We need SD sample

[msfujino]

I'm having a lot of trouble because there's no SD sample among the expansion board components. Please add an SD sample.

[lboue]

+1

[lboue]

add sd_card example

[msfujino]

Building and uploading works fine, but when I run it, the following error appears and it doesn't work. I'm testing by mounting the nrf54l15 on an expansion board.

1. The “https://github.com/Seeed-Studio/platform-seeedboards/tree/main/examples/zephyr-expansion-base-for-xiao” does not contain “sd-card”. Where are the files located?
2. I am building using the VsCode + PlatformIO environment, which may differ from yours. Please specify your exact environment.

*** Booting Zephyr OS build zephyr-v40100 ***
[00:00:00.440,912] <err> spi_nrfx_spim: Failed to initialize nrfx driver: 0bad0004
[00:00:00.440,918] <err> sdhc_spi: Card SCLK init sequence failed
[00:00:00.440,922] <err> sd: Could not disable card power via SDHC
[00:00:00.440,927] <err> main: Storage init ERROR!
[00:00:00.442,028] <err> os: ***** USAGE FAULT *****
[00:00:00.442,033] <err> os:   Stack overflow (context area not valid)
[00:00:00.442,044] <err> os: r0/a1:  0x20000134  r1/a2:  0x00000000  r2/a3:  0x00000001
[00:00:00.442,050] <err> os: r3/a4:  0x0000820f r12/ip:  0x00008698 r14/lr:  0x09000000
[00:00:00.442,054] <err> os:  xpsr:  0x0000f400
[00:00:00.442,068] <err> os: Faulting instruction address (r15/pc): 0x01e84800
[00:00:00.442,087] <err> os: >>> ZEPHYR FATAL ERROR 2: Stack overflow on CPU 0
[00:00:00.442,100] <err> os: Current thread: 0x20000878 (unknown)
[00:00:00.530,961] <err> os: Halting system

[StarSphere-1024]

It can not work because of spi initailize fail. I tried to find out the reason for the failure, but I didn't succeed. And you can try it.Welcome to submit PR

[Toastee0]

I don't have the carrier board hardware to check this one yet.

[github-actions]

This issue is stale because it has been open 14 days with no activity. Remove stale label or comment or this will be closed in 7 days.

[github-actions]

This issue was closed because it has been stalled for 7 days with no activity.

[Toastee0]

I created a working SD sample.
https://github.com/Toastee0/Seeed-Xiao-nRF54L15/tree/main/xiao_expanded/sd_card

[baorepo]

@Toastee0 来个PR吧，别单独搞个仓库

[StarSphere-1024]

It's awesome — I also discovered the cause of the SPI initialization failure today, too. And I’m currently trying to fix it by switching to a different SPI channel. However, this would conflict with the UART interface, as they share the same hardware peripheral.