52833 write flash error

[yangyongkai]

    #define SIZE 10
    int i;
    int8_t ret;
    int main_addr_buff,backup_addr_buff;
    int write_buff[SIZE];
    for(i=0;i<SIZE;i++){
        write_buff[i] = 10+i;
    }
    if((ret = nrf_fstorage_erase(&fstorage, 0x74000, 1, NULL)) != NRF_SUCCESS)
        SLOG_E("nrf_fstorage_erase error,%d",ret);
    waitForFlashReady(&fstorage);

    if((ret = nrf_fstorage_write(&fstorage, 0x74000, write_buff, sizeof(int)*SIZE, NULL)) != NRF_SUCCESS)
        SLOG_E("nrf_fstorage_write error,%d",ret);
    waitForFlashReady(&fstorage);

    for(i = 0;i < 1024;i++){
        nrf_fstorage_read(&fstorage, 0x74000+i*4, &main_addr_buff, sizeof(int));
        DLOG_I("main_addr=0x%x,main_addr_buff=0x%x",0x74000+i*4,main_addr_buff);
    }

i write 40bytes to flash 0x74000 and read 0x74000。i find it actually use 160bytes. I try to write a different number of bytes, it actually use 4*(write bytes)

this is jflash image

Thank you for your reply!!

[tesc]

Hi,

I do not see anything immediately wrong with the code. A scaling factor of 4 indicates a length error with number of bytes / number of words, but according to the API documentation for fstorage the length fields are in bytes and you provide the lengths in bytes so that should be correct.

Is your code a modification of the fstorage example in nRF5 SDK v17.0.2?
Can you share the full project for me to look into and try to reproduce?

Regards,
Terje

[yangyongkai]

Hi,I tested it on my own board(52833), not pca10040, pca10056 and pca10100. softdevice is s140_nrf52_7.0.1_softdevice, sdk is nRF5SDK16(How do I get the full version number?)

[tesc]

Hi,

Since you mention the s140 SoftDevice, I assume that you use the version of the example found in the folder <SDK root folder>/examples/peripheral/flash_storage/pca10056/s140, which is originally for the nRF52840, and that you have done the necessary changes for porting this example to your custom board and for running the example on an nRF52833.

I will try to reproduce, with nRF5 SDK v16.0.0. We have not released other versions of the SDK with major release version 16, so it should be that one.

Regards,
Terje