Using PlatformIO (DB-Series)

[tileiar]

Hi All,

these are my first steps with AVR and DxCore. I build up a simple AVR128DB32 board with a serial2updi programmer and use PlatformIO for programming. In the start I had some difficulties setting up PlatformIO. PlatformIO.md seems not to perfectly fit to my setup. I hope it is okay, when I use this post to give some inputs for discussion? I hope this may help others to start with.

Settings in platform.ini for AVRxxDB32 (probably for entire DB-Series)

upload_protocol

Supported UPDI programmers in Avrdude	Notes
serialupdi	Serial2UPDI programmer (installing pyupdi is not necessary)

Example:

[env:Upload_UPDI]
upload_protocol = serialupdi
upload_flags =
upload_speed = 115200
upload_port = /dev/cu.usbserial* resp. COMx

board_hardware.oscillator

Oscillator option	Description
crystal	external crystal on XTALHF pins

Example:

[env]
platform = atmelmegaavr
framework = arduino

; Chip in use
board = AVR128DB32

; clock
board_build.f_cpu = 24000000L           ; Specifies the clock frequency in [Hz].
board_hardware.oscillator = crystal     ; Specifies to use the internal or an external oscillator. [internal|crystal|external]

; Unflag build flags
build_unflags =
; Extra build flags
build_flags =

; Monitor port is auto detected. Override here
;monitor_port =
; Serial monitor baud rate
monitor_speed = 115200

board_hardware.bod

For DB-series:

BOD
2.85v
2.7v
2.45v
1.9v
disabled (default)*

*) DxCore default value is 2.6v which is not supported by AVRxxDB; so the BOD default is disabled

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@SpenceKonde thank you for your unbelievable work!

Best regards
Armin