"Please specify `upload_port`" error even though I'm uploading using USBasp

Hi!

I go this strange error and AFAIK I’ve never seen this before. I’m trying to upload code to an ATmega324PB (MightyCore) and have the following platformio.ini file

; ENVIRONMENT SETTINGS
[env:MightyCore]
platform = atmelavr
framework = arduino

; TARGET SETTINGS
; PlatformIO requires the board parameter. Must match your actual hardware
board = ATmega324PB
; Clock frequency in [Hz]
board_build.f_cpu = 8000000L

; BUILD OPTIONS
; Current pinout
board_build.variant = mightycore_standard
; Comment out to enable LTO (this line unflags it)
build_unflags = -flto

; UPLOAD SETTINGS
; Upload serial port is automatically detected by default. Override by uncommenting the line below
;upload_port = COM4
; Upload baud rate
;board_upload.speed = 57600

; Upload using programmer
upload_protocol = usbasp
; Aditional upload flags
upload_flags = -Pusb

; SERIAL MONITOR OPTIONS
; Monitor and upload port is the same by default
;monitor_port = COM4
; Serial monitor baud rate
;monitor_speed = 250000

For uploading, I choose “Upload using Programmer” under env:MightyCore. After a short while I get this error:

Linking .pio\build\MightyCore\firmware.elf
Checking size .pio\build\MightyCore\firmware.elf
Building .pio\build\MightyCore\firmware.hex
Memory Usage -> http://bit.ly/pio-memory-usage
DATA:    [=====     ]  54.0% (used 1105 bytes from 2048 bytes)
PROGRAM: [=====     ]  51.7% (used 16676 bytes from 32256 bytes)
Configuring upload protocol...
AVAILABLE: usbasp
CURRENT: upload_protocol = usbasp
Looking for upload port...
Error: Please specify `upload_port` for environment or use global `--upload-port` option.
For some development platforms it can be a USB flash drive (i.e. /media/<user>/<device name>)
*** [program] Explicit exit, status 1
============================================================================================================ [ERROR] Took 5.72 seconds ============================================================================================================
The terminal process terminated with exit code: 1

Why do I have to specify upload_port when I’m using a USBasp programmer?

[MCUdude]

Awesome! PlatformIO is getting better every day 👍 Thank you for being so available and spending time helping out users like me!

Please inform me when new releases of your cores will be available.

AFAIK only MightyCore is affected by the SPI1 related bug we’ve discussed earlier. I’ll keep you informed! It won’t be long, promise 🙂

[saintofinternet]

My Env. settings are as follows

[env:168pa16m] platform = atmelavr board = pro8MHzatmega328 framework = arduino lib_deps = locoduino/MemoryUsage@^2.21.1 upload_protocol = usbasp

I am getting the following error after upload via USBASP programmer to an Arudino Pro Mini

avrdude: verifying … avrdude: verification error, first mismatch at byte 0x20a9 0x21 != 0xf1 avrdude: verification error; content mismatch

avrdude: safemode: Fuses OK (E:FD, H:DA, L:FF)

avrdude done. Thank you.

*** [upload] Error 1