nrf52832 flash erase

RE: nrf52832 flash erase

Vidar Berg — Fri, 11 May 2018 07:05:59 GMT

Ok, so you are sure that save_mac_buff and data_buff are two separate buffers? The memcpy routine copies data from "pdata" to "data_buff", which seems to be required to get the correct data stored. Where does save_mac_buff get updated with pdata?

RE: nrf52832 flash erase

amywei — Thu, 10 May 2018 03:32:35 GMT

Thanks,

data_buff is not the source pointer, the source pointer is save_mac_buff

Here is the fs_store operation

void fs_evt_handler(fs_evt_t const * const evt, fs_ret_t result)
{
	if ( FS_EVT_STORE == evt->id && FS_SUCCESS == result )
	{
		printf("flash store done\r\n");
	}
	else if ( FS_EVT_ERASE == evt->id && FS_SUCCESS == result )
	{
//		printf("flash erase done\r\n");
		fs_store(&fs_config, fs_config.p_start_addr, save_mac_buff, 2, NULL);
	}
}

RE: nrf52832 flash erase

Vidar Berg — Wed, 09 May 2018 06:00:17 GMT

Yes, you need to perform an erase before you can update flash content.

Is data_buff the source pointer you are passing to fs_store()? In that case you have to make sure that data_buff contains the data you want to store, which I assume is what the memcpy is doing here.

RE: nrf52832 flash erase

amywei — Wed, 09 May 2018 03:00:09 GMT

Thanks

Here is only erase flash. I think fs_erase(&fs_config, fs_config.p_start_addr, 1, NULL) is necessary.,but why function memcpy() is also necessary?

RE: nrf52832 flash erase

Vidar Berg — Tue, 08 May 2018 11:41:35 GMT

Hi,

Both source and destination pointer must be word aligned, have you checked if pdata pointer is word aligned? You can enforce word alignment by using the __ALIGN() keyword when defining the variable.

e.g.,__ALIGN(4) static uin8_t pdata[128] ;