Scrambled start / menu screen about uno_manic_miner

[Smashcat]

Thanks, I saw your post and replied on YouTube, but probably better to keep the convo here I think. It definitely looks like a memory issue, as the sprites are also in the wrong place. Is your Arduino UNO an ATMega328P - based board? It seems like the graphical data at the top end of memory is missing or corrupted. If you can tell me the revision of the board you have then I can investigate :) Also, are you using the latest version of Arduino to compile?

[blogmywiki]

It's an Arduino UNO SMD R2 which according to https://support.arduino.cc/hc/en-us/articles/7901453165724-An-overview-of-different-UNO-boards is based on the ATmega328P.

I updated the Arduino IDE just before compiling, I'm on version 2.3.2

Also, the game does seem playable, I can make progress at least on level 1 and score points!

[Smashcat]

Ok that's good that some of it is working at least! I'm going to try sourcing an R2. I have an R3 here, and am getting an SMD R3 to test also. They should all use the same microcontroller though, so I'm wondering if it is the bootloader. When you compile the sketch does it report the following for you?

Sketch uses 32252 bytes (99%) of program storage space. Maximum is 32256 bytes.
Global variables use 1888 bytes (92%) of dynamic memory, leaving 160 bytes for local variables. Maximum is 2048 bytes.

[blogmywiki]

Thanks for this! The compile message, having removed debug.h, is:

Sketch uses 31422 bytes (97%) of program storage space. Maximum is 32256 bytes.
Global variables use 1696 bytes (82%) of dynamic memory, leaving 352 bytes for local variables. Maximum is 2048 bytes.

It won't compile with debug.h present, I get this message:

Sketch uses 32278 bytes (100%) of program storage space. Maximum is 32256 bytes.
Global variables use 1888 bytes (92%) of dynamic memory, leaving 160 bytes for local variables. Maximum is 2048 bytes.
Sketch too big; see https://support.arduino.cc/hc/en-us/articles/360013825179 for tips on reducing it.
text section exceeds available space in board
Compilation error: text section exceeds available space in board

I wonder if I have the wrong programmer selected and that's the cause? (I don't really understand what the programmer is!)

[Smashcat]

Ah! I've just removed debug.h here and see the same decrease in memory usage. It's weird as those functions are not used. Now I'm seeing the same issue you can see. I think I know what it is - watch this space!

[Smashcat]

I have reduced the code size slightly, so it should compile for you with debug.h included now. Been discussing with the Arduino devs and apparently Serial.print() is treated in a "special" way, and always results in additional code, even if not used! For some reason some alignment was being broken when Serial.print() was not included, so I've left it in for now! Please let me know if it fixes things.

[blogmywiki]

That's fixed it! Thank you so much.