SAMD51 as Mass storage device using tinyusb

[aiweier1231]

Hi everyone, I want to use my Matrix portal m4(SAMD51) as a USB mass storage device with the Circuitpython running in platformio. Platformio.init:

I have selected the USB stack: TinyUsb by adding build_flags = -D USE_TINYUSB. But somehow, with build_flags = -D USE_TINYUSB. After I upload whatever code,

1. The board no longer shows up under Ports
2. The code that has been uploaded is running fine
3. I can't upload or open the serial monitor.
4. Everything works fine using Arduino IDE to upload.

That would be a great help if someone answers.

Leo

[laermansjohan]

Hi Leo,

Just wanted to say that I have the same problem. So also very interested in why this problem occurs.

Just for info:

Board Metro M4 BSP version Adafruit SAMD Boards version=1.7.2 TinyUSB Library version 1.3.2 - 2021.07.07

Code the basic example demo how to expose on-board external Flash as USB Mass Storage.

Platformio.ini

[env:adafruit_metro_m4]
platform = atmelsam
board = adafruit_metro_m4
framework = arduino
build_flags = -DUSE_TINYUSB
lib_deps =
    https://github.com/adafruit/SdFat
    https://github.com/adafruit/Adafruit_SPIFlash

What happened ? I have a Metro M4 board where the "msc_external_flash" sketch worked (about one year ago) with the Adafruit tinyUSB on platformio and CLion. After updating pio and the libraries, the board USB functions stopped working.(from tinyUSB 0.10.0, Boards version=1.5.14 -> tinyUSB 1.3.2, Boards version=1.7.2, pio 5.1.1 )

How to reproduce ? I have no compilation errors, however all USB functions of the board do not work, no working msc external flash, nor the serial port that is working. The Tx & Rx LEDs on the Metro stay lid. Other code in the loop runs, the board is not locked.

When I do not set the build_flags = -DUSE_TINYUSB in the platformio.ini file and do not use usb_msc (no definition of Adafruit_TinyUSB.h) the boards USB initializes the right way and the serial port works. Also the Tx & Rx LEDs work correct in that case.

Just to show the versions used:

PLATFORM: Atmel SAM (6.2.0) Adafruit Metro M4 HARDWARE: SAMD51J19A 120MHz, 192KB RAM, 512KB Flash DEBUG: Current (atmel-ice) External (atmel-ice, jlink) PACKAGES:

framework-arduino-samd-adafruit 1.7.2
framework-cmsis 2.50400.181126 (5.4.0)
framework-cmsis-atmel 1.2.2
toolchain-gccarmnoneeabi 1.90301.200702 (9.3.1)
LDF: Library Dependency Finder - http://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 35 compatible libraries
Scanning dependencies...
Dependency Graph
|-- SdFat - Adafruit Fork 1.2.4+sha.68dd2d4
| |-- SPI 1.0
| | |-- Adafruit Zero DMA Library 1.1.0
| | | |-- Adafruit TinyUSB Library 1.3.2
| | |-- Adafruit TinyUSB Library 1.3.2
| |-- Adafruit Zero DMA Library 1.1.0
| | |-- Adafruit TinyUSB Library 1.3.2
|-- Adafruit SPIFlash 3.5.2+sha.fa5d4c7
| |-- SPI 1.0
| | |-- Adafruit Zero DMA Library 1.1.0
| | | |-- Adafruit TinyUSB Library 1.3.2
| | |-- Adafruit TinyUSB Library 1.3.2
| |-- Adafruit Zero DMA Library 1.1.0
| | |-- Adafruit TinyUSB Library 1.3.2
| |-- SdFat - Adafruit Fork 1.2.4+sha.68dd2d4
| | |-- SPI 1.0
| | | |-- Adafruit Zero DMA Library 1.1.0
| | | | |-- Adafruit TinyUSB Library 1.3.2
| | | |-- Adafruit TinyUSB Library 1.3.2
| | |-- Adafruit Zero DMA Library 1.1.0
| | | |-- Adafruit TinyUSB Library 1.3.2
|-- Adafruit TinyUSB Library 1.3.2
|-- SPI 1.0
| |-- Adafruit Zero DMA Library 1.1.0
| | |-- Adafruit TinyUSB Library 1.3.2
| |-- Adafruit TinyUSB Library 1.3.2

[aiweier1231]

Hi there,

I also posted the same problem in the platformio community. Here is the link. https://community.platformio.org/t/choose-usb-stack-as-tiny-usb/22451/3

In my case, it's the problem with the library linkage issue. I've added lib_archive = no in platformio.ini and the problem is resolved.

Hope this would also help you.

[laermansjohan]

Hi again,

aiweier1231, the lib_archive = no in platformio.ini did the trick for me.

Big thanks. Regards, Johan