fstorage in chosen area

[cedric]

Hello, I'd like to store a large amount of data in flash and in a chosen area. As a start, I've chosen the area starting from 0x77000 and ending at 0x78000 Iv'e written this

const tGlobalData romData  __attribute__((at(0x77000))) __attribute__((used));
static void fs_evt_handler(fs_evt_t const * const evt, fs_ret_t result);
FS_REGISTER_CFG(fs_config_t my_fs_config) =
    {
        .callback  = fs_evt_handler,    // Function for event callbacks.
        .num_pages = 4,                 // Number of physical flash pages required.
        .priority  = 0xFE,               // Priority for flash usage.
        .p_start_addr = (uint32_t*)0x77000,
        .p_end_addr = (uint32_t*)0x78000
    };
    
static void fs_evt_handler(fs_evt_t const * const evt, fs_ret_t result)
{
    switch(evt->id)
    {
        case FS_EVT_STORE:
            if(result == FS_SUCCESS){
            }
            break;

        case FS_EVT_ERASE:
            // Handle erase event
            break;

        default:
            //Do nothing
            break;
    }
}

void initROM()
{
  //fs_ret_t ret = fs_init();
}

void saveROM()
{
  volatile fs_ret_t fs_ret;
  fs_ret= fs_erase(&my_fs_config,(uint32_t*)&romData,4,NULL);
  fs_ret= fs_store(&my_fs_config,(uint32_t*)&romData,(uint32_t*)&globalData,(sizeof(tGlobalData)+1)/4,NULL);
}

void readROM()
{
  memcpy(&globalData,&romData,sizeof(tGlobalData));
}

the erase operation fails. After debug, the start address at config is 0x7D000, so that &romData is out of range. The arear is welle allocated by the linker, so I should miss something.

[Hung Bui]

Hi Cedric,

Why did you comment out fs_init() ?

I tested with this example here and able to set the start address, no problem.

[Hung Bui]

Yes, I mentioned, I modified the code and can set the start address. It worked. Code I used:

	FS_REGISTER_CFG(fs_config_t fs_config) =
	{
		  .callback  = fs_evt_handler, // Function for event callbacks.
			.num_pages = NUM_PAGES,      // Number of physical flash pages required.
			.priority  = 0xFE,            // Priority for flash usage.
        .p_start_addr = (uint32_t*)0x57000,
        .p_end_addr = (uint32_t*)0x58000
	};