Adafruit MCP23017 i2c library with Arduino Due (IDE 1.5.2)

[Dewy]

Just a silly i2c (and Due) noob question.

I'm trying to use the Adafruit MCP23017 library with the Arduino Due (IDE 1.5.2)
Here's the problem, the IDE automatically switches configs/backend between AVR and ARM during board select.

Select the Arduino Mega2560 for example and the library works just fine. (As advertised.)

However if you select the Arduino Due as the target device the back-end changes and the library no longer works.

So my noob question question is; can I copy the headers from the AVR toolchain into a sketch sub-folder labeled "avr" and have it work safely?

It does compile this way, but when it got around to calling for the fuse.h file I got concerned, stopped short of uploading it, and clicked by here for some skilled advice.

The library calls for avr/pgmspace.h...
pgmspace.h calls for:
avr/common.h
avr/fuse.h
avr/io.h
avr/lock.h
avr/portpins.h
avr/sfr_defs.h
avr/version.h

Surely, such a mediation is not going to be that simple.

Any advice?

[adafruit_support_rick]

The Due is a completely different processor architecture; totally unrelated to the AVR. Our libraries have to be ported before they will work on a Due. This is something that we're working on right now, but it's not necessarily a trivial task and it will take some time. All I can say is that we're trying to get through them all as quickly as we can.

[Dewy]

Thank you Driverblock, I was nearly certain that was going to fail.

BTW, dose the ARM actually use fuses? And if so can one be bricked by such misconceptions?

[adafruit_support_rick]

BTW, dose the ARM actually use fuses? And if so can one be bricked by such misconceptions?

Good question. I just had a squint at the SAM3X datasheet. I didn't see anything that looked like a fuse. They have some "lock regions" in flash, and a "security bit" which can be set to prevent any external access to flash (so nobody can download and hack your executable).

So far, I haven't seen anything that can't be undone. Unsetting the security bit simply requires wiping the flash.

It looks like no bricking is possible, so go ahead - do yer worst!

[Dewy]

Thanks! I shall *surly-forth...

*surly = bikers only do one thing with a 'Sally'. >;)

[adafruit_support_rick]

Odd. The bike in your avatar doesn't look like a Surly...