Error in running sd card example

[ashish_shukla]

Hi all, 

I've a custom board in which I'm trying to interface SD card with nRF52840 chip. 

I've checked connections with multimeter for connectivity and  added pins accordingly in the code. 

I'm adding snippet of the connections. 

 

I get following error with example 

<info> app: FATFS example started.
<info> app: Initializing disk 0 (SDC)...
<info> app: Disk initialization failed.

Can someone plz help in figuring out reason for this error and how to resolve it ? 

[Simonr]

Okay, the pin configuration and voltage should be fine then

Is the SD card formatted (FAT32 or FAT)? What value does the disk_state have in main.c at the point when the "Disk initatilzation failed" message is printed? Try comparing this to the values in DRESULT in diskio.h to see if you can get any info from that? Also, what's the flash size on the SD card?

Best regards,

Simon

[ashish_shukla]

Yes, SD card is formatted with FAT32. 

Value of disk_state is 1 which indicates R/W error. Can we debug further ? 

And SD card has 8GB of flash memory.  

Thanks.