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1kByte USB DFU Bootloader for SAMD11 / SAMD21
CDC-ECM (Linux and macOS USB network) example SAMD21 embedded web server (lwip 2.1.2 based)
USB RNDIS example SAMD21 embedded web server (lwip 2.1.2 based)
Tutorials and example code for SAMD21 and SAMD51 microcontrollers
USB CDC-EEM example SAMD21 embedded web server (lwip 2.1.2 based)
Startup Codes for Sodaq Explorer (SAMD21J18A) without ASF.