External Flash W25Q64 with USBD_MSC example on NRF52840

[sne_333]

Hi All,

        I have an external flash W25Q64 on which I have to mount a file system. I am using USBD_MSC example of NRF52840. My main goal is to create a file inside the flash memory chip. And when USB is plugged into the device it should be seen as a drive on laptop/desktop and I should be able to access the file which was created in the flash chip.I have made the connections on the NRF52840 using the pin configurations below:-

#define SDC_SCK_PIN     (25) 
#define SDC_MOSI_PIN   (23) 
#define SDC_MISO_PIN   (24) 
#define SDC_CS_PIN       (15) 

I have also configured the details in nrf_serial_flash_params.c file. 

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static const nrf_serial_flash_params_t m_sflash_params[] = {

{

.read_id = { 0xEF,0x40,0x17 },

.capabilities = 0x00,

.size = 8 * 1024 * 1024,

.erase_size = 2 * 1024,

.program_size = 256,

}

};

nrf_serial_flash_params_t const * nrf_serial_flash_params_get(const uint8_t * p_read_id)

{

size_t i;

for (i = 0; i < ARRAY_SIZE(m_sflash_params); ++i)

{

if (memcmp(m_sflash_params[i].read_id, p_read_id, sizeof(m_sflash_params[i].read_id)) == 0)

{

return &m_sflash_params[i];

}

}

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

static const nrf_serial_flash_params_t m_sflash_params[] = {
    {    
        .read_id = { 0xEF,0x40,0x17 },
        .capabilities = 0x00,
        .size = 8 * 1024 * 1024,
        .erase_size = 2 * 1024,
        .program_size = 256,
    }
};

nrf_serial_flash_params_t const * nrf_serial_flash_params_get(const uint8_t * p_read_id)
{
    size_t i;

    for (i = 0; i < ARRAY_SIZE(m_sflash_params); ++i)
    {
        if (memcmp(m_sflash_params[i].read_id, p_read_id, sizeof(m_sflash_params[i].read_id)) == 0)
        {
            return &m_sflash_params[i];
        }
    }

    return NULL;
}

When I run the example , i get the following error:-

<info> app: Initializing disk 0 (QSPI)...

 <error> app: Disk initialization failed.

1) Will this example run for W25Q64 IC??

2) This example also includes FATfs files. Will it automatically create a file system on the external SPI W25Q64 flash memory??

3) Why am I getting "Disk initialization failed." error?

4) Inside sdk_config.h do I also need to enable pin configurations for Qspi??

5) How to test this application? Currently I am using NRF52840 DK and then connecting external spi flash to it. But for USB detection how will it work?

I have attached few files here to check for the configurations

https://devzone.nordicsemi.com/cfs-file/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-07b22aa9f6fe492cbaf5dd082cf33f82/usb_5F00_msc.c

04162.sdk_config.h

5287.W25Q64BV.PDF

Please help me to solve this issue. I need to solve this issue on an urgent basis. Your help will be appreciated. I have also attached W25Q64 datasheet for your reference.

Thanks & Regards,

Snehal