FDS erase

RE: FDS erase

natersoz — Mon, 07 Jan 2019 06:34:26 GMT

Thank you!

RE: FDS erase

Fabien Comte — Sat, 01 Dec 2018 22:08:53 GMT

This is the part of my code that can interest you (for bootloader).

RE: FDS erase

Fabien Comte — Sat, 01 Dec 2018 22:07:41 GMT

void fds_erase()
{
	flash_bounds_set();
	
	NRF_LOG_INFO("FDS area is 0x%08X - 0x%08X", m_fs.start_addr, m_fs.end_addr - 1);
	

	ret_code_t rc = nrf_fstorage_init(&m_fs, &nrf_fstorage_nvmc, NULL); // only working for bootloader

	if (rc == NRF_SUCCESS)
	{
		NRF_LOG_INFO("nrf_fstorage_init OK");
	}
	else
	{
		NRF_LOG_ERROR("nrf_fstorage_init error (%d)", rc);
		return;
	}
	
	for (int a = m_fs.start_addr; a < m_fs.end_addr; a++)
    {
		unsigned char * fds_area = (unsigned char *) a;
        if (fds_area[0] != 0xFF)
        {
            NRF_LOG_INFO("FDS not clear at 0x%08X", a);
			break;
        }
    }
	
	for (int p = 0; p < FDS_VIRTUAL_PAGES; p++)
	{
		NRF_LOG_INFO("FDS erasing page %d", (int) p);

		#if   defined(NRF51)
			int erase_unit = 1024;
		#elif defined(NRF52_SERIES)
			int erase_unit = 4096;
		#endif

		int page_addr = m_fs.start_addr + p * erase_unit; // erase unit == virtual page size

		nrf_nvmc_page_erase(page_addr);

		low_power_delay_ms(200);
	}
	
	for (int a = m_fs.start_addr; a < m_fs.end_addr; a++)
    {
		unsigned char * fds_area = (unsigned char *) a;
        if (fds_area[0] != 0xFF)
        {
            NRF_LOG_ERROR("FDS erase failed at 0x%08X", a);
			break;
        }
    }
		
	NRF_LOG_INFO("FDS erase finished");
}

RE: FDS erase

natersoz — Sat, 01 Dec 2018 20:12:05 GMT

This sounds interesting. Is this code publicly accessible on github?

RE: FDS erase

Fabien Comte — Fri, 30 Nov 2018 20:12:08 GMT

Error printed fatal error on RTT output (in event management)

I finally found a way to create my "FDS" format that works nice. Thank you for your help.

RE: FDS erase

Jared — Fri, 30 Nov 2018 15:06:17 GMT

You can use nrfjprog for erasing the data in flash if it's not a part of your application. However, if it's part of your application then you can use nrf_fstorage_erase(). Flash can contain a lot of stuff, boot-loader, softdevice, application etc. Erasing flash would therefore require you to have an overview of its contents. If not, you can risk deleting the application itself. SES gives an overview of the content of flash after compilation. I would recommend that you use the FDS module so that you avoid the scenario of having to erase the entire flash. The FDS module gives you a reference to data in flash with its files, and records. You write that you get a fatal error when you use nrf_fstorage_erase(), could be more specific? What kind of error code is thrown? What are the parameters you use in nrf_fstorage_erase()?

Jared

RE: FDS erase

Fabien Comte — Thu, 29 Nov 2018 13:32:06 GMT

if i use nrf_fstorage_erase, i get a fatal error. What can i do next please ?

RE: FDS erase

Fabien Comte — Wed, 28 Nov 2018 11:54:36 GMT

I found for address in fds.c, see function flash_bounds_set();

There is a bug in fds.c / address_is_valid:

"p_addr <= (uint32_t*)m_fs.end_addr" should be "p_addr < (uint32_t*)m_fs.end_addr" because end_addr is excluded.

What can i use to erase pages ?

RE: FDS erase

Fabien Comte — Wed, 28 Nov 2018 08:56:46 GMT

Is that possible to erase a FDS area with a DFU update (a hex file full of FF with addresses that correspond to FDS) ?