Update

attiny1616-dev-board/firmware/t1616-starter/platformio.ini

@@ -0,0 +1,31 @@
+[env]
+platform = atmelmegaavr
+framework = arduino
+monitor_speed = 115200
+monitor_port = /dev/ttyUSB1
+upload_port = /dev/ttyUSB0
+board_build.f_cpu = 20000000ul
+build_flags =
+    -D ws2812_port=A
+    -D ws2812_pin=7
+lib_deps = 
+  SPI
+  adafruit/Adafruit NeoPixel @ 1.10.7
+
+[env:tiny1616-jtag2updi]
+board = ATtiny1616
+upload_protocol = jtag2updi
+
+[env:tiny1616-serialupdi]
+board = ATtiny1616
+upload_speed = 230400
+upload_flags =
+    --tool
+    uart
+    --device
+    attiny1616
+    --uart
+    $UPLOAD_PORT
+    --clk
+    $UPLOAD_SPEED
+upload_command = pymcuprog write --erase $UPLOAD_FLAGS --filename $SOURCE