FDS write fail

RE: FDS write fail

Louis — Wed, 09 Aug 2017 02:48:00 GMT

Based on your code, check addr. of saveData & saveData2 in map file. Suppose addr of saveData should be 4-byte alignment, but saveData2 not. Moreover, write_flag should be reset be4 write operation.

RE: FDS write fail

kian79 — Wed, 09 Aug 2017 01:13:50 GMT

Hi Louis,

What do you mean the start address is word align? Can you give an example? Thanks.

RE: FDS write fail

Louis — Wed, 09 Aug 2017 01:11:43 GMT

Guess you got this error: FDS_ERR_UNALIGNED_ADDR. If the case, make sure the start addr. is word alignment.

RE: FDS write fail

kian79 — Wed, 09 Aug 2017 00:51:42 GMT

Hi all,

I managed to get it to work partially. Its a strange problem. Somehow, the write will fail if the data I am saving into Flash is not taking up a multiple of uint32_t memory and it needs to be at least 3 x uint32_t memory.

So I had to do this:

struct
{
    uint8_t     	var1[7];
    uint8_t		dummy1;
    uint16_t		var2;
    uint16_t		dummy2;
} saveData2;

So this works. But WHY?

I also have another weird problem. I am using both fds write and fds update to two different recordKey.

Assuming I already have one record in recordKey 0x2001 and one record in recordKey 0x2000. And I call the following codes:

// fds_update function
static ret_code_t fds_update(void)
{
    ret_code_t ret = fds_record_update(&record_desc, &record);
    if (ret != FDS_SUCCESS)
    {
        return ret;
    }
    while (update_flag==0);
    NRF_LOG_INFO("Updating Record ID = %d \r\n",record_desc.record_id);
    return NRF_SUCCESS;
} 

// inside main
fileID = 0x1000;
recordKey = 0x2001;
fds_write();

fileID = 0x1000;
recordKey = 0x2000;
fds_update();

When I do a record search, I end up with two records in recordKey 0x2000 and 1 recordKey in 0x2001. But this is wrong. I should have 2 records in recordKey2001 and have a new updated 1 record in recordKey 0x2000.

*Update I solved the problem. I need to call fds_find_record first before calling fds_update. This worked for me

RE: FDS write fail

Hung Bui — Mon, 07 Aug 2017 14:03:26 GMT

Would it the same issue as in the question here ? I have an example of doing 2 writes in the case, it worked fine.

RE: FDS write fail

emdi — Mon, 07 Aug 2017 07:25:26 GMT

Hi,

what error do you get?