FatFS example with SD card: disk initialization fails

[trashman]

Hello!

I try to run FatFS example (SD card example, pca10040) from nRF5 SDK on my nrf52832 (ebyte e73) with microSD card with no success. No matter what I'm still getting the same error: disk initialization failed (disk_initialize(0) returns 1). I've already read many topics and tried several things like: 

• changing APP_SDCARD_FREQ_INIT and APP_SDCARD_FREQ_DATA to other values (lower / higher, depending on answers found)
• changing NRFX_SPIM_MISO_PULL_CFG or NRF_SPI_DRV_MISO_PULLUP_CFG to other values
• double-checked connections (pins in code & wiring)
• tried different microSD cards
• tried cards formatted as FAT32, as FAT...
• tried connecting the same card adapter to Arduino on 3.3V and running simple SD card exmaple and IT WORKED

VCC in my setup is 3.3V (not from a battery).

I also tried code like this:

nrf_gpio_cfg(SDC_SCK_PIN,
    NRF_GPIO_PIN_DIR_OUTPUT,
    NRF_GPIO_PIN_INPUT_DISCONNECT,
    NRF_GPIO_PIN_NOPULL,
    NRF_GPIO_PIN_H0H1,
    NRF_GPIO_PIN_NOSENSE);

but later, while debugging, found out that it is set in nrfx_spim.c after calling disk_initialize, so this code in my main.c did not change anything.

I have no idea how to go futher, so I'm asking for help.

[awneil]

trashman said:

(disk_initialize(0) returns 1).

have you stepped into disk_initialise() to see where, exactly, it is failing; ie, what is causing it to return 1 ?

have you used a scope or analyser to see what's happening on the wires?

[trashman]

Yes, I tried following step by step what is happening and:

• in diskio_blkdev.c: nrf_blk_dev_init returns with code 17 (0x11) in disk_initialize function
• in nrf_block_dev_sdc.c: in block_dev_sdc_init function the following error event is called: {ev_type=0xb5, result=0x34, p_blk_req=0, p_work->p_context}

If you can give me any hint I can debug further to see more, but don't know what to look for.

No, I haven't used scope or analyser and do not have any.

[awneil]

trashman said:

in diskio_blkdev.c: nrf_blk_dev_init returns with code 17 (0x11)

So have you looked-up what that code means?

And have you stepped into that code to see where, exactly, it is failing; ie, what is causing it to return that code ?

FatFs documentation:

elm-chan.org/.../00index_e.html

trashman said:

I haven't used scope or analyser and do not have any.

Getting this to work requires that the hardware is correct - how did you plan to test/debug the hardware?

How have you verified that your connections are correct & working?

Lots of info about SD-Cards & their hardware at the bottom of the http://elm-chan.org/fsw/ff/00index_e.html page,  under 'Resources' - in particular, see 'How to Use MMC/SDC'