Problem with the MuiltipleTextLayersGfx demo and FastLED

[kazzle101]

Hello

I've been trying out the MultipleTextLayersGfx demo found in https://github.com/pixelmatix/SmartMatrix/blob/master/examples/MultipleTextLayersGfx/MultipleTextLayersGfx.ino

If I remove the comment for the line: #define INCLUDE_FASTLED_BACKGROUND

I get the following error:

`MultipleTextLayersGfx:50: error: expected constructor, destructor, or type conversion before '(' token SMARTMATRIX_ALLOCATE_BACKGROUND_GFX_LAYER(backgroundLayer, kMatrixWidth, kMatrixHeight, COLOR_DEPTH, kBackgroundLayerOptions); ^ In file included from C:\Users\karl\AppData\Local\Temp\arduino_modified_sketch_5334\MultipleTextLayersGfx.ino:138:0: C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\FastLED/FastLED.h:14:21: note: #pragma message: FastLED version 3.003.003 #pragma message "FastLED version 3.003.003" ^ MultipleTextLayersGfx: In function 'void setup()': MultipleTextLayersGfx:187: error: 'backgroundLayer' was not declared in this scope matrix.addLayer(&backgroundLayer); ^ MultipleTextLayersGfx: In function 'void loop()': MultipleTextLayersGfx:317: error: 'backgroundLayer' was not declared in this scope while(backgroundLayer.isSwapPending()); ^

MultipleTextLayersGfx:319: error: 'backgroundLayer' was not declared in this scope rgb24 *buffer = backgroundLayer.backBuffer(); ^

expected constructor, destructor, or type conversion before '(' token`

I'm using the latest Arduino IDE/Teensdunio with SmartMatrix 4.0.3 installed.

Thanks Karl

[embedded-creations]

I just pushed a fix, hopefully you can use it as is and don't have to wait for the next release. I checked that it compiles but didn't test as I don't have a test setup handy. Please let me know if this works for you.

https://github.com/pixelmatix/SmartMatrix/commit/43ebc817417c4c404a5302dcc45b4e74766fb1f3

[kazzle101]

Yes, that's working now, but I do see a couple of warning messages:

MultipleTextLayersGfx: In function 'void loop()': MultipleTextLayersGfx:339: warning: iteration 16u invokes undefined behavior buffer[kMatrixWidth*j + i] = CRGB(CHSV(noise[j][i],255,noise[i][j])); ^ C:\Users\karl\AppData\Local\Temp\arduino_modified_sketch_795609\MultipleTextLayersGfx.ino:334:20: note: containing loop for(int i = 0; i < kMatrixWidth; i++) {

Thanks Karl.

[embedded-creations]

Glad it’s working. That warning is related to #81, I think the math (which I didn’t write and don’t understand at a glance) is limited to a smaller width than is commonly used with SmartMatrix Library now.