Adafruit_ILI9341_STM (stm32f1): Compatibility with current HEAD versions of Adafruit GFX

[kiki-lamb]

The ILI9341 has depended on a fairly ancient (1.5.3) version of the Adafruit GFX Library.

This commit makes it compatible with the current HEAD versions of the Adafruit GFX Library by making the following two changes:

• Update references to use textsize_x (renamed in version 1.5.4 of the graphics library) when calculating positions/sizes in Adafruit_GFX_AS.cpp.
• Provides the SPIClass::transfer(...) method expected by Adafruit BusIO's SPIDevice class.

[stevstrong]

While changing all occurrences is one way to solve the issue, wouldn't be nicer to use #define textsize textsize_x before the first occurrence?

[kiki-lamb]

I think whether a #define would be 'nicer' is sort of a toss-up: it's more concise, but on the other hand it's one more macro to remember. If you'd prefer to solve it that way I'll happily concede, though.

[stevstrong]

It is not a clean solution but I will merge this though. If anyone needs more transfer functions for SPI, then I would recommend to use my repo.