Reading File content of RAM in MSC example

[maxxware]

Hi,

I am using NRF52. i have custom board on that external flash and SD card is not available. i want to use msc class so that i can drag and drop file and read it in controller. i tried to use msc example by making following changes..

static diskio_blkdev_t drives[] =
{
DISKIO_BLOCKDEV_CONFIG(NRF_BLOCKDEV_BASE_ADDR(m_block_dev_ram, block_dev), NULL)
};

but when i called disk_state = disk_initialize(0); this return fail state

is there any way to achieve my target . Any Lead on this will very helpful for me.

Thanks for Help...:)

[Øyvind]

Hello!

i have custom board on that external flash and SD card is not available.

I do not understand what you mean, do you have both an external flash and an SD card? 

but when i called disk_state = disk_initialize(0); this return fail state

 Did you test with our USB MSC example on your custom board?

Kind regards,
Øyvind

[maxxware]

Thanks for your response. I had tested usb msc but issue it that in my custom board external flash and sd card is not available 

[Øyvind]

Hello, 

I've been discussing the issue with a colleague. Can you edit the following in sdk.config:

// <e> NRF_BLOCK_DEV_RAM_CONFIG_LOG_ENABLED - Enables logging in the module.
//==========================================================
#ifndef NRF_BLOCK_DEV_RAM_CONFIG_LOG_ENABLED
#define NRF_BLOCK_DEV_RAM_CONFIG_LOG_ENABLED 1
#endif
// <o> NRF_BLOCK_DEV_RAM_CONFIG_LOG_LEVEL  - Default Severity level
 
// <0=> Off 
// <1=> Error 
// <2=> Warning 
// <3=> Info 
// <4=> Debug 

#ifndef NRF_BLOCK_DEV_RAM_CONFIG_LOG_LEVEL
#define NRF_BLOCK_DEV_RAM_CONFIG_LOG_LEVEL 4
#endif

This should give us more information in the terminal. 

Our concern is that the fatfs is not properly initialized, and that is causing the issue. Are you basing your code on the USB MSC example? Be aware that FatFS will create a FAT volume on the logical drive when button 3 is pressed. Do you have these pins in use? There may be conflicts with GPIO on your custom board and the example itself.

Kind regards,
Øyvind