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Hello !!!
I tried to interface with a memory card but could not get it.
I am using SanDisk ultra sd card with the adapter because you can't directly connect on it.
My pin connections should be,

Pin1 (CS ) ----> P1L
Pin2 (MOSI[DI]) ---> P1K
Pin3 (GND) ---> GND
Pin4 (3V) ---> 3V3
Pin5 (CLK) ---> P1I
Pin6 (GND) ---> GND
Pin7 (MISO[DO]) ---> P1J
Pin8 (NC) --->NC
Pin9 (NC) --->NC

I tried to place 10k pull up on pin2[MOSI] and pin7[MISO]. Still do not get any response.

I tested the same thing Arduino sd card module it works well.

In SDCardHostSPI.xc,

static SDHostInterface SDif[] = // LIST HERE THE PORTS USED FOR THE INTERFACES
// cs, sclk, Mosi, miso
{{XS1_CLKBLK_1, XS1_CLKBLK_2, XS1_PORT_1L, XS1_PORT_1I, XS1_PORT_1K, XS1_PORT_1J, 0, 0}}; // resources used for interface #0

changed as per defined output.

I hope anyone helps me get out this problem.

module FatFs is baed on FatFs R0.09. Later versions are now available. It would be good to move up to the latest version,

Both module_sdcard4bit and module_sdcardSPI hard coded enables the internal pull-up resistors on some ports. This will work fine on XS1-G devices that have pull-up resistors, but it will cause an exception on XS1-L devices because they do not have internal pull-up resistors (instead they have pull-down resistors).

Assumptions about the target device cannot be made implicitly. I propose to either fully rely on external pull-up resistors regarding the software or to pass a parameter to an initialization routine that will either do nothing or enable the internal pull-up depending on the value of the parameter.

I get a memory exception in f_read() when _FS_TINY is set to 1. Seems to work fine with _FS_TINY set to 0

The test program currently doesn't check this. I've put an improved version on https://github.com/tuck1s/sc_sdcard