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include <nrfx.h>
#include <stdio.h>
#include <ble_dis.h>

#include "nrf_nvmc.h"

#include "nordic_common.h"
#include "nrf.h"
#include "app_error.h"
#include "ble.h"
#include "ble_hci.h"
#include "ble_srv_common.h"
#include "ble_advdata.h"
#include "ble_advertising.h"
#include "ble_conn_params.h"
#include "nrf_sdh.h"
#include "nrf_sdh_soc.h"
#include "nrf_sdh_ble.h"
#include "app_timer.h"
#include "fds.h"
#include "peer_manager.h"
#include "peer_manager_handler.h"
#include "bsp_btn_ble.h"
#include "sensorsim.h"
#include "ble_conn_state.h"
#include "nrf_ble_gatt.h"
#include "nrf_ble_qwr.h"
#include "nrf_pwr_mgmt.h"
#include "nrf_drv_gpiote.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "ble_cus.h"
#include "nrf_drv_clock.h"
#include "nrf_soc.h"
#include "nrf_delay.h"
#include "app_pwm.h"
#include "bsp.h"

#include "nrf_drv_saadc.h"
#include "boards.h"
#include "app_error.h"
#include "app_util_platform.h"


#include "app_util.h"
#include "nrf_fstorage.h"
#include "nrf_fstorage_sd.h"



#define APP_BLE_CONN_CFG_TAG    1



#define SAMPLES_IN_BUFFER 1



/* Defined in cli.c */
extern void cli_init(void);
extern void cli_start(void);
extern void cli_process(void);

static void fstorage_evt_handler(nrf_fstorage_evt_t * p_evt);


NRF_FSTORAGE_DEF(nrf_fstorage_t fstorage) =
{
    /* Set a handler for fstorage events. */
    .evt_handler = fstorage_evt_handler,

    /* These below are the boundaries of the flash space assigned to this instance of fstorage.
     * You must set these manually, even at runtime, before nrf_fstorage_init() is called.
     * The function nrf5_flash_end_addr_get() can be used to retrieve the last address on the
     * last page of flash available to write data. */
    .start_addr = 0xf4000,
    .end_addr   = 0xf4fff,
};




volatile uint8_t state = 1;

static nrf_saadc_value_t     m_buffer_pool[2][SAMPLES_IN_BUFFER];
static uint32_t              m_adc_evt_counter;

uint16_t adc_result = 0;
uint16_t adc_voltage_mv = 0;
int percentage=0;
uint16_t Max_Value = 4200;



// 14bit
// V(P) = RESULT x REFERENCE / ( GAIN x RESOLUTION) = RESULT x (600 / (1/6 x 2^(14)) =  ADC_RESULT x 0.2197265625;
//#define ADC_RESULT_IN_MILLI_VOLTS(ADC_RESULT) ((ADC_RESULT * 0.2197265625))
//#define ADC_RESULT_IN_MILLI_VOLTS(ADC_RESULT) ((ADC_RESULT * 3.53080568))
#define ADC_RESULT_IN_MILLI_VOLTS(ADC_RESULT) ((ADC_RESULT * 3.578732106))


#define DEVICE_NAME                     "Muqarrab"                            /**< Name of device. Will be included in the advertising data. */
#define MANUFACTURER_NAME               "Rahman"                   /**< Manufacturer. Will be passed to Device Information Service. */
#define MODEL_NUMBER                    "Pro"                   
#define SERIAL_NUMBER                   "16121994"                   
#define HARDWARE_NUMBER                 "Pro"                   
#define FIRMWARE_NUMBER                 "5.0"                   



#define APP_ADV_INTERVAL                300                                     /**< The advertising interval (in units of 0.625 ms. This value corresponds to 187.5 ms). */

#define APP_ADV_DURATION                0                                       /**< The advertising duration (180 seconds) in units of 10 milliseconds. */
#define APP_BLE_OBSERVER_PRIO           3                                       /**< Application's BLE observer priority. You shouldn't need to modify this value. */
#define APP_BLE_CONN_CFG_TAG            1                                       /**< A tag identifying the SoftDevice BLE configuration. */

#define MIN_CONN_INTERVAL               MSEC_TO_UNITS(100, UNIT_1_25_MS)        /**< Minimum acceptable connection interval (0.1 seconds). */
#define MAX_CONN_INTERVAL               MSEC_TO_UNITS(200, UNIT_1_25_MS)        /**< Maximum acceptable connection interval (0.2 second). */
#define SLAVE_LATENCY                   0                                       /**< Slave latency. */
#define CONN_SUP_TIMEOUT                MSEC_TO_UNITS(4000, UNIT_10_MS)         /**< Connection supervisory timeout (4 seconds). */

#define FIRST_CONN_PARAMS_UPDATE_DELAY  APP_TIMER_TICKS(5000)                   /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */
#define NEXT_CONN_PARAMS_UPDATE_DELAY   APP_TIMER_TICKS(30000)                  /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */
#define MAX_CONN_PARAMS_UPDATE_COUNT    3                                       /**< Number of attempts before giving up the connection parameter negotiation. */

#define SEC_PARAM_BOND                  1                                       /**< Perform bonding. */
#define SEC_PARAM_MITM                  0                                       /**< Man In The Middle protection not required. */
#define SEC_PARAM_LESC                  0                                       /**< LE Secure Connections not enabled. */
#define SEC_PARAM_KEYPRESS              0                                       /**< Keypress notifications not enabled. */
#define SEC_PARAM_IO_CAPABILITIES       BLE_GAP_IO_CAPS_NONE                    /**< No I/O capabilities. */
#define SEC_PARAM_OOB                   0                                       /**< Out Of Band data not available. */
#define SEC_PARAM_MIN_KEY_SIZE          7                                       /**< Minimum encryption key size. */
#define SEC_PARAM_MAX_KEY_SIZE          16                                      /**< Maximum encryption key size. */

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


#define Signal_LED            NRF_GPIO_PIN_MAP(1,10)
#define State_LED             NRF_GPIO_PIN_MAP(1,11)  


#define Servo_Pin             NRF_GPIO_PIN_MAP(0,3)
#define Blocker_Pin           NRF_GPIO_PIN_MAP(1,14)

#define TIME_PERIOD  20000 // 20 milliseconds

int check_battery=0;

int servo_lock_counter=2;   
int servo_unlock_counter=2;


int servo_delay=1000;
int blocker_delay=1000;
int Blocker_on=0;

uint8_t counter_test;
uint8_t counter_l_u=0x52;

uint8_t reset_counter_test;
uint8_t counter_r=0x02;


NRF_BLE_GATT_DEF(m_gatt);                                                       /**< GATT module instance. */
NRF_BLE_QWR_DEF(m_qwr);                                                         /**< Context for the Queued Write module.*/
BLE_ADVERTISING_DEF(m_advertising);                                             /**< Advertising module instance. */

BLE_CUS_DEF(m_cus);

// Create a pwm instance by passing the name of the handle and the timer to be used for pwm generation
// here 1 means timer 1
APP_PWM_INSTANCE(PWM1, 1);

APP_TIMER_DEF(Delay_Event);  

ble_cus_t * p_cus;

/**@brief Timeout handler for the single shot timer.
 */

static uint16_t m_conn_handle = BLE_CONN_HANDLE_INVALID;                        /**< Handle of the current connection. */

/* YOUR_JOB: Declare all services structure your application is using
 *  BLE_XYZ_DEF(m_xyz);
 */

// YOUR_JOB: Use UUIDs for service(s) used in your application.
static ble_uuid_t m_adv_uuids[] =                                               /**< Universally unique service identifiers. */
{
{BLE_UUID_DEVICE_INFORMATION_SERVICE, BLE_UUID_TYPE_BLE},    
// YOUR_JOB: Use UUIDs for service(s) used in your application.
{CUSTOM_SERVICE_UUID, BLE_UUID_TYPE_VENDOR_BEGIN } /**< Universally unique service identifiers. */

};

/////////////////////////////////////////////////////////////////// Keys Part Start  ////////////////////////////////////////////////////////////

uint8_t masterkey1  = 10;
uint8_t masterkey2  = 10;
uint8_t regularkey1 = 10;
uint8_t regularkey2 = 10;

int feedback=0;
int masterokforeg=0;
int regchange=0;
int regchgc=0;
int masterchange=0;   
int masterchgc=0;
uint8_t masterkeyinput;
uint8_t regularkeyinput;
uint8_t keycheck;
int regularchk=0;
int masterchk=0;

/////////////////////////////////////////////////////////////////// Keys Part End  ////////////////////////////////////////////////////////////


////////////////////////////////////////////////////////////////// Regular checks End   //////////////////////////////////////////////////////////

int adv_off = 0 ;
int wrong_counter_reg=0;
int wrong_counter_master=0;
int no_of_tries=10;

int indicator_counter_1 = 0 ;
int indicator_counter_2 = 0 ;

int notify_check=0;
uint8_t notify_value=0;


////////////////////////////////////////////////////////////////// Regular checks ///////////////////////////////////////////////////////////

int regular_chk = 0;
int master_chk = 0;

int Disconnect_Lock=1;
int verified_lock=0;    

int Smart_key_State=0;
int Car_Type=1;

int push_state_chk=0;
int push_state_counter=0;
int push_state_change=0;

int indicator_speed=0;
int indicator_counter=0;

int verified_engine_kill=0;     
int Engin_Kill_Setting=0;
int Engin_Kill_Time=1;
int toggle_flash=0;
int indicator_toggle=0;
int i_counter=0;

int regular_key_expire=0;
int share_check=0;

int prox_stop_value=0;
int prox_stop_timer=5000;
int prox_toggle=0;
int prox_counter=1;


int Door_Status=3;      //3 for Lock 4 for unlock
int feedback_wire=2;    //1 for Unlock 2 for Lock
int door_update=2;      //1 for Unlock 2 for Lock
int Lock_Wires=2;       
int stop_delay=0;

////////////////////////////////////////////////////////////////// Regular checks End///////////////////////////////////////////////////////////

////////////////////////////////////////////////////////////////// Characters input ///////////////////////////////////////////////////////////

uint8_t lock_engine_test=0;
uint8_t lock_engine=0;

uint8_t self_start_test=0;
uint8_t self_start=0;

int start_on_check=0;
int start_check=0;
int start_timer = 750;

uint8_t timer_test=0;
uint8_t timer=0x13;

int push_power_on=0;

uint8_t setting_test=0;
uint8_t setting=0x01;
uint8_t test_bit=0;


///////////////////////////////////////////////////////////////   Connection Checks   //////////////////////////////////////////////////////////////
int connection_state=0;
int toggle=0;
int pins_chk=0;
int blink_time=1000;

uint8_t retain_on=0;                     //////// 1st bit For Engine Kill
                                       //////// 2nd bit For Smart Key


uint8_t retain_test_bit=0;


char      SNV_Data[]   ="Muqarrab112";
char Test_SNV_Data[]   ="11223344556";


/////////////////////////////////////////////////////////////////////////////// SNV

void write_SNV()
{
    ret_code_t rc;
    //SNV_Data[0]=0xEE;



    sd_flash_page_erase(0xf4);

    NRF_LOG_INFO("Writing \"%s\" to flash.", SNV_Data);
    rc = nrf_fstorage_write(&fstorage, 0xf4000, SNV_Data, sizeof(SNV_Data), NULL);
    APP_ERROR_CHECK(rc);

    wait_for_flash_ready(&fstorage);
    NRF_LOG_INFO("Writing Done");

}

uint32_t read_SNV()
{
    ret_code_t rc;

    rc = nrf_fstorage_read(&fstorage, 0xf4000, Test_SNV_Data, sizeof(Test_SNV_Data));
    APP_ERROR_CHECK(rc);


    NRF_LOG_INFO("Reading from flash hex:");
    for(uint8_t i=0; i<sizeof(Test_SNV_Data); i++)
    {
        NRF_LOG_RAW_INFO("%02x:", Test_SNV_Data[i]);
    //    NRF_LOG_INFO("Reading from flash char Hex %h :",Test_SNV_Data[i] );
    }

    NRF_LOG_RAW_INFO("\r\n");
    NRF_LOG_INFO("Reading from flash char:");
    for(uint8_t i=0; i<sizeof(Test_SNV_Data); i++)
    {
        NRF_LOG_RAW_INFO("%c", Test_SNV_Data[i]);
    }
    NRF_LOG_RAW_INFO("\r\n");

    NRF_LOG_INFO("Reading Done");
}
/////////////////////////////////////////////////////////////////////////////// SNV

/////////////////////////////////////////////////////////////////////////////// Charcteristics Initialize
void Charcteristics_Init(ble_cus_t * d_cus)
{
  p_cus=d_cus;

  ble_cus_custom_value_update(p_cus, 0,1);
  ble_cus_custom_value_update(p_cus, 0,2);
  ble_cus_custom_value_update(p_cus, 0,3);
  ble_cus_custom_value_update(p_cus, 0x22,4);
  ble_cus_custom_value_update(p_cus, 0,5);
  ble_cus_custom_value_update(p_cus, 0,6);
  ble_cus_custom_value_update(p_cus, 0,7);
  ble_cus_custom_value_update(p_cus, 0,8);
  ble_cus_custom_value_update(p_cus, 0,9);
  ble_cus_custom_value_update(p_cus, 0,10);
}

void Charcteristics_4(uint8_t test)
{
    lock_engine_test=test;
    ret_code_t         err_code;
     if(regular_chk==1)
     {
  //////////////////     Lock     ///////////////////////
       if (lock_engine_test == 1)
       {
           if(servo_lock_counter==1)
           {     
              NRF_LOG_INFO("Lock Counter : %d",servo_lock_counter);

              nrf_gpio_pin_set(Signal_LED);

              while(app_pwm_channel_duty_set(&PWM1, 0, 5) == NRF_ERROR_BUSY);
              nrf_delay_ms(500); // half second delay after every step
              while(app_pwm_channel_duty_set(&PWM1, 0, 6) == NRF_ERROR_BUSY);
              nrf_delay_ms(500);

              nrf_gpio_pin_clear(Signal_LED);
           }       
           else if(servo_lock_counter==2)
           {     
              NRF_LOG_INFO("Lock Counter : %d",servo_lock_counter);

              nrf_gpio_pin_set(Signal_LED);

              while(app_pwm_channel_duty_set(&PWM1, 0, 4) == NRF_ERROR_BUSY);
              nrf_delay_ms(500); // half second delay after every step
              while(app_pwm_channel_duty_set(&PWM1, 0, 6) == NRF_ERROR_BUSY);
              nrf_delay_ms(500);

              nrf_gpio_pin_clear(Signal_LED);
           }       
           else if(servo_lock_counter==3)
           {     
              NRF_LOG_INFO("Lock Counter : %d",servo_lock_counter);

              nrf_gpio_pin_set(Signal_LED);

              while(app_pwm_channel_duty_set(&PWM1, 0, 3) == NRF_ERROR_BUSY);
              nrf_delay_ms(500); // half second delay after every step
              while(app_pwm_channel_duty_set(&PWM1, 0, 6) == NRF_ERROR_BUSY);
              nrf_delay_ms(500);

              nrf_gpio_pin_clear(Signal_LED);
           }       
           else if(servo_lock_counter==4)
           {     
              NRF_LOG_INFO("Lock Counter : %d",servo_lock_counter);

              nrf_gpio_pin_set(Signal_LED);

              while(app_pwm_channel_duty_set(&PWM1, 0, 2) == NRF_ERROR_BUSY);
              nrf_delay_ms(500); // half second delay after every step
              while(app_pwm_channel_duty_set(&PWM1, 0, 6) == NRF_ERROR_BUSY);
              nrf_delay_ms(500);

              nrf_gpio_pin_clear(Signal_LED);
           }       
          lock_engine=lock_engine&0xF0;
          lock_engine=lock_engine|0x03;      
          ble_cus_custom_value_update(p_cus,lock_engine,4);
       }
  //////////////////     UnLock   ///////////////////////
       else if (lock_engine_test == 2)
       {
           if(servo_unlock_counter==1)
           {     
              NRF_LOG_INFO("Unlock Counter : %d",servo_unlock_counter);

              nrf_gpio_pin_set(Signal_LED);

              while(app_pwm_channel_duty_set(&PWM1, 0, 7) == NRF_ERROR_BUSY);
              nrf_delay_ms(500); // half second delay after every step
              while(app_pwm_channel_duty_set(&PWM1, 0, 6) == NRF_ERROR_BUSY);
              nrf_delay_ms(500);

              nrf_gpio_pin_clear(Signal_LED);
           }       
           else if(servo_unlock_counter==2)
           {     
              NRF_LOG_INFO("Unlock Counter : %d",servo_unlock_counter);

              nrf_gpio_pin_set(Signal_LED);

              while(app_pwm_channel_duty_set(&PWM1, 0, 8) == NRF_ERROR_BUSY);
              nrf_delay_ms(500); // half second delay after every step
              while(app_pwm_channel_duty_set(&PWM1, 0, 6) == NRF_ERROR_BUSY);
              nrf_delay_ms(500);

              nrf_gpio_pin_clear(Signal_LED);
           }       
           else if(servo_unlock_counter==3)
           {     
              NRF_LOG_INFO("Unlock Counter : %d",servo_unlock_counter);

              nrf_gpio_pin_set(Signal_LED);

              while(app_pwm_channel_duty_set(&PWM1, 0, 9) == NRF_ERROR_BUSY);
              nrf_delay_ms(500); // half second delay after every step
              while(app_pwm_channel_duty_set(&PWM1, 0, 6) == NRF_ERROR_BUSY);
              nrf_delay_ms(500);

              nrf_gpio_pin_clear(Signal_LED);
           }       
           else if(servo_unlock_counter==4)
           {     
              NRF_LOG_INFO("Unlock Counter : %d",servo_unlock_counter);

              nrf_gpio_pin_set(Signal_LED);

              while(app_pwm_channel_duty_set(&PWM1, 0, 10) == NRF_ERROR_BUSY);
              nrf_delay_ms(500); // half second delay after every step
              while(app_pwm_channel_duty_set(&PWM1, 0, 6) == NRF_ERROR_BUSY);
              nrf_delay_ms(500);

              nrf_gpio_pin_clear(Signal_LED);
           }
       }
       else if (lock_engine_test == 10)
       {
              nrf_gpio_pin_set(Signal_LED);

              while(app_pwm_channel_duty_set(&PWM1, 0, 6) == NRF_ERROR_BUSY);
              nrf_delay_ms(500);

              nrf_gpio_pin_clear(Signal_LED);

       }
   //////////////////     Trunk   ///////////////////////
       else if (lock_engine_test == 5)
       {
          nrf_gpio_pin_set(Signal_LED);
          nrf_gpio_pin_set(Blocker_Pin);
          nrf_delay_ms(2000);
          nrf_gpio_pin_clear(Blocker_Pin);
          nrf_gpio_pin_clear(Signal_LED);

          lock_engine=lock_engine&0x0F;
          lock_engine=lock_engine|0x10;      
          ble_cus_custom_value_update(p_cus,lock_engine,4);
       }
     }
     ble_cus_custom_value_update(p_cus,lock_engine,4);
}
void Charcteristics_5(uint8_t test)
{
    counter_test=test;
    ret_code_t         err_code;
    // if(regular_chk==1)
     {
//////////////////     Lock Counter     ///////////////////////

     if (counter_test == 0)
     {
       nrf_gpio_pin_set(Signal_LED);
       nrf_delay_ms(500);
       nrf_gpio_pin_clear(Signal_LED);

       servo_lock_counter=1;
       counter_l_u=counter_l_u&0xF0;
       counter_l_u=counter_l_u|0x01;      
       ble_cus_custom_value_update(p_cus,counter_l_u,5);
     }
     else if (counter_test == 1)
     {
       nrf_gpio_pin_set(Signal_LED);
       nrf_delay_ms(500);
       nrf_gpio_pin_clear(Signal_LED);

       servo_lock_counter=2;
       counter_l_u=counter_l_u&0xF0;
       counter_l_u=counter_l_u|0x02;      
       ble_cus_custom_value_update(p_cus,counter_l_u,5);
     }
     else if (counter_test == 2)
     {
       nrf_gpio_pin_set(Signal_LED);
       nrf_delay_ms(500);
       nrf_gpio_pin_clear(Signal_LED);

       servo_lock_counter=3;
       counter_l_u=counter_l_u&0xF0;
       counter_l_u=counter_l_u|0x03;      
       ble_cus_custom_value_update(p_cus,counter_l_u,5);
     }
     else if (counter_test == 3)
     {
       nrf_gpio_pin_set(Signal_LED);
       nrf_delay_ms(500);
       nrf_gpio_pin_clear(Signal_LED);

       servo_lock_counter=4;
       counter_l_u=counter_l_u&0xF0;
       counter_l_u=counter_l_u|0x04;      
       ble_cus_custom_value_update(p_cus,counter_l_u,5);
     }
//////////////////     Unlock Counter     ///////////////////////

     else if (counter_test == 10)
     {
       nrf_gpio_pin_set(Signal_LED);
       nrf_delay_ms(500);
       nrf_gpio_pin_clear(Signal_LED);

       servo_unlock_counter=1;
       counter_l_u=counter_l_u&0x0F;
       counter_l_u=counter_l_u|0x10;      
       ble_cus_custom_value_update(p_cus,counter_l_u,5);
     }
     else if (counter_test == 11)
     {
       nrf_gpio_pin_set(Signal_LED);
       nrf_delay_ms(500);
       nrf_gpio_pin_clear(Signal_LED);

       servo_unlock_counter=2;
       counter_l_u=counter_l_u&0x0F;
       counter_l_u=counter_l_u|0x20;      
       ble_cus_custom_value_update(p_cus,counter_l_u,5);
     }       
     else if (counter_test == 12)
     {
       nrf_gpio_pin_set(Signal_LED);
       nrf_delay_ms(500);
       nrf_gpio_pin_clear(Signal_LED);

       servo_unlock_counter=3;
       counter_l_u=counter_l_u&0x0F;
       counter_l_u=counter_l_u|0x30;      
       ble_cus_custom_value_update(p_cus,counter_l_u,5);
     }       
     else if (counter_test == 13)
     {
       nrf_gpio_pin_set(Signal_LED);
       nrf_delay_ms(500);
       nrf_gpio_pin_clear(Signal_LED);

       servo_unlock_counter=4;
       counter_l_u=counter_l_u&0x0F;
       counter_l_u=counter_l_u|0x40;      
       ble_cus_custom_value_update(p_cus,counter_l_u,5);
     }       
 
//     if(osal_snv_write( 0xF5, 8,  &counter_l_u)==SUCCESS)
//      {
//      } 
     }
 
     ble_cus_custom_value_update(p_cus,counter_l_u,5);
}
void Charcteristics_6(uint8_t test)
{
}
void Charcteristics_7(uint8_t test)
{
ret_code_t         err_code;
}

void Charcteristics_8(uint8_t test)
{
    ret_code_t         err_code;
    err_code = nrf_drv_saadc_sample();
    APP_ERROR_CHECK(err_code);
}

void Charcteristics_9(uint8_t test)
{
    NRF_LOG_INFO("Memory Function");

    SNV_Data[0]=0xEE;
    write_SNV();
    read_SNV();
    ble_cus_custom_value_update(p_cus,5,9);

}
void Charcteristics_10(uint8_t test)
{
}
void battery_calculation()
{
    uint16_t t_adc=0;
    t_adc=adc_result;

    adc_voltage_mv = ADC_RESULT_IN_MILLI_VOLTS(t_adc);
    adc_voltage_mv=adc_voltage_mv*2;

    if(adc_voltage_mv>4200)
    {
     percentage=255;
    }   
    else if(adc_voltage_mv>4100&&adc_voltage_mv<=4200)
    {
     percentage=100;
    }
    else if(adc_voltage_mv>4000&&adc_voltage_mv<=4100)
    {
     percentage=90;
    }
    else if(adc_voltage_mv>3900&&adc_voltage_mv<=4000)
    {
    percentage=80;
    }
    else if(adc_voltage_mv>3800&&adc_voltage_mv<=3900)
    {
     percentage=70;
    }
    else if(adc_voltage_mv>3700&&adc_voltage_mv<=3800)
    {
    percentage=60;
    }
    else if(adc_voltage_mv>3600&&adc_voltage_mv<=3700)
    {
     percentage=50;
    }
    else if(adc_voltage_mv>3500&&adc_voltage_mv<=3600)
    {
    percentage=40;
    }
    else if(adc_voltage_mv>3400&&adc_voltage_mv<=3500)
    {
     percentage=30;
    }
    else if(adc_voltage_mv>3300&&adc_voltage_mv<=3400)
    {
    percentage=10;
    }
    else if(adc_voltage_mv<3300)
    {
    percentage=0;
    }

    NRF_LOG_INFO("Voltage         : %d mV", adc_voltage_mv);
    NRF_LOG_INFO("Percentage      : %d %", percentage);
    NRF_LOG_INFO("--------------------------------------");

    ble_cus_custom_value_update(p_cus,percentage,8);
}



/////////////////////////////////////////////////////////////////////////////// Charcteristics Functions


static void Delay_Event_handler(void * p_context)
{
    ret_code_t err_code;
}

static void advertising_start(bool erase_bonds);


/**@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 handling Peer Manager events.
 *
 * @param[in] p_evt  Peer Manager event.
 */
static void pm_evt_handler(pm_evt_t const * p_evt)
{
    pm_handler_on_pm_evt(p_evt);
    pm_handler_flash_clean(p_evt);

    switch (p_evt->evt_id)
    {
        case PM_EVT_PEERS_DELETE_SUCCEEDED:
            advertising_start(false);
        break;

        case PM_EVT_CONN_SEC_CONFIG_REQ:
        {
            // Allow pairing request from an already bonded peer.
            pm_conn_sec_config_t conn_sec_config = {.allow_repairing = true};
            pm_conn_sec_config_reply(p_evt->conn_handle, &conn_sec_config);
        } 
        break;

        default:
            break;
    }
}


/**@brief Function for the Timer initialization.
 *
 * @details Initializes the timer module. This creates and starts application timers.
 */
static void timers_init(void)
{
    // Initialize timer module.
    ret_code_t err_code = app_timer_init();
    APP_ERROR_CHECK(err_code);


    err_code = app_timer_create(&Delay_Event,
                                APP_TIMER_MODE_SINGLE_SHOT,
                                Delay_Event_handler);
    APP_ERROR_CHECK(err_code);


    // Create timers.

    /* YOUR_JOB: Create any timers to be used by the application.
                 Below is an example of how to create a timer.
                 For every new timer needed, increase the value of the macro APP_TIMER_MAX_TIMERS by
                 one.
       ret_code_t err_code;
       err_code = app_timer_create(&m_app_timer_id, APP_TIMER_MODE_REPEATED, timer_timeout_handler);
       APP_ERROR_CHECK(err_code); */
}


/**@brief Function for the GAP initialization.
 *
 * @details This function sets up all the necessary GAP (Generic Access Profile) parameters of the
 *          device including the device name, appearance, and the preferred connection parameters.
 */
static void gap_params_init(void)
{
    ret_code_t              err_code;
    ble_gap_conn_params_t   gap_conn_params;
    ble_gap_conn_sec_mode_t sec_mode;
    security_req_t level;


    BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);

    err_code = sd_ble_gap_device_name_set(&sec_mode,
                                          (const uint8_t *)DEVICE_NAME,
                                          strlen(DEVICE_NAME));
    APP_ERROR_CHECK(err_code);

    /* YOUR_JOB: Use an appearance value matching the application's use case.
       err_code = sd_ble_gap_appearance_set(BLE_APPEARANCE_);
       APP_ERROR_CHECK(err_code); */

    memset(&gap_conn_params, 0, sizeof(gap_conn_params));

    gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
    gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
    gap_conn_params.slave_latency     = SLAVE_LATENCY;
    gap_conn_params.conn_sup_timeout  = CONN_SUP_TIMEOUT;

    err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
    APP_ERROR_CHECK(err_code);



}
/**@brief Function for initializing the GATT module.
 */
static void gatt_init(void)
{
    ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, NULL);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for handling Queued Write Module errors.
 *
 * @details A pointer to this function will be passed to each service which may need to inform the
 *          application about an error.
 *
 * @param[in]   nrf_error   Error code containing information about what went wrong.
 */
static void nrf_qwr_error_handler(uint32_t nrf_error)
{
    APP_ERROR_HANDLER(nrf_error);
}


/**@brief Function for handling the YYY Service events.
 * YOUR_JOB implement a service handler function depending on the event the service you are using can generate
 *
 * @details This function will be called for all YY Service events which are passed to
 *          the application.
 *
 * @param[in]   p_yy_service   YY Service structure.
 * @param[in]   p_evt          Event received from the YY Service.
 *
 *
static void on_yys_evt(ble_yy_service_t     * p_yy_service,
                       ble_yy_service_evt_t * p_evt)
{
    switch (p_evt->evt_type)
    {
        case BLE_YY_NAME_EVT_WRITE:
            APPL_LOG("[APPL]: charact written with value %s. ", p_evt->params.char_xx.value.p_str);
            break;

        default:
            // No implementation needed.
            break;
    }
}
*/

/**@brief Function for initializing services that will be used by the application.
 */
static void services_init(void)
{

/* YOUR_JOB: Add code to initialize the services used by the application.*/
    ret_code_t         err_code;
    ble_cus_init_t     cus_init;
    ble_dis_init_t     dis_init;
    nrf_ble_qwr_init_t qwr_init = {0};


     // Initialize CUS Service init structure to zero.
    memset(&cus_init, 0, sizeof(cus_init));
	
     // Initialize Queued Write Module.
    qwr_init.error_handler = nrf_qwr_error_handler;

    err_code = nrf_ble_qwr_init(&m_qwr, &qwr_init);
    APP_ERROR_CHECK(err_code);

    // Initialize Device Information Service.
    memset(&dis_init, 0, sizeof(dis_init));


    ble_gap_addr_t ble_addr;
    sd_ble_gap_addr_get(&ble_addr);

    uint64_t MANUFACTURER_ID;
    uint32_t ORG_UNIQUE_ID;

    MANUFACTURER_ID=ble_addr.addr[2];
    MANUFACTURER_ID=(MANUFACTURER_ID*0x100)+ble_addr.addr[1];
    MANUFACTURER_ID=(MANUFACTURER_ID*0x100)+ble_addr.addr[0];

    ORG_UNIQUE_ID=ble_addr.addr[5];
    ORG_UNIQUE_ID=(ORG_UNIQUE_ID*0x100)+ble_addr.addr[4];
    ORG_UNIQUE_ID=(ORG_UNIQUE_ID*0x100)+ble_addr.addr[3];


    ble_dis_sys_id_t system_id;
    system_id.manufacturer_id            = MANUFACTURER_ID;
    system_id.organizationally_unique_id = ORG_UNIQUE_ID;
    dis_init.p_sys_id                    = &system_id;
    dis_init.dis_char_rd_sec = SEC_OPEN;

    ble_srv_ascii_to_utf8(&dis_init.model_num_str, (char *)MODEL_NUMBER);
    ble_srv_ascii_to_utf8(&dis_init.serial_num_str, (char *)SERIAL_NUMBER);
    ble_srv_ascii_to_utf8(&dis_init.fw_rev_str, (char *)FIRMWARE_NUMBER);
    ble_srv_ascii_to_utf8(&dis_init.hw_rev_str, (char *)HARDWARE_NUMBER);
    ble_srv_ascii_to_utf8(&dis_init.manufact_name_str, (char *)MANUFACTURER_NAME);

    err_code = ble_dis_init(&dis_init);
    APP_ERROR_CHECK(err_code);



    ble_gatts_attr_md_t cccd_md;
    memset(&cccd_md, 0, sizeof(cccd_md));

    BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm);
    BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.write_perm);


    BLE_GAP_CONN_SEC_MODE_SET_ENC_NO_MITM(&cus_init.custom_value_char_attr_md.read_perm);
    BLE_GAP_CONN_SEC_MODE_SET_ENC_NO_MITM(&cus_init.custom_value_char_attr_md.write_perm);

    err_code = ble_cus_init(&m_cus, &cus_init);
    APP_ERROR_CHECK(err_code);
            


    /*
    /* YOUR_JOB: Add code to initialize the services used by the application.
       ble_xxs_init_t                     xxs_init;
       ble_yys_init_t                     yys_init;

       // Initialize XXX Service.
       memset(&xxs_init, 0, sizeof(xxs_init));

       xxs_init.evt_handler                = NULL;
       xxs_init.is_xxx_notify_supported    = true;
       xxs_init.ble_xx_initial_value.level = 100;

       err_code = ble_bas_init(&m_xxs, &xxs_init);
       APP_ERROR_CHECK(err_code);

       // Initialize YYY Service.
       memset(&yys_init, 0, sizeof(yys_init));
       yys_init.evt_handler                  = on_yys_evt;
       yys_init.ble_yy_initial_value.counter = 0;

       err_code = ble_yy_service_init(&yys_init, &yy_init);
       APP_ERROR_CHECK(err_code);
     */



}


/**@brief Function for handling the Connection Parameters Module.
 *
 * @details This function will be called for all events in the Connection Parameters Module which
 *          are passed to the application.
 *          @note All this function does is to disconnect. This could have been done by simply
 *                setting the disconnect_on_fail config parameter, but instead we use the event
 *                handler mechanism to demonstrate its use.
 *
 * @param[in] p_evt  Event received from the Connection Parameters Module.
 */
static void on_conn_params_evt(ble_conn_params_evt_t * p_evt)
{
    ret_code_t err_code;

    if (p_evt->evt_type == BLE_CONN_PARAMS_EVT_FAILED)
    {
        err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_CONN_INTERVAL_UNACCEPTABLE);
        APP_ERROR_CHECK(err_code);
    }
}


/**@brief Function for handling a Connection Parameters error.
 *
 * @param[in] nrf_error  Error code containing information about what went wrong.
 */
static void conn_params_error_handler(uint32_t nrf_error)
{
    APP_ERROR_HANDLER(nrf_error);
}


/**@brief Function for initializing the Connection Parameters module.
 */
static void conn_params_init(void)
{
    ret_code_t             err_code;
    ble_conn_params_init_t cp_init;

    memset(&cp_init, 0, sizeof(cp_init));

    cp_init.p_conn_params                  = NULL;
    cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
    cp_init.next_conn_params_update_delay  = NEXT_CONN_PARAMS_UPDATE_DELAY;
    cp_init.max_conn_params_update_count   = MAX_CONN_PARAMS_UPDATE_COUNT;
    cp_init.start_on_notify_cccd_handle    = BLE_GATT_HANDLE_INVALID;
    cp_init.disconnect_on_fail             = false;
    cp_init.evt_handler                    = on_conn_params_evt;
    cp_init.error_handler                  = conn_params_error_handler;

    err_code = ble_conn_params_init(&cp_init);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for starting timers.
 */
static void application_timers_start(void)
{
    /* YOUR_JOB: Start your timers. below is an example of how to start a timer.
       ret_code_t err_code;
       err_code = app_timer_start(m_app_timer_id, TIMER_INTERVAL, NULL);
       APP_ERROR_CHECK(err_code); */

}


/**@brief Function for putting the chip into sleep mode.
 *
 * @note This function will not return.
 */
static void sleep_mode_enter(void)
{
    ret_code_t err_code;

    err_code = bsp_indication_set(BSP_INDICATE_IDLE);
    APP_ERROR_CHECK(err_code);

    // Prepare wakeup buttons.
    err_code = bsp_btn_ble_sleep_mode_prepare();
    APP_ERROR_CHECK(err_code);

    // Go to system-off mode (this function will not return; wakeup will cause a reset).
    err_code = sd_power_system_off();
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for handling advertising events.
 *
 * @details This function will be called for advertising events which are passed to the application.
 *
 * @param[in] ble_adv_evt  Advertising event.
 */
static void on_adv_evt(ble_adv_evt_t ble_adv_evt)
{
    ret_code_t err_code;

    switch (ble_adv_evt)
    {
        case BLE_ADV_EVT_FAST:
            NRF_LOG_INFO("Fast advertising.");
            err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
            APP_ERROR_CHECK(err_code);
            break;

        case BLE_ADV_EVT_IDLE:
            sleep_mode_enter();
            break;

        default:
            break;
    }
}


/**@brief Function for handling BLE events.
 *
 * @param[in]   p_ble_evt   Bluetooth stack event.
 * @param[in]   p_context   Unused.
 */
static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
{
    ret_code_t err_code = NRF_SUCCESS;

    switch (p_ble_evt->header.evt_id)
    {
        case BLE_GAP_EVT_DISCONNECTED:
            NRF_LOG_INFO("Disconnected.");
            // LED indication will be changed when advertising starts.
//        regular_chk=0;
  //      masterokforeg=0;
    //    connection_state=0;
      //  err_code = app_timer_start(Disconnect_Commands, APP_TIMER_TICKS(3000), NULL);
        break;

        case BLE_GAP_EVT_CONNECTED:
            NRF_LOG_INFO("Connected.");
            err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
            APP_ERROR_CHECK(err_code);
            m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
            err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr, m_conn_handle);
            APP_ERROR_CHECK(err_code);
//      pins_chk=1;
//    connection_state=1;
//  State_LED=1;
//      osal_start_timerEx( simpleBLEPeripheral_TaskID, Regular_Check_Timer ,300000); 



            break;

        case BLE_GAP_EVT_PHY_UPDATE_REQUEST:
        {
            NRF_LOG_DEBUG("PHY update request.");
            ble_gap_phys_t const phys =
            {
                .rx_phys = BLE_GAP_PHY_AUTO,
                .tx_phys = BLE_GAP_PHY_AUTO,
            };
            err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
            APP_ERROR_CHECK(err_code);
        } break;

        case BLE_GATTC_EVT_TIMEOUT:
            // Disconnect on GATT Client timeout event.
            NRF_LOG_DEBUG("GATT Client Timeout.");
            err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
                                             BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
            APP_ERROR_CHECK(err_code);
            break;

        case BLE_GATTS_EVT_TIMEOUT:
            // Disconnect on GATT Server timeout event.
            NRF_LOG_DEBUG("GATT Server Timeout.");
            err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
                                             BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
            APP_ERROR_CHECK(err_code);
            break;

        default:
            // No implementation needed.
            break;
    }
}


/**@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);

    // Register a handler for BLE events.
    NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
}


/**@brief Function for the Peer Manager initialization.
 */
static void peer_manager_init(void)
{
    ble_gap_sec_params_t sec_param;
    ret_code_t           err_code;

    err_code = pm_init();
    APP_ERROR_CHECK(err_code);

    memset(&sec_param, 0, sizeof(ble_gap_sec_params_t));

    // Security parameters to be used for all security procedures.
    sec_param.bond           = SEC_PARAM_BOND;
    sec_param.mitm           = SEC_PARAM_MITM;
    sec_param.lesc           = SEC_PARAM_LESC;
    sec_param.keypress       = SEC_PARAM_KEYPRESS;
    sec_param.io_caps        = SEC_PARAM_IO_CAPABILITIES;
    sec_param.oob            = SEC_PARAM_OOB;
    sec_param.min_key_size   = SEC_PARAM_MIN_KEY_SIZE;
    sec_param.max_key_size   = SEC_PARAM_MAX_KEY_SIZE;
    sec_param.kdist_own.enc  = 1;
    sec_param.kdist_own.id   = 1;
    sec_param.kdist_peer.enc = 1;
    sec_param.kdist_peer.id  = 1;

    err_code = pm_sec_params_set(&sec_param);
    APP_ERROR_CHECK(err_code);

    err_code = pm_register(pm_evt_handler);
    APP_ERROR_CHECK(err_code);
}


/**@brief Clear bond information from persistent storage.
 */
static void delete_bonds(void)
{
    ret_code_t err_code;

    NRF_LOG_INFO("Erase bonds!");

    err_code = pm_peers_delete();
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for handling events from the BSP module.
 *
 * @param[in]   event   Event generated when button is pressed.
 */
static void bsp_event_handler(bsp_event_t event)
{
    ret_code_t err_code;

    switch (event)
    {
        case BSP_EVENT_SLEEP:
            sleep_mode_enter();
            break; // BSP_EVENT_SLEEP

        case BSP_EVENT_DISCONNECT:
            err_code = sd_ble_gap_disconnect(m_conn_handle,
                                             BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
            if (err_code != NRF_ERROR_INVALID_STATE)
            {
                APP_ERROR_CHECK(err_code);
            }
            break; // BSP_EVENT_DISCONNECT

        case BSP_EVENT_WHITELIST_OFF:
            if (m_conn_handle == BLE_CONN_HANDLE_INVALID)
            {
                err_code = ble_advertising_restart_without_whitelist(&m_advertising);
                if (err_code != NRF_ERROR_INVALID_STATE)
                {
                    APP_ERROR_CHECK(err_code);
                }
            }
            break; // BSP_EVENT_KEY_0

        default:
            break;
    }
}

/**@brief Function for initializing the Advertising functionality.
 */
static void advertising_init(void)
{
    ret_code_t             err_code;
    ble_advertising_init_t init;

    memset(&init, 0, sizeof(init));

    init.advdata.name_type               = BLE_ADVDATA_FULL_NAME;
    init.advdata.include_appearance      = true;
    init.advdata.flags                   = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
    init.srdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
    init.srdata.uuids_complete.p_uuids  = m_adv_uuids;

    init.config.ble_adv_fast_enabled  = true;
    init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
    init.config.ble_adv_fast_timeout  = APP_ADV_DURATION;//

    init.evt_handler = on_adv_evt;

    err_code = ble_advertising_init(&m_advertising, &init);
    APP_ERROR_CHECK(err_code);

    ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
}


/**@brief Function for initializing buttons and leds.
 *
 * @param[out] p_erase_bonds  Will be true if the clear bonding button was pressed to wake the application up.
 */
static void buttons_leds_init(bool * p_erase_bonds)
{
    ret_code_t err_code;
    bsp_event_t startup_event;

    err_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, bsp_event_handler);
    APP_ERROR_CHECK(err_code);

    err_code = bsp_btn_ble_init(NULL, &startup_event);
    APP_ERROR_CHECK(err_code);

    *p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
}


/**@brief Function for initializing the nrf log module.
 */
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 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   Sleep until an event is received. */
static void power_manage(void)
{
    (void) sd_app_evt_wait();
}

static void fstorage_evt_handler(nrf_fstorage_evt_t * p_evt)
{
    if (p_evt->result != NRF_SUCCESS)
    {
        NRF_LOG_INFO("--> Event received: ERROR while executing an fstorage operation.");
        return;
    }

    switch (p_evt->id)
    {
        case NRF_FSTORAGE_EVT_WRITE_RESULT:
        {
            NRF_LOG_INFO("--> Event received: wrote %d bytes at address 0x%x.",
                         p_evt->len, p_evt->addr);
        } break;

        case NRF_FSTORAGE_EVT_ERASE_RESULT:
        {
            NRF_LOG_INFO("--> Event received: erased %d page from address 0x%x.",
                         p_evt->len, p_evt->addr);
        } break;

        default:
            break;
    }
}


static void print_flash_info(nrf_fstorage_t * p_fstorage)
{
    NRF_LOG_INFO("========| flash info |========");
    NRF_LOG_INFO("erase unit: \t%d bytes",      p_fstorage->p_flash_info->erase_unit);
    NRF_LOG_INFO("program unit: \t%d bytes",    p_fstorage->p_flash_info->program_unit);
    NRF_LOG_INFO("==============================");
}


void wait_for_flash_ready(nrf_fstorage_t const * p_fstorage)
{
    /* While fstorage is busy, sleep and wait for an event. */
    while (nrf_fstorage_is_busy(p_fstorage))
    {
        power_manage();
    }
}

/**@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();
    }
}


/**@brief Function for starting advertising.
 */
static void advertising_start(bool erase_bonds)
{
    if (erase_bonds == true)
    {
        delete_bonds();
        // Advertising is started by PM_EVT_PEERS_DELETED_SUCEEDED event
    }
    else
    {
        ret_code_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);

        APP_ERROR_CHECK(err_code);
    }
}
/**
 * @brief Function for configuring: PIN_IN pin for input, PIN_OUT pin for output,
 * and configures GPIOTE to give an interrupt on pin change.
 */
static void gpio_init(void)
{
    ret_code_t err_code;

    nrf_gpio_cfg_output(Signal_LED);
    nrf_gpio_cfg_output(State_LED);

    nrf_gpio_cfg_output(Servo_Pin);
    nrf_gpio_cfg_output(Blocker_Pin);

    err_code = nrf_drv_gpiote_init();
    APP_ERROR_CHECK(err_code);

    nrf_drv_gpiote_out_config_t out_config = GPIOTE_CONFIG_OUT_SIMPLE(false);

    nrf_drv_gpiote_in_config_t in_config = GPIOTE_CONFIG_IN_SENSE_TOGGLE(true);
    in_config.pull = NRF_GPIO_PIN_PULLUP;

}

/**@brief Function starting the internal LFCLK oscillator.
 *
 * @details This is needed by RTC1 which is used by the Application Timer
 *          (When SoftDevice is enabled the LFCLK is always running and this is not needed).
 */
static void lfclk_request(void)
{
    ret_code_t err_code = nrf_drv_clock_init();
    APP_ERROR_CHECK(err_code);
    nrf_drv_clock_lfclk_request(NULL);
}
static void pwm_init_f(void)
{
// a variable to hold err_code value
  ret_code_t err_code;

//  create a pwm config struct and pass it the default configurations along with the pin number for pwm and period in microseconds
// here we have configured one channel, we can configure max up to two channels per pwm instance in this library, if we use two channels then we need to pass two pins
  app_pwm_config_t pwm_cfg = APP_PWM_DEFAULT_CONFIG_1CH(TIME_PERIOD, Servo_Pin);

// change the pwm polarity by setting this value so that logic high value is given as active signal and duty is set for the logic high signal
// we can change it to give the active low signal as well for manipulating the logic low duty
  pwm_cfg.pin_polarity[0] = APP_PWM_POLARITY_ACTIVE_HIGH;

// Initialize the pwm and pass it the intance, configurations and handler, we can also write NULL if we don't want to use the handler 
  err_code = app_pwm_init(&PWM1, &pwm_cfg, NULL);
  APP_ERROR_CHECK(err_code);// check if any error occurred during initialization
// enable the pwm signal so that the pwm is started on the specified pin
  app_pwm_enable(&PWM1);
}

void saadc_callback(nrf_drv_saadc_evt_t const * p_event)
{
    ret_code_t err_code;
    uint32_t buffer_samples = 0;

      switch(p_event->type)
      {
        case NRF_DRV_SAADC_EVT_DONE:
        {
          buffer_samples = 0;
          adc_result = 0;

          err_code =nrf_drv_saadc_buffer_convert(p_event->data.done.p_buffer, SAMPLES_IN_BUFFER);     
          APP_ERROR_CHECK(err_code);

          m_adc_evt_counter++;

//          NRF_LOG_INFO("ADC event number: %d", (int)m_adc_evt_counter);

          for (uint8_t i = 0; i < SAMPLES_IN_BUFFER; i++)
          {
              buffer_samples += p_event->data.done.p_buffer[i];
          }

          adc_result = buffer_samples/SAMPLES_IN_BUFFER;
          NRF_LOG_INFO("adc result : %d.", adc_result);
          battery_calculation();
        }
        break;

        default:
          NRF_LOG_INFO("Default Called");
        break;
      
      }
}


void saadc_init(void)
{
    ret_code_t err_code;
    nrf_saadc_channel_config_t channel_config =
    NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_AIN4);

    // changing the saadc resolution to 14bit
    nrf_drv_saadc_config_t saadc_config ;
    saadc_config.resolution = NRF_SAADC_RESOLUTION_14BIT;

    err_code = nrf_drv_saadc_init(NULL, saadc_callback);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_saadc_channel_init(0, &channel_config);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_saadc_buffer_convert(m_buffer_pool[0], SAMPLES_IN_BUFFER);
    APP_ERROR_CHECK(err_code);

//    err_code = nrf_drv_saadc_buffer_convert(m_buffer_pool[1], SAMPLES_IN_BUFFER);
//    APP_ERROR_CHECK(err_code);

}
void fstorage_init_f(void)
{
    ret_code_t rc;

    nrf_fstorage_api_t * p_fs_api;
    p_fs_api = &nrf_fstorage_sd;

    rc = nrf_fstorage_init(&fstorage, p_fs_api, NULL);
    APP_ERROR_CHECK(rc);
}


/**@brief Function for application main entry.
 */
int main(void)
{
    bool erase_bonds;
    // Initialize.
    log_init();
    lfclk_request();
    gpio_init();
    timers_init();
    buttons_leds_init(&erase_bonds);
    power_management_init();
    ble_stack_init();
    gap_params_init();
    gatt_init();
    services_init();
    advertising_init();
    conn_params_init();
    peer_manager_init();
    pwm_init_f();

    saadc_init();

//    cli_init();
    fstorage_init_f();
    
    // Start execution.
    NRF_LOG_INFO("Template example started.");
    application_timers_start();

    advertising_start(erase_bonds);

    uint32_t err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV, m_advertising.adv_handle, 8); 
    APP_ERROR_CHECK(err_code); 

    write_SNV();
    read_SNV();

    Charcteristics_9(5);
/*
    SNV_Data[0]=0xEE;
    write_SNV();
    read_SNV();
    if(Test_SNV_Data[0]==0xEE)
    {
      NRF_LOG_INFO("Template example started.");
    }
*/
    // Enter main loop.
    for (;;)
    {
        idle_state_handle();
    }
}


/**
 * @}
 */

RE: Flash Memory Issue

Simonr — Thu, 12 Nov 2020 08:29:53 GMT

Edvin is on leave for the time being, so I have been assigned to this case while he is away.

Regarding your issue with the Characteristics_9(). When debugging, do you see any kind of error code in either the write_SNV() or read_SNV() functions? Does the application work as intended if just one of these functions are included? What I think is going on is that you try calling wither write or read _SNV before the flash is ready. You need to make sure that the reading/writing is completed and the flash is ready for a new operation first.

Best regards,

Simon

RE: Flash Memory Issue

Muqarrab — Wed, 11 Nov 2020 07:44:14 GMT

[quote userid="26071" url="~/f/nordic-q-a/66816/flash-memory-issue/278192#278192"]Did you find the reason for your previous issue? that the write function returned invalid length?[/quote]

I have changed the data length (set ~12) and it's working now.

[quote userid="26071" url="~/f/nordic-q-a/66816/flash-memory-issue/278192#278192"]

Do you have several (and probably different) implementations of wait_for_flash_ready()?

When you compile it should say something like "your previous definition was here", which points to another place.

[/quote]

NO, I have only one implementation in main.c.

void fstorage_init_f(void)
{
    ret_code_t rc;

    nrf_fstorage_api_t * p_fs_api;
    p_fs_api = &nrf_fstorage_sd;

    rc = nrf_fstorage_init(&fstorage, p_fs_api, NULL);
    APP_ERROR_CHECK(rc);
}

[quote userid="26071" url="~/f/nordic-q-a/66816/flash-memory-issue/278192#278192"]I guess your wait_for_flash_ready() doesn't return, which suggests that you don't get the event. Is that correct? From where do you call Charcteristics_9()? Inside an interrupt, by any chance? Try to call it from your main() function. Does it get executed then?[/quote]

I have called the function in main and its working. But when I write on characteristics and called the same function it does not work. Does any suggestion please?

RE: Flash Memory Issue

Edvin — Tue, 03 Nov 2020 07:41:21 GMT

Did you find the reason for your previous issue? that the write function returned invalid length?

[quote user="muqarrab_rahman"]Why I am getting this warning?[/quote]

Do you have several (and probably different) implementations of wait_for_flash_ready()?

When you compile it should say something like "your previous definition was here", which points to another place.

NO RESPONSE from what function?

[quote user="muqarrab_rahman"]As I comment write_SNV(); read_SNV(); these functions print statment start wotking.
What is the problem? Does any suggestion please?[/quote]

I guess your wait_for_flash_ready() doesn't return, which suggests that you don't get the event. Is that correct? From where do you call Charcteristics_9()? Inside an interrupt, by any chance? Try to call it from your main() function. Does it get executed then?

RE: Flash Memory Issue

Muqarrab — Mon, 02 Nov 2020 13:40:22 GMT

Hi Edvin.

I think flash memory is very sensitive. 🤓
Now I am adding the Flash memory part to my main project.
So here are some new points I want to discuss.

1-I have made these functions to read/write. As per your instruction.

char      SNV_Data[]   ="Muqarrab112";
char Test_SNV_Data[]   ="11223344556";


/////////////////////////////////////////////////////////////////////////////// SNV

void write_SNV()
{
    ret_code_t rc;
    //SNV_Data[0]=0xEE;



    sd_flash_page_erase(0xf4);

    NRF_LOG_INFO("Writing \"%s\" to flash.", SNV_Data);
    rc = nrf_fstorage_write(&fstorage, 0xf4000, SNV_Data, sizeof(SNV_Data), NULL);
    APP_ERROR_CHECK(rc);

    wait_for_flash_ready(&fstorage);
    NRF_LOG_INFO("Writing Done");

}

uint32_t read_SNV()
{
    ret_code_t rc;

    rc = nrf_fstorage_read(&fstorage, 0xf4000, Test_SNV_Data, sizeof(Test_SNV_Data));
    APP_ERROR_CHECK(rc);


    NRF_LOG_INFO("Reading from flash hex:");
    for(uint8_t i=0; i<sizeof(Test_SNV_Data); i++)
    {
        NRF_LOG_RAW_INFO("%02x:", Test_SNV_Data[i]);
    //    NRF_LOG_INFO("Reading from flash char Hex %h :",Test_SNV_Data[i] );
    }

    NRF_LOG_RAW_INFO("\r\n");
    NRF_LOG_INFO("Reading from flash char:");
    for(uint8_t i=0; i<sizeof(Test_SNV_Data); i++)
    {
        NRF_LOG_RAW_INFO("%c", Test_SNV_Data[i]);
    }
    NRF_LOG_RAW_INFO("\r\n");

    NRF_LOG_INFO("Reading Done");
}
/////////////////////////////////////////////////////////////////////////////// SNV

Why I am getting this warning?

2-I am calling these two functions in main and they are working fine.

BUT when I am calling after connection they are not responding anything? NO RESPONSE from this function(When I write on characteristic 9 I call this function) even not print anything.
As I comment write_SNV(); read_SNV(); these functions print statment start wotking.
What is the problem? Does any suggestion please?

void Charcteristics_9(uint8_t test)
{
    NRF_LOG_INFO("Memory Function");

    SNV_Data[0]=0xEE;
    write_SNV();
    read_SNV();
    ble_cus_custom_value_update(p_cus,5,9);

}

[quote userid="26071" url="~/f/nordic-q-a/66816/flash-memory-issue/276371#276371"]The secure_bootloader\pca10056_s140_ble bootloader has a flash start address of 0xf8000. So if you use this one, then it means that the FDS pages are on 0xF7000, 0xF6000 and 0xF5000. You can use 0xF4000->0xF4FFF. [/quote]

I have set the following address to store values.

NRF_FSTORAGE_DEF(nrf_fstorage_t fstorage) =
{
    /* Set a handler for fstorage events. */
    .evt_handler = fstorage_evt_handler,

    /* These below are the boundaries of the flash space assigned to this instance of fstorage.
     * You must set these manually, even at runtime, before nrf_fstorage_init() is called.
     * The function nrf5_flash_end_addr_get() can be used to retrieve the last address on the
     * last page of flash available to write data. */
    .start_addr = 0xf4000,
    .end_addr   = 0xf4fff,
};

Any suggestion,s please?

RE: Flash Memory Issue

Edvin — Mon, 26 Oct 2020 15:27:03 GMT

did you find the reason? I am trying to make you understand what the return value means. Did you check the description above nrf_fstorage_write() in the .h file?

It works now, but you may encounter it later, and come back to us, either with the same issue, or a similar one. I am trying to explain how to debug these kind of return values.

So let me help you. The description of nrf_fstorage_write() says:

/**@brief   Function for writing data to flash.
 *
 * Write @p len bytes from @p p_src to @p dest.
 *
 * When using @ref nrf_fstorage_sd, the data is written by several calls to @ref sd_flash_write if
 * the length of the data exceeds @ref NRF_FSTORAGE_SD_MAX_WRITE_SIZE bytes.
 * Only one event is sent upon completion.
 *
 * @note The data to be written to flash must be kept in memory until the operation has
 *       terminated and an event is received.
 *
 * @param[in]   p_fs        The fstorage instance.
 * @param[in]   dest        Address in flash memory where to write the data.
 * @param[in]   p_src       Data to be written.
 * @param[in]   len         Length of the data (in bytes).
 * @param[in]   p_param     User-defined parameter passed to the event handler (may be NULL).
 *
 * @retval  NRF_SUCCESS                 If the operation was accepted.
 * @retval  NRF_ERROR_NULL              If @p p_fs or @p p_src is NULL.
 * @retval  NRF_ERROR_INVALID_STATE     If the module is not initialized.
 * @retval  NRF_ERROR_INVALID_LENGTH    If @p len is zero or not a multiple of the program unit,
 *                                      or if it is otherwise invalid.
 * @retval  NRF_ERROR_INVALID_ADDR      If the address @p dest is outside the flash memory
 *                                      boundaries specified in @p p_fs, or if it is unaligned.
 * @retval  NRF_ERROR_NO_MEM            If no memory is available to accept the operation.
 *                                      When using the @ref nrf_fstorage_sd, this error
 *                                      indicates that the internal queue of operations is full.
 */
ret_code_t nrf_fstorage_write(nrf_fstorage_t const * p_fs,
                              uint32_t               dest,
                              void           const * p_src,
                              uint32_t               len,
                              void                 * p_param);

What does it say about NRF_ERROR_INVALID_LENGTH? It explains two scenarios, and a hint is that the issue was not that the length was 0, because len was 5. So it is related to the length, right?

RE: Flash Memory Issue

Muqarrab — Mon, 26 Oct 2020 13:53:03 GMT

Hi Edvin
It's STRANGE. I have changed the initializing value and its work.

char      SNV_Data[]   ="Muqarrab112";
char Test_SNV_Data[]   ="Muqarrab112";