How to make the USB capacity size equal to the flash size?

[WenLiYong]

      Now I'm developping a USB MSC project, the Nand flash size is 4GB,  I don't know how to set USB capaticy size.

     I change the setting in nrf_serial_flash_params.c:                  

   static const nrf_serial_flash_params_t m_sflash_params[] = {
    {   
        .read_id = { 0x00, 0x2C, 0x35 },    // 4G new ver
        .capabilities = 0x00,
        .size = 512 * 1024 * 1024,
        .erase_size = 4 * 1024,
        .program_size = 256,    
    }
};

     But I found the U: size is always 16MB. after plug into PC.

     Please advise how to change USB capaticy size?

Best Regards

Yong

[WenLiYong]

Hi, Nordic Team,

        Please advise the above issue. Thank you!

Best Regards

Yong

[Sigurd]

Hi,

WenLiYong said:

But I found the U: size is always 16MB. after plug into PC.

Please try to format the disk. Right click on your U: drive, and click "Format.."

[WenLiYong]

Hi,

    Yes, I have clicked "Format", but it still show 16MB,  I want to know whether it should change other setting except for m_sflash_params?

Best Regards

Yong

[Sigurd]

Hi,

I only needed to change m_sflash_params when I tested this with the usbd_msc example in SDK 16.0, and with a Windows 10 computer. When I changed to .size = 512 * 1024 * 1024, it showed up as 512 MB when I tried formatting the disk.

[WenLiYong]

Hi,

   I have made some test in SDK 16.0 again,  and find if the size is larger than 64MB, The f_mkfs() is always returned error message FR_MKFS_ABORTED.

   Please advise, Thank you.

Best Regards

Yong