PCA 10056 NRF52840-DK SD Card Problem

[rohit]

I'm using the PCA10056 with an SD card connected via P1.12-P1.15. When I use the FatFs example of SDK12 PCA10028 it works fine. but when I use the FatFs example of SDK15.0.0-PCA10056, it is not working.

Did any changes in SW/HW? I am Using NRF52840-DK and Model is PCA10056 1.0.0 2018.25  683802088.

[Jørgen Holmefjord]

Hi,

Did you connect the SD card directly to the pins, or through some SD card socket board? If this was connected through a board, please make sure the board does not have level converters for use with 5 V arduino boards.

Are you using the FatFS example from the SDK, or did you modify it somehow?

Best regards,
Jørgen

[Jørgen Holmefjord]

Are you powering the PCA10056 board using 5V source? If not, it will not work with Fatfs socket board with level converters. If the board runs at 3V, the pin voltage for the SPI interface is outside the specified max Input high voltage for the nRF52840 GPIOs. Please try with a board without level converters.

[rohit]

Yes, I am powering through USB 5V.


I used this code: \nRF5_SDK_15.1.0_a8c0c4d\examples\peripheral\fatfs\pca10056\blank\arm5_no_packs

I am getting "Disk initialization failed."

NRF_LOG_INFO("Initializing disk 0 (SDC)...");
for (uint32_t retries = 3; retries && disk_state; --retries)
{
disk_state = disk_initialize(0);
stat = disk_state;
}
if (disk_state)
{
NRF_LOG_INFO("Disk initialization failed.");
return;
}

Using NRF52840- DK Board


Pls, send me code snippet for SDCard fatfs example tested on nRF52840?