Hi
I am working on nRF52832 , I want to store the data in NVMC . so I am trying to write the data blockwise , I saw the layout each page consists of Block 0-7 .To each block we can write the 512 bytes . how to write the data block wise or page 1
please suggest me
please have a look at code , it is correct ? why my data is updating while reading
/**
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* 1. Redistributions of source code must retain the above copyright notice, this
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*
* 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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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
/** @file
*
* @brief fstorage example main file.
*
* This example showcases fstorage usage.
*/
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include "nrf.h"
#include "nrf_soc.h"
#include "nordic_common.h"
#include "boards.h"
#include "app_timer.h"
#include "app_util.h"
#include "nrf_fstorage.h"
#include "nrf_delay.h"
#ifdef SOFTDEVICE_PRESENT
#include "nrf_sdh.h"
#include "nrf_sdh_ble.h"
#include "nrf_fstorage_sd.h"
#else
#include "nrf_drv_clock.h"
#include "nrf_fstorage_nvmc.h"
#endif
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#define BUTTON_DETECTION_DELAY APP_TIMER_TICKS(50)
#define APP_BLE_CONN_CFG_TAG 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 = 0x3e000,
.end_addr = 0x3ffff,
};
char m_depth[80];
char axis[80];
uint8_t x=0;
int i;
/**@brief Helper function to obtain the last address on the last page of the on-chip flash that
* can be used to write user data.
*/
static uint32_t nrf5_flash_end_addr_get()
{
uint32_t const bootloader_addr = BOOTLOADER_ADDRESS;
uint32_t const page_sz = NRF_FICR->CODEPAGESIZE;
uint32_t const code_sz = NRF_FICR->CODESIZE;
return (bootloader_addr != 0xFFFFFFFF ?
bootloader_addr : (code_sz * page_sz));
}
#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 Sleep until an event is received. */
static void power_manage(void)
{
#ifdef SOFTDEVICE_PRESENT
(void) sd_app_evt_wait();
#else
__WFE();
#endif
}
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();
}
}
static void log_init(void)
{
ret_code_t rc = NRF_LOG_INIT(NULL);
APP_ERROR_CHECK(rc);
}
void test_data()
{
x++;
sprintf(axis,"%d",x);
return axis;
}
int main(void)
{
ret_code_t rc;
#ifndef SOFTDEVICE_PRESENT
clock_init();
#endif
timer_init();
log_init();
cli_init();
NRF_LOG_INFO("fstorage example started.");
nrf_fstorage_api_t * p_fs_api;
#ifdef SOFTDEVICE_PRESENT
NRF_LOG_INFO("SoftDevice is present.");
NRF_LOG_INFO("Initializing nrf_fstorage_sd implementation...");
/* Initialize an fstorage instance using the nrf_fstorage_sd backend.
* nrf_fstorage_sd uses the SoftDevice to write to flash. This implementation can safely be
* used whenever there is a SoftDevice, regardless of its status (enabled/disabled). */
p_fs_api = &nrf_fstorage_sd;
#else
NRF_LOG_INFO("SoftDevice not present.");
NRF_LOG_INFO("Initializing nrf_fstorage_nvmc implementation...");
/* Initialize an fstorage instance using the nrf_fstorage_nvmc backend.
* nrf_fstorage_nvmc uses the NVMC peripheral. This implementation can be used when the
* SoftDevice is disabled or not present.
*
* Using this implementation when the SoftDevice is enabled results in a hardfault. */
p_fs_api = &nrf_fstorage_nvmc;
#endif
rc = nrf_fstorage_init(&fstorage, p_fs_api, NULL);
APP_ERROR_CHECK(rc);
print_flash_info(&fstorage);
/* It is possible to set the start and end addresses of an fstorage instance at runtime.
* They can be set multiple times, should it be needed. The helper function below can
* be used to determine the last address on the last page of flash memory available to
* store data. */
(void) nrf5_flash_end_addr_get();
/* Let's write to flash. */
#ifdef SOFTDEVICE_PRESENT
/* Enable the SoftDevice and the BLE stack. */
NRF_LOG_INFO("Enabling the SoftDevice.");
ble_stack_init();
m_data = 0xDEADBEEF;
#endif
while(1)
{
test_data();
rc = nrf_fstorage_write(&fstorage, 0x3f000,&axis, sizeof(axis), NULL);
APP_ERROR_CHECK(rc);
if(rc==NRF_SUCCESS)
{
printf("write data to flash :%s\n",axis);
}
wait_for_flash_ready(&fstorage);
NRF_LOG_INFO("Done.");
nrf_delay_ms(2000);
rc = nrf_fstorage_read(&fstorage, 0x3f000,m_depth,sizeof(m_depth));
APP_ERROR_CHECK(rc);
if(rc==NRF_SUCCESS)
{
printf("read from flash:%s\n",m_depth);
}
}
cli_start();
/* Enter main loop. */
for (;;)
{
if (!NRF_LOG_PROCESS())
{
power_manage();
}
cli_process();
}
}
/**
* @}
*/
