nRF52832 FLASH write issue

[zzzZ]

I want to write a piece of big data to flash.
Every time I write 112 word length, I write it many times.
Every time I write, the address is shifted back 112.
Before I write, I need to erase the pages that need to be written.
However, I find that only the first time I write successfully, but later I write unsuccessfully.
The API I use is sd_flash_write, what's the reason? thank you!

[zzzZ]

#define START_ERASE_PAGE            86

#define OTA_DATA_START_ADDRESS      0x56000

uint8_t *tag_ota_write_addr = (uint8_t *)(OTA_DATA_START_ADDRESS);

void tag_ota_erase(uint8 page)
{
    NRF_LOG_INFO("tag_ota_erase \n");

    for(int i = 0; i < page; i++)
    {
        sd_flash_page_erase(START_ERASE_PAGE + i);
        NRF_LOG_INFO("tag_ota_erase page : %d\n",START_ERASE_PAGE+i);
        nrf_delay_ms(100);
    }
}

At the time of initialization, 10 pages have been erased.

using

tag_ota_erase(10);

[Henry_Chou]

Okay,...So the write words in next address should be empty. It's right. But I suggest that the wait ready function not to apply delay. You may refer the example code \nRF5_SDK_17.0.2_d674dde\examples\peripheral\flash_fstorage

wait_for_flash_ready();

It's the function check for NV timing.

[zzzZ]

Among the APIs used, wait ready function is used

uint32_t sd_flash_write(uint32_t * const p_dst, uint32_t const * const p_src, uint32_t size)
{
    if (size > FLASH_WRITE_MAX_LENGTH)
    {
        return NRF_ERROR_INVALID_LENGTH;
    }

    if (!addr_is_in_FLASH(p_dst))
    {
        return NRF_ERROR_INVALID_ADDR;
    }

    nrf_nvmc_write_words((uint32_t) p_dst, p_src, size);
    m_flash_op_handler(true);
    return NRF_SUCCESS;
}

void nrf_nvmc_write_words(uint32_t address, const uint32_t * src, uint32_t num_words)
{
    uint32_t i;

    // Enable write.
    NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen;
    __ISB();
    __DSB();

    for (i = 0; i < num_words; i++)
    {
        ((uint32_t*)address)[i] = src[i];
        wait_for_flash_ready();
    }

    NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren;
    __ISB();
    __DSB();
}

[Henry_Chou]

You may refer the example flash_fstorage. Your problems can be solved.

[zzzZ]

Thanks！resolved