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epccs / jtag2updi

UPDI programmer software for Arduino (targets ATtiny 417 / 814 / 816 / 817 / 1614 / 1616 / 1617 and similar MCUs)
MIT License
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FYI: used in ArduinoCore-megaavr #2

Open epccs opened 5 years ago

epccs commented 5 years ago

Firmware used in Arduino Nano Every SAMD11 interface chip with some changes.

https://github.com/arduino/ArduinoCore-megaavr/tree/master/firmwares/MuxTO

ref:

https://www.avrfreaks.net/forum/uploading-code-new-arduino-nano-every

epccs commented 5 years ago

The SAM11 has two UARTS, one is used to program with UPDI interface, and the other acts as a USB to serial bridge to the m4809. The Arduino software takes a 1200 baud toggle to start the programmer mode rather than bridging USB to serial.

I would need this to listen on the serial after rpubus manager toggles reset and then it can program the MCU (m4809) over UPDI from the still-active serial. The MCU will not even need the reset signal.