HardwareSerial.h inline error Arduino 1.6.7

[quarterturn]

I'm trying to program an AT90USB162-based LCD USB Backpack (the Adafruit one) to make a minor firmware change, and Arduino 1.6.7 is failing here with your HardwareSerial.h:

adafruit-cu40025SCPB-U5A:41: error: no matching function for call to 'HardwareSerial::HardwareSerial()' HardwareSerial Uart = HardwareSerial(); ^ /home/alex/Arduino/adafruit-cu40025SCPB-U5A/adafruit-cu40025SCPB-U5A.ino:41:38: note: candidates are: In file included from /home/alex/.arduino15/packages/MattairTech_Arduino/hardware/avr/1.6.9-mt1/cores/arduino/Arduino.h:224:0, from sketch/adafruit-cu40025SCPB-U5A.ino.cpp:1: /home/alex/.arduino15/packages/MattairTech_Arduino/hardware/avr/1.6.9-mt1/cores/arduino/HardwareSerial.h:117:12: note: HardwareSerial::HardwareSerial(volatile uint8_t*, volatile uint8_t*, volatile uint8_t*, volatile uint8_t*, volatile uint8_t*, volatile uint8_t*) inline HardwareSerial( ^ /home/alex/.arduino15/packages/MattairTech_Arduino/hardware/avr/1.6.9-mt1/cores/arduino/HardwareSerial.h:117:12: note: candidate expects 6 arguments, 0 provided /home/alex/.arduino15/packages/MattairTech_Arduino/hardware/avr/1.6.9-mt1/cores/arduino/HardwareSerial.h:93:7: note: constexpr HardwareSerial::HardwareSerial(const HardwareSerial&) class HardwareSerial : public Stream ^ /home/alex/.arduino15/packages/MattairTech_Arduino/hardware/avr/1.6.9-mt1/cores/arduino/HardwareSerial.h:93:7: note: candidate expects 1 argument, 0 provided /home/alex/.arduino15/packages/MattairTech_Arduino/hardware/avr/1.6.9-mt1/cores/arduino/HardwareSerial.h:93:7: note: constexpr HardwareSerial::HardwareSerial(HardwareSerial&&) /home/alex/.arduino15/packages/MattairTech_Arduino/hardware/avr/1.6.9-mt1/cores/arduino/HardwareSerial.h:93:7: note: candidate expects 1 argument, 0 provided exit status 1 no matching function for call to 'HardwareSerial::HardwareSerial()'

Any ideas on how to fix? I'm not very much a C++ person so please excuse if it's obvious.

[mattairtech]

I can take a look. Can you please provide a link to the product used and the sketch that fails compilation.

[quarterturn]

It’s the Adafruit USB Serial LCD Backpack: https://github.com/adafruit/Adafruit-USB-Serial-RGB-Character-Backpack <https://github.com/adafruit/Adafruit-USB-Serial-RGB-Character-Backpack> It turns out their code handled the non-USB UART in the 90USB162 by creating a new HardwareSerial instance vs the usual ’Serial1’ for something like a 32u4. I guess that worked back when they did it, but it doesn’t now. So it’s not an issue in your code. I had a Leonardo on hand and with a few changes to the Adafruit code it works fine. Thanks for your reply though!

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On Nov 19, 2019, at 10:38 PM, Justin Mattair ***@***.***> wrote: I can take a look. Can you please provide a link to the product used and the sketch that fails compilation. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#2?email_source=notifications&email_token=AAF6P25LINYBYLD6I7DFUXDQUSWLVA5CNFSM4JPJ6MG2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEEQS6BY#issuecomment-555822855>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAF6P26PM36R74ZR3HJ4B7LQUSWLVANCNFSM4JPJ6MGQ>.