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Gyud0's avatar
Gyud0
Icon for Occasional Contributor rankOccasional Contributor
4 years ago

Generic serial Flash interface sector erase problem

Hey,

I'm using the Reference design Generic Serial Flash Interface IP on Quartus Prime 18.1 to access Micron MT25QL512Mb flash memory.

Via NIOS processor, I able to erase the memory sector 0 (at address 0x00000000) data correctly in the 4-Byte address mode by the function:

void erase_sector_micron()

{

IOWR(INTEL_GENERIC_SERIAL_FLASH_INTERFACE_TOP_0_AVL_CSR_BASE,0x7,0x000004DC);

IOWR(INTEL_GENERIC_SERIAL_FLASH_INTERFACE_TOP_0_AVL_CSR_BASE,0x9,0x00000000);

IOWR(INTEL_GENERIC_SERIAL_FLASH_INTERFACE_TOP_0_AVL_CSR_BASE,0x8,0x1);

}

But when I try to erase another sector, like sector 1, I don't see the erasing actually happens:

void erase_sector_micron()

{

IOWR(INTEL_GENERIC_SERIAL_FLASH_INTERFACE_TOP_0_AVL_CSR_BASE,0x7,0x000004DC);

IOWR(INTEL_GENERIC_SERIAL_FLASH_INTERFACE_TOP_0_AVL_CSR_BASE,0x9,0x00010000);

IOWR(INTEL_GENERIC_SERIAL_FLASH_INTERFACE_TOP_0_AVL_CSR_BASE,0x8,0x1);

}

The sector 1 address is 0x10000 according to page 19 in the Datasheet:

https://media-www.micron.com/-/media/client/global/documents/products/data-sheet/nor-flash/serial-nor/mt25q/die-rev-b/mt25q_qlkt_l_512_abb_0.pdf?rev=0ef0faa5f7b645d7bc11c30bfd27505b

I would like to get some help here,

Thanks

8 Replies

  • hareesh's avatar
    hareesh
    Icon for Frequent Contributor rankFrequent Contributor
    4 years ago

    hi Gyud0

    I am working on it. please give me some time.

    thanks.

  • hareesh's avatar
    hareesh
    Icon for Frequent Contributor rankFrequent Contributor
    4 years ago

    hi GAL YUD,

    please check WRITE ENABLE command is executing or not before initiating ERASE command. in you shared code lines WRITE ENABLE command is not there.

    thanks,

    • Gyud0's avatar
      Gyud0
      Icon for Occasional Contributor rankOccasional Contributor
      4 years ago

      Hi,

      I'm executing the write enable command before I initiating the erase command. It's the same order that I do successfully in erase sector 0, the only change is the desired address to be deleted

    • hareesh's avatar
      hareesh
      Icon for Frequent Contributor rankFrequent Contributor
      4 years ago

      check lock protection enable or disabled. before erase sectors needs to disable lock protection. pls check that.

  • Gyud0's avatar
    Gyud0
    Icon for Occasional Contributor rankOccasional Contributor
    4 years ago

    My code in C:

    int main()

    {

    IOWR(INTEL_GENERIC_SERIAL_FLASH_INTERFACE_TOP_0_AVL_CSR_BASE,0x7,0x00000006); --Write enable

    IOWR(INTEL_GENERIC_SERIAL_FLASH_INTERFACE_TOP_0_AVL_CSR_BASE,0x8,0x00000001); --Write enable

    IOWR(INTEL_GENERIC_SERIAL_FLASH_INTERFACE_TOP_0_AVL_CSR_BASE,0xA,1); --Write enable

    IOWR(INTEL_GENERIC_SERIAL_FLASH_INTERFACE_TOP_0_AVL_CSR_BASE,0x7,0x000004DC); --Erase sector

    IOWR(INTEL_GENERIC_SERIAL_FLASH_INTERFACE_TOP_0_AVL_CSR_BASE,0x9,0x00010000); --Erase sector

    IOWR(INTEL_GENERIC_SERIAL_FLASH_INTERFACE_TOP_0_AVL_CSR_BASE,0x8,0x00000001); --Erase sector

    }

    • hareesh's avatar
      hareesh
      Icon for Frequent Contributor rankFrequent Contributor
      4 years ago

      Hi @Gyud0 ,

      It's not a GSFI (Generic Serial Flash Interface) IP driver issue. The GSFI drivers are working fine. Please check Micron MT25QL512Mb flash memory access code because before erasing the sector, you have to disable device lock protection, write command passing, and some other commands also have to execute. In the Micron MT25QL512Mb datasheet, all the details are available. I am giving some reference example code links for the Micron MT25QL512Mb.

      link:

      https://github.com/STMicroelectronics/stm32-mt25ql512abb

      thanks,