Description
Subject of the issue
not running, but successfully compiles on Arduino Nano Every (ATMega4809).
Workbench
MCU: Arduino Nano Every (ATMega4809)
Compiling on Arduino version: 2.1.1 2023-07-03T07:51:40.946Z CLI Version: 0.32.3
Board version Arduino MegaAVR Boards version 1.8.8
tested 4 different displays w/ same result connected with stemma connectors.
Steps to reproduce
Compiles and loads successfully but does have this message:
In file included from ...Arduino/libraries/Alphanumeric_Display/src/SparkFun_Alphanumeric_Display.h:28:0,
from ...Arduino/libraries/Alphanumeric_Display/src/SparkFun_Alphanumeric_Display.cpp:32:
...Library/Arduino15/packages/arduino/hardware/megaavr/1.8.8/libraries/Wire/src/Wire.h: In member function 'bool HT16K33::readRAM(uint8_t, uint8_t, uint8_t*, uint8_t)':
...Library/Arduino15/packages/arduino/hardware/megaavr/1.8.8/libraries/Wire/src/Wire.h:63:12: note: candidate 1: size_t TwoWire::requestFrom(int, int)
size_t requestFrom(int, int);
^~~~~~~~~~~
...Library/Arduino15/packages/arduino/hardware/megaavr/1.8.8/libraries/Wire/src/Wire.h:61:12: note: candidate 2: virtual size_t TwoWire::requestFrom(uint8_t, size_t)
size_t requestFrom(uint8_t, size_t);
All segments light regardless of fed signals
Solution
I got the correct displays by repeating (exactly), in setup(), the needed characters from the character map in SparkFun_Alphanumeric_Display.h (starting line 45) - a few examples.
display.defineChar('<', 0b00110000000000); // '<'
display.defineChar('-', 0b00000101000000); // '-'
display.defineChar('.', 0b00000000000000); // '.'
display.defineChar('/', 0b10010000000000); // '/'
Looks like something relating to board defs or variable declarations are missing either in your code or Arduino's. Sorry, using these for a fast project and don't have time to run this to ground for you.