How to use micro sd card? - sd_init function failed

[EunseongBoo]

Hello, I'm trying to read some files from micro sd card on Sipeed MAix Go Suit for RISC-V AI+IoT board.
However, the below errors occurred in sd_init function when I build and execute the sd_card demo in the repo.

--- forcing DTR inactive
--- forcing RTS inactive
--- Miniterm on /dev/ttyUSB1 115200,8,N,1 ---
--- Quit: Ctrl+] | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H ---
SD_CMD8 is FF
sd init 255
SD card err
W (22141437268) SYSCALL: sys_exit called by core 0 with 0x1

My questions are:

1. Does the sd card demo not support micro sd cards?
2. Are there any other solutions to read micro sd cards?

Thanks!

[Forty-Bot]

Did you adjust the pins in main.c? AFAIK all the demos here assume they run on a KD233.

[SKTT1Ryze]

I have the same problem that the sdcard init failed.
And for the @Forty-Bot 's answer, can you give more details about adjusting the pins in main.c?

[Forty-Bot]

just set the pins in io_mux_init to what they should be for your board

[SKTT1Ryze]

It works, thanks. @Forty-Bot