Flash can't not erase and write when a table in code

RE: Flash can't not erase and write when a table in code

gandyhuang — Wed, 13 Nov 2019 06:51:23 GMT

HI,

I had used NRF_LOG_INFO to print out the data, and the result was right. I think it's caused by the SEGGER Embedded Studio. Thanks you very much!

    nrf_nvmc_write_word((uint32_t) &testtable,0);             //wirte Ok
    memcpy(&a,(const uint8_t *) 0xfd000,4);
    NRF_LOG_INFO("\r\n 1:%d",a);
    UNUSED_RETURN_VALUE(NRF_LOG_PROCESS());

    nrf_nvmc_page_erase((uint32_t) &testtable);               //erase OK
    
    memcpy(&b,(const uint8_t *) 0xfd000,4);
    NRF_LOG_INFO("\r\n 2:%d",b);
    UNUSED_RETURN_VALUE(NRF_LOG_PROCESS());

RE: Flash can't not erase and write when a table in code

Simonr — Mon, 11 Nov 2019 14:24:27 GMT

I can't see anything wrong right off the bat with your main file. Have you made any other changes than adding the .testtable and the write/erase commands to the main.c file? Please double check that you've configured the flash_placement.xml file correctly as well. This is very well described by a SEGGER employee in this case.

Best regards,

Simon

RE: Flash can't not erase and write when a table in code

gandyhuang — Mon, 11 Nov 2019 09:54:38 GMT

Hi,

I'm sorry, the description is not clear：I mean is there any other registers like ACL-Access Control Lists,Because I had checked NRF_ACL registers is set to 0x00, not block flash read or write; but flash page in 0xfd000 is still can not be write and erased when

load="yes"(see the flash_placement.xml)

Can you help to check my code in attachments is correct？

RE: Flash can't not erase and write when a table in code

Simonr — Mon, 11 Nov 2019 09:14:54 GMT

Sorry about the delayed reply, but I was out of the office last Friday.

[quote user="gandyhuang"]I had checked the ACL register ,but all of ALL register is 0, Is there any other register do protect the code size ?[/quote]

I'm sorry, but can you try to specify what it is you want to achieve with your project, as I'm having some trouble understanding what exactly you want to do. I need some more information regarding the goal of your project in order to help you.

Best regards,

Simon

RE: Flash can't not erase and write when a table in code

gandyhuang — Thu, 07 Nov 2019 14:13:08 GMT

HI Simonr,

I tested it in nrf52840 , your can find the code and some picture in attached file;

I have one project, there are some config data tables, and the data can be modified by app, but when i try to modify the data, i found that the the data had no any change, so i try test in flashwrite sample , but it still the same result. I had checked the ACL register ,but all of ALL register is 0, Is there any other register do protect the code size ?

devzone.nordicsemi.com/.../flashwrite.zip

RE: Flash can't not erase and write when a table in code

Simonr — Thu, 07 Nov 2019 12:51:21 GMT

There are a few details I need from you.

What device are you seeing this issue on? nRF52832 or nRF52840?
How do you see that the write and erase fail? Is there any error code that might help us see what's causing this?
Can you try to explain what exactly you want to achieve with this?

It seems to me like using the fstorage example instead might be easier, as that is a more "user-friendly" example.

Best regards,

Simon