Writing data in flash

RE: Writing data in flash

Simon — Thu, 20 May 2021 13:20:56 GMT

A customer faced a similar issue recently: https://devzone.nordicsemi.com/support-private/support/269399#permalink=659970 Could you test the solution proposed there?

Best regards,

Simon

RE: Writing data in flash

Crescenzo Dassi — Thu, 20 May 2021 09:01:46 GMT

Hi Simon,

Your code works. However it starts breaking if you add some Bluetooth features.

For instance, if in your project, in prj.conf you add the following configurations to enable the bonding

# Enable bonding
CONFIG_BT_SETTINGS=y
CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_FLASH_MAP=y
CONFIG_NVS=y
CONFIG_SETTINGS=y

and in the main you add:

        bt_enable(NULL);

     
	if (IS_ENABLED(CONFIG_SETTINGS)) {
		settings_load();
	}

The SoC goes in hard fault when attempts to write the flash in the thread.

I noticed that everything works fine if you remove CONFIG_NVS=y from prj.conf.

However, even without CONFIG_NVS, if in the main you add a command to start the advertising, like below

        bt_le_adv_start(BT_LE_ADV_CONN, ad, ARRAY_SIZE(ad), sd,
			     ARRAY_SIZE(sd));

The SoC goes in hard fault again when trying to write in flash...

I don't understand the correlation between Bluetooth Stack and Memory Controller, but something happens when you try to handle both in the same code.

I attach the prj.cnf file I am working with.

.devzone.nordicsemi.com/.../myprj.conf

Thank you.

Best Regards,

Crescenzo

RE: Writing data in flash

Simon — Tue, 18 May 2021 15:23:26 GMT

I was not able to reproduce the hard fault. I ran your snippet from a thread and did not get any hard faults. I wrote

0x0000009AUL to address 0x0005A000 and confirmed that it was sucessfully exectuted:

C:\Users\Simon>nrfjprog --memrd 0x00059FF0 --n 0x30
0x00059FF0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x0005A000: 0000009A FFFFFFFF FFFFFFFF FFFFFFFF   |................|
0x0005A010: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF   |................|

Could you test the same code and see if you get it to work:

devzone.nordicsemi.com/.../threads_5F00_raw_5F00_flash.7z

Best regards,

Simon