I'm trying to build the LED backpack code for an Arduino Due (FQBN arduino:sam:arduino_due_x via arduino-cli), and the binary fails to link:
Code: Select all
In function `output_to_alpha(Adafruit_AlphaNum4*, unsigned short, char)':
/Users/xxx/Documents/Arduino/xxx/xxx.ino:455: undefined reference to `Adafruit_AlphaNum4::writeDigitAscii(unsigned char, unsigned char, int)'
collect2: error: ld returned 1 exit status
I am only a C wizard, not a C++ wizard, and despite hitting the code with a hammer, I can't figure out what's wrong. Does anyone have any ideas?