not running, but successfully compiles on Arduino Nano Every (ATMega4809)

[bethanysciences]

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.

[sfe-SparkFro]

Thanks for the bug report! I've tested this on my end and confirmed the behavior you're seeing. Looks like the root problem is here:

SparkFun_Alphanumeric_Display_Arduino_Library/src/SparkFun_Alphanumeric_Display.cpp

Lines 39 to 44 in db56283

	#if defined(ARDUINO_ARCH_AVR)
	#include <avr/pgmspace.h>
	static const uint16_t PROGMEM alphanumeric_segs[96]{
	#else
	static const uint16_t alphanumeric_segs[96]{
	#endif

It appears ARDUINO_ARCH_AVR is not defined for the Nano Every, will just add another check for that.

[sfe-SparkFro]

Should be fixed in v2.2.9! Thanks again for the report!

[bethanysciences]

Love you guys, thanks!