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!

[Henry_Chou]

May your show your processing code? I can't understand your meaning in your statement.

It's re-write 112 words (uint32_t)in original address , or write next 112 words in next 112 offset address.

[zzzZ]

My code is as below:

#define TEST_LEN    112
#define WRITE_TIME    10
void write_test(void)
{
    uint8 ota_data[TEST_LEN] = {0};

    
    for(int i = 0; i < TEST_LEN; i++)
    {
        ota_data[i] = i;
    }

    for(int i = 0; i < WRITE_TIME; i ++)
    {
        sd_flash_write((uint32_t *)tag_ota_write_addr, (uint32_t *)ota_data, TEST_LEN);

        NRF_LOG_INFO("addr = 0x%x", tag_ota_write_addr);

        tag_ota_write_addr += TEST_LEN;

        nrf_delay_ms(200);
    }
}

[Henry_Chou]

So it's the next 112 words write-cycling. But how about the page erase when you write cross over a page?

[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.