TAB5: Unable to mount SD card as USB mass storage

Reply to TAB5: Unable to mount SD card as USB mass storage on Thu, 06 Nov 2025 03:02:47 GMT

tinyu806 — Thu, 06 Nov 2025 03:02:47 GMT

Using this example is fine.

https://github.com/espressif/esp-idf/tree/master/examples/peripherals/usb/device/tusb_msc

sdkconfig.defaults

# This file was generated using idf.py save-defconfig. It can be edited manually.
# Espressif IoT Development Framework (ESP-IDF) 5.5.1 Project Minimal Configuration
#
CONFIG_IDF_TARGET="esp32p4"
CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
CONFIG_PARTITION_TABLE_CUSTOM=y
CONFIG_EXAMPLE_STORAGE_MEDIA_SDMMC=y
CONFIG_EXAMPLE_SD_PWR_CTRL_LDO_INTERNAL_IO=n
CONFIG_ESP_CONSOLE_USB_SERIAL_JTAG=y
CONFIG_FATFS_LFN_HEAP=y
CONFIG_WL_SECTOR_SIZE_512=y
CONFIG_WL_SECTOR_MODE_PERF=y
CONFIG_TINYUSB_MSC_ENABLED=y

Reply to TAB5: Unable to mount SD card as USB mass storage on Fri, 31 Oct 2025 15:05:15 GMT

rkirchne — Fri, 31 Oct 2025 15:05:15 GMT

I'm having the same issue with my Tab5, when I try USBMSC or SD2USBMSC examples in Arduino IDE they upload fine but I don't get a usb device on my computer. I did notice in the serial monitor that it says USB-Serial/JTAG, even though I changed the settings under tools, following this fellows video:
https://www.youtube.com/watch?v=hJSBTFsOnoA
He's using a ESP32-S3 and it seems to work fine. One thing I did discover in the ESP32-P4 docs is that it needs the strapping pins set in order to get the chip in Joint download mode:
https://docs.espressif.com/projects/esp-hardware-design-guidelines/en/latest/esp32p4/schematic-checklist-esp32p4.html#schematic-checklist-strapping-pins
It also can share the same lines for USB:
https://docs.espressif.com/projects/esp-hardware-design-guidelines/en/latest/esp32p4/schematic-checklist-esp32p4.html#usb
I think the usb-c might be connected to both sets of lines and the pins are not set correctly to select joint download mode. I couldn't really determine this in the schematics provided by M5 as they are confusing but I think they need to provide separate examples and libraries for the ESP32-P4 as it is quite different from the ESP32-S3

Reply to TAB5: Unable to mount SD card as USB mass storage on Tue, 23 Sep 2025 07:53:47 GMT

vitalEOL — Tue, 23 Sep 2025 07:53:47 GMT

@henryCharm

Thanks for the feedback.

I have tried several examples from both the Arduino & IDF (both updated to the latest) and none of them seem to expose the Tab5 as a usb device:

USB Keyboard & Mouse examples
USB Custom HID device
USBMSC example
USB Serial example

I can get similar projects working on my ESP32-S3 device without issue..

I'm wondering if anyone has a working example of the Tab5 enumerating as a USB device?

Reply to TAB5: Unable to mount SD card as USB mass storage on Tue, 16 Sep 2025 12:49:39 GMT

henryCharm — Tue, 16 Sep 2025 12:49:39 GMT

Hi,

From what you described and the logs, it looks like the SD card is being detected and mounted correctly, but the USB MSC interface reports USB UNPLUGGED (ARDUINO_USB_STOPPED_EVENT). This usually means the USB host (e.g., your PC) is not recognizing the device as connected or the USB device stack on the ESP32-P4 isn’t properly signaling a connection.

check:

Make sure the USB data lines (D+ and D-) and power (VBUS) are hooked up right. If you’re just powering through the battery spots without the USB power line, the computer might think the device is unplugged.
Check that the USB Mass Storage mode is turned on in your code and board settings.
Use the latest ESP32-P4 USB support in Arduino or ESP-IDF. Sometimes the USB stuff on this chip can be a bit tricky.
If you don’t see USB started or resume messages, the USB connection might not be working properly or the computer isn’t recognizing the device.
Run a basic USB example (like USB serial or simple storage) to see if USB itself works, without the SD card part.
Make sure the pins for SD card and USB don’t clash with each other or other parts.

this is all I can think off