Erro_21_04_21

> Executing task: C:\Users\micha\.platformio\penv\Scripts\platformio.exe run --target upload <

Processing uno (platform: atmelavr; board: uno; framework: arduino)
----------------------------------------------------------------------------------------------------------------------------------------Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/atmelavr/uno.html
PLATFORM: Atmel AVR (3.3.0) > Arduino Uno
HARDWARE: ATMEGA328P 16MHz, 2KB RAM, 31.50KB Flash
DEBUG: Current (avr-stub) On-board (avr-stub, simavr)
PACKAGES:
 - framework-arduino-avr 5.1.0
 - tool-avrdude 1.60300.200527 (6.3.0)
 - toolchain-atmelavr 1.70300.191015 (7.3.0)
LDF: Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 5 compatible libraries
Scanning dependencies...
No dependencies
Building in release mode
Linking .pio\build\uno\firmware.elf
C:\Users\micha\AppData\Local\Temp\ccm5LbTP.ltrans0.ltrans.o: In function `main':
<artificial>:(.text.startup+0x86): undefined reference to `setup'
<artificial>:(.text.startup+0x8e): undefined reference to `loop'
collect2.exe: error: ld returned 1 exit status
*** [.pio\build\uno\firmware.elf] Error 1
====================================================== [FAILED] Took 6.26 seconds ======================================================O processo de terminal "C:\Users\micha\.platformio\penv\Scripts\platformio.exe 'run', '--target', 'upload'" foi terminado com o código de saída: 1.