sd card example not working fine

[YASH]

Hi All,

I am working on fatfs example from sdk 12.2.0 on pca10040, nrf52 dk, nrf52832. And i did not change anything in the code but it seems that my sd card is not getting initialized as i am getting following message on putty:-

APP:INFO: FATFS example.

APP:INFO:Initializing disk 0 (SDC)...

APP:INFO:Disk initialization failed.

and on debug, my code goes into this if condition in diskio_blkdev.c file:- Line no.-81

if (m_drives[drv].config.wait_func == NULL)
{
    m_drives[drv].config.wait_func = default_wait_func;
}

can anyone help me understand the reason behind why this is happening and how i should deal with it?

Thank in advance.

Regards

[Peter_E]

I seems that the problem is not hardware related. I tried the fatfs example with SDK 12.3 and Keil, this configuration works, whereas SDK 14.1 with Segger Embedded Studio fails.

[Jakub Rzeszutko]

Did you try to change MISO pull-up?

It is SDK config please set parameter: NRF_SPI_DRV_MISO_PULLUP_CFG to NRF_GPIO_PIN_NOPULL.