Advertisement fails after writing an image(40kB) into the internal flash

[balaji]

Hi,

I need to store an image of size 40kB to internal flash memory. Actually i tried to store it from the address like 0x28400 and 0x2E984 (memory addresses after softdevice and bank 0 ). I am getting hard-fault error, in timer initialization itself ( fails in, is buffer word aligned). and sometimes i can write and display the images but advertisement is not happening (hard-fault in ble_stack_init) .

So how can i use the memory to store the images, without fail in advertisement.

Regards, Balaji.M

[balaji]

Thanks for the reply Morten, I cannot say that there is no accidental written of data in somewhere(how can i check?). But, as a result through readout i can only say that, the image data's are written in exact location as i programmed. If possible try to give solution using the snippets below.

i just modified the ble_ app_alert_notification application,

int main(void)
{    
    leds_init();
    timers_init();
   app_timer_start(m_timer_update_id, TIMER_UPDATE_INTERVAL, NULL);
    gpiote_init();
    buttons_init();
    app_button_enable();

// store and display an image before advertisement start

          store_image(Image_Sample_128x160, 40960);   // function to store image data in internal flash
	  nrf_gpio_cfg_output(RST);
	  nrf_gpio_cfg_output(RS);
	
	  spi_master_init(SPI0, SPI_MODE0,false);   
	  TFT_init();
	  TFT_Clear_Screen(WHITE);
          TFT_Putphoto();                                            // read and display the image stored in internal flash

    bond_manager_init();
    ble_stack_init();
    ble_error_log_init();
    gap_params_init();
    advertising_init();
    alert_notification_init();
    conn_params_init();
    sec_params_init();
    radio_notification_init();
    
    // Start execution.
    advertising_start();
		
    // Enter main loop.
    for (;;)
    {
        power_manage();
    }

}

int store_image(const unsigned char image[], uint32_t size)     
{  
    uint32_t *addr;  
    uint32_t i;
    uint32_t pg_size;
    uint32_t pg_num;
	 uint32_t  image_data; 
	    
    pg_size   = NRF_FICR->CODEPAGESIZE;
    pg_num  = NRF_FICR->CODESIZE - 65;    
   addr = (uint32_t *)(pg_size * pg_num);
	
	for (i=0; i<39; i++)
	{	
	flash_page_erase(addr+(i*pg_size));    
	}
	
	for (i = 0; i<size; i+=4)  
	{
	image_data = (image[i+3]<<24)|(image[i+2]<<16)|(image[i+1]<<8)|(image[i]);
		
           ////		image_data = (image[i]<<24)|(image[i+1]<<16)|(image[i+2]<<8)|(image[i+3]);
	  flash_word_write(addr++, image_data);  
  }
    
}

If the above information is not enough i can post a regular support case as you suggest.

Regards, Balaji

[Ole Morten]

I've expanded my answer above with what turned out to be the problem here, so I'd be happy if you could accept it as an answer, to clear up this question.