NAND flash programming model

Altera_Forum · ‎02-09-2015

Hi

I use Cyclone V HPS on our custom board and try to work with NAND flash controller. The application is baremetal and hwlib is used. For now I can read device and manufacturer ID and do initialization. I can't perform read/write operation: I've done erasing-writing-reading but I've got zeroes. Here is my code:


    uint32_t address = 0x10050000;
    char testdatain  = {1, 2, 3, 4};
    char testdataout  = { 0 };
    if (status == ALT_E_SUCCESS)
    {
        printf("INFO: NAND initialization\n");
        status = alt_nand_flash_init(false, false, NULL, NULL);
    }
    if (status == ALT_E_SUCCESS)
    {
        status = alt_nand_flash_block_erase(address, NULL, NULL);
    }
    if (status == ALT_E_SUCCESS)
    {
        status = alt_nand_flash_page_write(address, 1, testdatain, sizeof(testdatain));
    }
    if (status == ALT_E_SUCCESS)
    {
        status = alt_nand_flash_page_read(address, 1, testdataout, sizeof(testdataout));
        if (status == ALT_E_SUCCESS)
        {
            for (int i=0; i<sizeof(testdataout); i++)
            {
                printf("byte# %d = %d\n", i, testdataout);
            }
        }
    }

My point is it's someting wrong with addressing, because if I set address to 0x0, it is ok.

Has anybody some working examples for NAND? Or some useful link? I can't find Altera examples on this topic. The only reference is function descriptions in alt_nand_flash.h file.

Thanks in advance.

Altera_Forum · ‎08-26-2015

serjjo, Did you figure out how to read & write the NAND flash? I need to do this as well.

Thanks

Ron

Altera_Forum · ‎09-21-2015

well... I have successfully programmed and am able to read the values from nand flash. But after programming when i check the status whether it is successfully programmed or not, the status register shows there is some error in programming. This happens only when I enable ECC. If I disable the ECC it works cool!

Altera_Forum · ‎09-21-2015

Naveen D S,

Thanks for responding. If you would be willing to share you code and any configuration tips, I would sure like to see it. Is this a bare-metal design? That is what I'm doing.

Ron

Altera_Forum · ‎09-22-2015

I am using the micron Nand flash code which I downloaded from net. I have written a top level code for the nand controller. I have created a custom component using sopc builder (soft core processor nios 2). You can easily get the code from Micron technologies website. (I'm not sure what exactly "bare-metal design" is)

Altera_Forum · ‎09-22-2015

"Bare-metal" code does not use an operating system. It is compiled directly for the target microcontroller. If you are writing for the Nios II soft processor, I don't think this would be called bare-metal, but I'm not certain. If you are using Linux, this is not bare-metal.

Altera_Forum · ‎09-23-2015

Thank you Ron.

Nope. I'm not using linux. I am still stuck there. Status register still doesn't show me whether programming is successful or not. May be programming is successful... may be not.

Else, I might not be reading the status register at the right time..