Hi everybody,
I am currently trying to write in flash several records key in a same file using fds_write, fds_update, fds_records_find.
My page is FILE_ID = 0x1000 and my 3 record keys are: ITEM_INTRO = 0x01, ITEM_DATA = 0x02 and ITEM_TOKEN = 0x03.
These 3 record keys are associated to 3 tab respectively: learning_tab_intro, learning_tab_data and learning_tab token.
Whatever the records key called, it seems that the data is written or read at the same place in flash, that way when I shut down and next turn on my system, when I read the ITEM_INTRO records key I can find the data of record key ITEM_DATA and ITEM_TOKEN in.
Here is the learning_tab_intro that I wrote :
Here is the learning_tab_data that I wrote :
Here i the learning_tab_token that I wrote :
Here is the learning_tab_intro that I read after shutting the system down:
We see clearly that the ITEM_TOKEN record has been written in the ITEM_INTRO record
Inspired by the solution of this link https://devzone.nordicsemi.com/f/nordic-q-a/32208/what-should-i-start-in-order-to-use-the-maximum-memory-space-in-fstorage I created these two functions :
Here is my write function :
ret_code_t fds_function_write(uint8_t item , uint8_t size,uint16_t tab[])
{
static uint32_t write_tab[LEARNING_TAB_SIZE/2] ={0};//max size
memcpy(write_tab, tab, size*2);//in number of byte, 1 uint16 = 2 bytes
fds_record_t record;
fds_record_desc_t record_desc;
// Set up record.
record.file_id = FILE_ID;
record.key = item;
record.data.p_data = &write_tab;
record.data.length_words = (size+1)/2;//from uint16 to uint32, 1 uint16 = 0.5 uint32
fds_find_token_t ftok ={0};//Important, make sure you zero init the ftok token
if(fds_record_find(FILE_ID, item, &record_desc, &ftok) == FDS_SUCCESS)
{
ret_code_t ret = fds_record_update(&record_desc, &record);
if (ret != FDS_SUCCESS)
{
return ret;
}
NRF_LOG_INFO("Updating Record ID = %d \r\n",record_desc.record_id);
ret = fds_gc();
if (ret != FDS_SUCCESS)
{
return ret;
}
NRF_LOG_INFO("FDS_GC = ok \r\n");
}
else
{
ret_code_t ret = fds_record_write(&record_desc, &record);
if (ret != FDS_SUCCESS)
{
return ret;
}
NRF_LOG_INFO("Writing Record ID = %d \r\n",record_desc.record_id);
}
return NRF_SUCCESS;
}
And here my read function :
ret_code_t fds_function_read(uint8_t item , uint8_t size, uint16_t tab[])
{
static uint16_t read_tab[LEARNING_TAB_SIZE] = {0};//max size
fds_flash_record_t flash_record;
fds_record_desc_t record_desc;
fds_find_token_t ftok ={0};//Important, make sure you zero init the ftok token
uint16_t *data;
uint32_t err_code;
err_code = fds_record_find(FILE_ID, item, &record_desc, &ftok);
if ( err_code == FDS_SUCCESS)
{
err_code = fds_record_open(&record_desc, &flash_record);
if ( err_code != FDS_SUCCESS)
{
return err_code;
}
//NRF_LOG_INFO("Found Record ID = %d\r\n",record_desc.record_id);
data = (uint16_t *) flash_record.p_data;
for (uint8_t i=0;i<((flash_record.p_header->length_words)*2);i++)//1 word = 1 uint32 = 2 uint16
{
read_tab[i] = data[i];
}
memcpy(tab, read_tab, (size));
// Close the record when done.
err_code = fds_record_close(&record_desc);
if (err_code != FDS_SUCCESS)
{
return err_code;
}
}
else
{
return err_code;
}
return NRF_SUCCESS;
}
Do you see any mistake or have you got an idea of how could I resolve my issue ?
I thanks you all in advance !
