How to setup SD-card reader with nrf9160 for reading and writing files?

Question

Hi 
 
 I want to make use of this SD-card reader together with the nRF9160dk. 
 From what I understand: 
 1. I need to create a nrf160dk_nrf9160ns.overlay file to chose which pins to use for the SPI and GPIO for chip select on the SD-card reader. 
 2. Somehow make use of the fat_fs or littlefs sample from \zephyr\samples\subsys\fs\fat_fs. 
 
 Is there any plug&play samples like the MQTT and GPS from nrf that I can just build and flash? And some schematic or wiring diagram like this ? 
 
 If not, how would i proceed with setting up the SD-card reader module together with the nRF9160dk? 
 
 Kind Regards 
 Yuyanton

Simon · Accepted Answer

I don't have an SD card reader at hand right now, so I can't test it myself. But could you try to the sample provided by Torbjørn here ? 
 Here is also a helpful ticket that's worth checking out: https://devzone.nordicsemi.com/f/nordic-q-a/58558/reading-sd-card-on-nrf9160dk 
 If you're still having issues, I'll try to get ahold of an SD card reader like you have and see if I'm able to make it work. 
 Best regards, 
 Simon

Yuyanton · Answer

Hi Simon I looked through the code in Torbjørns .zip and noticed 1 difference in the overlay file which resolved the issue in my code. All i did was change one line in my overlay. From this: cs-gpios = <&gpio0 13 0>; To this: cs-gpios = <&gpio0 13 GPIO_ACTIVE_LOW>; Thanks for pointing me in the right direction

nrf9160dk	MicroSD-reader
5v	5v
GND	GND
P0.10	CLK
P0.11	DO
P0.12	DI
P0.13	CS

nrf9160dk	MicroSD-reader
5v	5v
GND	GND
P0.10	CLK
P0.11	DO
P0.12	DI
P0.13	CS

How to setup SD-card reader with nrf9160 for reading and writing files?

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