Error compiling for board Arduino Nano Every

Hardware Nano Family Nano Every
#1

Hey all,

I'm converting from Arduino Uno to Nano, but having issues compiling. It compiled and uploaded fine on the Uno, but having trouble when I try to switch over. I'm working on an Uno Every, ATMEGA4809

Here's the error:

In file included from C:\Users\kriva\OneDrive\Documents\Arduino\libraries\Adafruit_BusIO/Adafruit_BusIO_Register.h:2:0,

                 from C:\Users\kriva\OneDrive\Documents\Arduino\libraries\Adafruit_BusIO/Adafruit_I2CRegister.h:1,

                 from C:\Users\kriva\OneDrive\Documents\Arduino\libraries\Adafruit_VEML6075_Library/Adafruit_VEML6075.h:23,

                 from C:\Users\kriva\Downloads\graberLED_withLED\graberLED_withLED.ino:4:

C:\Users\kriva\OneDrive\Documents\Arduino\libraries\Adafruit_BusIO/Adafruit_SPIDevice.h:11:3: error: conflicting declaration 'typedef enum _BitOrder BitOrder'

 } BitOrder;

   ^~~~~~~~

In file included from C:\Users\kriva\AppData\Local\Arduino15\packages\arduino\hardware\megaavr\1.8.4\cores\arduino/api/Interrupts.h:8:0,

                 from C:\Users\kriva\AppData\Local\Arduino15\packages\arduino\hardware\megaavr\1.8.4\cores\arduino/api/ArduinoAPI.h:32,

                 from C:\Users\kriva\AppData\Local\Arduino15\packages\arduino\hardware\megaavr\1.8.4\cores\arduino/Arduino.h:23,

                 from sketch\graberLED_withLED.ino.cpp:1:

C:\Users\kriva\AppData\Local\Arduino15\packages\arduino\hardware\megaavr\1.8.4\cores\arduino/api/Common.h:28:3: note: previous declaration as 'typedef enum BitOrder BitOrder'

 } BitOrder;

   ^~~~~~~~

In file included from C:\Users\kriva\OneDrive\Documents\Arduino\libraries\Adafruit_BusIO/Adafruit_BusIO_Register.h:2:0,

                 from C:\Users\kriva\OneDrive\Documents\Arduino\libraries\Adafruit_BusIO/Adafruit_I2CRegister.h:1,

                 from C:\Users\kriva\OneDrive\Documents\Arduino\libraries\Adafruit_VEML6075_Library/Adafruit_VEML6075.h:23,

                 from C:\Users\kriva\Downloads\graberLED_withLED\graberLED_withLED.ino:4:

C:\Users\kriva\OneDrive\Documents\Arduino\libraries\Adafruit_BusIO/Adafruit_SPIDevice.h:33:27: error: could not convert 'SPI_BITORDER_MSBFIRST' from '_BitOrder' to 'BitOrder'

        BitOrder dataOrder=SPI_BITORDER_MSBFIRST,

                           ^~~~~~~~~~~~~~~~~~~~~

C:\Users\kriva\OneDrive\Documents\Arduino\libraries\Adafruit_BusIO/Adafruit_SPIDevice.h:39:27: error: could not convert 'SPI_BITORDER_MSBFIRST' from '_BitOrder' to 'BitOrder'

        BitOrder dataOrder=SPI_BITORDER_MSBFIRST,

                           ^~~~~~~~~~~~~~~~~~~~~

exit status 1
Error compiling for board Arduino Nano Every.

Any help is appreciated!

Best,
KR

#2

The problem is that both the Nano Every’s Arduino megaAVR Board core and the Adafruit_BusIO library define _BitOrder, which causes the conflict. I think the best solution is to patch the Adafruit library:

Open C:\Users\kriva\OneDrive\Documents\Arduino\libraries\Adafruit_BusIO/Adafruit_SPIDevice.h in a text editor.

Change lines 2-26 from:

#ifndef Adafruit_SPIDevice_h
#define Adafruit_SPIDevice_h

// some modern SPI definitions don't have BitOrder enum
#if defined(__AVR__) || defined(ESP8266) || defined(TEENSYDUINO)
typedef enum _BitOrder {
  SPI_BITORDER_MSBFIRST = MSBFIRST,
  SPI_BITORDER_LSBFIRST = LSBFIRST,
} BitOrder;
#endif

// some modern SPI definitions don't have BitOrder enum and have different SPI mode defines
#if defined(ESP32)
typedef enum _BitOrder {
  SPI_BITORDER_MSBFIRST = SPI_MSBFIRST,
  SPI_BITORDER_LSBFIRST = SPI_LSBFIRST,
} BitOrder; 
#endif

// Some platforms have a BitOrder enum but its named MSBFIRST/LSBFIRST
#if defined(ARDUINO_ARCH_SAMD) || defined(__SAM3X8E__) || defined(NRF52_SERIES)
  #define SPI_BITORDER_MSBFIRST MSBFIRST
  #define SPI_BITORDER_LSBFIRST LSBFIRST
#endif

to:

#include <Arduino.h>

#ifndef Adafruit_SPIDevice_h
#define Adafruit_SPIDevice_h

// Some platforms have a BitOrder enum but its named MSBFIRST/LSBFIRST
#if defined(ARDUINO_ARCH_SAMD) || defined(__SAM3X8E__) || defined(NRF52_SERIES) || defined(ARDUINO_API_VERSION)
  #define SPI_BITORDER_MSBFIRST MSBFIRST
  #define SPI_BITORDER_LSBFIRST LSBFIRST
#else
// some modern SPI definitions don't have BitOrder enum
#if defined(__AVR__) || defined(ESP8266) || defined(TEENSYDUINO)
typedef enum _BitOrder {
  SPI_BITORDER_MSBFIRST = MSBFIRST,
  SPI_BITORDER_LSBFIRST = LSBFIRST,
} BitOrder;
#endif

// some modern SPI definitions don't have BitOrder enum and have different SPI mode defines
#if defined(ESP32)
typedef enum _BitOrder {
  SPI_BITORDER_MSBFIRST = SPI_MSBFIRST,
  SPI_BITORDER_LSBFIRST = SPI_LSBFIRST,
} BitOrder; 
#endif
#endif

Save the file.

After that, the error should be fixed.

#3