Can't compile Adafruit GFX for Attiny861

[TLINDEN]

I can compile a sample sketch withe SPI library (the one included with AttinyCore) included w/o problems, but when I add GFX, it goes nuts:

libraries/GFX/Adafruit_SPITFT.cpp:43:30: error: ‘SPDR’ was not declared in this scope
 #define AVR_WRITESPI(x) for (SPDR = (x); (!(SPSR & _BV(SPIF)));)
                              ^~~~
libraries/GFX/Adafruit_SPITFT.cpp:1303:7: note: in expansion of macro ‘AVR_WRITESPI’
       AVR_WRITESPI(hi);
       ^~~~~~~~~~~~
libraries/GFX/Adafruit_SPITFT.cpp:43:30: note: suggested alternative: ‘SPI’
 #define AVR_WRITESPI(x) for (SPDR = (x); (!(SPSR & _BV(SPIF)));)
                              ^~~~
libraries/GFX/Adafruit_SPITFT.cpp:1303:7: note: in expansion of macro ‘AVR_WRITESPI’
       AVR_WRITESPI(hi);
       ^~~~~~~~~~~~
libraries/GFX/Adafruit_SPITFT.cpp:43:45: error: ‘SPSR’ was not declared in this scope
 #define AVR_WRITESPI(x) for (SPDR = (x); (!(SPSR & _BV(SPIF)));)
                                             ^~~~
libraries/GFX/Adafruit_SPITFT.cpp:1303:7: note: in expansion of macro ‘AVR_WRITESPI’
       AVR_WRITESPI(hi);
       ^~~~~~~~~~~~
libraries/GFX/Adafruit_SPITFT.cpp:43:45: note: suggested alternative: ‘SPI’
 #define AVR_WRITESPI(x) for (SPDR = (x); (!(SPSR & _BV(SPIF)));)
                                             ^~~~
libraries/GFX/Adafruit_SPITFT.cpp:1303:7: note: in expansion of macro ‘AVR_WRITESPI’
       AVR_WRITESPI(hi);
       ^~~~~~~~~~~~
In file included from /usr/local/avr/avr/include/avr/io.h:99,
                 from /usr/local/avr/avr/include/avr/pgmspace.h:90,
                 from ./hardware/ATTinyCore/avr/cores/tiny/Arduino.h:9,
                 from libraries/GFX/Adafruit_GFX.h:5,
                 from libraries/GFX/Adafruit_SPITFT.h:25,
                 from libraries/GFX/Adafruit_SPITFT.cpp:36:
libraries/GFX/Adafruit_SPITFT.cpp:43:56: error: ‘SPIF’ was not declared in this scope
 #define AVR_WRITESPI(x) for (SPDR = (x); (!(SPSR & _BV(SPIF)));)
                                                        ^~~~
[..]

etc etc

Looks like GFX requires some hardware SPI stuff not available on 861, but the README says, SPI works via USI. I'm confused.

Code and Makefile: https://github.com/TLINDEN/attinycore-makefile-tests/tree/master/861-tinycore-test

[SpenceKonde]

This is a problem with the library - rather than using the supplied SPI library, it uses it's own api implementation, which is not compatible with USI devices. The comments indicate that it does not support attiny devices (I suspect they do not have enough SRAM)

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On Thu, Feb 20, 2020, 13:33 T.v.Dein notifications@github.com wrote:

I can compile a sample sketch withe SPI library (the one included with AttinyCore) included w/o problems, but when I add GFX, it goes nuts:

libraries/GFX/Adafruit_SPITFT.cpp:43:30: error: ‘SPDR’ was not declared in this scope

define AVR_WRITESPI(x) for (SPDR = (x); (!(SPSR & _BV(SPIF)));)

                          ^~~~

libraries/GFX/Adafruit_SPITFT.cpp:1303:7: note: in expansion of macro ‘AVR_WRITESPI’

   AVR_WRITESPI(hi);

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

libraries/GFX/Adafruit_SPITFT.cpp:43:30: note: suggested alternative: ‘SPI’

define AVR_WRITESPI(x) for (SPDR = (x); (!(SPSR & _BV(SPIF)));)

                          ^~~~

libraries/GFX/Adafruit_SPITFT.cpp:1303:7: note: in expansion of macro ‘AVR_WRITESPI’

   AVR_WRITESPI(hi);

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

libraries/GFX/Adafruit_SPITFT.cpp:43:45: error: ‘SPSR’ was not declared in this scope

define AVR_WRITESPI(x) for (SPDR = (x); (!(SPSR & _BV(SPIF)));)

                                         ^~~~

libraries/GFX/Adafruit_SPITFT.cpp:1303:7: note: in expansion of macro ‘AVR_WRITESPI’

   AVR_WRITESPI(hi);

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

libraries/GFX/Adafruit_SPITFT.cpp:43:45: note: suggested alternative: ‘SPI’

define AVR_WRITESPI(x) for (SPDR = (x); (!(SPSR & _BV(SPIF)));)

                                         ^~~~

libraries/GFX/Adafruit_SPITFT.cpp:1303:7: note: in expansion of macro ‘AVR_WRITESPI’

   AVR_WRITESPI(hi);

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

In file included from /usr/local/avr/avr/include/avr/io.h:99,

             from /usr/local/avr/avr/include/avr/pgmspace.h:90,

             from ./hardware/ATTinyCore/avr/cores/tiny/Arduino.h:9,

             from libraries/GFX/Adafruit_GFX.h:5,

             from libraries/GFX/Adafruit_SPITFT.h:25,

             from libraries/GFX/Adafruit_SPITFT.cpp:36:

libraries/GFX/Adafruit_SPITFT.cpp:43:56: error: ‘SPIF’ was not declared in this scope

define AVR_WRITESPI(x) for (SPDR = (x); (!(SPSR & _BV(SPIF)));)

                                                    ^~~~

[..]

etc etc

Looks like GFX requires some hardware SPI stuff not available on 861, but the README says, SPI works via USI. I'm confused.

Code and Makefile: https://github.com/TLINDEN/attinycore-makefile-tests/tree/master/861-tinycore-test

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