ESP32 Forum

Posted: **Thu Jun 20, 2024 12:47 pm**

For the next generation of our hardware, we want to include an SD card in parallel w/ the W5500. I connected a sample via SPI and initialized it as per

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esp_vfs_fat_sdspi_mount

.

Reading seems to work fine, although I get warnings about not supported commands.

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esp32s3> sd start
I (10708) sdspi_transaction: cmd=52, R1 response: command not supported
I (10762) sdspi_transaction: cmd=5, R1 response: command not supported
I (10786) sd: SD card mounted
esp32s3> sd list
/sd/README.TXT
/sd/PHOTO
/sd/PHOTO/THUMBS.DB

Do I need to worry about that or is it just checking for supported features?

Posted: **Thu Jun 20, 2024 2:03 pm**

DrMickeyLauer wrote: ↑
Thu Jun 20, 2024 12:47 pm
Do I need to worry about that or is it just checking for supported features?

It's the latter. There are different possible 'initialization sequences' for SD/MMC cards, and the driver appears to try one after the other until one succeeds with the current card.

Posted: **Fri Jun 21, 2024 4:07 pm**

Great, thanks for confirming!

ESP32 Forum

sdspi_transaction: command not supported

sdspi_transaction: command not supported

Re: sdspi_transaction: command not supported

Re: sdspi_transaction: command not supported