FLASH and RAM overflow with U8g2 GraphicsTest

[KenjutsuGH]

• I installed the latest version of U8g2 and selected the _U8g2 -> fullbuffer -> GraphicsTest example
• I then uncomment the line containing U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);
• I then compile the program and get the following error:

  
  /Users/ZZZ/Library/Arduino15/packages/WeActStudio/tools/xpack-arm-none-eabi-gcc/11.2.1-1.2/bin/../lib/gcc/arm-none-eabi/11.2.1/../../../../arm-none-eabi/bin/ld: /private/var/folders/tq/dqrghm993td49tz1pvg8psxm0000gn/T/arduino/sketches/F19B70FC324096054C05F283729F84DF/GraphicsTest.ino.elf section `.rodata' will not fit in region `FLASH'
  /Users/ZZZ/Library/Arduino15/packages/WeActStudio/tools/xpack-arm-none-eabi-gcc/11.2.1-1.2/bin/../lib/gcc/arm-none-eabi/11.2.1/../../../../arm-none-eabi/bin/ld: /private/var/folders/tq/dqrghm993td49tz1pvg8psxm0000gn/T/arduino/sketches/F19B70FC324096054C05F283729F84DF/GraphicsTest.ino.elf section `.bss' will not fit in region `RAM'
  /Users/ZZZ/Library/Arduino15/packages/WeActStudio/tools/xpack-arm-none-eabi-gcc/11.2.1-1.2/bin/../lib/gcc/arm-none-eabi/11.2.1/../../../../arm-none-eabi/bin/ld: region `FLASH' overflowed by 9923364 bytes
  /Users/ZZZ/Library/Arduino15/packages/WeActStudio/tools/xpack-arm-none-eabi-gcc/11.2.1-1.2/bin/../lib/gcc/arm-none-eabi/11.2.1/../../../../arm-none-eabi/bin/ld: region `RAM' overflowed by 87600 bytes
  collect2: error: ld returned 1 exit status

exit status 1

Compilation error: exit status 1

I then select the **BlackPill F401CC** board and compile again:

Sketch uses 38788 bytes (14%) of program storage space. Maximum is 262144 bytes. Global variables use 2808 bytes (4%) of dynamic memory, leaving 62728 bytes for local variables. Maximum is 65536 bytes.

Why does the code fit on the **BlackPill F401CC** but not the **AT32F403ACGU7 BlackPill**?

[XanCraft21]

I am having this same issue. As far as i can tell it seems that the software has trouble correctly calculating the memory usage. Even if it did work, with my testing i found that SPI and I2C interfaces don’t even work in the first place, even though there are software drivers.

This is just my personal opinion, i would recommend sticking to the official STM32 chips and avoid all the knockoffs out there.