hi... i want to store data in flash , i will get the data periodically . Even i am writing data to flash using write command ,when i am trying to print the data which is stored in flash ,while printing the i am getting garbage value . Here is my code .. i am getting value like 0,72,123,0
/**
* Copyright (c) 2017 - 2018, 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.
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*/
#include <stdint.h>
#include <string.h>
#include "nrf.h"
#include "nordic_common.h"
#ifdef SOFTDEVICE_PRESENT
#include "nrf_sdh.h"
#include "nrf_sdh_ble.h"
#else
#include "nrf_drv_clock.h"
#endif
#include "fds.h"
#include "app_timer.h"
#include "app_error.h"
#include "nrf_cli.h"
#include "fds_example.h"
#define NRF_LOG_MODULE_NAME app
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
/* A tag identifying the SoftDevice BLE configuration. */
#define APP_BLE_CONN_CFG_TAG 1
/* Array to map FDS return values to strings. */
char const * fds_err_str[] =
{
"FDS_SUCCESS",
"FDS_ERR_OPERATION_TIMEOUT",
"FDS_ERR_NOT_INITIALIZED",
"FDS_ERR_UNALIGNED_ADDR",
"FDS_ERR_INVALID_ARG",
"FDS_ERR_NULL_ARG",
"FDS_ERR_NO_OPEN_RECORDS",
"FDS_ERR_NO_SPACE_IN_FLASH",
"FDS_ERR_NO_SPACE_IN_QUEUES",
"FDS_ERR_RECORD_TOO_LARGE",
"FDS_ERR_NOT_FOUND",
"FDS_ERR_NO_PAGES",
"FDS_ERR_USER_LIMIT_REACHED",
"FDS_ERR_CRC_CHECK_FAILED",
"FDS_ERR_BUSY",
"FDS_ERR_INTERNAL",
};
/* Array to map FDS events to strings. */
static char const * fds_evt_str[] =
{
"FDS_EVT_INIT",
"FDS_EVT_WRITE",
"FDS_EVT_UPDATE",
"FDS_EVT_DEL_RECORD",
"FDS_EVT_DEL_FILE",
"FDS_EVT_GC",
};
/* Dummy configuration data. */
static configuration_t m_dummy_cfg =
{
.device_name = "999555",
};
/* A record containing dummy configuration data. */
static fds_record_t const m_dummy_record =
{
.file_id = CONFIG_FILE,
.key = CONFIG_REC_KEY,
.data.p_data = &m_dummy_cfg,
/* The length of a record is always expressed in 4-byte units (words). */
.data.length_words = (sizeof(m_dummy_cfg) + 3) / sizeof(uint32_t),
};
/* Keep track of the progress of a delete_all operation. */
static struct
{
bool delete_next; //!< Delete next record.
bool pending; //!< Waiting for an fds FDS_EVT_DEL_RECORD event, to delete the next record.
} m_delete_all;
/* Flag to check fds initialization. */
static bool volatile m_fds_initialized;
static void fds_evt_handler(fds_evt_t const * p_evt)
{
NRF_LOG_GREEN("Event: %s received (%s)",
fds_evt_str[p_evt->id],
fds_err_str[p_evt->result]);
switch (p_evt->id)
{
case FDS_EVT_INIT:
if (p_evt->result == FDS_SUCCESS)
{
m_fds_initialized = true;
}
break;
case FDS_EVT_WRITE:
{
if (p_evt->result == FDS_SUCCESS)
{
NRF_LOG_INFO("Record ID:\t0x%04x", p_evt->write.record_id);
NRF_LOG_INFO("File ID:\t0x%04x", p_evt->write.file_id);
NRF_LOG_INFO("Record key:\t0x%04x", p_evt->write.record_key);
}
} break;
case FDS_EVT_DEL_RECORD:
{
if (p_evt->result == FDS_SUCCESS)
{
NRF_LOG_INFO("Record ID:\t0x%04x", p_evt->del.record_id);
NRF_LOG_INFO("File ID:\t0x%04x", p_evt->del.file_id);
NRF_LOG_INFO("Record key:\t0x%04x", p_evt->del.record_key);
}
m_delete_all.pending = false;
} break;
default:
break;
}
}
/**@brief Begin deleting all records, one by one. */
void delete_all_begin(void)
{
m_delete_all.delete_next = true;
}
/**@brief Process a delete all command.
*
* Delete records, one by one, until no records are left.
*/
void delete_all_process(void)
{
if ( m_delete_all.delete_next
& !m_delete_all.pending)
{
NRF_LOG_INFO("Deleting next record.");
m_delete_all.delete_next = record_delete_next();
if (!m_delete_all.delete_next)
{
NRF_LOG_CYAN("No records left to delete.");
}
}
}
#ifdef SOFTDEVICE_PRESENT
/**@brief Function for initializing the SoftDevice and enabling the BLE stack. */
static void ble_stack_init(void)
{
ret_code_t rc;
uint32_t ram_start;
/* Enable the SoftDevice. */
rc = nrf_sdh_enable_request();
APP_ERROR_CHECK(rc);
rc = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
APP_ERROR_CHECK(rc);
rc = nrf_sdh_ble_enable(&ram_start);
APP_ERROR_CHECK(rc);
}
#else
static void clock_init(void)
{
/* Initialize the clock. */
ret_code_t rc = nrf_drv_clock_init();
APP_ERROR_CHECK(rc);
nrf_drv_clock_lfclk_request(NULL);
/* Wait for the clock to be ready. */
while (!nrf_clock_lf_is_running()) {;}
}
#endif
/**@brief Initialize the timer. */
static void timer_init(void)
{
ret_code_t err_code = app_timer_init();
APP_ERROR_CHECK(err_code);
}
/**@brief Initialize logging. */
static void log_init(void)
{
ret_code_t rc = NRF_LOG_INIT(NULL);
APP_ERROR_CHECK(rc);
}
/**@brief Sleep until an event is received. */
static void power_manage(void)
{
#ifdef SOFTDEVICE_PRESENT
(void) sd_app_evt_wait();
#else
__WFE();
#endif
}
/**@brief Wait for fds to initialize. */
static void wait_for_fds_ready(void)
{
while (!m_fds_initialized)
{
power_manage();
}
}
int main(void)
{
ret_code_t rc;
#ifdef SOFTDEVICE_PRESENT
ble_stack_init();
#else
clock_init();
#endif
timer_init();
log_init();
cli_init();
NRF_LOG_INFO("FDS example started.")
/* Register first to receive an event when initialization is complete. */
(void) fds_register(fds_evt_handler);
NRF_LOG_INFO("Initializing fds...");
rc = fds_init();
APP_ERROR_CHECK(rc);
/* Wait for fds to initialize. */
wait_for_fds_ready();
NRF_LOG_INFO("Available commands:");
NRF_LOG_INFO("- print all\t\tprint records");
NRF_LOG_INFO("- print config\tprint configuration");
NRF_LOG_INFO("- update\t\tupdate configuration");
NRF_LOG_INFO("- stat\t\tshow statistics");
NRF_LOG_INFO("- write\t\twrite a new record");
NRF_LOG_INFO("- delete\t\tdelete a record");
NRF_LOG_INFO("- delete_all\tdelete all records");
NRF_LOG_INFO("- gc\t\trun garbage collection");
NRF_LOG_INFO("Reading flash usage statistics...");
fds_stat_t stat = {0};
rc = fds_stat(&stat);
APP_ERROR_CHECK(rc);
NRF_LOG_INFO("Found %d valid records.", stat.valid_records);
NRF_LOG_INFO("Found %d dirty records (ready to be garbage collected).", stat.dirty_records);
fds_record_desc_t desc = {0};
fds_find_token_t tok = {0};
uint8_t *data;
rc = fds_record_find(CONFIG_FILE, CONFIG_REC_KEY, &desc, &tok);
if (rc == FDS_SUCCESS)
{
/* A config file is in flash. Let's update it. */
fds_flash_record_t config = {0}; //!< Location of the record data in flash.
/* Open the record and read its contents. */
rc = fds_record_open(&desc, &config); //last known locaton of the data in flash
APP_ERROR_CHECK(rc);
if ( rc != FDS_SUCCESS)
{
printf("Data ");
return rc;
}
printf("Found Record ID = %d\r\n",desc.record_id);
data = (uint8_t ) config.p_data;
printf("%d",data);
for (uint8_t i=3;i<config.p_header->length_words;i++)
{
printf("data ");
// printf("%d\n data:",data[i]);
}
/* Copy the configuration from flash into m_dummy_cfg. */
// memcpy(&m_dummy_cfg, config.p_data, sizeof(configuration_t));
// NRF_LOG_INFO("Config file found, updating boot count to %d.", m_dummy_cfg.boot_count);
/* Update boot count. */
// m_dummy_cfg.boot_count++;
/* Close the record when done reading. */
rc = fds_record_close(&desc);
APP_ERROR_CHECK(rc);
/* Write the updated record to flash. */
rc = fds_record_update(&desc, &m_dummy_record);
APP_ERROR_CHECK(rc);
}
else
{
/* System config not found; write a new one. */
NRF_LOG_INFO("Writing config file...");
rc = fds_record_write(&desc, &m_dummy_record);
APP_ERROR_CHECK(rc);
}
cli_start();
/* Enter main loop. */
for (;;)
{
if (!NRF_LOG_PROCESS())
{
power_manage();
}
cli_process();
delete_all_process();
}
}
/**
* @}
*/
