I'm using IDE 1.8.16. I am getting an allocation error, even though these two codes look identical to me. I am uploading to the same Pro-Mini with the same USB programmer. When I go back and forth between the codes, one works and the other doesn't. Here's the code that works: char this_file[] = "0.…

128×64 pixels / (8 pixels/byte) = 1024 bytes required.

This line allocates 1K bytes of RAM during startup as a screen buffer. That does not show up in the compile/link memory report. [image] Dr_Quark: Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET); You can save a lot of RAM memory by putting character constants like the…

the "more stuff" compiles and loads correctly. It doesn't allocate any additional memory space except for one more "byte i" in a for/next loop, and without the 1306 code, it runs per design. Allocation, as I understand it, only sets aside memory and the 1074 versus 1402 bytes available in the two co…

[image] Dr_Quark: the "more stuff" compiles and loads correctly. It doesn't allocate any additional memory space With an optimising compiler, that's often a dangerous assumption.

[image] Dr_Quark: If so, is there a 1306 library that uses less allocation memory? [image] Dr_Quark: I'm not doing any graphics, only text. So I'm looking for a library that is super skinny. Have a look at: [image] GitHub - greiman/SSD1306Ascii: Text only Arduino Library for S…

Thanks very much. As it turns out, I had a lot of serial.println("") statements that I changed to serial.println(F("")), which freed up a lot of dynamic memory, and the allocation now works. So the required free dynamic memory is between 1070 (doesn't work) and 1400 (works) bytes, to be determined. …

[image] Dr_Quark: I'm suspecting that the text only 1306 library reduces the program memory required, but not so much the dynamic memory. Quite the opposite, the text only library does not use the 1024 bytes of dynamic memory that the Adafruit library allocates at run-time. [image] Dr_Qua…

OLED allocation error--SOLVED

Projects Networking, Protocols, and Devices

anon56112670 February 12, 2023, 5:40pm 2

I wonder what "more stuff" looks like

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OLED allocation error--SOLVED

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